盐溶液和转晶剂对α-半水钛石膏晶体形貌的影响  

Influence of Crystal Modifier and Salt Solution on Crystal Morphology of α-Hemihydrate Titanium Gypsum

作　　者：雷芸[1] 陈禹成[1] 江莹[1] 姚建云[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《非金属矿》2013年第2期57-58,83,共3页Non-Metallic Mines

摘　　要：采用常压盐溶液法制备a-半水钛石膏，研究CaCh盐溶液质量分数对钛石膏生成a-半水石膏晶体形貌的影响，并考察乙二胺四乙酸（EDTA）掺量在0．05％～0．5％范围内时，洳半水钛石膏晶体形貌的改变。采用偏光显微镜观察石膏晶体形貌，x射线衍射仪对制得的半水石膏进行表征。结果表明，CaCl2溶液质量分数在15％-25％范围内，CaCl2溶液质量分数越大，形成的晶体尺度越小，长径比越小。控制EDTA掺量为0．2％，可以得到长径比接近1：1的短柱状a-半水石膏。a-Hemihydrate gypsum was prepared in salt solution under normal pressure. The influence of CaCl2 salt Solution concentration on crystal morphology of a-hemihydrate titanium gypsum was investigated. The crystal modifier was doped to change crystal morphology of a-hemihydrate titanium gypsum in the range of 0.05%-0.5% EDTA. The products were characterized by X-ray and observed on the polarizing microscope. The results showed that the size of the crystal became smaller with the higher CaCl2 concentration in the range of 15%-25%. With EDTA dosage of 0.2%, a-hemihydrate gypsum was prepared with aspect ratio closed to 1 ： 1.

关 键 词：钛石膏 Α-半水石膏 CaCl2盐溶液 EDTA 晶体形貌 

分 类 号：TQ177.373[化学工程—硅酸盐工业]