Composite antibacterial ceramic tile and preparation process thereof

Composite antibacterial ceramic tile and its preparation technology technical field

[0001] The present invention relates to the technical field of building ceramic materials, in particular to a composite antibacterial ceramic tile and its preparation process

[0002] Ceramic tiles are plate-shaped or block-shaped ceramic products produced from clay and other inorganic non-metallic materials through molding and sintering processes. They can be used to decorate and protect the walls and floors of buildings and structures. In actual application, due to the application of some special scenes, some ceramic tiles with special functions are needed to meet the actual application requirements. For example, in some special places such as hospitals and pharmacies, floor tiles with long-lasting antibacterial functions are required to meet actual application requirements.

[0003] The existing patent (application number: CN201410334157.8) proposes a bacteriostatic and deodorizing ceramic tile and a preparation method thereof. The product includes the following components in parts by weight: zircon sand 80~100, igneous rock Mud 40~60, Beitouite 35~55, Cinder 28~36, Magnetite 20~30, Calcite 15~25, Corundum Powder 12~18, Ball ±10~15, Mung Bean Rock 14~26, Sepiolite 20~ 25. Crushed gravel 30-40, nano-calcium titanate 10-15, blast furnace slag 15-20, traditional Chinese medicine slag ash 5-10, and waste glass powder 18-27. The product has broad-spectrum antibacterial characteristics and has the effect of absorbing pollutant gases such as toluene and formaldehyde.

[0004] Although the products in the above-mentioned patents have broad-spectrum antibacterial characteristics, they can absorb decoration pollution gases such as toluene and formaldehyde. However, the above-mentioned ceramic tiles have short antibacterial effectiveness and a long production cycle, and in some cases still cannot meet the actual application requirements well. Based on this, it is necessary to propose a new type of ceramic tile with long-term antibacterial function.

Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a composite antibacterial ceramic tile and its preparation process to solve the technical problems proposed in the background art.

[0006] The present invention proposes a composite antibacterial ceramic tile, which is composed of the following components by weight percentage: quartz sand 20% ~ 45%, kaolin ± 15% ~ 20%, feldspar 5% ~ 7%, copper nitrate 5%~7%, wollastonite 8%~10%, talc 1%~2%, nepheline 5%~7%, antibacterial agent 5%~8%, auxiliary material 6%~9% and strengthening material 5%~ 10%, wherein the auxiliary materials include diamond, magnesite and spodumene, the antibacterial agent includes bentonite and silver nitrate, and the reinforcing material includes carbon nitride and graphene.

[0007] Preferably, the auxiliary material includes the following components by weight percentage:

[0008] Diamond 2%~3%, magnesite 2%-3% and spodumene 2%~3%. In this preferred embodiment, magnesite and diamond have excellent fire resistance, spodumene It is not only used as a fluxing agent, but also an important component to ensure the formation of low thermal expansion crystals.

[0009] Preferably, the antibacterial agent includes the following components by weight percentage:

[0010] Swelling ± 3% ~ 5% and silver nitrate 2% ~ 3% ο In this preferred embodiment, bentonite and silver nitrate can produce nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier, which is antibacterial and durable and green Environmental protection.

[0011] Preferably, the reinforcing material includes the following components by weight percentage:

[0012] Carbon nitride 2%~6% and graphene 3%~4%. In this preferred embodiment, carbon nitride has very high strength, graphene has excellent properties such as toughness, and the combination of carbon nitride and graphene can greatly increase ceramic tiles.

Strength of.

[0013] Preferably, the composite antibacterial ceramic tile includes the following components by weight percentage:

[0014] Quartz sand 35%, kaolin ± 15%, feldspar 5%, copper nitrate 5%, wollastonite 10%, talc 1%, nepheline 5%, azolite 3%, magnesite 3%, Spodumene 3%, swelling ±3%, silver nitrate 2%, carbon nitride 6%, and graphene 4%. In this preferred embodiment, since quartz sand is the skeleton material in the ceramic tile, kaolin makes the dry body plastic. Feldspar acts as a "fluxing agent". Both magnesite and diamond have excellent fire resistance. Copper nitrate produces copper oxide during processing and has antibacterial properties. The combination of wollastonite, nepheline and talc can be used in the firing process. The phenomenon of self-release glaze will occur in Bentonite has plasticity and can also be used with silver nitrate to form nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier. Therefore, the ceramic tile made by this formula has good fire resistance, poor antibacterial effect, good glaze gloss and high strength.

