硅酸盐学报

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

作者：吴建锋冷光辉徐晓虹方斌正张亚祥李坤

分类号：

出版年,卷(期):页码：2012,40(7):962-969

DOI：

摘要：

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1400℃烧成的样品抗热震性能最佳：30次热震实验(热震条件：1100℃～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

Abstract: 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 1400℃ had a superior thermal shock resistance and optimum physical and chemical properties. This sample did not crack after thirty times thermal shock resistance tests (1100℃–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 α-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.

基金项目：

国家“973”计划(2010CB227105)资助项目

作者简介：

吴建锋(1963—)，男，博士，教授

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