Antibacterial ceramic glaze and preparation method thereof

Abstract

The invention discloses antibacterial ceramic glaze and a preparation method thereof, relates to the technical field of ceramic glaze, and solves the problems that part of ceramic glaze is poor in antibacterial effect, the mechanical strength of the glaze surface is relatively low, and the production process is relatively tedious. The invention discloses antibacterial ceramic glaze and a preparation method thereof. The antibacterial ceramic glaze comprises the following components in parts by weight: 25-45 parts of potassium feldspar, 5-10 parts of nano yttrium-doped zirconium oxide, 3-10 parts of a lanthanide silver composite antibacterial agent, 7-25 parts of a fluxing agent, 1-7 parts of a wear-resistant reinforcing agent, 2-6 parts of an adhesive and 20-50 parts of deionized water. According to the invention, the nano yttrium-doped zirconium oxide and the lanthanide silver composite antibacterial agent are added into the glaze for cooperation, so that rare earth metals yttrium, lanthanum and silver in the glaze have a synergistic effect, the produced glaze can form a stable antibacterial phase at a high temperature, and meanwhile, the mechanical strength of the glaze surface is remarkably improved by the nano zirconium oxide.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic glazes, in particular to an antibacterial ceramic glaze and a preparation method thereof. Background Art

[0002] Ceramics are various products made from natural clay and various natural minerals through crushing, mixing, molding and calcining. In recent years, my country's daily-use porcelain industry has made great progress, and the output of daily-use porcelain is currently among the highest in the world. Since the microstructure of ceramic materials is composed of crystal phase, glass phase and pores, the final product has a porosity of 5% to 10% (volume). At the same time, the surface of ceramic materials has a certain lipophilicity. When pollutants come into contact with the surface of the product, due to the capillary action of the surface, part of the pollutants penetrate into the open pores; in addition, the microscopic unevenness of the ceramic surface also causes it to adhere to pollutants. Pollutants are basically composed of soluble colored inorganic or organic matter in water, usually acidic or alkaline, such as sewage, tea, dust, ink and organic oil in daily life, which pollute the ceramic surface and are difficult to remove, affecting cleanliness and appearance. Accumulated oil stains will become a breeding ground for bacteria. If not cleaned, the ceramics in the room will become a source of viral and bacterial infection.

[0003] Antibacterial ceramics are made by adding inorganic antibacterial agents to ceramic glazes. Currently, there are two major categories of inorganic antibacterial agents that are most widely studied and applied: one is silver-based antibacterial agents, such as various silver compounds, silver-loaded zeolites, silver-loaded phosphates, etc.

[0004] Some existing ceramic glazes have poor antibacterial effects, low mechanical strength of the glaze surface, and a relatively complicated production process; therefore, they do not meet existing needs. In this regard, we propose an antibacterial ceramic glaze and a preparation method thereof. Summary of the Invention

[0005] The purpose of the present invention is to provide an antibacterial ceramic glaze and a preparation method thereof, so as to solve the problems mentioned in the above background technology, such as poor antibacterial effect of some ceramic glazes, low mechanical strength of the glaze surface, and complicated production process.

[0006] To achieve the above object, the present invention provides the following technical solution: an antibacterial ceramic glaze and a preparation method thereof, comprising the following components in parts by weight:

[0007] 25-45 parts of potassium feldspar, 5-10 parts of nano-yttrium-doped zirconia, 3-10 parts of lanthanide silver composite antibacterial agent, 7-25 parts of flux, 1-7 parts of wear-resistant enhancer, 2-6 parts of adhesive, and 20-50 parts of deionized water.

[0008] Preferably, the following components are included in parts by weight:

[0009] 40 parts of potassium feldspar, 8 parts of nano-yttrium-doped zirconia, 6 parts of lanthanide silver composite antibacterial agent, 15 parts of flux, 5 parts of wear-resistant enhancer, 3 parts of adhesive, and 30 parts of deionized water.

