摘要
采用红外光谱分析、DTA、TG实验及静态加热失重等方法对贵州大方纤维状热液型坡缕石进行了研究。实验表明:坡缕石中存在四种类型的水,坡缕石脱水具有阶段性,<400℃加热处理不会破坏坡缕石的结构;结晶度高的热液型坡缕石热稳定性好,有序度高的纤维状坡缕石放热峰温度高;在常温到420℃范围内,坡缕石脱失吸附水和沸石水的反应活化能小,为0.62 kJ/mol,脱失结晶水的活化能大,为5.12 kJ/mol。
The fibrous and hydrothermal palygorskite from Dafang, Guizhou was studied with infrared（IR） spectra, differential thermal analysis （ DTA）, thermogravimetry （TG） and static TG. It was proved that there were four kinds of water in palygorskite. Palygorskite dehydration had phase, pyrogenation disposal didn＇ t destroy the structure of palygorskite below 400℃. Palygorskite with high crystal degree had good thermal stability, and palygorskite with high sequence degree had high exothermic peak. The reaction activation energy of dehydration absorbing water and zeolite water was 0.62 kJ/mol from room temperature to 420℃. The reaction activation energy of dehydrating crystal water was 5.12 kJ/mol.
出处
《矿产保护与利用》
2005年第5期13-16,共4页
Conservation and Utilization of Mineral Resources
基金
国家自然科学基金项目(项目编号:50464005)资助
关键词
贵州大方
坡缕石
红外光谱
热学性能
脱水
Dafang, Guizhou
palygorskite
infrared spectra
thermal characteristics
dehydration
