太阳能热发电莫来石-硅酸锆复相陶瓷的原位合成及性能  

In-situ Preparation and Properties of Mullite-Zirconium Silicate Composite Ceramic for Solar Thermal Power

作　　者：吴建锋[1] 徐晓虹[1] 陈岭[1] 张梦琦[1] 马雄华[1] 徐瑜[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070

出　　处：《中国陶瓷工业》2013年第4期1-6,共6页China Ceramic Industry

基　　金：国家"973"计划资助项目(编号:2010CB227105)

摘　　要：以红柱石、ZrO2、苏州土和长石为主要原料,采用无压烧结制备了太阳能热发电用莫来石-硅酸锆复相陶瓷。研究了烧结温度对材料吸水率和力学性能的影响,采用空冷法研究了材料的热震性能,利用X射线衍射仪和扫描电子显微镜分析了复相陶瓷热震前后的物相组成和显微结构。结果表明:在1490℃烧结的最优样品A2吸水率为0.41%,气孔率为1.10%,体积密度为3.06 g/cm3,抗折强度达128.78MPa;复合材料有很好的热震性能,1100℃空冷热震损失率上升10.69%,可耐受30次以上热冲击,该复相陶瓷可作为潜在的太阳能热发电管道材料。A mullite-zirconium silicate composite ceramic as a solar thermal power generation material was fabricated by a pressureless sintering method with andalusite, ZrO2, Kaolin clay and feldspar as main raw materials. The effect of the sintering temperature on the sintering properties （i.e., bulk density, linear shrinkage rate and apparent porosity） and the mechanical properties were investigated. The thermal shock resistant property was characterized by air quench method. The phase composition and microstructure of the composite ceramics were analyzed by X-ray diffraction and scanning electron microscopy. The results show that the optimal sample sintered at 1490~C has the water absorption of 0.42%, the porosity of 1.10%, the bulk density of 3.06 g/ cm3 and the bending strength of 128.78 MPa. The composite ceramic has a superior thermal shock resistance. The bending strength loss rate can increase to 10.69% at 1100~C by air quenching-strength test, and the sample can endure 30 thermal shock cycles. This composite ceramic could be used as one of the potential solar thermal power heat transfer tube materials.

关 键 词：莫来石 硅酸锆 复相陶瓷 太阳能热发电 管道材料 

分 类 号：TM615[电气工程—电力系统及自动化]