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CN-121758198-B - Laminated glaze, laminated glaze sanitary ceramic and preparation method thereof

CN121758198BCN 121758198 BCN121758198 BCN 121758198BCN-121758198-B

Abstract

The invention provides laminated glaze, laminated glaze sanitary ceramic and a preparation method thereof, wherein the laminated glaze comprises a basal layer, a middle layer and a surface layer, and the preparation method comprises the steps of respectively preparing basal layer glaze, middle layer glaze and surface layer glaze, and respectively ball-milling and sieving according to the proportion of water=1:1.5-2:0.5 to prepare basal layer glaze slurry, middle layer glaze slurry and surface layer glaze slurry; and glazing the glaze slip on the surface of the green body in sequence, and firing to obtain the laminated glaze. According to the invention, the glaze formula is improved, and the structure of the laminated glaze layer is formed on the surface of the green body, so that the transparent glaze layer is not required to be applied to the surface for protection, the fineness of glaze slurry of different components is not required to be controlled in a grading manner, polishing and grinding are not required, the glaze surface is smooth and flat, the process is simple, the sintering period is short, and the production cost is low.

Inventors

  • WANG BIN
  • WANG ZHILIANG
  • CHEN YONGQIANG
  • TANG XIAOYONG
  • WU XIAOBING
  • XU FAN

Assignees

  • 景德镇乐华陶瓷洁具有限公司
  • 景德镇乐华陶瓷洁具有限公司佛山研发分公司

Dates

Publication Date
20260508
Application Date
20260304

Claims (7)

  1. 1. The preparation method of the laminated glaze is characterized in that the laminated glaze comprises a basal layer, an intermediate layer and a surface layer, and comprises the following steps: S1, respectively preparing a basal layer, an intermediate layer and a surface layer glaze, wherein the glaze of the basal layer comprises, by weight, 5-15 parts of kaolin, 60-85 parts of clay, 3-8 parts of frit, 1-5 parts of dolomite, 1-5 parts of calcium fluoride and 2-5 parts of zirconium silicate, the glaze of the intermediate layer comprises, by weight, 1-5 parts of frit, 25-35 parts of quartz, 25-40 parts of albite, 1-5 parts of cryolite, 6-9 parts of kaolin, 0.2-1.0 part of zinc oxide, 8-15 parts of limestone, 3-8 parts of dolomite and 4-7 parts of zirconium silicate, and the glaze of the surface layer comprises, by weight, 5-10 parts of frit, 20-30 parts of quartz, 25-35 parts of albite, 5-10 parts of kaolin, 8-15 parts of zirconium silicate, 3-8 parts of dolomite, 12-20 parts of calcite, 1-3.5 parts of zinc oxide and 0.5-3 parts of corundum powder; s2, ball milling and sieving according to the proportion of glaze material: ball mill: water=1:1.5-2:0.5 respectively to obtain base layer, intermediate layer and surface layer glaze slip, wherein the glaze slip fineness of the laminated glaze is less than 10 mu m, and the proportion of particles is 70% -100%; and S3, glazing the glaze slip sequentially on the surface of the green body in sequence, and firing to obtain the laminated glaze.
  2. 2. The method for producing a laminated glaze according to claim 1, wherein the glazing conditions of the base layer are that the glazing speed is 2 to 5 pieces/minute, the air pressure is 0.4 to 0.8Mpa, the glazing pressure is 0.3 to 0.6Mpa, and the thickness of the base layer is 0.05 to 0.20mm.
  3. 3. The method according to claim 2, wherein the intermediate layer is glazed on the base layer at a glazing speed of 100-200 seconds/piece, a gas pressure of 0.4-0.8Mpa, a glazing pressure of 0.3-0.6Mpa, a thickness of the intermediate layer is 0.3-0.7mm, a glaze slurry of the surface layer is glazed on the glaze surface of the intermediate layer in a glazing manner of the intermediate layer, and a thickness of the surface layer is 0.1-0.5mm.
  4. 4. The method for producing a laminated glaze according to claim 1, wherein the fineness of kaolin in the base layer glaze is 400 to 700 mesh, and the fineness of dolomite is 800 to 1200 mesh.
  5. 5. A method of producing a laminated glaze according to claim 1, wherein the melting temperature of the frit in the glaze of the base layer, intermediate layer and surface layer is 1080 to 1250 ℃.
  6. 6. A method for preparing a laminated glaze sanitary ceramic, comprising a green body and a laminated glaze prepared by the preparation method according to any one of claims 1 to 5, wherein the laminated glaze is applied to the surface of the green body and fired to prepare the laminated glaze sanitary ceramic.
  7. 7. The method for preparing a laminated glaze sanitary ceramic according to claim 6, wherein the laminated glaze sanitary ceramic is prepared by drying the surface of the green body for 2-5 hours and firing the green body, wherein the firing schedule is that the green body is fired to 400-560 ℃ at the rate of 4-6 ℃ per minute, then is heated to 600-700 ℃ at the rate of 2-4 ℃ per minute, then is heated to 1180-1250 ℃ at the rate of 4-8 ℃ per minute, then is insulated for 40-50 minutes, is cooled to 500-600 ℃ at the rate of 5-8 ℃ per minute after being insulated for 40-50 minutes, and finally is cooled to 50-80 ℃ at the rate of 5-8 ℃ per minute through 3-5 hours.