[0015] Preferably, the composite antibacterial ceramic tile includes the following components by weight percentage:

[0016] Quartz sand 30%, kaolin ± 20%, feldspar 5%, copper nitrate 7%, wollastonite 10%, talc 1%, nepheline 5%, pyrocene 3%, magnesite 3%, Spodumene 3%, swelling ±5%, silver nitrate 3%, carbon nitride 2%, and graphene 3%. In this preferred embodiment, because quartz sand is the framework material in ceramic tiles, kaolin makes the dry billet plastic, feldspar acts as a "fluxing agent", magnesite and diamond have excellent fire resistance, copper nitrate The copper oxide generated during the processing has specific antibacterial properties, and the combination of wollastonite, nepheline, and talc can produce self-release glaze during the firing process. Bentonite has plasticity and can produce nano-silver-loaded inorganic antibacterial agent with silver nitrate as a carrier. Therefore, the ceramic tile made by this formula has good fire resistance, antibacterial effect, good glaze gloss and average strength.

[0017] Preferably, the composite antibacterial ceramic tile includes the following components by weight percentage:

[0018] Quartz sand 20%, kaolin 20%, feldspar 7%, copper nitrate 7%, wollastonite 10%, talc 2%, nepheline 7%, plexite 3%, magnesite 3%, spodumene Stone 3%, bentonite 5%, silver nitrate 3%, carbon nitride 6% and graphene 4%. In this preferred embodiment, because quartz sand is the framework material in ceramic tiles, kaolin makes the dry billet plastic, feldspar acts as a "fluxing agent", magnesite and diamond have excellent fire resistance, copper nitrate The copper oxide generated during the processing has specific antibacterial properties, and the combination of wollastonite, nepheline, and talc can produce self-releasing glaze phenomenon during the firing process. Bentonite has plasticity and can produce nano-silver-loaded inorganic antibacterial agent with silver nitrate as a carrier. Therefore, the ceramic tile made by this formula has good fire resistance, good antibacterial effect, good glaze gloss and high strength.

[0019] The present invention also provides a preparation process of a composite antibacterial ceramic tile, which is used to prepare the composite antibacterial ceramic tile as described above, and the method includes the following steps:

[0020] Step 1: Take a formula amount of bentonite and silver nitrate, and prepare a nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier by an ion exchange method for use;

[0021] Step 2: Take the formula amount of kaolin, feldspar, quartz sand, azolite, magnesite, spodumene and copper nitrate, mix the raw materials uniformly and add them to a ball mill for 8-10 hours; where, the added The ratio of raw materials, grinding balls and water is 1: 0.8: 0.5. After the grinding is completed, it is passed through a 100-150 mesh sieve. After sieving, it is spray-dried in an environment with a hot air temperature of 450°C to 500°C. During the spray drying process, nitric acid Most of the nitric acid in the copper is removed, and the dried powder is collected to obtain a mixed powder one; [0022] Step 3: Take the formula amount of nepheline, talc and wollastonite and pulverize, pass a 200-300 mesh sieve, and crush the pulverized nepheline and talc And the wollastonite and the mixed powder are added to the mixer, and 3% to 7% of the weight of the mixture is added to the water glass with a solid content of 35%, stirred and mixed for 20 minutes, and then added to the nano-silver-loaded inorganic material with bentonite as the carrier. Antibacterial agent, carbon nitride and graphene, stir again for 20min~30min, after the stirring is completed, press the powder under a pressure of 30~40MPa, and dry it at 60°C~70°C for 3~4h to obtain a dry compact;

[0023] Step 4: Raise the obtained dry billet to 850~900°C at a temperature rise rate of 10~15°C/min and keep it warm for 1~

2h. At this time, the copper removed by nitric acid is decomposed by high temperature to decompose the copper oxide, and then rise to 1200~1300 °C at a heating rate of 5~10°C/min and keep it for 3~4h. When the temperature rises, the low melting point of nepheline melts and releases it. The surface of the green body, and drives part of the copper oxide and the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier to move out, and then drops to 340~380°C at a cooling rate of 6~8°C/min and keeps the temperature for 2~3h, then cools to room temperature , The finished product can be obtained after edging and packaging.

