摘要
以硫酸钙(分析纯)、磷石膏为原料,水热法制备硫酸钙晶须,实验考察了Fe3+对晶须性能的影响。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、透射电子显微镜(TEM)、选区电子衍射(SAED)、能量色散X射线光谱仪(EDX)等对产物进行表征。结果表明,Fe3+可促进硫酸钙晶须的轴向生长,有助于获得大长径比的硫酸钙晶须;当n(Ca)/n(Fe)=20左右时,硫酸钙(分析纯)制得晶须长径比达到最大值80,磷石膏制得晶须长径比为60;Fe3+可有效改善磷石膏水热制得晶须的形貌,抑制晶体的分叉生长,对磷石膏制得晶须白度也有一定程度的提高。
Calcium sulfate whiskers were prepared from commercial CaSO4·2H2O or phosphogypsum. The influence of Fe3＋ on properties of calcium sulfate whiskers were studied. The methods including scanning electron microscopy,X-ray powder diffraction,TEM,SAED and EDX were used for characterizing the resultant crystals. The crystals grew along the c-axis and the aspect ratio of calcium sulfate whiskers increased obviously with Fe3＋. When n（Ca）/n（Fe）=20,the aspect ratios of calcium sulfate whisker from commercial CaSO4·2H2O and phosphogypsum were up to 80 and 60 respectively. In the presence of Fe3＋,well-developed whiskers were attained from phosphogypsum and whiteness of calcium sulfate whiskers was improved.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2014年第1期165-168,共4页
Chemical Industry and Engineering Progress
关键词
硫酸钙
磷石膏
结晶
水热
形态学
calsium sulfate
phosphogypsum
crystallization
hydrothermal
morphology
作者简介
第一作者：吕鹏飞（1989-），男，硕士研究生。
联系人：费德君，副教授，主要从事化工新技术新工艺开发。E-mail：wwx-ffd@vip．sina．com。
