A kind of high mullite crystal phase ceramic slurry

Abstract

The invention provides high mullite crystal phase ceramic slurry which is prepared from the following raw materials in parts by weight: 5-10 parts of high sodium stone powder, 5-10 parts of alkalifeldspar, 15-20 parts of ball clay, 10-15 parts of Kaolin, 35-40 parts of illite clay, 11-15 parts of pyrophyllite, 1-5 parts of dolomite and 1-5 parts of waste ceramic powder. The invention aims at providing the high mullite crystal phase ceramic slurry which has the cracking resistance and high thermal shock resistance without using a water reducing agent, and the contents of the Kaolin and the pyrophyllite are increased; the Kaolin and the pyrophyllite are burnt to be directly converted to a mullite crystal phase, the illite weathered clay is lowered, the low-temperature fluxing high olafite is introduced, the content of the dolomite is increased to improve the rigidity of a green body, a glass phase is reduced, and the fluxing effect of calcium and magnesium elements is improved, so that fibrous crystal phase structures of the mullite, anorthite and the like are added, and the thermal shock resistance and the cracking resistance are improved.

Description

technical field [0001] The invention relates to the technical field of ceramic slurry, in particular to a high mullite crystal phase ceramic slurry. Background technique [0002] The existing slurry formula uses a large amount of raw materials such as illite and quartz. When fired at high temperature, the mullite crystal phase is not perfect, and the internal fibrous and network structure is less, while the glass phase is more, so the thermal shock resistance The reduction is obvious, and waste porcelain powder is not used, causing pollution to the environment. When a large amount of water reducing agent is used for dilution, the added water reducing agent and other additives are harmful to the environment, and the dryness migrates to the surface of the green body with water. A damaged layer is formed between the glaze slurry and the body, which reduces the bonding of the body and glaze, and produces a large number of surface defects when fired at high temperature, reducing ...

AI Technical Summary

Problems solved by technology

[0002] The existing slurry formula uses a large amount of raw materials such as illite and quartz. When firing at high temperature, the mullite crystal phase is not perfect, and the internal fibrous and network structures are less, while the glass phase is more, so the thermal shock resistance The reduction is obvious, no waste porcelain powder is used, which pollutes the environment. When a large amount of water reducing agent is used for dilution, the added water reducing agent and other additives are harmful to the environment, and the dryness migrates to the surface of the green body with water. A damaged layer is formed between the glaze slurry and the green body, which reduces the bonding of the green body glaze, and produces a large number of surface defects when fired at high temperature, reducing the yield of good products

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