[0024] The preparation process of the composite antibacterial ceramic tile, wherein the ion exchange method is used to carry out the reaction conditions at a temperature of 120°C, the pH during the reaction is less than 7, and the reaction time is 24h. In this preferred embodiment, the control of temperature, pH value and time is beneficial to fully bond silver ions in the pores of the bentonite.

[0025] The preparation process of the composite antibacterial ceramic tile, wherein after the preparation of the dry blank is finished, the printing process is performed on the dry blank. In this preferred embodiment, different decorations can be given to ceramic tiles through printing processing.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] Quartz sand is the framework material in ceramic tiles, kaolin makes the dry body plastic, and feldspar acts as a "fluxing agent". The use of bentonite and silver nitrate can produce a nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier, which is antibacterial and environmentally friendly. The plasticity of bentonite makes the dry billet easier to shape. The copper nitrate in the formula produces copper oxide during processing. It has antibacterial properties. ;

[0028] (2) The combination of wollastonite, nepheline, and talc can produce self-releasing glaze phenomenon during the firing process, minus the processing steps of glaze preparation and glaze application. In addition, nepheline took the lead in the process of melting and external release, driving part of the copper oxide and the nano-silver-loaded inorganic antibacterial substance with bentonite as the carrier to move out, so that the surface of the tile has a better antibacterial effect.

[0029] Other features and advantages of the present disclosure will be described in the following, or some of the features and advantages can be inferred or unambiguously determined, or can be learned by implementing the above-mentioned technology of the present disclosure.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following is a detailed description of preferred embodiments together with the accompanying drawings.

Description of the drawings

[0031] FIG. 1 is a flow chart of the preparation process of the composite antibacterial ceramic tile proposed by the present invention.

Detailed ways

[0032] In order to facilitate the understanding of the present invention, the present invention will be more fully described below with reference to the relevant drawings. The preferred embodiment of the present invention is shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

[0034] Embodiment 1:

[0035] The first embodiment of the present invention proposes a composite antibacterial ceramic tile, the composition is composed of the following weight ratio: quartz sand 35%, kaolin ± 15%, feldspar 5%, copper nitrate 5%, wollastonite 10% , Talc 1%, nepheline 5%, diamond 3%, magnesite 3%, spodumene 3%, swelling ±3%, silver nitrate 2%, carbon nitride 6% and graphene 4%.

[0036] In this embodiment, a corresponding preparation process of a composite antibacterial ceramic tile is proposed, which includes the following steps:

[0037] Step 1: Take the formula amount of swelling agent and silver nitrate, and use ion exchange method to prepare sodium swelling agent as a carrier.

The rice-loaded silver inorganic antibacterial agent is ready for use. The reaction conditions of the ion exchange method are the temperature of 120°C, the pH during the reaction is less than 7, and the reaction time is 24h; [0038] Step 2: Take the formula amount of kaolin, feldspar, quartz sand, zircon, For magnesite, spodumene and copper nitrate, mix the raw materials uniformly and add them to a ball mill for 8-10 hours. The ratio of raw materials, grinding balls and water is 1:0.8:0.5. After grinding, pass through a 100-150 mesh sieve and sieving. After spray drying, the hot air temperature is 500°C, most of the nitric acid in the copper nitrate is removed during the spray drying process, and the dried powder is collected to obtain a mixed powder one;

[0039] Step 3: Take the prescribed amount of nepheline, talc and wollastonite and pulverize, pass through a 200-300 mesh sieve, and add the crushed nepheline, talc and wollastonite and the mixed powder into the mixer and add The water glass with a solid content of 35% equivalent to 3% to 7% of the weight of the mixture is stirred and mixed for 20 minutes, and then a nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier is added, and stirred again for 20 to 30 minutes. The powder is pressed into a shape under a pressure of 40MPa, and dried at 60~70°C for 3~4 hours to obtain a dry blank, and the printing process is performed after the dry blank is completed;

[0040] Step 4: The obtained dry billet is raised to 850~900°C at a heating rate of 10~15°C/min and kept for 1~2h, at this time the copper removed by nitric acid is decomposed by high temperature copper oxide; then 5~ The heating rate of 10°C/min rises to 1200~1300°C and keeps it for 3~4h; when the temperature rises, due to the low melting point of nepheline, it is first melted and released to the surface of the green body, and drives part of the copper oxide and the nano-silver with bentonite as the carrier The inorganic antibacterial agent is moved outside, and then reduced to 340°C to 380°C at a cooling rate of 6 to 8°C/min and kept for 2 to 3 hours, cooled to normal temperature, and finished by edging and packaging.