[0010] Preferably, the co-solvent comprises at least one of the following components: borosilicate glass powder, borax and lithium carbonate.

[0011] Preferably, the wear-resistant enhancer comprises at least one of the following components: aluminum oxide, silicon carbide whiskers, and zirconium oxide.

[0012] Preferably, the binder comprises at least one of the following components: polyvinyl butyral, sodium carboxymethyl cellulose and aluminum phosphate.

[0013] A method for preparing an antibacterial ceramic glaze and a preparation method thereof comprises the following steps:

[0014] Step A: Ultrasonic dispersion of nano-yttrium-doped zirconium oxide and lanthanide silver composite antibacterial agent in ethanol for 30 to 40 minutes to form a uniform suspension;

[0015] Step B: adding deionized water, potassium feldspar, a solvent and a suspension liquid into a planetary ball mill, and ball milling is performed using zirconia as the grinding ball;

[0016] Step C: After the ball milling time is completed, the wear-resistant enhancer is added to the planetary ball mill again and the ball milling is continued to form a slurry, wherein the ball milling time is 0.5 to 1.5 hours, and the slurry fineness is controlled to be ≤5μm;

[0017] Step D: Adding a binder to the slurry to adjust the viscosity of the slurry, and then letting it stand for 24 hours to allow the components to fully react;

[0018] Step E: After waiting for the component reaction to be completed, a two-stage sintering method is used for shaping. The heating rate during sintering is 10°C / min. The first stage of sintering is pre-sintering at 850°C for 20 to 30 minutes, followed by a second stage of sintering, and a final sintering at 1200°C for 30 to 40 minutes. The product is cooled in the furnace to complete the preparation of the antibacterial ceramic glaze.

[0019] Preferably, the ball milling speed in step B is 400-600 rpm, and the ball milling time is 3-4 h.

[0020] Compared with the prior art, the preparation method of the present invention has the following beneficial effects:

[0021] The present invention adds nano-yttrium-doped zirconia and a lanthanide silver composite antibacterial agent to the glaze, so that the rare earth metals yttrium, lanthanum and silver therein act synergistically, so that the produced glaze can form a stable antibacterial phase at high temperature. At the same time, the nano-zirconia significantly improves the mechanical strength of the glaze surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A general flow chart for the overall preparation of the present invention;

[0023] Figure 2 The figure is a flow chart of ceramic glaze processing of the present invention. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] See also Figure 1 and Figure 2 The present invention provides an embodiment of an antibacterial ceramic glaze and a preparation method thereof, comprising the following components in parts by weight:

[0026] 25-45 parts of potassium feldspar, 5-10 parts of nano-yttrium-doped zirconia, 3-10 parts of lanthanide silver composite antibacterial agent, 7-25 parts of flux, 1-7 parts of wear-resistant enhancer, 2-6 parts of adhesive, and 20-50 parts of deionized water.

[0027] It comprises the following components in parts by weight:

[0028] 40 parts of potassium feldspar, 8 parts of nano-yttrium-doped zirconia, 6 parts of lanthanide silver composite antibacterial agent, 15 parts of flux, 5 parts of wear-resistant enhancer, 3 parts of adhesive, and 30 parts of deionized water.

[0029] The co-solvent comprises at least one of the following components: borosilicate glass powder, borax, and lithium carbonate.

[0030] The wear-resistant enhancer comprises at least one of the following components: aluminum oxide, silicon carbide whiskers, and zirconium oxide.

[0031] The binder comprises at least one of the following components: polyvinyl butyral, sodium carboxymethyl cellulose and aluminum phosphate.

