Abstract
Effect of hydrothermal process on xonotlite crystal prepared from K2SiO3 and H2SiO3 respectively in CaO-SiO2-H2O system was researched in this paper. The crystal phase composition and morphology of the xonotlite crystal were analyzed using XRD and techniques. The results indicate that different hydrothermal process poses significant impact on the microstructure of xonotlite crystal. The xonotlite spherical particle with the diameter of 10-20 µm was prepared from H2SiO3 only via dynamic hydrothermal process. The xonotlite whisker prepared from K2SiO3 with the length of 20-40 μm, diameter of 400 nm and the aspect ratio of 50-100 was successfully prepared from K2SiO3 via dynamic hydrothermal process, while with the length of 5-10 μm, diameter of 500 nm and the aspect ratio of 10-20 via static hydrothermal process.
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