具有立方反超晶型结构的固溶体 La1-xRxRh3B(R = Gd、Lu 和 Sc)化合物的相稳定性

IF 3.4 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
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引用次数: 0

摘要

我们研究了具有立方反超晶型结构的单相 La1-xRxRh3B(R = Gd、Lu 和 Sc)化合物的固溶体范围。同时还研究了晶格参数、硬度和热重-差热分析(TG-DTA)的行为。在所有 La-Gd、La-Lu 和 La-Sc 系统中,立方反超晶相存在于 0.0 至 1.0 的整个成分范围 x 中。所有 La-Gd、La-Lu 和 La-Sc 系统的晶格参数和硬度都与 La 原子的替代程度 x 呈线性关系。TG-DTA 测量结果表明,这些化合物在空气中的氧化始于约 500-600 K。本化合物 La1-xRxRh3B 的晶体学行为和物理/化学特性在很大程度上取决于构成立方框架的稀土原子的原子尺寸。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Phase stability of solid solution La1-xRxRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure

Phase stability of solid solution La1-xRxRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure
We have investigated the solid solution range of single phase La1-xRxRh3B (R = Gd, Lu and Sc) compounds with a cubic anti-perovskite type structure. The behaviors of lattice parameters, hardness, and thermogravimetry–differential thermal analysis (TG-DTA) were also investigated. The cubic anti-perovskite phase exists over the entire composition range x from 0.0 to 1.0 for all La-Gd, La-Lu and La-Sc systems. Both the lattice parameters and the hardness in all La-Gd, La-Lu and La-Sc systems show a linear dependence on the degree of the substitution x of La atom. The results of TG-DTA measurements indicate that oxidation of the compounds in air begins at about 500–600 K. The mixed phases of RBO3, R2O3 and Rh are identified as oxidized products around x = 0.4 to 0.6 composition. The oxidation onset temperature, and weight gains due to the oxidation depend on the degree of substitution x. The behavior of crystallographic and physical/chemical properties in the present compounds La1-xRxRh3B strongly depend on the atomic size of the rare-earth atoms that form the cubic framework.
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来源期刊
Solid State Sciences
Solid State Sciences 化学-无机化学与核化学
CiteScore
6.60
自引率
2.90%
发文量
214
审稿时长
27 days
期刊介绍: Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.
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