Easy-to-clean daily-use ceramic and preparation method thereof

Abstract

The present invention belongs to the technical field of daily-use ceramics, and specifically relates to an easy-to-clean daily-use ceramic and a preparation method thereof. Preparation of a daily-use ceramic embryo body: weighing raw materials, ball milling, glazing to obtain a glazed daily-use ceramic embryo body, and heat-treating under specific process conditions to obtain an easy-to-clean daily-use ceramic. The easy-to-clean daily-use ceramic prepared by the present invention has excellent antibacterial and wear-resistant properties, and has relatively excellent surface gloss and flatness, and has good market application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of daily-use ceramics, and more specifically, relates to easy-to-clean daily-use ceramics and a preparation method thereof. Background Art

[0002] Ceramic products, whether they are building wall and floor tiles, sanitary ware, or daily-use ceramics such as plates and bowls, are closely related to people's lives. People will come into contact with a large number of ceramic products at home or in public places. However, these ceramics are generally humid, easy to be contaminated and breed bacteria, and cause disease transmission, which seriously endangers human health. With the general improvement of human material living standards and civilization, self-protection awareness is increasing. It is increasingly urgent to create a good ecological environment that reduces germs as much as possible. Therefore, the general use of antibacterial building sanitary ceramics, reducing the pollution of excrement and the cross-infection of public places are increasingly demanded, which provides a broad prospect for the development of antibacterial sanitary ceramics, and applies them to buildings, public places, family bathrooms and daily-use ceramics. Antibacterial ceramics generally add antibacterial agents to ceramic glazes, and the antibacterial glaze layer is fired to generate antibacterial tiles, sanitary ware and daily-use porcelain.

[0003] CN116751031A discloses an antibacterial daily-use ceramic cup and its preparation method. The antibacterial daily-use ceramic cup comprises a body layer, a bottom glaze layer and an antibacterial layer; the antibacterial layer is composed of the following raw materials: high-alumina bauxite, wollastonite, potassium feldspar, pyrophyllite, single-walled carbon nanotubes, nano-magnesium oxide, nano-zinc molybdate, and nano-titanium nitride. The antibacterial daily-use ceramic cup of the present invention first reduces the number of bacteria adhering to the ceramic cup by nano-titanium nitride, and then sterilizes through the interaction of single-walled carbon nanotubes, nano-magnesium oxide and nano-zinc molybdate. Among them: single-walled carbon nanotubes cause bacterial cell morphology to be distorted and cell membranes to be damaged to kill bacteria; nano-magnesium oxide generates peroxide ions by reacting with oxygen, and uses the strong oxidizing property of peroxide ions to kill bacteria; nano-zinc molybdate uses Zn 2+ The reaction with the thiol group causes the death of bacteria and sterilization; thus, the prepared ceramic cup has good antibacterial properties.

[0004] CN115490540A discloses an antibacterial ceramic and a method for preparing the same with enhanced antibacterial properties. The antibacterial agent is added to the ball-milled glaze in a proportion of 1-10wt% by external mixing, mixed evenly and sieved to obtain the antibacterial glaze; the dried or bisque-fired body is glazed, dried and fired in a kiln, and then soaked in an acid solution, an alkaline solution and clean water in sequence. On the one hand, the present invention can fully exert the antibacterial effect under the condition of low silver content and poor antibacterial effect by adding acid and alkali solution treatment, enhance the antibacterial properties of the ceramic, and greatly reduce the production cost; on the other hand, by adding ZnO to the antibacterial agent, the amount of silver used is reduced while still having excellent antibacterial properties, and the yellowing problem caused by the antibacterial agent on the ceramic surface is improved. The antibacterial glaze product prepared by the present invention can greatly reduce the cost, and the process is simple, easy to operate, and convenient for industrial production.

