{"title":"On the borothermic preparation of some vanadium, niobium and tantalum borides","authors":"P. Peshev, L. Leyarovska, G. Bliznakov","doi":"10.1016/0022-5088(68)90184-7","DOIUrl":null,"url":null,"abstract":"<div><p>The formation of vanadium, niobium and tantalum diborides by the reactions of V<sub>2</sub>O<sub>3</sub>, Nb<sub>2</sub>O<sub>5</sub> and Ta<sub>2</sub>O<sub>5</sub> with elemental boron under vacuum in the temperature range 1000 °–1750 °C has been investigated. It has been established that niobium and tantalum diborides with a composition close to that of stoichiometric NbB<sub>2</sub> and TaB<sub>2</sub> are obtained after a heat treatment of the reactants at 1650 °C for 1 h. Borothermic reduction of V<sub>2</sub>O<sub>3</sub> does not give a single-phase product but a mixture of VB<sub>2</sub> and VB.</p><p>A method for the chemical analysis of NbB<sub>2<sup>−</sup></sub> and TaB<sub>2</sub> samples has been proposed.</p></div>","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1968-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-5088(68)90184-7","citationCount":"57","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Less Common Metals","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0022508868901847","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 57
Abstract
The formation of vanadium, niobium and tantalum diborides by the reactions of V2O3, Nb2O5 and Ta2O5 with elemental boron under vacuum in the temperature range 1000 °–1750 °C has been investigated. It has been established that niobium and tantalum diborides with a composition close to that of stoichiometric NbB2 and TaB2 are obtained after a heat treatment of the reactants at 1650 °C for 1 h. Borothermic reduction of V2O3 does not give a single-phase product but a mixture of VB2 and VB.
A method for the chemical analysis of NbB2− and TaB2 samples has been proposed.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
