热分解
热重分析
分解
氧化剂
惰性气体
化学
硫酸盐
氮气
试剂
无机化学
惰性
差热分析
热解
热分析
氧气
分析化学(期刊)
衍射
热的
物理化学
环境化学
有机化学
气象学
物理
光学
作者
P. K. Gallagher,David W. Johnson,F. Schrey
标识
DOI:10.1111/j.1151-2916.1970.tb12038.x
摘要
Conventional thermogravimetry, differential thermal analysis, and evolved gas analysis were used to study the thermal decomposition of reagent-grade FeSO4·7H2O and of freeze-dried FeSO4·H2O in oxidizing and inert atmospheres. The mechanism depends on the atmosphere but is the same for the freeze-dried and conventional materials. In oxygen, iron(II) is converted to iron(III) before the sulfate ion decomposes, whereas in nitrogen this conversion occurs simultaneously with the first step of the sulfate decomposition. The presence of moisture lowers the decomposition temperature. Moess-bauer spectroscopy, X-ray diffraction data, and surface area measurements substantiated the proposed decomposition schemes.
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