An anti-fouling ceramic material and its preparation method

Abstract

The present invention discloses an anti-fouling ceramic material and a preparation method thereof, relating to the technical field of anti-fouling ceramic materials. The anti-fouling ceramic material includes a ceramic base layer; a spray coating layer, which is sprayed on the surface of the ceramic base layer through a plasma process; a curing layer; the curing layer is coated on the outer side of the spray coating layer; the spray coating layer is a powder made by mixing Cr2O3, SiO2, TiO2, CuO and clay powder; the curing layer is a colloid made by mixing Na2O, K2O, MgO, CaO, Al2O3 and SiO2; by arranging the spray coating layer and the curing layer on the outer side of the ceramic base layer, the anti-fouling effect on the surface of the ceramic base layer can be ensured. The curing layer can make the surface of the ceramic base layer have better smoothness and be smoother, and cooperate with the spray coating layer to further improve the anti-fouling effect of the ceramic base layer.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-fouling ceramic materials, and particularly relates to an anti-fouling ceramic material and a preparation method thereof. Background Art

[0002] Ceramic materials refer to materials made of clay, feldspar, and quartz, which are translucent, non-absorbent, and corrosion-resistant. Ceramics have many excellent properties such as excellent insulation, corrosion resistance, high temperature resistance, high hardness, low density, and radiation resistance, and have been widely used in various fields of the national economy. Among them, anti-fouling ceramic materials refer to ceramic materials with anti-fouling properties. The surface of this kind of ceramic material is not easily stained with oil and is easy to clean;

[0003] At present, the anti-fouling ceramic material is prepared by coating a spray layer on the base layer of the ceramic material. The spray layer can make the ceramic material have the effect of anti-oil pollution, but the physical strength of the spray layer is relatively low and the flatness is poor, resulting in a weakened anti-fouling effect of the anti-fouling ceramic material. Summary of the Invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide an anti-fouling ceramic material and a preparation method thereof, so as to solve the problem in the prior art that a spray layer is coated on the base layer of the ceramic material. The spray layer can make the ceramic material have the effect of anti-oil pollution, but the physical strength of the spray layer is relatively low and the flatness is poor, resulting in a weakened anti-fouling effect of the anti-fouling ceramic material.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A preparation method of an anti-fouling ceramic material includes the following steps:

[0007] Preparation of the ceramic base layer: firing a ceramic base layer using clay;

[0008] Preparation of the spray layer: mixing Cr2O3, SiO2, TiO2, CuO, and clay powder evenly according to a set ratio to form a mixed powder, wherein the contents of Cr2O3, SiO2, TiO2, CuO, and clay powder are 5.2%, 17.2%, 9.2%, 10.2%, and 58.2% respectively;

[0009] High-temperature roasting: roasting the mixed powder at a temperature of 500°C - 800°C;

[0010] Plasma process spraying: spraying the roasted mixed powder on the surface of the ceramic base layer using a plasma spraying device to form a spray layer;

[0011] Preparation of the solidified layer: Add Na2O, K2O, MgO, CaO, Al2O3 and SiO2 into a ball mill according to a set ratio for ball milling, and then put the ball-milled mixed powder into a crucible for melting to make the mixed powder completely molten;

[0012] Rapid cooling: Pour the completely molten mixed powder into cold water for rapid cooling, quench it into a molten block in water, then break it and ball mill it again, and then add the powder formed by ball milling into glycerol for wet milling to form a glaze slurry colloid;

[0013] Solidification: Coat the glaze slurry colloid on the surface of the sprayed layer, air dry it and then fire and solidify it to solidify the sprayed layer and form a solidified layer.

[0014] As a further scheme of the present invention: The time of the high-temperature roasting is 1.5 h.

[0015] As a further scheme of the present invention: In the rapid cooling, the cold water is deionized water and the temperature of the cold water is 12 °C.

[0016] As a further scheme of the present invention: The contents of Na2O, K2O, MgO, CaO, Al2O3 and SiO2 in the solidified layer are 3.2%, 5.0%, 8.0%, 10.0%, 5.0% and 58.8% respectively.

[0017] As a further scheme of the present invention: The thickness of the sprayed layer is 0.30 mm - 0.35 mm, and the thickness of the solidified layer is 0.25 mm - 0.30 mm.

[0018] An anti-fouling ceramic material, which is prepared by using the preparation method described above, and the anti-fouling ceramic material includes:

[0019] A ceramic base layer;

[0020] A sprayed layer, which is sprayed on the surface of the ceramic base layer by a plasma process;

[0021] A solidified layer; the solidified layer is coated on the outside of the sprayed layer;

[0022] The sprayed layer is a powder made of a mixture of Cr2O3, SiO2, TiO2, CuO and clay powder;

[0023] The solidified layer is a colloid made of a mixture of Na2O, K2O, MgO, CaO, Al2O3 and SiO2.

