原位生成堇青石结合红柱石太阳能热发电储热陶瓷的抗热震性能  

Thermal Shock Resistance of Cordierite in-situ Formed with Andalusite Thermal Storage Ceramics for Solar Thermal Power Generation

作　　者：吴建锋[1] 冷光辉[1] 徐晓虹[1] 方斌正[1] 张亚祥[1] 李坤[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《硅酸盐学报》2012年第7期962-969,共8页Journal of The Chinese Ceramic Society

基　　金：国家"973"计划(2010CB227105)资助项目

摘　　要：为提高储热陶瓷材料的抗热震性能,采用原位生成堇青石增强技术,以红柱石为主要原料,通过半干压成型,无压烧结研制了用于太阳能高温热发电红柱石储热陶瓷材料样品。研究了配方组成、烧成温度、相组成、微观结构对样品抗热震性能的影响。结果表明:红柱石添加量为70%,经1 400℃烧成的样品抗热震性能最佳:30次热震实验(热震条件:1 100℃～室温,风冷)的强度不仅没有损失,反而增加了26.20%。相组成和微观结构分析表明样品的晶相为堇青石、莫来石、硅线石、α-方石英、α-石英等,原位生成的堇青石晶体均匀分布在由红柱石转化的莫来石晶体之间,赋予样品较好的抗热震性能。In order to improve the thermal shock resistance of the thermal storage ceramic, cordierite was formed in-situ with andalusite as a main raw material by a semi-dry pressing and pressureless firing method. The result showed that the cordierite sample with andalusite of 70% fired at 1 400 ℃ had a superior thermal shock resistance and optimum physical and chemical properties. This sample did not crack after thirty times thermal shock resistance tests （1 100 ℃-room temperature, air cooling）. The bending strength was increased by 26.20%. It was indicated that the phase compositions of the sample were cordierite, mullite, sllimanite, cristobalite and a-quartz. The crystals of cordierite are distributed into the mullite crystals, showing a good thermal shock resistance. The ceramic of cordierite in-situ formed with andalusite could be used as a high temperature thermal storage ceramic for solar thermal power generation.

关 键 词：红柱石 储热陶瓷 原位技术 堇青石 抗热震性能 太阳能热发电 

分 类 号：TB321[一般工业技术—材料科学与工程]