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CN-120622961-B - Curved surface rock plate free of color change during secondary sintering and preparation method thereof

CN120622961BCN 120622961 BCN120622961 BCN 120622961BCN-120622961-B

Abstract

The application provides a curved rock plate which is not discolored by secondary sintering and a preparation method thereof, and the preparation method of the curved rock plate which is not discolored by secondary sintering comprises the steps of applying low-temperature transparent glaze to the surface of a planar rock plate prepared by sintering, wherein the raw materials of the low-temperature transparent glaze comprise glass powder, quartz powder, borax and transparent frit; and (3) drying the planar rock plate with the low-temperature transparent glaze, and performing hot bending firing on the dried planar rock plate to obtain the curved rock plate. According to the application, the low-temperature transparent glaze is applied to the surface of the planar rock plate subjected to primary firing, so that the low-temperature transparent glaze participates in the surface glaze layer reaction of the curved rock plate, and the surface crystallized glaze layer can be remelted in the low-temperature transparent glaze, or the low-temperature transparent glaze seals the surface glaze of the planar rock plate, so that the continuous crystallization of the glaze layer of the planar rock plate is prevented, the small color change of the whole curved rock plate is ensured, and the color consistency of the curved rock plate and the planar rock plate when the curved rock plate and the planar rock plate are paved together is ensured.

Inventors

  • YU HAILONG
  • HE CHENGXIU
  • LIN KEHUI
  • HUANG CAIWEI
  • YANG HANLING

Assignees

  • 广东东唯新材料有限公司
  • 东莞市唯美陶瓷工业园有限公司
  • 江西唯美陶瓷有限公司
  • 江西和美陶瓷有限公司
  • 马可波罗控股股份有限公司

Dates

Publication Date
20260512
Application Date
20250606

Claims (7)

  1. 1. The preparation method of the curved surface rock plate which is not discolored after twice firing is characterized by comprising the following steps of: applying low-temperature transparent glaze to the surface of the planar rock plate prepared by firing, wherein the raw materials of the low-temperature transparent glaze comprise glass powder, quartz powder, borax and transparent frit; Drying the planar rock plate to which the low-temperature transparent glaze is applied; performing thermal bending firing on the dried planar rock plate to obtain a curved rock plate; The low-temperature transparent glaze comprises, by mass, 40-50% of glass powder, 0-5% of quartz powder, 3-6% of borax and 40-60% of transparent frit; the chemical composition of the low-temperature transparent glaze comprises the following components in percentage by mass: SiO 2 40～50％、Al 2 O 3 1～6％、CaO 1～3％、MgO 0～1％、K 2 O 0～1％、Na 2 O 6～11％、ZnO 2～5％、BaO 6～10％、Li 2 O 0.5～3％、B 2 O 3 18～26％; The planar rock plate is prepared by ball milling, powder making, ageing, compression molding, glazing after drying, pattern spraying and sintering of raw materials for different blanks; The low-temperature transparent glaze participates in the surface glaze layer reaction of the curved-surface rock plate, the glaze layer crystallized on the surface of the planar rock plate can be remelted in the low-temperature transparent glaze, or the surface glaze of the planar rock plate is sealed by the low-temperature transparent glaze, so that the continuous crystallization of the glaze layer of the planar rock plate is prevented, and the surface of the planar rock plate is subjected to secondary sintering to obtain the effect consistent with the color before sintering.
  2. 2. The method for preparing the curved rock plate which does not change color after twice firing according to claim 1, wherein the chemical composition of the transparent frit comprises the following components in percentage by mass: SiO 2 35～44％、Al 2 O 3 1～4％、CaO 2～5％、MgO 0～1％、K 2 O 0～1％、Na 2 O 9～14％、ZnO 4～8％、BaO 10～16％、Li 2 O 3～6％、B 2 O 3 23～30％.
  3. 3. The method for preparing a curved rock plate without color change by twice firing according to claim 1, wherein the preparing step of the low-temperature transparent glaze comprises the following steps: And (3) mixing the raw materials of the low-temperature transparent glaze, adding water and carboxymethyl cellulose, performing ball milling, and obtaining the low-temperature transparent glaze, wherein the fineness of the glaze slurry of the low-temperature transparent glaze is less than or equal to 0.2 percent of the screen residue of 350 meshes.
  4. 4. The method for manufacturing a curved surface rock plate which does not change color by double firing according to claim 1, wherein applying a low temperature transparent glaze to the surface of the planar rock plate manufactured by firing comprises: The temperature of the planar rock plate prepared by firing is controlled to be 100-138 ℃ before the low-temperature transparent glaze is applied, the glazing specific gravity is 1.45-1.55, and the glazing quantity is 50-150 g/m 2 .
  5. 5. The method for manufacturing a curved surface rock plate which does not change color by double firing according to claim 1, wherein drying the planar rock plate to which the low temperature transparent glaze is applied comprises: And drying the planar rock plate to which the low-temperature transparent glaze is applied for 8-25 min at the drying temperature of 150-180 ℃.
  6. 6. The method for manufacturing a curved surface rock plate without color change by twice firing according to claim 1, wherein the step of performing the hot bending firing on the dried planar rock plate to obtain the curved surface rock plate comprises the following steps: And (3) feeding the dried planar rock plate into a pusher kiln, and sintering under the conditions of the sintering temperature of 850-970 ℃ and the sintering period of 6-8 hours and the oxidizing atmosphere to obtain the curved rock plate.
  7. 7. The curved surface rock plate is characterized by being prepared by the preparation method of the curved surface rock plate which is free from color change by twice firing according to any one of claims 1-6.

