Preparation of ASZ Thermal Storage Ceramics for Solar Thermal Power Generation

摘要：

　　This paper aims to investigate the properties and microstructure ofAl2O3-SiC-ZrO2 (ASZ) composite ceramics for solar thermal power generation.The composite ceramics were prepared from α-A12O3, partially stabilized zirconia (Y2O35.2 wt%) and silicon carbide fired at 1280 ℃ for 2 h through pressureless sintering.Influence of the contents of SiC and ZrO2 on the performance of ASZ composite ceramics have been observed and extensively investigated via XRD, SEM, etc.The results revealed that the thermal shock resistance and high-temperature thermal properties would increase with the increase of the SiC content.No cracking occurred after 30 times thermal shock (from room temperature to 800℃ with air cooling) while the bending strength after thermal shock test, the thermal expansion coefficient, the heat capacity, the thermal conductivity coefficient and the thermal conductivity were 76.99MPa (with a growth rate of 27.89% after thermal shock), 5.85×10-6 ℃-1, 1.05 kJ·(kg.K)-1, 0.01 cm2.s-1, 2.26 W.(m·K)-1, respectively.The XRD patterns indicated that the main crystal phases included cortmdum, silicon carbide and zirconium silicate while the SEM images illustrated the well-grown crystal grains had the sizes distributed among 5-120 μm.

关键词： Al2O3-SiC-ZrO2 composite ceramics Silicon carbide Thermal properties Microstructure Solar thermal power generation

作者: Jian-feng Wu Bin-zheng Fang Xiao-hong Xu Peng Li Xin-bin LAO Shu-qing ZHENG

作者单位: State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 43 ARC Centre of Excellence for Functional Nanomaterials,Australian Institute of Bioengineering and Nan

会议类型: 国际会议

会议名称: 2012 China Functional Materials Technology and Industry Forum(2012中国功能材料科技与产业高层论坛)(CFMTIF2012)

会议地点: 昆明

会议语种:英文

页码: 44-51

在线出版日期: 2012-11-09（万方平台首次上网日期，不代表论文的发表时间）