[0041] Embodiment 2:

[0042] The second embodiment of the present invention proposes a composite antibacterial ceramic tile, the ingredients are composed of the following weight ratios:

[0043] Quartz sand 30%, kaolin ± 20%, feldspar 5%, copper nitrate 7%, wollastonite 10%, talc 1%, nepheline 5%, azolite 3%, magnesite 3%, Spodumene 3%, bentonite 5%, silver nitrate 3%, carbon nitride 2%, and graphene 3%.

[0044] In this embodiment, a corresponding preparation process of a composite antibacterial ceramic tile is proposed, which includes the following steps:

[0045] Step 1: Take the formula amount of swelling agent and silver nitrate, use ion exchange method to prepare nano-silver-loaded inorganic antibacterial agent with swelling agent as carrier for use, the reaction condition of ion exchange method is 120° C., pH during reaction Less than 7, the reaction time is 24h; [0046] Step 2: Take the formula amount of kaolin, feldspar, quartz sand, azolite, magnesite, spodumene and copper nitrate, mix the raw materials uniformly and add them to a ball mill for 8 hours. The ratio of grinding balls to water is 1:0.8:0.5. After grinding, pass through a 100-mesh sieve, and spray dry after sieving. The hot air temperature is 500°C. During the spray drying process, most of the nitric acid in the copper nitrate is removed, and the dried powder is collected. Mixed powder one;

[0047] Step 3: Take the formula amount of nepheline, talc and wollastonite to crush, pass a 200-mesh sieve, add the crushed nepheline, talc and wollastonite and the mixed powder into the mixer, and add the equivalent After mixing 3% by weight of the water glass with 35% solids content for 20 minutes, add the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier, and stir again for 20 minutes. After the mixing is completed, the powder is pressed into a shape under a pressure of 30 MPa. And dry at 70 °C for 3 hours to make a dry blank, and then perform printing treatment after the dry blank is finished;

[0048] Step 4: Raise the obtained dry billet at a heating rate of 15°C/min to 900°C and keep it for 1h. At this time, the copper removed by nitric acid undergoes pyrolysis of copper oxide; and then rises at a heating rate of 5°C/min To 1200°C and keep it for 3h; when the temperature rises, due to the low melting point of nepheline, it will first melt and release to the surface of the green body, and drive part of the copper oxide and the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier to move out, and then 6°C/min The cooling rate is reduced to 340°C and kept for 2h, then cooled to normal temperature, and the finished product is obtained after edging and packaging.

[0049] Embodiment 3:

[0050] The third embodiment of the present invention proposes a composite antibacterial ceramic tile, the components are composed of the following weight ratios:

[0051] Quartz sand 20%, kaolin 20%, feldspar 7%, copper nitrate 7%, wollastonite 10%, talc 2%, nepheline 7%, zirconium

Stone 3%, magnesite 3%, spodumene 3%, bentonite 5%, silver nitrate 3%, carbon nitride 6% and graphene 4%.

[0052] In this embodiment, a corresponding preparation process of a composite antibacterial ceramic tile is proposed, which includes the following steps:

[0053] Step 1: Take the formula amount of bentonite and silver nitrate, and prepare a nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier by the ion exchange method for use. The reaction condition of the ion exchange method is a temperature of 120° C., and the pH is less than 7 during the reaction. Time 24h; [0054] Step 2: Take the formula amount of kaolin, feldspar, quartz sand, azolite, magnesite, spodumene and copper nitrate, mix the raw materials evenly and add them to a ball mill to grind for 8 hours, the raw materials, grinding balls and The ratio of water is 1:0.8:0.5. After grinding, it is passed through a 100-mesh sieve. After sieving, spray drying is performed. The hot air temperature is 500°C. During the spray drying process, most of the nitric acid in the copper nitrate is removed.

