Inorganic Chemicals Industry >

2019 , Vol. 51 >Issue 7: 48 - 50

DOI: https://doi.org/10.11962/1006-4990.2018-0455

Inorganic Chemicals Industry

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

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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 ℃.

Key words： CaB6O10·5H2O；phase transition；CaB6O10；CaB4O7

Cite this article

Shi Chunhui , Lü Pin , Huang Xia , Zhong Jianchu . Study on hydrothermal synthesis of CaB6O10·5H2O and its phase transition at high tempareture[J]. Inorganic Chemicals Industry, 2019 , 51(7) : 48 -50 . DOI: 10.11962/1006-4990.2018-0455

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