摘要
通过差热／热重综合分析仪（DTA／TGA）测定ZnSO4·7H2O的失水过程，并对DTA，TG图谱进行分析。分析结果表明：在低温下（373K以下），水合盐先失液态水，由ZnSO4·7H2O分别失去1分子、5分子液态水，而生成ZnSO4·H2O。在高温下（513—553K），ZnSO4·H2O直接失去气态水，而生成ZnSO4。并从热力学理论上对ZnSO4·7H2O的脱水过程机理进行解释。
Differential thermal and thermogravimetric analysis instruments were applicated for the determination of dehydrate process of the Seven water zinc sulfate. Analysis of the diagram of TG/DTA of the dehydrate process indicated that at low temperature （ under 373 K ） the hydrated salt lost one and five molecules liquid water respectively to form ZnSO4 · H2O, and at high temperature（513K - 553k ） lost one vapor water molecule from one water zinc sulfate to form solid ZnSO4. The dehydrate mechanism of the hydrated salt ZnSO4 · 7H2O is explained by thermodynamics theory.
出处
《重庆师范大学学报（自然科学版）》
CAS
2006年第1期55-57,共3页
Journal of Chongqing Normal University:Natural Science
关键词
ZnSO4·7H2O
热重分析
差热分析
脱水过程
Seven water zinc sulfate
thermogravimetric analysis
differential thermal analysis
Dehydrate process