[0055] Step 3: Take the formula amount of nepheline, talc and wollastonite to crush, pass a 300-mesh sieve, add the crushed nepheline, talc and wollastonite and the mixed powder to the mixer, and add the equivalent After mixing 7% by weight of the water glass with a solid content of 35% and mixing for 20 minutes, add the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier, and stir again for 30 minutes. After the mixing is completed, the powder is pressed into a shape under a pressure of 40 MPa. And dry at 70 °C for 4 hours to make a dry blank, after the dry blank is completed, the printing process is carried out;

[0056] Step 4: Raise the obtained dry billet to 900°C at a heating rate of 15°C/min and keep it for 2h. At this time, the copper removed by nitric acid is decomposed by high temperature to decompose copper oxide; and then rise at a heating rate of 10°C/min. Heat for 4 hours at 1300°C; when the temperature rises, nepheline is melted and released to the surface of the green body due to its low melting point, and drives part of the copper oxide and the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier to move outside, and then 8°C/min The cooling rate is reduced to 380°C and kept for 3h, then cooled to normal temperature, and the finished product is obtained after edging and packaging.

[0057] Embodiment 4:

[0058] The fourth embodiment of the present invention proposes a composite antibacterial ceramic tile, the components are composed of the following weight ratios:

[0059] Quartz sand 35%, kaolin ± 20%, feldspar 7%, copper nitrate 5%, wollastonite 8%, talc 1%, nepheline 5%, alexandite 2%, magnesite 2%, Spodumene 2%, bentonite 4%, silver nitrate 2%, carbon nitride 3%, and graphene 4%.

[0060] In this embodiment, a corresponding preparation process of a composite antibacterial ceramic tile is proposed, which includes the following steps:

[0061] Step 1: Take the formula amount of swelling agent and silver nitrate, use ion exchange method to prepare nano-silver-loaded inorganic antibacterial agent with swelling agent as carrier for use. The reaction conditions of ion exchange method are temperature 120° C., pH during reaction Less than 7, the reaction time is 24h; [0062] Step 2: Take the formula amount of kaolin, feldspar, quartz sand, azolite, magnesite, spodumene and copper nitrate, mix the raw materials evenly and add them to a ball mill for 9h, raw materials The ratio of grinding balls to water is 1:0.8:0.5. After grinding, go through a 125 mesh sieve, and spray dry after sieving. The hot air temperature is 450°C. During the spray drying process, most of the nitric acid in the copper nitrate is removed, and the dried powder is collected. Mixed powder one;

[0063] Step 3: Take the formula amount of nepheline, talc and wollastonite to crush, pass through a 300 mesh sieve, add the crushed nepheline, talc and wollastonite and the mixed powder into the mixer, and add the equivalent After mixing the water glass with a solid content of 3% to 7% by weight of the mixture for 20 minutes, add the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier, and stir again for 30 minutes. After the mixing is completed, the powder is mixed under a pressure of 35MPa Press molding, and dry at 65 °C for 4 hours to make a dry blank, after the dry blank is finished, it will be printed;

[0064] Step 4: Raise the obtained dry billet at a heating rate of 15°C/min to 900°C and keep it for 2h. At this time, the copper removed by nitric acid is decomposed by high temperature to decompose copper oxide; and then the temperature rise rate is 10°C/min. To 1300°C and keep it for 4h; when the temperature rises, due to the low melting point of nepheline, it is first melted and released to the surface of the green body, and drives part of the copper oxide and the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier to move out, and then the temperature is 6~8°C The cooling rate per min is reduced to 380°C and kept for 3h, then cooled to normal temperature, and the finished product is obtained after edging and packaging.

[0065] Embodiment 5:

[0066] The fifth embodiment of the present invention proposes a ceramic tile, which is composed of the following weight ratios:

[0067] Quartz sand 35%, kaolin ± 20%, feldspar 5%, talc 1%, diamond 3%, magnesite 3%, and spodumene 2%.

[0068] In this embodiment, a corresponding preparation process of ceramic tiles is proposed, which includes the following steps:

[0069] Step 1: Feeding and grinding, adding the weighed quartz sand, kaolin, feldspar, talc, diamond, magnesite and spodumene to a ball mill for grinding for 10-12 hours, the ratio of raw materials, grinding balls and water It is 1:1:0.8, after the grinding is completed, a slurry is made.

