化学学报 ›› 1993, Vol. 51 ›› Issue (6): 550-555. 上一篇    下一篇

研究论文

水合草酸钡脱水过程的机理判别和动力学研究

李靖华;张宁;成庆堂   

  1. 河南师范大学化学系
  • 发布日期:1993-06-15

Identification of mechanism and investigation on the kinetics of thermal dehydration of barium oxalate hemihydrate

LI JINGHUA;ZHANG NING;CHENG QINGTANG   

  • Published:1993-06-15

用等温热重法和线性升温热重法在氮气气氛中研究B~aC~2O~4·0.5H~2O的脱水过程.运用判断机理的三步判别法对实验数据分析证明:该过程受随机成核和晶核随后生长机理控制.通过晶体结构分析对这种机理的正确性进行了验性.

关键词: 晶体结构测定, 反应动力学, 晶体生长, 水合物, 脱水, 热重分析, 草酸钡, 等温试验法, 线性升温试验法

Thermal decomposition of Ba(C2O4).0.5H2O was studied by TG in dry N2 flow at constant temperature dependence of and with linearly increasing temperature The process is dominated by the random nucleation and subsequent linear growth process. Anal. of the crystal changes agrees with this conclusion.

Key words: CRYSTAL STRUCTURE DETERMINATION, REACTION KINETICS, CRYSTAL GROWTH, HYDRATE, DEHYDRATION, THERMOGRAVIMETRY, BARIUM OXALATE

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