Chemical diffusion of oxygen in crushed single-crystal YBa2Cu3O7-δ investigated by thermogravimetry

被引：1
作者：
Zhang, YL
Yao, X
Zhang, H
Jin, YP
机构：
[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China
[3] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2004年 / 415卷 / 04期
基金：
中国国家自然科学基金;
关键词：
oxygen; diffusion; single-crystal; TSSG; thermogravimetry;
D O I：
10.1016/j.physc.2004.08.017
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The kinetics of oxygen in- and out-diffusion in the crushed YBa2Cu3O7-delta single-crystal prepared by the top-seeded solution-growth (TSSG) were studied by thermogravimetry. By fitting these experimental curves, the chemical in-diffusion coefficient in the temperature range from 375 to 475degreesC were determined as on the order of 10(-10) cm(2)/s for the samples with oxygen deficiencies delta < 0.1. The activation energy in the same samples was also determined as 1.04 +/- 0.10 eV. The out-diffusion exhibited similar kinetics behavior as in the in-diffusion process at a fixed oxygen partial pressure. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：203 / 208
页数：6
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