Ceramic slurry having high firing finished product rate and used for grouting and preparation method thereof

Abstract

The invention relates to the technical field of grouting ceramics, and discloses ceramic slurry having high firing finished product rate and used for grouting. The problems that after existing slurryis poured into a complex mold, dehydration rates of different parts are different, the structure distribution in a blank body is not uniform, and cracks and even direct cracking are easily generated in the firing process are solved; the ceramic slurry is prepared by mixing the following raw materials in parts by mass: 5-8 parts of quartz, 5-8 parts of waste porcelain powder, 5-8 parts of kaolin, 32-35 parts of ball clay, 30-35 parts of calcined flint clay, 6-8 parts of silicon carbide, 20-30 parts of aluminum oxide and chromium oxide mixed powder and 35-42 parts of water, wherein the molar ratio of aluminum oxide to chromium oxide in the aluminum oxide and chromium oxide mixed powder is 0.9-1.1; when a green body obtained by slurry grouting is sintered, the aluminum oxide and chromium oxide mixed powder is firstly molten to form intermiscible eutectic which flows in gaps of the green body under the action of stress, so that the phenomenon of stress concentration is weakened, and the firing success rate of a finished product is increased. The invention further discloses a preparation method of the slurry, and the firing success rate of the finished product is increased.

Description

technical field [0001] The invention relates to the technical field of grouting ceramics, in particular to a high-firing ceramic slurry for grouting and a preparation method thereof. Background technique [0002] At present, the grouting method is also called the ceramic grouting molding method. The grouting method is a molding method in which the slurry is poured into a plaster mold to make it into a product. Therefore, the water in the part of the mud near the inner wall of the model is sucked by the porous gypsum to form a mud layer with the same shape as the inner wall of the model on the inner wall of the Shifen mold. This mud layer thickens with time. After stopping for a period of time, dump the excess mud, and the mud layer close to the inner wall of the Shifen model remains in the model; after a period of time, the mud layer naturally shrinks and separates from the model, and the formed rough billet take out. The grouting method is mainly suitable for batch moldin...

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Problems solved by technology

[0003] However, the problem of low firing efficiency often occurs in the actual production process of products with complex shapes. This is due to the complex shape of the product, the different dehydration rates of different parts after the slurry is injected into the mold, and the solid particles in the slurry are superimposed and attached to the wall of the green body. The different layers make the internal structure distribution of the green body uneven. During the firing process, when the stress caused by the internal expansion and contraction of some products is concentrated on the section of the hierarchical structure, the structural section of the green body becomes larger, causing cracks or even direct cracking.

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