The enthalpies of mixing of ternary liquid Ag-Ca-Ge alloys

IF 0.4 Q4 CHEMISTRY, ANALYTICAL French-Ukrainian Journal of Chemistry Pub Date : 2021-07-01 DOI:10.17721/fujcv9i1p51-62
N. Kotova, M. Ivanov, Natalia Usenko
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引用次数: 2

Abstract

Partial and integral enthalpies of mixing of the ternary Ag–Ca–Ge melts were determined for the first time by the high-temperature isoperibolic calorimetry at 1300–1550 K. The experiments were performed for six sections with a constant ratio of two components up to the molar fraction of the third component equal to 0.3. The enthalpies of mixing in this ternary system are exothermic values which increase in absolute value from the Ag corner of the concentration triangle towards the constituent binary Ca–Ge system. The minimum value of the integral enthalpy of mixing was obtained for Ca0.6Ge0.4 composition of the Ca–Ge binary system (about –58.00 kJ mol–1). The enthalpies of mixing of the ternary Ag–Ca–Ge melts are calculated for the whole concentration triangle by the Redlich-Kister-Muggianu method, taking into account the term of specific ternary interaction defined from our experimental data. The topology of the isoenthalpies of mixing is determined.
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三元液态Ag-Ca-Ge合金的混合焓
首次用高温等循环量热法在1300 ~ 1550 K范围内测定了Ag-Ca-Ge三元熔体的部分和积分混合焓。实验在两种组分的恒定比下进行,直到第三种组分的摩尔分数等于0.3。该三元体系的混合焓为放热值,其绝对值从浓度三角形的Ag角向二元Ca-Ge体系增加。在Ca-Ge二元体系中,Ca0.6Ge0.4组分的混合积分焓最小(约为-58.00 kJ mol-1)。考虑由实验数据定义的三元特定相互作用项,用Redlich-Kister-Muggianu方法计算了整个浓度三角形的Ag-Ca-Ge三元熔体的混合焓。确定了混合等焓的拓扑结构。
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来源期刊
French-Ukrainian Journal of Chemistry
French-Ukrainian Journal of Chemistry CHEMISTRY, ANALYTICAL-
自引率
0.00%
发文量
13
审稿时长
4 weeks
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