Research on the characterization of a porcelainised material fabricated by adding a small amount of anorthite chamotte

摘要

The research aims to fabricate a porcelain with high strength and transmittance by adding a small amount of anorthite chamotte. The chamotte used in the research was compounded by quartz, calcite and alumina. The porcelain with best overall performance in the research has high flexural strength of 175 MPa, higher than that of bone china and hard porcelain, and has high transmittance of 6.2%/ 2 mm, higher than that of single phase anorthite ceramic. It was sintered at a temperature of 1280 degrees C and 12 wt% chamotte was added. Quartz was the primary crystalline phase in all samples, presenting mullite as minor crystalline phase. The trace of anorthite was observed in the fired samples when addition of chamotte was more than 9 wt%. It has been found that the addition of anorthite chamotte can promote uniform distribution of mullite, which can reinforce the flexural strength and transmittance of porcelain.