[0024] As a further scheme of the present invention: The contents of Cr2O3, SiO2, TiO2 and CuO in the sprayed layer are Cr2O3: 8.5%, SiO2: 25.5%, TiO2: 14.5%, CuO: 12.5% respectively, and the rest is clay powder.

[0025] As a further solution of the present invention: the contents of Na2O, K2O, MgO, CaO, Al2O3 and SiO2 in the curing layer are respectively Na2O: 6.2%, K2O: 10.0%, MgO: 16.0%, CaO: 15.0%, Al2O3: 8.0%, and the rest is SiO2.

[0026] The beneficial effects of the present invention: by providing a spray coating layer and a curing layer on the outer side of the ceramic base layer, wherein the spray coating layer is a powder made by mixing Cr2O3, SiO2, TiO2, CuO and clay powder, which can ensure the anti-fouling effect on the surface of the ceramic base layer, and the curing layer is a colloid made by mixing Na2O, K2O, MgO, CaO, Al2O3 and SiO2. While improving the strength of the spray coating layer, the curing layer can make the surface of the ceramic base layer have better smoothness and be smoother, and cooperate with the spray coating layer to further improve the anti-fouling effect of the ceramic base layer. Description of the Drawings

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 It is a flowchart of the preparation method of the anti-fouling ceramic material of the present invention. Detailed Embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] The anti-fouling ceramic material disclosed by the present invention mainly includes a ceramic base layer, a spray coating layer and a curing layer;

[0032] Among them, the spray coating layer is sprayed on the surface of the ceramic base layer by a plasma process, and the curing layer is coated on the outer side of the spray coating layer. The spray coating layer is a powder made by mixing Cr2O3, SiO2, TiO2, CuO and clay powder, and the curing layer is a colloid made by mixing Na2O, K2O, MgO, CaO, Al2O3 and SiO2;

[0033] The contents of Cr2O3, SiO2, TiO2 and CuO in the spray coating layer are respectively Cr2O3: 5.2%, SiO2: 17.2%, TiO2: 9.2%, CuO: 10.2%, and the rest is clay powder;

[0034] The contents of Na2O, K2O, MgO, CaO, Al2O3 and SiO2 in the solidified layer are respectively Na2O: 6.2%, K2O: 10.0%, MgO: 16.0%, CaO: 15.0%, Al2O3: 8.0%, and the rest is SiO2;

[0035] As Figure 1 shown, prepare Cr2O3, SiO2, TiO2, CuO and clay powder, Na2O, K2O, MgO, CaO, Al2O3 and SiO2, and process Cr2O3, SiO2, TiO2, CuO and clay powder, Na2O, K2O, MgO, CaO, Al2O3 and SiO2 according to the following steps:

[0036] Preparation of the ceramic base layer: Fire the ceramic base layer using clay;

[0037] Preparation of the sprayed coating: Mix Cr2O3, SiO2, TiO2, CuO and clay powder evenly according to a set ratio to form a mixed powder, and the contents of Cr2O3, SiO2, TiO2, CuO and clay powder are respectively: 5.2%, 17.2%, 9.2%, 10.2%, 58.2%;

[0038] High-temperature roasting: Roast the mixed powder at a temperature of 600 °C, and the high-temperature roasting time is 1.0 h;

[0039] Plasma spraying process: Spray the roasted mixed powder on the surface of the ceramic base layer using a plasma spraying device to form a sprayed coating, and the plasma spraying device is used;

[0040] Preparation of the solidified layer: Add Na2O, K2O, MgO, CaO, Al2O3 and SiO2 into a ball mill according to a set ratio for ball milling. The contents of Na2O, K2O, MgO, CaO, Al2O3 and SiO2 in the solidified layer are respectively 3.2%, 5.0%, 8.0%, 10.0%, 5.0% and 58.8%. Then put the ball-milled mixed powder into a crucible for melting to make the mixed powder completely molten;

[0041] Quenching: Pour the completely molten mixed powder into cold water for quenching. Deionized water is used for the cold water during quenching, and the temperature of the cold water is 12 °C. It is quenched into a molten block, then broken and ball milled again. Then add the powder formed by ball milling into glycerin for wet milling to form a glaze slurry colloid;

[0042] Solidification: Coat the glaze slurry colloid on the surface of the sprayed coating, dry it and then fire and solidify it to solidify the sprayed coating and form a solidified layer.