[0005] CN114195388A discloses an antibacterial and wear-resistant daily-use ceramic and its preparation method. The antibacterial and wear-resistant daily-use ceramic comprises a daily-use ceramic body and a glaze layer, and the glaze layer is made of the following raw materials in parts by weight: 35-45 parts of zircon sand; 15-20 parts of baddeleyite; 4-8 parts of magnesite; 2-6 parts of calcite; 1-3 parts of molybdenum powder; 2-4 parts of erbium oxide; 2-4 parts of neodymium oxide; 3-7 parts of zinc oxide; 3-7 parts of tungsten oxide; 2-4 parts of silver powder; 3-5 parts of sodium lignin sulfonate; 3-5 parts of sodium tripolyphosphate; 25-35 parts of water. The antibacterial and wear-resistant daily-use ceramic of the present invention has excellent wear resistance and antibacterial properties through the mutual coordination of components and the control of the preparation method.

[0006] In summary, adding antibacterial components to ceramics can significantly improve the comprehensive performance of daily-use ceramics, but the cost is relatively high. How to still have excellent antibacterial properties on the basis of reducing costs is an urgent problem to be solved. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects and deficiencies in the prior art and provide an easy-to-clean daily-use ceramic and a preparation method thereof. Preparation of daily-use ceramic embryos: weighing raw materials, ball milling, glazing to obtain glazed daily-use ceramic embryos, and heat treating under specific process conditions to obtain easy-to-clean daily-use ceramics. The easy-to-clean daily-use ceramics prepared by the present invention have excellent antibacterial properties and wear resistance, and the surface gloss and flatness are relatively excellent, and the market application prospects are good.

[0008] The purpose of the invention is to provide a method for preparing easy-to-clean daily-use ceramics.

[0009] Another object of the present invention is to provide a daily-use ceramic that is easy to clean.

[0010] The above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0011] A method for preparing easy-to-clean daily-use ceramics comprises the following steps:

[0012] 1) Preparation of daily-use ceramic embryos:

[0013] 2) Weigh potassium feldspar, sodium feldspar, quartz, lepidolite, diopside and water respectively by weight and place them in a ball mill and grind them;

[0014] 3) then adding zirconium oxide; nickel tungstate; chromium oxide co-doped with lanthanum, copper and nickel; zinc oxide; boric acid diglyceride fatty acid ester and naphthalenesulfonic acid formaldehyde condensate sodium salt into the ball mill and continuing ball milling to obtain a glaze;

[0015] 4) applying the glaze to the surface of the daily-use ceramic body in step 1), and drying naturally to obtain a glazed daily-use ceramic body;

[0016] 5) The glazed daily-use ceramic body is heated from room temperature to 120-160°C at a rate of 2-4°C / min and kept warm for 3-5h, then heated to 550-650°C at a rate of 5-7°C / min and kept warm for 5-7h in a nitrogen atmosphere, then heated to 800-900°C at a rate of 10-12°C / min and kept warm for 0.5-1.5h, then heated to 1250-1350°C and kept warm for 3-5h, then cooled to 900-1000°C, and the firing atmosphere is converted into a mixed gas of air and nitrogen, the volume ratio of air to nitrogen is 1:6-10, kept warm for 1-3h, then cooled to 600-700°C, and the volume of air and nitrogen is adjusted to 1:2-3; kept warm for 2-4h, then cooled to room temperature at a cooling rate of 3-6°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0017] According to a preferred technical solution, in step (1), the ball milling is performed at a ball milling speed of 150 to 250 r / min for 8 to 12 hours.

[0018] According to a preferred technical solution, in step (2), the ball milling is continued for 20 to 40 minutes.

[0019] The preferred technical solution is calculated by weight: the glaze layer includes the following components: 30-50 parts of potassium feldspar; 30-50 parts of sodium feldspar; 6-10 parts of quartz; 4-6 parts of lithium mica; 3-5 parts of diopside; 4-8 parts of zirconium oxide; 2-4 parts of nickel tungstate; 3-7 parts of chromium oxide co-doped with lanthanum, copper and nickel; 2-6 parts of zinc oxide; 4-6 parts of diglycerol borate fatty acid ester; 2-4 parts of sodium salt of naphthalenesulfonic acid formaldehyde condensate; and 35-45 parts of water.

