Multi-temperature sintering method for ceramic

Abstract

The invention discloses a multi-temperature sintering method for ceramic. The method comprises the steps: pre-sintering a ceramic blank body, and coating colour ceramic glaze or transparent glaze on the surface of the blank body; and carrying out multi-high-temperature sintering molding, wherein the percentage content of quartz sand in the ceramic blank body is less than 35%, the colour ceramic glaze or transparent glaze is pre-fired for about 10 hours at the temperature of 800-1250 DEG C; during the multi-high-temperature sintering molding, from high to low, sintering temperature spans over 20-100 DEG C each time. In the multi-temperature sintering method for the ceramic, the blank material with low quartz sand percentage content is used, the calcined colour ceramic glaze or transparent glaze is coated on the surface of the blank body, and multi-high-temperature sintering temperature is controlled, and finally, a decorative ceramic pattern with diverse color levels and bright gloss is formed, and the decorative ceramic pattern does not has the problems of foaming, decoloring and cracking.

Description

technical field [0001] The invention relates to a method for manufacturing colored porcelain, in particular to a multi-temperature firing method for ceramics. Background technique [0002] According to different types, different performance requirements, and different shapes, sizes and thicknesses of products, ceramics have different manufacturing methods, but generally go through the following process: [0003] 1. Pre-firing the embryo body; 2. Coloring glaze or transparent glaze; 3. Grinding the surface of the embryo body; Pattern method" patent literature. [0004] The ceramics made by the above method are basically white. In order to form colors on the ceramics, ceramic colorants can be added to the mud, and after bisque firing, transparent glaze is applied and then glazed to make whole body colored porcelain. The color used in this method The dosage is large, the cost is greatly increased, and only one-color decoration can be realized. [0005] In order to form multi...

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Problems solved by technology

[0004] The ceramics made by the above method are basically white. In order to form colors on the ceramics, ceramic colorants can be added to the mud, and after bisque firing, transparent glaze is applied and then glazed to make whole body colored porcelain. The color used in this method The dosage is large, the cost is greatly increased, and only one-color decoration can be realized

[0005] In order to form multi-color glaze patterns, there are generally two methods: one is to add color to the embryo body that has been porcelained but not yet glazed. This method is simple to operate, but because the product has already been formed, the pattern is easy to fall off. The pattern layer is not rich enough, and the three-dimensional effect is poor; another method is to add color directly on the embryo body, which is difficult to master, because high-temperature firing is required after adding color, and the current number of high-temperature firing is generally 1 to 3 times , the color of the colored porcelain pattern is poor

In order to form colorful porcelain patterns with rich colors and bright colors, more high-temperature firings must be carried out, and the more firing times, the more difficult it is to control the firing temperature and expansion coefficient. discoloration, cracking

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