硅酸盐学报Issue(4)：539-544,6.DOI:10.7521/j.issn.0454-5648.2014.04.19
添加剂辅助水热法制备硫酸钙晶须及生长机理研究
Additives-Assisted Hydrothermal Synthesis of Calcium Sulfate Whisker and Its Growth Mechanism
摘要
Abstract
The influence of additives (i.e.,magnesium chloride,citric acid,sodium dodecyl benzene sulfonate (SDBS)and so-dium oleate)on the growth behavior of calcium sulfate whisker synthesized with desulfurization gypsum by a hydrothermal process was investigated.The hydrothermal products obtained with or without additives are a half-water calcium sulfate whisk-er.However,the whisker obtained without additive appears short and thick.Magnesium chloride does not affect the growth of whisker,and citric acid inhibits the growth of whisker.SDBS plays a certain role on the promotion of whisker growth.The morphology of the product is inhomogeneous,and granular calcium sulfate appears.However,sodium oleate has a promoting effect on the growth of calcium sulfate whisker.Needle-like whiskers with 50-200μm in length and about 1μm in diameter are obtained.For the stabilization of the whiskers,calcining process was used to obtain insoluble anhydrous calcium sulphate whiskers.In addition,the promoting mechanism of the sodium oleate on the hydrothermal process of the whisker was also dis-cussed.关键词
水热法/添加剂/半水硫酸钙晶须/无水死烧硫酸钙晶须/生长机理Key words
hydrothermal method/additive/hemihydrate calcium sulfate whisker/insoluble anhydrous calcium sulfate whisker/growth mechanism分类
化学工程引用本文复制引用
杨娜,肖汉宁,郭文明..添加剂辅助水热法制备硫酸钙晶须及生长机理研究[J].硅酸盐学报,2014,(4):539-544,6.基金项目
国家自然科学基金(51302076)资助项目。 （51302076）