[0020] A preferred technical solution, the preparation method of chromium oxide co-doped with lanthanum, copper and nickel comprises the following steps: dissolving lanthanum salt, copper salt, nickel salt, chromium salt and urea in deionized water, placing in a microwave reactor with a condensation reflux device for microwave reaction; naturally cooling to room temperature, filtering, washing, drying, then heat treating, cooling to room temperature, grinding, to obtain chromium oxide co-doped with lanthanum, copper and nickel.

[0021] In a further preferred technical solution, the lanthanum salt is at least one of lanthanum nitrate, lanthanum chloride, and lanthanum acetate; the copper salt is at least one of copper nitrate, copper chloride, and copper acetate; the nickel salt is at least one of nickel nitrate, nickel chloride, and nickel acetate; and the chromium salt is at least one of chromium nitrate, chromium chloride, and chromium acetate.

[0022] In a further preferred technical solution, the molar ratio of the lanthanum salt, copper salt, nickel salt, chromium salt and urea is 0.005-0.015:0.01-0.03:0.015-0.025:1:3-5.

[0023] In a further preferred technical solution, the microwave power is 450 W and the reaction time is 60 min.

[0024] In a further preferred technical solution, the drying is performed at 80-120° C. for 12-16 hours, and the heat treatment is performed at 700-900° C. for 3-5 hours.

[0025] The easy-to-clean daily-use ceramics are prepared based on the method for preparing the easy-to-clean daily-use ceramics described above.

[0026] The present invention has the following beneficial effects:

[0027] (1) The glossiness and smoothness of daily-use ceramics can be significantly improved by adding quartz, lepidolite and diopside to the raw materials of daily-use ceramics;

[0028] (2) The mechanical properties of daily-use ceramics are improved by adding zirconium oxide, and the antibacterial properties of daily-use ceramics are improved by compounding nickel tungstate, doped chromium oxide and zinc oxide.

[0029] (3) By controlling the calcination conditions, the doping modification of heteroatoms (N, B, etc.) was achieved, further modifying the antibacterial properties.

[0030] (4) The raw materials used in the present invention are low in price, the preparation process is simple, and the market application prospects are good. DETAILED DESCRIPTION

[0031] The present invention is further described below with reference to specific examples, but the examples do not limit the present invention in any form. Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0032] Naphthalenesulfonic acid formaldehyde condensate sodium salt: Tamol NH7519 produced by BASF.

[0033] Unless otherwise specified, all reagents and materials used in the following examples are commercially available.

[0034] Example 1

[0035] A method for preparing easy-to-clean daily-use ceramics comprises the following steps:

[0036] 1) Preparation of daily-use ceramic embryos:

[0037] 2) Weigh potassium feldspar, sodium feldspar, quartz, lepidolite, diopside and water respectively by weight and place them in a ball mill, and mill them at a ball mill speed of 200 r / min for 10 h;

[0038] 3) then adding zirconium oxide; nickel tungstate; chromium oxide co-doped with lanthanum, copper and nickel; zinc oxide; boric acid diglyceride fatty acid ester and naphthalenesulfonic acid formaldehyde condensate sodium salt into the ball mill and continuing ball milling for 30 minutes to obtain a glaze;

[0039] The glaze layer comprises the following components by weight: 40 parts of potassium feldspar; 40 parts of sodium feldspar; 8 parts of quartz; 5 parts of lepidolite; 4 parts of diopside; 6 parts of zirconium oxide; 3 parts of nickel tungstate; 5 parts of chromium oxide co-doped with lanthanum, copper and nickel; 4 parts of zinc oxide; 5 parts of boric acid diglyceride fatty acid ester; 3 parts of sodium salt of naphthalenesulfonic acid formaldehyde condensate; 40 parts of water;

