Magnesia porcelain and preparation method thereof

Abstract

The invention discloses a magnesia porcelain and a preparation method thereof. The magnesia porcelain is prepared by using a billet material and a glaze material, wherein the billet material comprisesthe following components in percentage by weight: 30-45% of burnt 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 sum of the weight percentages of the components is 100%; and the glaze material comprises the following components in percentage by weight: 20-40% of feldspar, 5-15% of calcite, 4-8% of kaolin, 0-15% of quartz, 3-5% ZnO, 0-5% of BaCO3 and 20-35% of glass frit, and the sum of the weight percentages of the components is 100%. According to the magnesia porcelain, the quality of the glaze surface is good, the glossiness ishigh, the raw material cost is low, and the production process is simple.

Description

technical field [0001] The invention relates to a magnesia porcelain and a preparation method thereof. Background technique [0002] At present, most of the domestic medium-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, and deformation defects are prone to occur when the temperature is too high or the holding time is too long , when the temperature is too low or the holding time is short, it is easy to produce cracking defects. Therefore, in the current production process of medium-temperature magnesia porcelain, in order to widen 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 surface due to the decomposition of raw talc. In addition, due to the large expansion coefficie...

AI Technical Summary

Problems solved by technology

[0002] At present, most domestic medium-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, and deformation defects are prone to occur when the temperature is too high or the holding time is too long , when the temperature is too low or the holding time is short, it is easy to produce cracking defects. Therefore, in the current production process of medium-temperature magnesia porcelain, in order to widen 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 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 gloss of the glaze surface after one firing Therefore, the current preparation method of medium-temperature magnesia porcelain can no longer meet the needs of consumers, which seriously hinders the improvement of the quality of medium-temperature magnesia daily-use ceramics