Thermal dehydration of dipotassium tetraborate tetrahydrate and crystallization of amorphous dehydration product

Koga  N; Utsuoka  T; Tanaka  H

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Thermal dehydration of dipotassium tetraborate tetrahydrate and crystallization of amorphous dehydration product

机译：Thermal dehydration of dipotassium tetraborate tetrahydrate and crystallization of amorphous dehydration product

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摘要

As one of the typical examples of producing an amorphous dehydration product, the thermal dehydration process of K(2)B(4)O(7)center dot 4H(2)O was subjected to thermoanalytical and morphological studies. An anhydrous glass was formed via three distinguished dehydration stages. The overall thermal dehydration process was characterized as a self-induced sol-gel process to form anhydrous glass. The as produced anhydrous glass exhibited glass transition at around 700 K and subsequently crystallized via two consecutive exothermic peaks at around 770 and 900 K. The final crystallization product, triclinic K2B4O7, melted at 1072 K.

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来源
《Journal of thermal analysis and calorimetry》 |2005年第1期|71-75|共5页
作者
Koga N; Utsuoka T; Tanaka H;
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作者单位

Hiroshima Univ, Grad Sch Educ, Chem Lab, Higashihiroshima 7398524, Japan;

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原文格式 PDF
正文语种英语
中图分类分析化学;
关键词
crystallization; dipotassium tetraborate tetrahydrate; glass formation; sol-gel process; thermal dehydration; LITHIUM DIBORATE GLASS; KINETICS; SOLIDS;

Thermal dehydration of dipotassium tetraborate tetrahydrate and crystallization of amorphous dehydration product

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