[0070] Step 2: Sieving staleness, the slurry is sieved to remove iron and then put into a slurry tank for 8 to 10 hours to stale, and after the staleness is completed, a mixed slurry is obtained;

[0071] Step 3: Spray drying, spray drying the mixed slurry, hot air temperature of 500°C, and drying to obtain powder one; [0072] Step 4: molding, controlling the pressure to be 20-30 MPa, and pressing the powder into a shape, Then, it is dried at 50~60°C for 4~6 hours, the product obtained after drying is placed in a firing furnace, and the temperature is controlled to be 1200~1300°C and fired for 1~2 hours, moulded, and cooled to obtain a ceramic product.

[0073] Embodiment 6:

[0074] The sixth embodiment of the present invention proposes a ceramic tile, which is composed of the following weight ratios:

[0075] Quartz sand 33%, kaolin ± 20%, feldspar 5%, talc 2%, diamond 2%, magnesite 3%, and spodumene 3%.

[0076] In this embodiment, a corresponding preparation process of ceramic tiles is proposed, which includes the following steps:

[0077] Step 1: Feeding and grinding, adding the weighed quartz sand, kaolin, feldspar, talc, diamond, magnesite and spodumene to a ball mill for 12 hours, and the ratio of raw materials, grinding balls and water is 1:1 :0.8, the first slurry is obtained after the grinding is completed; [0078] Step 2: sieving stale, the slurry is sieved to remove iron and then put into the slurry tank to stale for 10 hours, and the mixed slurry one is obtained after the stale is completed;

[0079] Step 3: Spray drying, spray drying the mixed slurry, hot air temperature of 500 °C, drying to obtain powder one; [0080] Step 4: molding, control the pressure at 30 MPa to press the powder into molding, and then 60 °C After drying for 6 hours, the product obtained after drying is placed in a firing furnace, and the temperature is controlled at 1300 DEG C for firing for 2 hours, the mold is reversed, and the product is cooled to obtain a ceramic product.

[0081] Embodiment 7:

[0082] The seventh embodiment of the present invention proposes a ceramic tile, which is composed of the following weight ratios:

[0083] Quartz sand 45%, kaolin ± 15%, feldspar 7%, talc 2%, diamond 2%, magnesite 2%, and spodumene 3%.

[0084] In this embodiment, a corresponding preparation process of ceramic tiles is proposed, which includes the following steps:

[0085] Step 1: Feeding and grinding, adding the weighed quartz sand, kaolin, feldspar, talc, diamond, magnesite and spodumene to a ball mill for 12 hours, and the ratio of raw materials, grinding balls and water is 1:1 :0.8, the first slurry is obtained after the grinding is completed; [0086] Step 2: sieving the stale, put the slurry into the slurry tank to stale for 10h after sieving to remove iron, and get the mixed slurry one after the aging is completed;

[0087] Step 3: Spray drying, spray drying the mixed slurry, hot air temperature of 500 °C, drying to obtain powder one; [0088] Step 4: molding, control the pressure at 30 MPa to press the powder into molding, and then 60 °C After drying for 6 hours, the product obtained after drying is placed in a firing furnace, and the temperature is controlled at 1300 DEG C for firing for 2 hours, the mold is poured, and the ceramic product is obtained by cooling.

[0089] Embodiment 8:

[0090] The eighth embodiment of the present invention proposes a ceramic tile, which is composed of the following weight ratios:

[0091] Quartz sand 45%, kaolin ± 15%, feldspar 7%, talc 1%, diamond 3%, magnesite 2%, and spodumene 2%.

[0092] In this embodiment, a corresponding preparation process of ceramic tiles is proposed, which includes the following steps:

[0093] Step 1: Feeding and grinding, adding the weighed quartz sand, kaolin, feldspar, talc, diamond, magnesite and spodumene to a ball mill for 12 hours, and the ratio of raw materials, grinding balls and water is 1: 1 :0.8, after the grinding is completed, a slurry is prepared; [0094] Step 2: sieving and stale, the slurry is sieved to remove iron, and then placed in a slurry tank for 10h, and a mixed slurry is obtained after aging is completed;

[0095] Step 3: Spray drying, spray drying the mixed slurry, hot air temperature 500 °C, after drying to obtain powder one;

[0096] Step 4: Forming, control the pressure at 30MPa to press the powder into a shape, then dry at 60°C for 6 hours, place the dried product in a firing furnace, control the temperature at 1300°C, fire for 2 hours, and then cool it to obtain Ceramic products.

