用石膏合成超细硫酸钙晶须的研究

RESEARCH OF THE PREPARATION OF ULTRAFINE CALCIUM SULPHATE WHISKERS USING GYPSUM

摘要: 以CaSO₄·2H₂O为原料,采用水热法合成了超细硫酸钙晶须。以电镜作为分析超细硫酸钙晶须直径的手段,得出制备超细硫酸钙晶须的最优工艺条件为:反应温度120℃、料浆初始pH值9.8～10.1、料浆浓度5%、原料粒度18.1μm。在此条件下,制备出了平均直径为0.19μm,长径比为98的超细硫酸钙晶须产品。

Abstract: Hydrothermal method was applied in the preparation of calcium sulfate whiskers in airtight reacor using CaSO₄·2H₂O as primary materials.The optimum conditions of preparation are as follows:temperature 120℃,pH value 9.8～10.1,concentration 5%,material size 18.1μm,which were determined by the analysis of the diameter of CaSO₄ whiskers through SEM.Under these conditions a product of ultrafine CaSO₄ whiskers with diameter of 0.19μm and aspect ration of 98 is obtained.