Description

Curved surface rock plate free of color change during secondary sintering and preparation method thereof Technical Field The invention relates to the technical field of ceramic production, in particular to a curved rock plate which is not discolored after twice firing and a preparation method thereof. Background Modern architectural decoration is not limited to simple planar paving, and one of the trends is to largely adopt architectural modeling of 'cambered surface rounded corners' instead of traditional 'planar right angle' modeling. The surface of a curved surface of a building, a round hall, a curved bar counter and the like, the diameter is generally from a few meters to tens of meters, the maximum processing diameter of natural stone is 2 meters, and the processing requirement of a large-diameter curved surface product is difficult to meet. The curved rock plate can solve the problems. The preparation process of the curved rock plate generally comprises the steps of sintering the curved rock plate once to obtain a plane semi-finished product, and then performing hot bending treatment on the plane semi-finished product to obtain the curved rock plate. If the formulation and process design of the base glaze, the ink-jet ink and the overglaze are improper in the preparation process, complex physicochemical reactions such as severe nucleation and crystallization can be caused to the blank, the glaze and the ink-jet ink layer singly or mutually in the hot bending treatment process, so that the patterns are subjected to color shift, tone loss and light color loss, pinhole miliaria, bubbles and the like can occur on the glaze surface when serious, and the normal product quality requirement cannot be met, namely, the color of the patterns after the hot bending treatment is inconsistent with the color before the hot bending treatment is easily caused. Accordingly, the prior art has drawbacks and needs to be improved and developed. Disclosure of Invention The invention aims to solve the technical problems that the color of a pattern is inconsistent with that of a plane semi-finished product before heat bending treatment in the prior art. The technical scheme adopted for solving the technical problems is as follows: An embodiment of a first aspect of the present application provides a method for preparing a curved rock plate without color change by twice firing, including: applying low-temperature transparent glaze to the surface of the planar rock plate prepared by firing, wherein the raw materials of the low-temperature transparent glaze comprise glass powder, quartz powder, borax and transparent frit; Drying the planar rock plate to which the low-temperature transparent glaze is applied; And (5) performing thermal bending firing on the dried planar rock plate to obtain the curved rock plate. According to the technical means, the low-temperature transparent glaze is applied to the surface of the planar rock plate subjected to primary sintering, so that the low-temperature transparent glaze participates in the surface glaze layer reaction of the curved rock plate, the glaze layer subjected to surface crystallization can be remelted in the low-temperature transparent glaze, or the surface glaze of the planar rock plate is sealed by the low-temperature transparent glaze, further, the glaze layer of the planar rock plate is prevented from being continuously crystallized, the overall color change of the curved rock plate is ensured to be small, namely, the surface of the planar rock plate is subjected to secondary sintering to obtain the effect consistent with the color before sintering, and the color consistency of the curved rock plate and the planar rock plate when the curved rock plate and the planar rock plate are paved together is ensured. In one embodiment of the application, the low-temperature transparent glaze comprises, by mass, 40-50% of glass powder, 0-5% of quartz powder, 3-6% of borax and 40-60% of transparent frit. According to the technical means, the low-temperature transparent glaze is applied to the surface of the planar rock plate, so that the surface glaze of the planar rock plate can be sealed, the planar rock plate cannot be crystallized continuously, and under the condition that the glazing amount of the low-temperature transparent glaze is large, the low-temperature transparent glaze participates in the reaction of the surface glaze of the planar rock plate due to the low temperature of the low-temperature transparent glaze, so that the color change of the planar rock plate after secondary sintering is not obvious. In one embodiment of the application, the chemical composition of the low-temperature transparent glaze comprises the following components in percentage by mass: SiO2 40～50％、Al2O3 1～6％、CaO 1～3％、MgO 0～1％、K2O 0～1％、Na2O 6～11％、ZnO 2～5％、BaO 6～10％、Li2O 0.5～3％、B2O3 18～26％. According to the technical means, in the chemical composition of the low-temperature transparent glaze, siO 2 for