2003 年 10 巻 303 号 p. 110-114
A continuous hydrothermal reactor was designed to prepare Xonotlite. It consisted of two pumps, a long thin tube to decrease pressure, and 5 autoclaves for dissolution of silica and calcium hydroxide, formation of Xonotlite, separation of solid from solution, and sampling. Xonotlite fibers up to 7μm were continuously prepared from the starting solutions of silica and calcium hydroxide by hydrothermal reaction at 250°C. The formation time was estimated to be 25 minutes. Xonotltite was crystallized without formation of any solid intermediate compounds.