SOLID-STATE CHEMISTRY OF HIGH-TC SUPERCONDUCTORS

被引：4

作者：

CHANG, EK

MEHTA, A

HONG, DJL

SMYTH, DM

机构：

[1] Materials Research Center, Bldg. 5 Lehigh University, Bethlehem

来源：

FERROELECTRICS | 1990年 / 102卷

关键词：

D O I：

10.1080/00150199008221490

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation of YBa2Cu3O6+y. for 0.2 < y < 1 is described by an equilibrium reaction that involves the filling of vacancies in the reference structure YBa2Cu3O7, and the creation of two hole species per added oxygen. The oxygen content as a function of temperature and oxygen partial pressure is accurately fit by a simple mass-action treatment of the oxidation reaction. The mass-action constants are independent of composition and are thermally activated with a single enthalpy of oxidation of -0.99 eV. The constancy of the thermodynamic parameters across this broad compositional range suggests that there is a considerable amount of order in what has been generally considered to be a disordered tetragonal structure. © 1990, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：309 / 317

页数：9

共 11 条

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[4]

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[8]

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[10] DEFECT MODEL AND TRANSPORT AT HIGH-TEMPERATURE IN YBA2CU3O6+Y [J].

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