[0040] The preparation method of the chromium oxide co-doped with lanthanum, copper and nickel comprises the following steps:

[0041] 0.01 mol lanthanum nitrate, 0.02 mol copper chloride, 0.02 mol nickel acetate, 1 mol chromium nitrate and 4 mol urea were dissolved in 200 mL deionized water, and placed in a microwave reactor with a condensation reflux device for microwave reaction; the microwave power was 450 W, and the reaction time was 60 min; naturally cooled to room temperature, filtered, washed, dried at 100° C. for 14 h, and then heat treated at 800° C. for 4 h, cooled to room temperature, and ground to obtain chromium oxide co-doped with lanthanum, copper and nickel;

[0042] 4) applying the glaze to the surface of the daily-use ceramic body in step 1), and drying naturally to obtain a glazed daily-use ceramic body;

[0043] 5) The glazed daily-use ceramic body is heated from room temperature to 140°C at a rate of 3°C / min and kept for 4 hours, then heated to 600°C at a rate of 6°C / min in a nitrogen atmosphere and kept for 6 hours, then heated to 850°C at a rate of 11°C / min and kept for 1 hour, then heated to 1300°C and kept for 4 hours, then cooled to 950°C, and the firing atmosphere is converted into a mixture of air and nitrogen, the volume ratio of air to nitrogen is 1:8, kept for 2 hours, then cooled to 650°C, and the volume of air and nitrogen is adjusted to 1:2.5; kept for 3 hours, and then cooled to room temperature at a cooling rate of 5°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0044] Example 2

[0045] A method for preparing easy-to-clean daily-use ceramics comprises the following steps:

[0046] 1) Preparation of daily-use ceramic embryos:

[0047] 2) Weigh potassium feldspar, sodium feldspar, quartz, lepidolite, diopside and water respectively by weight and place them in a ball mill, and mill them at a ball mill speed of 250 r / min for 8 h;

[0048] 3) then adding zirconium oxide; nickel tungstate; chromium oxide co-doped with lanthanum, copper and nickel; zinc oxide; boric acid diglyceride fatty acid ester and naphthalenesulfonic acid formaldehyde condensate sodium salt into the ball mill and continuing ball milling for 40 minutes to obtain a glaze;

[0049] The glaze layer comprises the following components by weight: 50 parts of potassium feldspar; 30 parts of sodium feldspar; 10 parts of quartz; 4 parts of lepidolite; 5 parts of diopside; 4 parts of zirconium oxide; 4 parts of nickel tungstate; 3 parts of chromium oxide co-doped with lanthanum, copper and nickel; 6 parts of zinc oxide; 4 parts of diglycerol borate fatty acid ester; 4 parts of sodium salt of naphthalenesulfonic acid formaldehyde condensate; 45 parts of water;

[0050] The preparation method of the chromium oxide co-doped with lanthanum, copper and nickel comprises the following steps:

[0051] 0.01 mol lanthanum nitrate, 0.02 mol copper chloride, 0.02 mol nickel acetate, 1 mol chromium nitrate and 4 mol urea were dissolved in 200 mL deionized water and placed in a microwave oven with a condensation reflux device.

[0052] The microwave reaction was carried out in a reactor; the microwave power was 450W, and the reaction time was 60min; the mixture was naturally cooled to room temperature, filtered, washed, dried at 100°C for 14h, and then heat treated at 800°C for 4h, cooled to room temperature, and ground to obtain chromium oxide co-doped with lanthanum, copper and nickel;

[0053] 4) applying the glaze to the surface of the daily-use ceramic body in step 1), and drying naturally to obtain a glazed daily-use ceramic body;

