Preparation of Cordierite-mullite Ceramics for Solar Thermal Storage
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2019年第5期
论文作者：吴建锋 陆成龙 XU Xiaohong ZHANG Yinfeng
文章页码：1062 - 1070
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.
吴建锋，陆成龙，XU Xiaohong，ZHANG Yinfeng
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology
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.
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