Hydrothermal synthesis and thermodynamic properties of 2CaO·3B2O3·H2O

被引：0
|
作者：
Z. -H. Liu
H. -S. Huang
C. -F. Zuo
机构：
[1] Shaanxi Normal University,School of Chemistry and Materials Science
来源：
Journal of Thermal Analysis and Calorimetry | 2007年 / 89卷
关键词：
2CaO·3B; O; ·H; O; hydrothermal synthesis; solution calorimetry; thermodynamic properties;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
2CaO·3B2O3·H2O which has non-linear optical (NLO) property was synthesized under hydrothermal condition and identified by XRD, FTIR and TG as well as by chemical analysis. The molar enthalpy of solution of 2CaO·3B2O3·H2O in HCl·54.572H2O was determined. From a combination of this result with measured enthalpies of solution of H3BO3 in HCl·54.501H2O and of CaO in (HCl+H3BO3) solution, together with the standard molar enthalpies of formation of CaO(s), H3BO3(s), and H2O(l), the standard molar enthalpy of formation of −(5733.7±5.2) kJ mol−1 of 2CaO·3B2O3·H2O was obtained. Thermodynamic properties of this compound were also calculated by a group contribution method.
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页码：655 / 658
页数：3
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