[0043] Control the thickness of the sprayed coating to be 0.30 mm and the thickness of the solidified layer to be 0.25 mm;

[0044] Label the anti-fouling ceramic material as No. 1, test its surface properties, and record them.

[0045] Example 2

[0046] The anti-fouling ceramic material disclosed by the present invention mainly includes a ceramic base layer, a spray coating layer, and a curing layer;

[0047] Among them, the spray coating layer is sprayed on the surface of the ceramic base layer through a plasma process, and the curing layer is coated on the outside of the spray coating layer. The spray coating layer is a powder made by mixing Cr2O3, SiO2, TiO2, CuO, and clay powder, and the curing layer is a colloid made by mixing Na2O, K2O, MgO, CaO, Al2O3, and SiO2;

[0048] The contents of Cr2O3, SiO2, TiO2, and CuO in the spray coating layer are Cr2O3: 6.5%, SiO2: 21.5%, TiO2: 12.5%, CuO: 11.5% respectively, and the rest is clay powder;

[0049] The contents of Na2O, K2O, MgO, CaO, Al2O3, and SiO2 in the curing layer are Na2O: 4.2%, K2O: 7.5%, MgO: 12.0%, CaO: 12.5%, Al2O3: 6.5% respectively, and the rest is SiO2;

[0050] As Figure 1 shown, prepare Cr2O3, SiO2, TiO2, CuO, and clay powder, Na2O, K2O, MgO, CaO, Al2O3, and SiO2, and process Cr2O3, SiO2, TiO2, CuO, and clay powder, Na2O, K2O, MgO, CaO, Al2O3, and SiO2 according to the following steps:

[0051] Preparation of the ceramic base layer: Fire the ceramic base layer using clay;

[0052] Preparation of the spray coating layer: Mix Cr2O3, SiO2, TiO2, CuO, and clay powder evenly according to a set ratio to form a mixed powder, where the contents of Cr2O3, SiO2, TiO2, and CuO are 6.5%, 21.5%, 12.5%, and 11.5% respectively, and the rest is clay powder;

[0053] High-temperature roasting: Roast the mixed powder at a temperature of 600 °C, and the high-temperature roasting time is 1.5 h;

[0054] Plasma process spraying: Spray the roasted mixed powder on the surface of the ceramic base layer using a plasma spraying device to form a spray coating layer, and the plasma spraying device is used;

[0055] Preparation of the solidified layer: Add Na2O, K2O, MgO, CaO, Al2O3 and SiO2 into a ball mill according to a set ratio for ball milling. The contents of Na2O, K2O, MgO, CaO, and Al2O3 in the solidified layer are 4.2%, 7.5%, 12.0%, 12.5%, and 6.6% respectively, and the rest is SiO2. Then put the ball-milled mixed powder into a crucible for melting to make the mixed powder completely molten;

[0056] Rapid cooling: Pour the completely molten mixed powder into cold water for rapid cooling. Deionized water is used as the cold water during rapid cooling, and the temperature of the cold water is 12°C. It is quenched into a molten block, then broken and ball-milled again. Then add the powder formed by ball milling into glycerol for wet milling to form a glaze slurry colloid;

[0057] Solidification: Coat the glaze slurry colloid on the surface of the sprayed layer, air-dry it and then fire and solidify it to solidify the sprayed layer and form a solidified layer.

[0058] Control the thickness of the sprayed layer to be 0.30 mm and the thickness of the solidified layer to be 0.25 mm;

[0059] Mark this anti-fouling ceramic material as No. 2, test its surface performance and record it.

[0060] Example 3

[0061] The anti-fouling ceramic material disclosed in the present invention mainly includes a ceramic base layer, a sprayed layer and a solidified layer;

[0062] Among them, the sprayed layer is sprayed on the surface of the ceramic base layer by a plasma process, and the solidified layer is coated on the outside of the sprayed layer. The sprayed layer is a powder made by mixing Cr2O3, SiO2, TiO2, CuO and clay powder, and the solidified layer is a colloid made by mixing Na2O, K2O, MgO, CaO, Al2O3 and SiO2;

[0063] The contents of Cr2O3, SiO2, TiO2 and CuO in the sprayed layer are Cr2O3: 8.5%, SiO2: 25.5%, TiO2: 14.5%, CuO: 12.5% respectively, and the rest is clay powder;

[0064] The contents of Na2O, K2O, MgO, CaO, Al2O3 and SiO2 in the solidified layer are Na2O: 6.2%, K2O: 10.0%, MgO: 16.0%, CaO: 15.0%, Al2O3: 8.0% respectively, and the rest is SiO2;

