四硼酸锂溶液体积性质  

Volumetric properties of aqueous lithium tetraborate solution

作　　者：盛莉莉 李积升[2,3] 戈海文 Sheng Lili;Li Jisheng;Ge Haiwen(Qinghai Province Research and Design Institute of Chemical Industry,Xining 810008,China;Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province)

机构地区：[1]青海省化工设计研究院有限公司,青海西宁810008 [2]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室 [3]青海省盐湖资源化学重点实验室

出　　处：《无机盐工业》2018年第10期33-35,41,共4页Inorganic Chemicals Industry

基　　金：国家自然科学基金(41506061)。

摘　　要：采用DMA 5000型振动管数字密度计测定在288.15~323.15 K范围内四硼酸锂溶液密度。通过热膨胀系数α定义计算溶液在不同浓度和温度下的热膨胀系数,通过密度与浓度关系计算溶液的表观摩尔体积ΦV和标准偏摩尔体积ΦV苓,并讨论了四硼酸锂溶液结构与浓度的关系。研究结果表明:四硼酸锂溶液热膨胀系数随浓度增加先增后减;表观摩尔体积和标准偏摩尔体积计算结果显示溶液存在强烈的溶质-溶剂和弱溶质-溶质相互作用。The density of the lithium tetraborate solution was measured using an Anton Paar DMA 5000 densitometer in the range of 288.15~323.15 K.The coefficient of thermal expansion(α)of the solution was calculated by the definition of the co-efficient of thermal expansion at different concentrations and temperatures.The apparent molar volume(ΦV)and the standard molar volume(Φα)of aqueous lithium tetraborate solution were calculated from the relationship between density and concen-tration.The relationship between the structure and concentration of lithium tetraborate solution was also discussed.Results sho-wed that the change trend of the thermal expansion coefficient of lithium tetraborate solution that firstly increased and then descended with the increasing of concentration.The apparent molar volume and standard partial molar volume calculation results showed the strong solute-solvent and weak solute-solute interactions existed in aqueous lithium tetraborate solution.

关 键 词：密度 热膨胀系数 表观摩尔体积 四硼酸锂 

分 类 号：TQ131.11[化学工程—无机化工]