水热法合成超细硫酸钙晶须  

Preparation of Ultrafine Calcium Sulfate Whiskers by Hydrothermal Synthesis

作　　者：袁致涛[1] 王晓丽[1] 韩跃新[1] 印万忠[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第4期573-576,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50502011)

摘　　要：以CaSO4·2H2O为原料，采用水热法合成了超细硫酸钙晶须,以扫描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、料浆质量分数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．得出的结论对超细硫酸钙晶须的工业化生产具有重要的指导意义。Hydrothermal synthesis was applied to the preparation of ultrafine calcium sulfate whiskers in airtight reactor with gypsum as primary material. The optimum conditions for the preparation were that the reaction temperature is 120℃ and initial pH value of CaSO4·2H2O slurry is 9.8-- 10.1 with mass fraction 5 % and mean particle size 18.1μm, as a result of SEM to analyze the diameter of CaSO4 whiskers. Then, the ultrafine CaSO4 whiskers with average diameter 0.19μm and aspect ratio 98 were obtained. The conclusion drawn from the preparation will play a guiding role in the industrial production of ultrafine calcium sulfate whiskers.

关 键 词：水热合成 超细 石膏 硫酸钙晶须 

分 类 号：TD985[矿业工程—选矿]