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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
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
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
andalusite
thermal storage ceramic
in-situ formation
cordierite
thermal shock resistance
solar thermal power generation
