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Ceramic sintering antisticking coating, preparation method and application

A technology of anti-sticking coating and ceramics, which is applied in the field of ceramics, can solve the problems of low anti-sticking persistence of anti-sticking coatings, dusty and dirty ceramic parts, and affecting product quality. The effect of product defect rate

Inactive Publication Date: 2015-11-25
GUANGDONG SUNCOO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing anti-stick coating is generally a mixture of alumina, clay and water. Although it can prevent ceramic parts from sticking to the backing plate during high-temperature firing to a certain extent, there are still the following deficiencies: (1) the existing anti-stick coating The coating is easy to crack and fall off during the ceramic firing process, and it is easy to generate dust. When loading and unloading the ceramic parts, the ceramic parts will be dusty and dirty, which will affect the product quality; Low production efficiency

Method used

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  • Ceramic sintering antisticking coating, preparation method and application
  • Ceramic sintering antisticking coating, preparation method and application
  • Ceramic sintering antisticking coating, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0027] A kind of prescription of ceramic firing anti-stick coating, table 1:

[0028] Table 1 Coating formula (kg)

[0029]

[0030] Wherein, the flux is one or a combination of wollastonite and talc. Wollastonite and talc have a low coefficient of expansion and are more effective in fluxing when added.

Embodiment 6

[0032] A preparation method for ceramic firing anti-stick coating, comprising the following steps:

[0033] (1) prepare raw materials according to the formula described in embodiment 1-5;

[0034] (2) Add alumina, flux, clay and water to a ball mill, and ball mill to a 325 mesh sieve with 0.2% to 1.0% remaining;

[0035] (3) Add carboxymethyl cellulose and ball mill for 30 minutes to obtain coating 1-5.

[0036] In step (1), preferably ball milling to 325 mesh sieve remaining 0.4%.

[0037] The prepared coating 1-5 has a specific gravity of 1.45-1.70 g / cm 3 .

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Abstract

The invention belongs to the technical field of ceramics, and discloses a ceramic sintering antisticking coating, a preparation method and application. The coating is prepared from the following components in parts by weight: 40 to 65 parts of aluminum oxide, 30 to 55 parts of fluxing agent, 7 to 17 parts of clay, 0.2 to 1 part of carboxymethyl cellulose and an appropriate amount of water. The preparation method comprises the following steps: adding the aluminum oxide, the fluxing agent, the clay and the water into a ball mill, ball-milling to obtain 0.2 to 1.0 percent residue on a 325-mesh sieve, then adding the carboxymethyl cellulose, ball-milling for 30 minutes and obtaining the coating. Before ceramic sintering, pre-coating a base plate on which ceramic is placed with a layer of the coating can effectively prevent sticking. The ceramic sintering antisticking coating has the characteristics of reasonable coating formula, long antisticking duration, infrequent needs of coating, high production efficiency and effectively reduced cost. The ceramic sintering antisticking coating is applied in a process of sintering the ceramic, and has the advantages of difficulty in cracking and falling off and uneasiness in dusting, so ceramic ware is favorably kept clean and tidy, and the defective rate of products can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of ceramics, and in particular relates to a firing anti-stick coating for ceramics, a preparation method and an application thereof. Background technique [0002] The water absorption rate of the ceramic parts is not more than 0.5% after being fired and vitrified. In order to avoid defects caused by the ceramic parts sticking to the backing plate during the firing process, it is necessary to coat a layer of anti-sticking paint on the backing plate in advance. The existing anti-stick coating is generally a mixture of alumina, clay and water. Although it can prevent ceramic parts from sticking to the backing plate during high-temperature firing to a certain extent, there are still the following deficiencies: (1) the existing anti-stick coating The coating is easy to crack and fall off during the ceramic firing process, and it is easy to generate dust. When loading and unloading the ceramic parts, the ceramic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185
Inventor 温雪锋
Owner GUANGDONG SUNCOO TECH
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