无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
无机盐工业

五水合六硼酸钙的水热合成及其高温相变研究

  • 施春辉 ,
  • 吕 品 ,
  • 黄 霞 ,
  • 仲剑初
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  • 1.辽宁省人民政府工业特种资源保护办公室,辽宁沈阳 110032;2.大连理工大学精细化工国家重点实验室,化工学院材料化工系
施春辉(1963— ),男,学士,高级工程师,主要从事硼镁资源化工研究与开发工作,已发表论文10余篇。

网络出版日期: 2019-08-23

Study on hydrothermal synthesis of CaB6O10·5H2O and its phase transition at high tempareture

  • Shi Chunhui ,
  • Lü Pin ,
  • Huang Xia ,
  • Zhong Jianchu
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  • 1.Liaoning Provincial Industrial Special Resources Protection Office,Shenyang 110032,China;2.State Key Laboratory of Fine Chemical;Department of Materials Science and Chemical Engineering,College of Chemical Engineering,Dalian University of Technology

Online published: 2019-08-23

摘要

在120 ℃的条件下,利用硼酸和石灰进行水热反应制备五水合六硼酸钙(CaB6O10·5H2O)。五水合六硼酸钙的差热分析结果显示,其脱水分4步,在800 ℃和900 ℃附近分别有一个相变放热峰和吸热峰。对五水合六硼酸钙的高温相变行为进行了探讨,化学分析、XRD、TG-DTA 和IR分析结果表明:在600 ℃时,首先发生晶态的五水合六硼酸钙向非晶态的无水六硼酸钙(CaB6O10)转化,至800 ℃时无定型的无水六硼酸钙转变为晶态的无水六硼酸钙,进一步升温至900 ℃时无水六硼酸钙分解为晶态的四硼酸钙(CaB4O7)和玻璃态的三氧化二硼。

本文引用格式

施春辉 , 吕 品 , 黄 霞 , 仲剑初 . 五水合六硼酸钙的水热合成及其高温相变研究[J]. 无机盐工业, 2019 , 51(7) : 48 -50 . DOI: 10.11962/1006-4990.2018-0455

Abstract

CaB6O10·5H2O was synthesized by hydrothermal method at 120 ℃ with using boric acid and lime as materials.The thermal analysis of CaB6O10·5H2O showed that CaB6O10·5H2O was dehydrated by 4 steps,one exothermic peak near 800 ℃ and one endothermic peak near 900 ℃ were found,respectively.The high temperature phase transition behavior of CaB6O10·5H2O was discussed by chemical analysis,XRD,TG-DTA and IR analysis.The results indicated that:the first crystalline CaB6O10·5H2O was converted to amorphous CaB6O10 at 600 ℃,and the amorphous CaB6O10 was converted to crystalline CaB6O10 at 800 ℃,and finally CaB4O7 and vitreous B2O3 were obtained by the decomposition of crystalline CaB6O10 at 900 ℃.
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