Description

Laminated glaze, laminated glaze sanitary ceramic and preparation method thereof Technical Field The invention relates to the technical field of ceramics, in particular to laminated glaze, laminated glaze sanitary ceramics and a preparation method thereof. Background Glaze ripples and rugged phenomena are easy to occur in the production process of sanitary ceramics. The glaze ripple phenomenon is mainly caused by the over high density of glaze slurry, over high temperature during glazing, over slow glazing speed, over high temperature viscosity of glaze, obvious temperature difference in kiln and the like. Under the condition of too high glaze slurry density, the glazed layers are unevenly distributed to form wavy textures, and when the surface temperature of the green body is too high, the glazed surfaces are uneven. In addition, in the glazing process, if the glazing speed is too slow, sprayed glaze foggy points are rough, so that the surface of the glaze layer is uneven. Meanwhile, the viscosity of the glaze is too high at high temperature, so that the wettability and the fluidity of the glaze are affected, and the glaze is difficult to flatten. The temperature difference in the kiln is obvious, the melting temperature range of the glaze is narrower, under different fire conditions, the underfire can generate large scale-shaped ripples to influence the glossiness of the glaze surface, and the overfire can generate tiny scale-shaped ripples with small pinholes. This difference in the shape and influence of the waviness is also dependent on the atmosphere, for example, when the oxidized atmosphere fired glaze encounters a strong reducing atmosphere, the glaze flatness is deteriorated. In addition, the glaze is not uniformly distributed during firing, or the firing temperature is not high enough, which may cause minute undulation of the glaze surface, thereby generating a slight concave-convex feeling. In order to solve the problems, the prior art generally adopts the following methods of (1) calcining raw materials such as talcum, zinc oxide, aluminum oxide and the like in glaze, controlling the content of the raw materials within a reasonable range, reducing the specific gravity and high-temperature viscosity of the glaze slurry to inhibit the flow of the glaze, (2) glazing the glaze, increasing the thickness of a transparent glaze layer, and (3) finely polishing the transparent glaze layer in a polishing procedure by scraping and adopting a hard polishing mode, and finally removing the water ripple layer. The method increases the production cost, can not adapt the sanitary ceramic to high-temperature environment, and is difficult to produce sanitary ceramic with hard texture, smooth glaze and high temperature resistance. Therefore, the problems of reducing the production cost, reducing the ceramic glaze corrugation and concave-convex defects and realizing compact structure are the urgent problems to be solved in the current sanitary ceramic production process. Disclosure of Invention Therefore, the technical problem to be solved by the invention is to overcome the defects of high production cost, easy occurrence of glaze corrugation, concave-convex, low density and the like of sanitary ceramics in the prior art. Based on the above, the invention provides a laminated glaze, a laminated glaze sanitary ceramic and a preparation method thereof. The preparation method comprises the steps of preparing a base layer, a middle layer and a surface layer, respectively preparing a base layer glaze, a middle layer glaze and a surface layer glaze, ball milling according to the proportion of ball mill water=1:1.5-2:0.5 to obtain glaze slurry, sequentially glazing the glaze slurry on the surface of a blank body in sequence, and firing to obtain the laminated glaze, wherein the glaze of the base layer comprises, by weight, 5-15 parts of kaolin, 60-85 parts of clay, 3-8 parts of frit, 1-5 parts of dolomite, 1-5 parts of calcium fluoride and 2-5 parts of zirconium silicate, the glaze of the middle layer comprises, by weight, 1-5 parts of frit, 25-35 parts of quartz, 25-40 parts of albite, 1-5 parts of cryolite, 6-9 parts of kaolin, 0.2-1.0 part of zinc oxide, 8-15 parts of limestone, 3-8 parts of dolomite, 4-7 parts of zirconium silicate, and the surface layer comprises, by weight, 5-10 parts of corundum frit, 20-35 parts of quartz, 20-35 parts of sodium feldspar, 3-8 parts of dolomite, 3-5 parts of zircon powder, and 3-8 parts of zirconia powder. The calcium fluoride is added in the preparation of the basal layer glaze, and is mainly used as a fluxing agent and a color assisting agent, so that the glaze quality of the product is improved. Calcium fluoride is a typical compound, usually colorless crystals or white powder, and has one of its characteristics of being able to form eutectic with various metal oxides, and has a core role of reducing energy consumption in ceramic production and improving mechanical strength of c