电动势法测定Cu2In2O5三元相形成的吉布斯自由能

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Journal of Mining and Metallurgy Section B-Metallurgy Pub Date : 2022-01-01 DOI:10.2298/jmmb220614030j

D. Jendrzejczyk-Handzlik, P. Handzlik

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引用次数: 0

摘要

在973 ~ 1372 K的温度范围内测定了固体氧化锆电解质Cu2O、CuO/O2-/空气Cu2In2O5、In2O3、Cu2O/O2-/空气In、In2O3/O2-/Ni、NiO的吉布斯自由能，以及In2O3和CuO氧化物的生成。利用本研究得到的结果，分别推导出由不同的氧化物生成三元化合物的反应的吉布斯自由能变化:2CuO + In2O3 = Cu2In2O5，等于:?Gf0,Cu2In2O5 = 33905 ?41.5 t(3600英镑)Jmol?根据第二定律sigma图，Cu2In2O5相的标准生成焓分别为-1211 (- 15)kJ mol-1和493.20 (- 10)J (K-1 mol-1)。还给出了Cu-In-O体系在两种温度下的氧势图。

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Gibbs free energy of formation of Cu2In2O5 ternary phase determined by E.M.F. method

Employing electrochemical cells with the solid zirconia electrolyte: Cu2O,CuO/O2-/air Cu2In2O5, In2O3,Cu2O/O2-/air In,In2O3/O2-/Ni, NiO Gibbs free energy of formation of solid Cu2In2O5 phase as well as that for In2O3 and CuO oxides was determined in the temperature range from 973 K to 1372 K. The results obtained in this study were used to derive Gibbs free energy change of the reaction of formation of the ternary compound from respective oxides: 2CuO + In2O3 = Cu2In2O5 which is equal to: ?Gf0,Cu2In2O5 = 33905 ? 41.50T (?3600) Jmol?1. Standard enthalpy of formation from elements ?H0f,298 and standard enthalpy ?S0298 derived for Cu2In2O5 phase by Second Law sigma plot are -1211 (?15) kJ mol-1 and 493.20 (?10) J (K-1 mol-1). Oxygen potential diagrams for the Cu-In-O system are also given at two temperatures.

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来源期刊

Journal of Mining and Metallurgy Section B-Metallurgy 工程技术-冶金工程

CiteScore

2.00

自引率

40.00%

发文量

审稿时长

2 months

期刊介绍： University of Belgrade, Technical Faculty in Bor, has been publishing the journal called Journal of Mining and Metallurgy since 1965 and in 1997 it was divided in two independent journals dealing with mining and metallurgy separately. Since 2009 Journal of Mining and Metallurgy, Section B: Metallurgy has been accepted in Science Citation Index Expanded. Journal of Mining and Metallurgy, Section B: Metallurgy presents an international medium for the publication of contributions on original research which reflect the new progresses in theory and practice of metallurgy. The Journal covers the latest research in all aspects of metallurgy including hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, solidification, mechanical working, solid state reactions, materials processing, surface treatment and relationships among processing, structure, and properties of materials.