以分析纯试剂模拟粉煤灰预脱硅液，采用动态水热法合成硅酸钙晶须，研究了反应体系碱浓度、反应温度、反应时间、溶液中铝硅(Al2O3与SiO2)和钙硅(CaO与SiO2)质量比对产物物相组成及其形貌的影响. 结果表明，控制碱浓度80 g/L以下，反应温度220℃，反应时间6 h，铝硅质量比0.06以下，钙硅质量比0.9，可制备出纯度83%以上的硅酸钙晶须，晶须长度可达20 mm.

Calcium silicate whisker was prepared by dynamic hydrothermal method using analytical reagents to simulate desilication solution of coal combustion fly ash as raw material. The effects of Na2O concentration, reaction temperature, reaction time, mass ratio of alumina to silica and mass ratio of calcia to silica in the solution on phase composition and morphology of product were examined. The results revealed that calcium silicate whisker with the length over 20 mm and purity over 80% was synthesized under the conditions of Na2O concentration at 80 g/L, reaction temperature 220℃, reaction time 6 h, mass ratio of alumina to silica 0.06 and mass ratio of calcia to silica 0.9.