乙酸乙酯对硫酸钙晶须结晶的影响

摘要

The half water calcium sulphate whisker was prepared by hydrothermal synthesis process with calcium sulfate as raw material. When ethyl acetate was used as addition agent, the effects of the temperature, the reaction time, ethyl acetate and the mass ratio of dihydrate calcium sulphate to water on crystallization of half calcium sulfate whisker were studied by using the method of orthogonal design. The results sho.red that the increase of the reaction temperature induced the decrease of the ratio of length to width of whisker, the ratio of length to width of whisker increased at first and then decreased with the reaction time, the ratio of length to width of whisker increased with increasing the mass ratio of dihydrate calcium sulphate to water, namely the decrease of concentration of solution, ethyl acetate led to crystal form of half water calcium sulphate whisker from slender corrugated to massive prismatic%以硫酸钙为原料，采用水热法合成了半水硫酸钙晶须；并采用正交设计的方法来分析乙酸乙酯作为添加剂时，各因素对半水硫酸钙晶须结晶的影响：温度、时间、乙酸乙酯及二水硫酸钙与水的质量比。结果表明：反应温度的升高使得晶须的长宽比降低，反应时间的延长使得晶须的长宽比先升高后降低，二水硫酸钙与水的质量比增大即料浆浓度的降低使得晶须的长宽比增大，乙酸乙酯使半水硫酸钙晶须的的晶形由细长的瓦楞状变为粗大的棱柱状。