水合六硼酸钡的合成与热化学研究  

Synthesis and thermochemistry of hydrated barium hexaborate

作　　者：黄宏升[1] 李平[2] 

机构地区：[1]安康学院化学化工系,陕西安康725000 [2]陕西师范大学陕西省大分子科学重点实验室,化学与材料科学学院,陕西西安710061

出　　处：《化学研究与应用》2010年第2期194-197,共4页Chemical Research and Application

基　　金：国家自然科学基金(20871078)项目资助;安康学院科研专项计划(AYQDZR200707)资助

摘　　要：One new hydrated barium hexaborate has been prepared and identified by chemical analysis,X-ray diffraction(XRD),infrared spectral(IR) and thermal analysis(TG-DTG,DSC).The constitute of sample is BaB6O10·4.5H2O.The structure and thermal decomposition process of sample were studied.The molar enthalpies of solution of BaB6O10·4.5H2O in 1 mol·dm-3 HCl(aq)were measured in a series of experiments.With the incorporation of the previously determined enthalpy of solution of other substances in HCl(aq) and the standard molar enthalpies of formation of related substances,the standard molar enthalpies of formation of BaB6O10·4.5H2O was obtained.One new hydrated barium hexaborate has been prepared and identified by chemical analysis, X-ray diffraction（XRD）, infrared spectral（IR） and thermal analysis（ TG-DTG, DSC）. The constitute of sample is BaB6 O10· .4.5H2O. The structure and thermal decomposition process of sample were studied. The molar enthalpies of solution of BaB6O10.4.5H2O in 1 mol-dm^-3 HCl （aq）were measured in a series of experiments. With the incorporation of the previously determined enthalpy of solution of other substances in HCI（aq） and the standard molar enthalpies of formation of related substances, the standard molar enthalpies of formation of BaB6O10·4.5H2O was obtained.

关 键 词：六硼酸钡 热化学 标准摩尔生成焓 

分 类 号：O642.3[理学—物理化学]