[0032] A method for preparing an antibacterial ceramic glaze and a preparation method thereof comprises the following steps:

[0033] Step A: Ultrasonic dispersion of nano-yttrium-doped zirconium oxide and lanthanide silver composite antibacterial agent in ethanol for 30 to 40 minutes to form a uniform suspension;

[0034] Step B: adding deionized water, potassium feldspar, a solvent and a suspension liquid into a planetary ball mill, and ball milling is performed using zirconia as the grinding ball;

[0035] Step C: After the ball milling time is completed, the wear-resistant enhancer is added to the planetary ball mill again and the ball milling is continued to form a slurry, wherein the ball milling time is 0.5 to 1.5 hours, and the slurry fineness is controlled to be ≤5μm;

[0036] Step D: Adding a binder to the slurry to adjust the viscosity of the slurry, and then letting it stand for 24 hours to allow the components to fully react;

[0037] Step E: After waiting for the component reaction to be completed, a two-stage sintering method is used for shaping. The heating rate during sintering is 10°C / min. The first stage of sintering is pre-sintering at 850°C for 20 to 30 minutes, followed by a second stage of sintering, and a final sintering at 1200°C for 30 to 40 minutes. The product is cooled in the furnace to complete the preparation of the antibacterial ceramic glaze.

[0038] The ball milling speed in step B is 400-600 rpm, and the ball milling time is 3-4 h.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An antibacterial ceramic glaze, characterized in that: It comprises the following components in parts by weight: 25-45 parts of potassium feldspar, 5-10 parts of nano-yttrium-doped zirconia, 3-10 parts of lanthanide silver composite antibacterial agent, 7-25 parts of flux, 1-7 parts of wear-resistant enhancer, 2-6 parts of adhesive, and 20-50 parts of deionized water.

2. The antibacterial ceramic glaze according to claim 1, characterized in that: It comprises the following components in parts by weight: 40 parts of potassium feldspar, 8 parts of nano-yttrium-doped zirconia, 6 parts of lanthanide silver composite antibacterial agent, 15 parts of flux, 5 parts of wear-resistant enhancer, 3 parts of adhesive, and 30 parts of deionized water.

3. The antibacterial ceramic glaze according to claim 1, characterized in that: The co-solvent comprises at least one of the following components: borosilicate glass powder, borax and lithium carbonate.

4. The method for preparing an antibacterial ceramic glaze and a preparation method thereof according to claim 4, characterized in that: The wear-resistant enhancer comprises at least one of the following components: aluminum oxide, silicon carbide whiskers, and zirconium oxide.

5. The method for preparing an antibacterial ceramic glaze and a preparation method thereof according to claim 4, characterized in that: The binder comprises at least one of the following components: polyvinyl butyral, sodium carboxymethyl cellulose and aluminum phosphate.

6. A method for preparing an antibacterial ceramic glaze, characterized in that: The following steps are involved: Step A: Ultrasonic dispersion of nano-yttrium-doped zirconium oxide and lanthanide silver composite antibacterial agent in ethanol for 30 to 40 minutes to form a uniform suspension; Step B: adding deionized water, potassium feldspar, a solvent and a suspension liquid into a planetary ball mill, and ball milling is performed using zirconia as the grinding ball; Step C: After the ball milling time is completed, the wear-resistant enhancer is added to the planetary ball mill again and the ball milling is continued to form a slurry, wherein the ball milling time is 0.5 to 1.5 hours, and the slurry fineness is controlled to be ≤5μm; Step D: Adding a binder to the slurry to adjust the viscosity of the slurry, and then letting it stand for 24 hours to allow the components to fully react; Step E: After waiting for the component reaction to be completed, a two-stage sintering method is used for shaping. The heating rate during sintering is 10°C / min. The first stage of sintering is pre-sintering at 850°C for 20 to 30 minutes, followed by a second stage of sintering, and a final sintering at 1200°C for 30 to 40 minutes. The product is cooled in the furnace to complete the preparation of the antibacterial ceramic glaze.

7. The method for preparing an antibacterial ceramic glaze and a preparation method thereof according to claim 4, characterized in that: The ball milling speed in step B is 400-600 rpm, and the ball milling time is 3-4 hours.

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