High-temperature high-grade magnesia porcelain preparation method

Abstract

The invention relates to a high-temperature high-grade magnesia porcelain preparation method, wherein the billet material comprises, by weight, 30-45% of burned talc, 20-35% of raw talc, 5-15% of feldspar, 10-18% of kaolin, 3-5% of bentonite, and 0-15% of quartz, and the glaze material comprises, by weight, 20-40% of feldspar, 5-15% of calcite, 4-8% of kaolin, 0-15% of quartz, 3-5% of ZnO, 0-5% ofBaCO3, and 20-35% of frit. According to the preparation method, billet material and glaze material preparation, molding, drying, biscuit firing of billet body, glazing, drying, and medium temperatureglaze burning to obtain the product, wherein the biscuit firing temperature is 1280-1300 DEGC, the thermal insulation is 30 min, the medium temperature glaze burning temperature is 1200 DEGC, and thethermal insulation is 30 min. According to the present invention, with the preparation method, the product with advantages of good glaze surface quality and high glossiness is obtained so as to achieve broad application prospects.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials (ceramics), and specifically relates to a preparation method of high-temperature high-grade magnesia porcelain. Background technique [0002] At present, most domestic high-temperature magnesia porcelain preparation methods adopt a one-time firing process, but due to the narrow firing temperature range of magnesia porcelain, it is difficult to control the temperature during the firing process. When the temperature is too high or the holding time is too long, it is easy to produce deformation defects. When the temperature is too low or the holding time is short, cracking defects are easy to occur. Therefore, in the current production process of medium-temperature magnesia porcelain, in order to expand the firing range, about 30% raw talc is often added. However, due to the one-time firing process, its During the firing process, more pinhole defects will be produced on the glaze surfa...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the domestic high-temperature magnesia porcelain preparation methods adopt a one-time firing process, but due to the narrow firing temperature range of magnesia porcelain, it is difficult to control the temperature during the firing process. When the temperature is too high or the holding time is too long, it is easy to produce deformation defects. When the temperature is too low or the holding time is short, cracking defects are easy to occur. Therefore, in the production process of medium-temperature magnesia porcelain, about 30% raw talc is often added in order to widen the firing range. However, due to the one-time firing process, its During the firing process, more pinhole defects will be produced on the glaze surface due to the decomposition of raw talc. In addition, due to the large expansion coefficient of the magnesia porcelain body, the expansion coefficient of the glaze must match it, and the glossiness of the glaze surface after one firing Poor and easy to produce pinhole defects, so the current preparation methods of high-temperature magnesia porcelain can no longer meet the needs of consumers, which seriously hinders the improvement of the quality of high-temperature magnesia daily-use ceramics