Preparation of Cordierite-mullite Ceramics for Solar Thermal Storage  

作　　者：WU Jianfeng LU Chenglong 吴建锋;陆成龙;XU Xiaohong;ZHANG Yinfeng(State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology)

机构地区：[1]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2019年第5期1062-1070,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China(No.2018YFB1501002)

摘　　要：We developed cordierite-mullite composite ceramic materials to package and encapsulate PCM, and presented a preparation process from raw materials of kaolin, talc and alumina. The properties and microstructre of cordierite-mullite composite ceramic were studied. Due to the strengthening effects of mullite, the sample C2(80 wt% of cordierite and 20 wt % of mullite) sintered at 1 420 ℃ possessed excellent physical properties. Determined by X-ray diffraction(XRD), scanning electron microscope(SEM) and energy dispersive spectroscopy(EDS) analysis, cuboid-shaped cordierite crystals and needle-like or long quadrilateral-prism mullite crystals with staggered patterns were found, which endowed the composites preferable mechanical strength. After 30 cycles of thermal shock(room temperature to about 1 100 ℃, air-cooled), the sample presented superior thermal shock resistance, which is suitable to be applied as solar thermal storage materials.We developed cordierite-mullite composite ceramic materials to package and encapsulate PCM, and presented a preparation process from raw materials of kaolin, talc and alumina. The properties and microstructre of cordierite-mullite composite ceramic were studied. Due to the strengthening effects of mullite, the sample C2(80 wt% of cordierite and 20 wt % of mullite) sintered at 1 420 ℃ possessed excellent physical properties. Determined by X-ray diffraction(XRD), scanning electron microscope(SEM) and energy dispersive spectroscopy(EDS) analysis, cuboid-shaped cordierite crystals and needle-like or long quadrilateral-prism mullite crystals with staggered patterns were found, which endowed the composites preferable mechanical strength. After 30 cycles of thermal shock(room temperature to about 1 100 ℃, air-cooled), the sample presented superior thermal shock resistance, which is suitable to be applied as solar thermal storage materials.

关 键 词：SOLAR energy cordierite-mullite COMPOSITE CERAMICS properties and microstructure 

分 类 号：TB3[一般工业技术—材料科学与工程]