[0097] Table 1: The formula table of the composite antibacterial ceramic tiles in each embodiment (unit: kg)

<td>[0098]</td><td>Ingredients\\</td><td>Example 1</td><td>Example 2</td><td>Example 3</td><td>Example 4</td><td>Example 5</td><td>Example 6</td><td>Example 7</td><td>Example 8</td>

<td>Quartz sand</td><td>35</td><td>30</td><td>20</td><td>35</td><td>35</td><td>33</td><td>45</td><td>45</td>

<td>Kaolin</td><td>15</td><td>20</td><td>20</td><td>20</td><td>20</td><td>20</td><td>15</td><td>15</td>

<td>Feldspar</td><td>5</td><td>5</td><td>7</td><td>7</td><td>5</td><td>5</td><td>7</td><td>7</td>

<td>Copper nitrate</td><td>5</td><td>7</td><td>7</td><td>5</td><td>0</td><td>0</td><td>0</td><td>0</td>

<td>Wollastonite</td><td>10</td><td>10</td><td>10</td><td>8</td><td>0</td><td>0</td><td>0</td><td>0</td>

<td>talc</td><td>1</td><td>1</td><td>2</td><td>1</td><td>1</td><td>2</td><td>2</td><td>1</td>

<td>Nepheline</td><td>5</td><td>5</td><td>7</td><td>5</td><td>0</td><td>0</td><td>0</td><td>0</td>

<td>Wrong stone</td><td>3</td><td>3</td><td>3</td><td>2</td><td>3</td><td>2</td><td>2</td><td>3</td>

<td>Magnesite</td><td>3</td><td>3</td><td>3</td><td>2</td><td>3</td><td>3</td><td>2</td><td>2</td>

<td>Spodumene</td><td>3</td><td>3</td><td>3</td><td>2</td><td>2</td><td>3</td><td>3</td><td>2</td>

<td>Bentonite</td><td>3</td><td>5</td><td>5</td><td>4</td><td>0</td><td>0</td><td>0</td><td>0</td>

<td>Silver nitrate</td><td>2</td><td>3</td><td>3</td><td>2</td><td>0</td><td>0</td><td>0</td><td>0</td>

<td>Carbon Nitride</td><td>6</td><td>2</td><td>6</td><td>3</td><td>0</td><td>0</td><td>0</td><td>0</td>

<td>Graphene</td><td>4</td><td>3</td><td>4</td><td>4</td><td>0</td><td>0</td><td>0</td><td>0</td>

[0100] Among them, Example 1 to Example 4 are composite antibacterial ceramic tiles prepared by the present invention, and Example 5 to Example 8 are antibacterial ceramic tiles prepared by traditional processes.

[0101] Specifically, the composite antibacterial ceramic tiles prepared in Example 1 to Example 8 and the commercially available antibacterial ceramic tiles were tested for comparison. In addition, 50 parts of the composite antibacterial ceramic tiles prepared in Examples 1 to 8 and the commercially available antibacterial ceramic tiles were taken for performance comparison tests. The corresponding test results are shown in Table 2.

[0102] Table 2: Performance test results of composite antibacterial ceramic tiles prepared in Example 1 to Example 8 and comparison of commercially available antibacterial ceramic tiles

[0103]

<td></td><td>Example 1</td><td>Example 2</td><td>Example 3</td><td>Example 4</td><td>Example 5</td><td>Example 6</td><td>Example 7</td><td>Example</td><td>Anti-ceramic</td>

<td>The strength of the stone monument</td><td>High intensity</td><td>high strength</td><td>High intensity</td><td>high strength</td><td>high strength</td><td>high strength</td><td>Higher intensity</td><td>high strength</td><td>Medium intensity</td>

<td>Fire resistance</td><td>well</td><td>well</td><td>well</td><td>it is good</td><td>it is good</td><td>it is good</td><td>well</td><td>general</td><td>general</td>

<td>Escherichia coli sterilization rate</td><td>97.89%</td><td>99.66%</td><td>99.88%</td><td>97.73%</td><td>9322%</td><td>95J2%</td><td>9322%</td><td></td><td>6423%</td>

