DETERMINATION OF OXYGEN-CONTENT IN YBA2CU3O6.5+X

被引：2

作者：

BRUCKENSTEIN, S

WRONA, PK

机构：

[1] Department of Chemistry, State University of New York at Buffalo, Buffalo

来源：

ANALYTICA CHIMICA ACTA | 1990年 / 237卷 / 02期

关键词：

Oxygen; Superconductors;

D O I：

10.1016/S0003-2670(00)83946-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method for determining the oxygen content of the high-temperature superconductor YBa2Cu3O6.5+x is described. The superconductor is dissolved in 4.4 M hydrobromic acid, forming bromine. The mixture is then diluted with hydrochloric acid to obtain a solution of bromine and Cu(II) in 0.44 M hydrobromic acid and 1.1 M hydrochloric acid. As(III) is added in slight excess of that required to react with the bromine and the unreacted As(III) is determined by titration with potassium bromate. Oxygen does not interfere. The results of this method are in agreement with those of other iodimetric procedures. The dissolution of the superconductor in 4.4 M hydrobromic acid is much faster than in hydrochloric acid, the medium used in one iodimetric technique. YBa2Cu3O6.5+x sintered fibers and powder samples weighing from ca. 0.5 to 200 mg were analyzed for oxygen content. © 1990.

引用

页码：421 / 428

页数：8

共 15 条

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