[0065] Such as Figure 1As shown, prepare Cr2O3, SiO2, TiO2, CuO and clay powder, Na2O, K2O, MgO, CaO, Al2O3 and SiO2, and process Cr2O3, SiO2, TiO2, CuO and clay powder, Na2O, K2O, MgO, CaO, Al2O3 and SiO2 according to the following steps:

[0066] Preparation of ceramic base layer: Fire the clay to prepare the ceramic base layer;

[0067] Preparation of spray coating: Mix Cr2O3, SiO2, TiO2, CuO and clay powder evenly according to a set ratio to form a mixed powder, where the contents of Cr2O3, SiO2, TiO2, and CuO are 8.5%, 25.5%, 14.5%, and 12.5% respectively, and the rest is clay powder;

[0068] High-temperature roasting: Roast the mixed powder at a temperature of 600 °C, and the high-temperature roasting time is 1.0 h;

[0069] Plasma spraying process: Spray the roasted mixed powder on the surface of the ceramic base layer using a plasma spraying device to form a spray coating. The plasma spraying device is used;

[0070] Preparation of solidified layer: Add Na2O, K2O, MgO, CaO, Al2O3 and SiO2 into a ball mill according to a set ratio for ball milling. The contents of Na2O, K2O, MgO, CaO, and Al2O3 in the solidified layer are 6.2%, 10.0%, 16.0%, 15.0%, and 8.0% respectively, and the rest is SiO2. Then put the ball-milled mixed powder into a crucible for melting to make the mixed powder completely molten;

[0071] Quenching: Pour the completely molten mixed powder into cold water for quenching. Deionized water is used for the cold water during quenching, and the temperature of the cold water is 12 °C. It is quenched into a molten block, then broken and ball milled again. Then add the powder formed by ball milling into glycerol and wet mill it into a glaze slurry colloid;

[0072] Solidification: Coat the glaze slurry colloid on the surface of the spray coating, air dry it and then fire and solidify it to solidify the spray coating and form a solidified layer.

[0073] Control the thickness of the spray coating to be 0.30 mm and the thickness of the solidified layer to be 0.25 mm;

[0074] Mark this anti-fouling ceramic material as No. 3, detect its surface properties, and record them.

[0075] Example 4

[0076] The anti-fouling ceramic material disclosed in the present invention mainly includes a ceramic base layer and a spray coating;

[0077] Among them, the spray coating is sprayed on the surface of the ceramic base layer through a plasma process. The spray coating is a powder made by mixing Cr2O3, SiO2, TiO2, CuO and clay powder;

[0078] The contents of Cr2O3, SiO2, TiO2 and CuO in the spray coating are Cr2O3: 8.5%, SiO2: 25.5%, TiO2: 14.5%, CuO: 12.5% respectively, and the rest is clay powder;

[0079] As Figure 1 shown, prepare Cr2O3, SiO2, TiO2, CuO and clay powder, and process them according to the following steps:

[0080] Preparation of the ceramic base layer: Use clay to fire the ceramic base layer;

[0081] Preparation of the spray coating: Mix Cr2O3, SiO2, TiO2, CuO and clay powder evenly according to a set ratio to form a mixed powder. The contents of Cr2O3, SiO2, TiO2, CuO and clay powder are 5.2%, 17.2%, 9.2%, 10.2%, 58.2% respectively;

[0082] High-temperature roasting: Roast the mixed powder at a temperature of 600 °C, and the high-temperature roasting time is 1.0 h;

[0083] Plasma process spraying: Spray the roasted mixed powder on the surface of the ceramic base layer using a plasma spraying device to form a spray coating, and then air-dry and fire it into shape.

[0084] Control the thickness of the spray coating to be 0.30 mm;

[0085] Mark this anti-fouling ceramic material as No. 4, detect its surface performance, and record it.

[0086] Example Five

[0087] The anti-fouling ceramic material disclosed in the present invention mainly includes a ceramic base layer and a curing layer;

[0088] The curing layer is coated on the outside of the ceramic base layer. The curing layer is a colloid made by mixing Na2O, K2O, MgO, CaO, Al2O3 and SiO2;

[0089] The contents of Na2O, K2O, MgO, CaO, Al2O3 and SiO2 in the curing layer are Na2O: 6.2%, K2O: 10.0%, MgO: 16.0%, CaO: 15.0%, Al2O3: 8.0% respectively, and the rest is SiO2;

[0090] As Figure 1As shown, prepare Na2O, K2O, MgO, CaO, Al2O3 and SiO2, and process Cr2O3, SiO2, TiO2, CuO and clay powder according to the following steps:

