EXPERIMENTAL-STUDY OF COPPER DIFFUSION IN YBA2CU3O7-X POLYCRYSTALS

被引：5
|
作者：
STRELKOV, AV
REBANE, YA
METLIN, YG
机构：
来源：
JOURNAL OF MATERIALS CHEMISTRY | 1993年 / 3卷 / 07期
关键词：
SPUTTERED NEUTRALS MASS SPECTROMETRY; COPPER; DIFFUSION COEFFICIENT; VOLUME DIFFUSION; GRAIN BOUNDARY;
D O I：
10.1039/jm9930300735
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The self-diffusion of copper in YBa2Cu3O7-x ceramics has been studied using sputtered neutrals mass spectrometry with isotopic marking. Diffusion profiles were formed by the annealing of (CuO)-Cu-63 thin films deposited on YBa2Cu3O7-x polycrystal substrates. The effective diffusion coefficient was calculated by an error-function approach. The parameters of the temperature dependence were found to be D0 = (2 +/- 0.2) +/- 10(-1) cm2 s-1 and E(a) = 240 +/- 9 kJ mol-1 in the temperature range 730-880-degrees-C. The application of Fisher's grain-boundary diffusion model made it possible to separate contributions of volume and boundary diffusion. The dependence of the copper diffusion coefficient in YBa2Cu3O7-x on P(O2) was investigated.
引用
收藏
页码：735 / 737
页数：3
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