硫酸カリウムフラックスを用いた針状リューサイト結晶の合成

概要

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When a powder mixture consisting of Al_2(SO_4)_3, SiO_2 and K_2SO_4 was heated in a closed alumina crucible, a reactant mass remained at the bottom of the crucible. Needlelike leucite crystals were obtained by treating this reactant mass with hot HCl. The effect of the mixing ratio of the raw materials, tha heating temperature and the duration of heating at the selected temperature on the formation of needlelike leucite crystals was investigated. When a powder mixture, consisting of Al_2(SO_4)_3:SiO_2:K_2SO_4=1.0:2.8:1.9(molar ratio), was heated at 1200℃ for 3h, the obtained needlelike leucite crystals were 1-2 μm in length and 0.1-0.3 μm in width. Needlelike leucite crystals were formed by the crystallization of leucite on small mullite crystals obtained by heating, followed by growth of the leucite crystals in a liquid phase of the K_2SO_4 flux as the main component.
社団法人日本セラミックス協会の論文
2000-08-01