[0091] Preparation of the ceramic base layer: Fire the clay to prepare the ceramic base layer;

[0092] Preparation of the solidification layer: Add Na2O, K2O, MgO, CaO, Al2O3 and SiO2 into a ball mill according to a set ratio for ball milling. The contents of Na2O, K2O, MgO, CaO, Al2O3 and SiO2 in the solidification layer are 3.2%, 5.0%, 8.0%, 10.0%, 5.0% and 58.8% respectively. Then put the ball-milled mixed powder into a crucible for melting to make the mixed powder completely molten;

[0093] Quenching: Pour the completely molten mixed powder into cold water for quenching. Deionized water is used for the cold water in quenching, and the temperature of the cold water is 12°C. Quench it into a molten block, then break it and ball mill it again. Then add the powder formed by ball milling into glycerin and wet mill it into a glaze slurry colloid;

[0094] Solidification: Coat the glaze slurry colloid on the surface of the ceramic base layer, air dry it and then fire and solidify it to form a solidified spray coating and a solidification layer.

[0095] Control the thickness of the solidification layer to be 0.25 mm;

[0096] Mark this anti-fouling ceramic material as No. 5, detect its surface performance and record it.

[0097] Regarding the change in the contact angle between the oil droplet and the surface of the ceramic material, the data detected in the above five examples are shown in the following table:

[0098]

[0099] As can be seen from the above table, after the oil droplet enters the water, most of the oil droplets in Example 1, Example 2 and Example 3 are separated from the surface of the ceramic material after 1 s. Among them, the separation rate of Example 2 is the best within 1.5 s, while the oil droplet separation effect in Example 4 and Example 5 is still poor after 2.0 s;

[0100] The surface free energy of the ceramic material is calculated by the OWRK method, and the dispersion component and polar component in the surface free energy are measured, as shown in the following table:

[0101]

[0102] According to the data in the above table, the ceramic materials prepared in Example 1, Example 2 and Example 3 have good surface gloss, smooth surface and high quality of the prepared ceramic materials.

[0103] The above has described an embodiment of the present invention in detail, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made in accordance with the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A preparation method of an anti-fouling ceramic material, characterized in that, It includes the following steps: Preparation of the ceramic base layer: firing the clay to prepare the ceramic base layer; Preparation of the sprayed coating: mixing Cr2O3, SiO2, TiO2, CuO and clay powder evenly according to a set ratio to form a mixed powder, where the contents of Cr2O3, SiO2, TiO2, CuO and clay powder are 5.2%, 17.2%, 9.2%, 10.2% and 58.2% respectively; High-temperature roasting: roasting the mixed powder at a temperature of 500°C - 800°C; Plasma spraying process: spraying the roasted mixed powder on the surface of the ceramic base layer using a plasma spraying device to form a sprayed coating; Preparation of the solidified layer: adding Na2O, K2O, MgO, CaO, Al2O3 and SiO2 into a ball mill according to a set ratio for ball milling, and then putting the ball-milled mixed powder into a crucible for melting to make the mixed powder completely molten; Rapid cooling: pouring the completely molten mixed powder into cold water for rapid cooling, quenching it into a molten block, then crushing it and ball milling it again, and then adding the powder formed by ball milling into glycerin for wet milling to form a glaze slurry colloid; Solidification: coating the glaze slurry colloid on the surface of the sprayed coating, air-drying it and then firing and solidifying it to solidify the sprayed coating and form a solidified layer.

2. The preparation method of an anti-fouling ceramic material according to claim 1, characterized in that, The time of the high-temperature roasting is 1.0 h - 2.0 h.

3. The preparation method of an anti-fouling ceramic material according to claim 1, characterized in that, In the rapid cooling, the cold water is deionized water, and the temperature of the cold water is 10°C - 15°C.

4. The preparation method of an anti-fouling ceramic material according to claim 1, characterized in that, The thickness of the sprayed coating is 0.30 mm - 0.35 mm, and the thickness of the solidified layer is 0.25 mm - 0.30 mm.

5. An anti-fouling ceramic material, characterized in that, This anti-fouling ceramic material is prepared by using the preparation method described in any one of claims 1 - 4. This anti-fouling ceramic material includes: A ceramic base layer; A sprayed coating, which is sprayed on the surface of the ceramic base layer by a plasma spraying process; A solidified layer; the solidified layer is coated on the outside of the sprayed coating; The sprayed coating is a powder made by mixing Cr2O3, SiO2, TiO2, CuO and clay powder; The solidified layer is a colloid made by mixing Na2O, K2O, MgO, CaO, Al2O3 and SiO2.

Images