[0054] 5) The glazed daily-use ceramic body is heated from room temperature to 160°C at a rate of 4°C / min and kept for 3 hours, then heated to 650°C at a rate of 7°C / min in a nitrogen atmosphere and kept for 5 hours, then heated to 900°C at a rate of 12°C / min and kept for 0.5 hours, then heated to 1350°C and kept for 3 hours, then cooled to 1000°C, and the firing atmosphere is converted into a mixture of air and nitrogen, the volume ratio of air to nitrogen is 1:10, kept for 1 hour, then cooled to 700°C, and the volume of air and nitrogen is adjusted to 1:3; kept for 2 hours, then cooled to room temperature at a cooling rate of 6°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0055] Example 3

[0056] A method for preparing easy-to-clean daily-use ceramics comprises the following steps:

[0057] 1) Preparation of daily-use ceramic embryos:

[0058] 2) Weigh potassium feldspar, sodium feldspar, quartz, lepidolite, diopside and water respectively by weight and place them in a ball mill, and mill them for 12 hours at a ball mill speed of 150 r / min;

[0059] 3) then adding zirconium oxide; nickel tungstate; chromium oxide co-doped with lanthanum, copper and nickel; zinc oxide; boric acid diglyceride fatty acid ester and naphthalenesulfonic acid formaldehyde condensate sodium salt into the ball mill and continuing ball milling for 20 minutes to obtain a glaze;

[0060] The glaze layer comprises the following components by weight: 30 parts of potassium feldspar; 50 parts of sodium feldspar; 6 parts of quartz; 6 parts of lepidolite; 3 parts of diopside; 8 parts of zirconium oxide; 2 parts of nickel tungstate; 7 parts of chromium oxide co-doped with lanthanum, copper and nickel; 2 parts of zinc oxide; 6 parts of boric acid diglyceride fatty acid ester; 2 parts of naphthalenesulfonic acid formaldehyde condensate sodium salt; 35 parts of water;

[0061] The preparation method of the chromium oxide co-doped with lanthanum, copper and nickel comprises the following steps:

[0062] 0.01 mol lanthanum nitrate, 0.02 mol copper chloride, 0.02 mol nickel acetate, 1 mol chromium nitrate and 4 mol urea were dissolved in 200 mL deionized water and placed in a microwave oven with a condensation reflux device.

[0063] The microwave reaction was carried out in a reactor; the microwave power was 450W, and the reaction time was 60min; the mixture was naturally cooled to room temperature, filtered, washed, dried at 100°C for 14h, and then heat treated at 800°C for 4h, cooled to room temperature, and ground to obtain chromium oxide co-doped with lanthanum, copper and nickel;

[0064] 4) applying the glaze to the surface of the daily-use ceramic body in step 1), and drying naturally to obtain a glazed daily-use ceramic body;

[0065] 5) The glazed daily-use ceramic body is heated from room temperature to 120°C at a rate of 2°C / min and kept for 5 hours, then heated to 550°C at a rate of 5°C / min in a nitrogen atmosphere and kept for 7 hours, then heated to 800°C at a rate of 10°C / min and kept for 1.5 hours, then heated to 1250°C and kept for 5 hours, then cooled to 900°C, and the firing atmosphere is converted into a mixture of air and nitrogen, the volume ratio of air to nitrogen is 1:6, kept for 3 hours, then cooled to 600°C, and the volume of air and nitrogen is adjusted to 1:2; kept for 4 hours, then cooled to room temperature at a cooling rate of 3°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0066] Comparative Example 1

[0067] Except for step (5), the remaining steps and conditions are the same as those of Example 1, and step (5) is:

[0068] 5) The glazed daily-use ceramic body is heated from room temperature to 140°C at a rate of 3°C / min and kept for 4 hours, then heated to 600°C at a rate of 6°C / min in a nitrogen atmosphere and kept for 6 hours, then heated to 850°C at a rate of 11°C / min and kept for 1 hour, then heated to 1300°C and kept for 4 hours, then cooled to 950°C, the firing atmosphere is changed to air, kept for 2 hours, then cooled to 650°C and kept for 3 hours, then cooled to room temperature at a cooling rate of 5°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0069] Comparative Example 2

