YUAN Qiuwen, CHEN Wei, DENG Tengfei
(State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, Hubei, China)
Abstract: Lightweight porcelain was prepared with gold tailings as the primary raw material. Meanwhile, glass powders and high-alumina solid waste were used as the high-temperature binder and reinforcing agent, respectively. The effects of sintering temperatures and content of gold tailings on phase composition, physical properties and microstructure of the lightweight porcelain were studied. Specifically, water absorption, bending strength, bulk density and apparent porosity of the lightweight porcelain prepared at sintering temperature of 1030 ℃ with 85 wt.% gold tailing are 17.01%, 32.23 MPa, 1.79 g·cm−3 and 29.66%, respectively, which are close to the performance of the traditional lightweight porcelain. Main phases of the gold tailings-based light porcelain are quartz, anorthoclase and augite. In addition, bonding properties of the gold tailing-based lightweight porcelain body and glazes were explored. Linear expansion coefficient of the ceramic body was a little higher thanthat of the glaze. The bonding strengths of blanks and glazes are excellent. The bending strength of sample with 85 wt.% gold tailings fired at 1030 ℃ after glazed was 50.59 MPa.
Key words: gold tailings; lightweight porcelain; binding property between the body and glaze