{"title":"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","authors":"","doi":"10.1016/j.solidstatesciences.2024.107731","DOIUrl":null,"url":null,"abstract":"<div><div>We have investigated the solid solution range of single phase La<sub>1-<em>x</em></sub><em>R</em><sub><em>x</em></sub>Rh<sub>3</sub>B (<em>R</em> = 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 <em>x</em> 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 <em>x</em> 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 <em>R</em>BO<sub>3</sub>, <em>R</em><sub>2</sub>O<sub>3</sub> and Rh are identified as oxidized products around <em>x</em> = 0.4 to 0.6 composition. The oxidation onset temperature, and weight gains due to the oxidation depend on the degree of substitution <em>x</em>. The behavior of crystallographic and physical/chemical properties in the present compounds La<sub>1-<em>x</em></sub><em>R</em><sub><em>x</em></sub>Rh<sub>3</sub>B strongly depend on the atomic size of the rare-earth atoms that form the cubic framework.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Phase stability of solid solution La1-xRxRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure\",\"authors\":\"\",\"doi\":\"10.1016/j.solidstatesciences.2024.107731\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>We have investigated the solid solution range of single phase La<sub>1-<em>x</em></sub><em>R</em><sub><em>x</em></sub>Rh<sub>3</sub>B (<em>R</em> = 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 <em>x</em> 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 <em>x</em> 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 <em>R</em>BO<sub>3</sub>, <em>R</em><sub>2</sub>O<sub>3</sub> and Rh are identified as oxidized products around <em>x</em> = 0.4 to 0.6 composition. The oxidation onset temperature, and weight gains due to the oxidation depend on the degree of substitution <em>x</em>. The behavior of crystallographic and physical/chemical properties in the present compounds La<sub>1-<em>x</em></sub><em>R</em><sub><em>x</em></sub>Rh<sub>3</sub>B strongly depend on the atomic size of the rare-earth atoms that form the cubic framework.</div></div>\",\"PeriodicalId\":432,\"journal\":{\"name\":\"Solid State Sciences\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-10-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Solid State Sciences\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1293255824002966\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid State Sciences","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1293255824002966","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
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。
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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