[0070] Except for step (5), the remaining steps and conditions are the same as those of Example 1, and step (5) is:

[0071] 5) The glazed daily-use ceramic body is heated from room temperature to 140°C at a rate of 3°C / min and kept for 4 hours, then heated to 600°C at a rate of 6°C / min in a nitrogen atmosphere and kept for 6 hours, then heated to 850°C at a rate of 11°C / min and kept for 1 hour, then heated to 1300°C and kept for 4 hours, then cooled to 950°C, and the firing atmosphere is converted into a mixture of air and nitrogen, the volume ratio of air to nitrogen is 1:8, kept for 2 hours, then cooled to 650°C, kept for 3 hours, and then cooled to room temperature at a cooling rate of 5°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0072] Comparative Example 3

[0073] Except for step (5), the remaining steps and conditions are the same as those of Example 1, and step (5) is:

[0074] 5) The glazed daily-use ceramic body is heated from room temperature to 140°C at a rate of 3°C / min and kept for 4 hours, then heated to 600°C at a rate of 6°C / min in a nitrogen atmosphere and kept for 6 hours, then heated to 850°C at a rate of 11°C / min and kept for 1 hour, then heated to 1300°C and kept for 4 hours, then cooled to 950°C, and the firing atmosphere is converted into a mixture of air and nitrogen, the volume ratio of air to nitrogen is 1:2.5, kept for 2 hours, then cooled to 650°C, kept for 3 hours, and then cooled to room temperature at a cooling rate of 5°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0075] Comparative Example 4

[0076] Except for step (5), the remaining steps and conditions are the same as those of Example 1, and step (5) is:

[0077] 5) The glazed daily-use ceramic body is heated from room temperature to 140°C at a rate of 3°C / min and kept for 4 hours, then heated to 600°C at a rate of 6°C / min in an air atmosphere and kept for 6 hours, then heated to 850°C at a rate of 11°C / min and kept for 1 hour, then heated to 1300°C and kept for 4 hours, then cooled to 950°C and kept for 2 hours, then cooled to 650°C and kept for 3 hours, then cooled to room temperature at a cooling rate of 5°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic.

[0078] Except for the differences in composition and content, the remaining steps and conditions of Comparative Examples 5-9 are the same as those of Example 1. The composition and content of Comparative Examples 5-9 are shown in Table 1:

[0079] Table 1

[0080]

[0081] The tribological properties of Examples 1 to 3 were tested using a ball-on-disc friction machine (HT-1000, Lanzhou Zhongke Kaihua Technology Development Co., Ltd.). The specific test results are shown in Table 2;

[0082] Table 2

[0083] Example 1 Example 2 Example 3 <![CDATA[Wear rate (×10 -5 )]]> 1.4 1.9 1.7

[0084] It can be seen from Table 1 that the easy-to-clean daily-use ceramics of the present invention have excellent wear resistance, and by observing the ceramics, the glossiness and flatness of the ceramics are very good.

[0085] The samples of Examples 1-3 and Comparative Examples 1-9 were placed in culture dishes of Escherichia coli, Staphylococcus aureus, and Candida albicans, respectively, to test the antibacterial rate, and each strain was cultured at 25° C. for 20 hours. The specific test results are shown in Table 3:

[0086] Table 3

[0087]

[0088]

[0089] It can be seen from Table 3 that the easy-to-clean daily-use ceramics prepared by the present invention have excellent antibacterial properties, and by comparing the embodiments with the comparative examples, it is found that the components of the present invention have a synergistic effect with each other, and it is precisely because of the interaction of the components that the daily-use ceramics of the present invention have good antibacterial properties and wear resistance, and the gloss and flatness of the daily-use ceramics of the present invention are very good.

