A kind of ceramic repair material and ceramic repair method

Abstract

The invention discloses a ceramic repair material, the raw materials of which are composed by mass parts: 20-25 parts of 80-mesh-100-mesh kyanite, 24-30 parts of 180-mesh-250-mesh kyanite, and 12-15 parts of bottom glaze dry powder parts, 8-10 parts of albite, 10-18 parts of alumina, 5-15 parts of cryolite, 10-12 parts of kaolin, 5-6 parts of calcined kaolin and 0.5-2 parts of CMC dry powder. The invention also discloses a repairing method based on the above-mentioned ceramic repairing material, wherein the fluoride and steam generated by the decomposition of cryolite can greatly increase the decomposition rate of the kyanite when the reaction temperature is about 1180°C, the holding time can be shortened within 5 minutes, and the blue The volume expansion effect produced by the decomposition of spar is enough to completely offset the volume contraction of other raw materials, with good repairing effect, low energy consumption and high efficiency.

Description

technical field [0001] The invention relates to the technical field of post-processing of ceramics, in particular to a ceramic repair material and a ceramic repair method. Background technique [0002] The existing sanitary ceramic repair materials mainly use kyanite, sillimanite, andalusite, etc. with high temperature decomposition and expansion characteristics to reduce the volume shrinkage of other repair materials in the process of porcelainization under the action of flux, and add porcelain powder as filler at the same time. To reduce shrinkage, add primer powder to help. [0003] Due to the high temperature required for the complete decomposition of the above-mentioned kyanite and other materials (the nucleation temperature of kyanite mullite is 1150 °C, and the crystallization growth temperature is 1250 °C), and the decomposition reaction time is long, the corresponding sanitary ceramics The burn-back temperature needs to be higher. However, due to the demand for en...

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Problems solved by technology

However, due to the demand for energy saving and emission reduction and the consideration of enterprise costs, the overall glaze firing temperature of the sanitary ceramics industry is continuously decreasing. For defects such as crystallization, devitrification, and glaze flow at the trademark, many companies can only ensure the reaction time for the decomposition and expansion of kyanite in the repair material by prolonging the heat preservation time in the firing stage, so as to ensure that the shrinkage and depression of the repair part are small, These problems lead to high energy consumption, low efficiency and insufficient yield for burnback

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