<td>Antibacterial durability</td><td>94.32%</td><td>95.32%</td><td>9732%</td><td>89.32%</td><td>82.32%</td><td>7932%</td><td>8932%</td><td>6932%</td><td>39.32%</td>

<td>Glaze gloss</td><td>Good gloss</td><td>Good gloss</td><td>Good gloss</td><td>Good gloss</td><td>Good gloss</td><td>Good gloss</td><td>Better gloss</td><td>Better gloss</td><td>Average gloss</td>

[0104]

[0105] It can be seen from the above table: The composite antibacterial ceramic tile prepared by the preparation method of the present invention, compared with the antibacterial ceramic tile prepared by the traditional process, the composite antibacterial ceramic tile prepared by the present invention has better performance than the ceramic tile prepared by the traditional process. Long-lasting antibacterial ability.

[0106] In the above embodiments, since the strength of the ceramic tile is greatly affected by the proportion of carbon nitride and graphene, the fire resistance of the ceramic tile is greatly affected by the proportion of magnesite and diamond, and the antibacterial property of the ceramic tile is affected by copper nitrate and nitric acid. The proportion of silver and bentonite is more affected, and the gloss of tile glaze is greatly affected by the proportion of wollastonite, talc and nepheline. Therefore, through comprehensive comparison, it can be seen that the composite antibacterial ceramic tile manufactured by using the formula in Example 3 has the best performance.

[0107] The beneficial effects of the present invention are: the composite antibacterial ceramic tile manufactured by the present invention is not only simple in process, readily available in raw materials, and safe and non-toxic. At the same time, the composite antibacterial ceramic tile has high strength, good fire resistance, good sterilization effect, long sterilization lasting time and good glaze gloss during use.

[0108] The specific process of the present invention is as follows:

[0109] Take the bentonite and silver nitrate of the formula, and prepare a nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier by an ion exchange method for use;

[0110] Take the formula amount of kaolin, feldspar, quartz sand, azolite, magnesite, spodumene and copper nitrate, mix the raw materials uniformly and add them to a ball mill to grind for 8-10 hours. The ratio of raw materials, grinding balls and water is 1:0.8:0.5, after grinding, pass through a 100-150 mesh sieve, after sieving, spray drying, hot air temperature 450 °C ~ 500 °C, during the spray drying process, most of the nitric acid in the copper nitrate is removed, and the dried powder is collected to obtain a mixed powder one ;

[0111] Take the formula amount of nepheline, talc and wollastonite to crush, pass a 200-300 mesh sieve, add the crushed nepheline, talc, and wollastonite with the mixed powder into the mixer, and add the equivalent weight of the mixture 3%~7% water glass with a solid content of 35% was stirred and mixed for 20 minutes, and then added the nano-silver-loaded inorganic antibacterial agent with bentonite as a carrier, and stirred again for 20 minutes~30min. After the stirring was completed, the powder was pressed under the pressure of 30~40MPa Forming and drying at 60°C~70°C for 3~4 hours to obtain a dry body;

[0112] The obtained dry billet was raised to 850~900°C at a temperature increase rate of 10~15°C/min and kept for 1~2h. At this time, the copper removed by nitric acid was decomposed by high temperature to decompose the copper oxide, and then the temperature was 5~10°C/min. The heating rate of min rises to 1200~1300C and keeps it for 3~4h. When the temperature rises, due to the low melting point of nepheline, it first melts and releases to the surface of the green body, and drives part of the copper oxide and the nano-silver-loaded inorganic antibacterial agent with bentonite as the carrier. It is moved, then reduced to 340-380°C at a cooling rate of 6-8°C/min and kept for 2 to 3 hours, cooled to room temperature, edging, and packaged to obtain the finished product.

[0113] Finally, it should be noted that the above-mentioned embodiments are only specific implementations of the present invention to illustrate the present invention.

The scope of protection of the present invention is not limited to this technical solution. Although the present invention has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand: any technology familiar with the technical field Within the technical scope disclosed by the present invention, personnel can still modify or easily think of changes to the technical solutions described in the foregoing embodiments, or equivalently replace some of the technical features; these modifications, changes, or replacements are not The essence of the corresponding technical solutions deviates from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.