Preparation and Performance of Andalusite Bonded SiC solar Heat-Absorbing Ceramics

摘要：

　　Using andalusite, SiC, Su Zhou Kaolin and Guang Xi quartz as materials, andalusite bonded SiC heat absorbing ceramic was prepared by pressureless firing in the ceramic preparation process.The influence of gradient SiC on microstructure and properties of the samples were studied.Using the testing technology of XRD, SEM, and etc., physical and chemical properties, phase composition and microstructure were tested and analysised.The results indicate that andalusite bonded SiC heat absorbing ceramic, which prepared to have a low firing shrinkage rote, high refractoriness and a good microstructure.The best firing temperature of the best formula C4 is 1460℃, firing expansion rate is 0.98%, bending strength is 32.52MPa, porosity is 30.74%, bulk density is 2.05g·cm-3, refractoriness is 1650℃,growth rate of oxidation weight is 2.769mg·cm-2 and have no crack after 30 times thermal shock.The bending strength has increased 11.15% after thermal shock.XRD analysis indicated that the main phase compositions are α-SiC, mullite and cristobalite.SEM studies show that there are many connected pores in the samples, the diameters of the pores are 10~20μm.Andalusite bonded SiC heat absorbing ceramic have a low firing expansion rate, high bending strength and good microstructure, which is suit for tower type solar thermal power generation.

关键词： Solar thermal power generation Heat absorbing ceramic materials Andalusite bonded silicon carbide Pressureless firing Microstructure and properties

作者: Jian-feng WU Meng LIU Xiao-hong XU ZHANG Ya-xiang Kun LI Guo-xia YI

作者单位: State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,P.R.China

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: 52-59

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）