Structural Properties and Thermal Behavior of Li2CO3–BaCO3 System by DTA, TG and XRD Measurements
Structural Properties and Thermal Behavior of Li2CO3–BaCO3 System by DTA, TG and XRD Measurements
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通过 DTA、TG 和 XRD 测量 Li2CO3-BaCO3 体系的结构性能和热行为
DOI：
10.1023/a:1017929103300
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发表时间：
2001
影响因子：
4.4
通讯作者：
M. Rękas
中科院分区：
文献类型：
--
作者：
P. Pasierb;R. Gajerski;S. Komornicki;M. Rękas
采用差热分析（DTA）、热重分析（TG）和X射线物相分析等方法对Li 2CO 3-BaCO 3二元体系进行了研究。考察了碳酸盐组成和CO2分压对碳酸盐热行为的影响。结果表明，碳酸锂与碳酸钡不形成置换固溶体，但可能形成稀释间隙固溶体进行了讨论。在熔融温度以上，在TG曲线上观察到质量损失。这种损失是Li_2CO_3-BaCO_3体系中碳酸锂的分解和锂的蒸发共同作用的结果。随着周围气体中CO2浓度的增加，碳酸锂的分解速度变慢，熔点升高。
The binary system Li2CO3–BaCO3was studied by means of differential thermal analysis (DTA), thermogravimetry (TG) and X-ray phase analysis. The composition of carbonate and CO2partial pressure influence on the thermal behavior of carbonate were examined. It was shown that lithium carbonate does not form the substitutional solid solution with barium carbonate, however the possible formation of diluted interstitial solid solutions is discussed. Above the melting temperature the mass loss is observed on TG curves. This loss is the result of both decomposition of lithium carbonate and evaporation of lithium in Li2CO3–BaCO3system. Increase of CO2concentration in surrounding gas atmosphere leads to slower decomposition of lithium carbonate and to increase the melting point.