[0090] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A method for preparing easy-to-clean daily-use ceramics, characterized in that: It includes the following steps: 1) Preparation of daily-use ceramic bodies; 2) Weigh potassium feldspar, sodium feldspar, quartz, lepidolite, diopside and water respectively by weight and place them in a ball mill and grind them; 3) then adding zirconium oxide; nickel tungstate; chromium oxide co-doped with lanthanum, copper and nickel; zinc oxide; boric acid diglyceride fatty acid ester and naphthalenesulfonic acid formaldehyde condensate sodium salt into the ball mill and continuing ball milling to obtain a glaze; 4) applying the glaze to the surface of the daily-use ceramic body in step 1), and drying naturally to obtain a glazed daily-use ceramic body; 5) The glazed daily-use ceramic body is heated from room temperature to 120-160°C at 2-4°C / min and kept for 3-5h, then heated to 550-650°C at 5-7°C / min and kept for 5-7h in a nitrogen atmosphere, then heated to 800-900°C at 10-12°C / min and kept for 0.5-1.5h, then heated to 1250-1350°C and kept for 3-5h, then cooled to 900-1000°C, and the firing atmosphere is converted into a mixed gas of air and nitrogen, wherein the volume ratio of air to nitrogen is 1:6-10, kept for 1-3h, then cooled to 600-700°C, and the volume of air and nitrogen is adjusted to 1:2-3; kept for 2-4h, then cooled to room temperature at a cooling rate of 3-6°C / min in an air atmosphere to obtain the easy-to-clean daily-use ceramic; By weight: the glaze layer includes the following components: 30-50 parts of potassium feldspar; 30-50 parts of sodium feldspar; 6-10 parts of quartz; 4-6 parts of lithium mica; 3-5 parts of diopside; 4-8 parts of zirconium oxide; 2-4 parts of nickel tungstate; 3-7 parts of chromium oxide co-doped with lanthanum, copper and nickel; 2-6 parts of zinc oxide; 4-6 parts of boric acid diglyceride fatty acid ester; 2-4 parts of naphthalenesulfonic acid formaldehyde condensate sodium salt; 35-45 parts of water; The preparation method of chromium oxide co-doped with lanthanum, copper and nickel comprises the following steps: dissolving lanthanum salt, copper salt, nickel salt, chromium salt and urea into deionized water, placing in a microwave reactor with a condensation reflux device for microwave reaction; naturally cooling to room temperature, filtering, washing, drying, and then heat treating, cooling to room temperature, grinding, and obtaining chromium oxide co-doped with lanthanum, copper and nickel; the molar ratio of the lanthanum salt, copper salt, nickel salt, chromium salt and urea is 0.005-0.015:0.01-0.03:0.015-0.025:1:3-5; the heat treatment is heat treating at 700-900°C for 3-5h.

2. The method for preparing an easy-to-clean daily-use ceramic according to claim 1, characterized in that: In step 2), the ball milling is performed at a ball milling speed of 150 to 250 r / min for 8 to 12 hours.

3. The method for preparing an easy-to-clean daily-use ceramic according to claim 1, characterized in that: In step 3), the ball milling is continued for 20 to 40 minutes.

4. The method for preparing an easy-to-clean daily-use ceramic according to claim 1, characterized in that: The lanthanum salt is at least one of lanthanum nitrate, lanthanum chloride, and lanthanum acetate; the copper salt is at least one of copper nitrate, copper chloride, and copper acetate; the nickel salt is at least one of nickel nitrate, nickel chloride, and nickel acetate; and the chromium salt is at least one of chromium nitrate, chromium chloride, and chromium acetate.

5. The method for preparing an easy-to-clean daily-use ceramic according to claim 1, characterized in that: The microwave power is 450W and the reaction time is 60min.

6. The method for preparing an easy-to-clean daily-use ceramic according to claim 1, characterized in that: The drying is performed at 80-120° C. for 12-16 hours.

7. Easy-to-clean daily-use ceramics prepared according to the method for preparing easy-to-clean daily-use ceramics according to any one of claims 1 to 6.

Images