THE OXYGEN PERMEATION THROUGH YBA2CU3O6+X

被引：24
作者：
PATRAKEEV, MV
LEONIDOV, IA
KOZHEVNIKOV, VL
TSIDILKOVSKII, VI
DEMIN, AK
NIKOLAEV, AV
机构：
[1] RUSSIAN ACAD SCI,INST SOLID STATE CHEM,PERVOMAISKAIA 91,620219 SVERDLOVSK,RUSSIA
[2] RUSSIAN ACAD SCI,INST ELECTROCHEM,620219 SVERDLOVSK,RUSSIA
来源：
SOLID STATE IONICS | 1993年 / 66卷 / 1-2期
关键词：
D O I：
10.1016/0167-2738(93)90029-3
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 ionic conductivity of oxygen was studied in the dense ceramic YBa2Cu3O6+x using the oxygen permeation measurements. The temperature interval of measurements was 600-850-degrees-C and the limits of the partial pressure of oxygen were 0.06-1.00 atm. The method was based on the direct determination of the steady flow of oxygen through the specimen in the conditions of constant temperature with a small gradient of oxygen chemical potential along the sample. The oxygen diffusion coefficient was calculated. The activation energy (U) of the oxygen conductivity (diffusion coefficient) was determined in the interval 0.35 < x < 0.6. The dependence of the activation energy on the oxygen content in the tetragonal phase, U=2.80-1.45x (eV), was found. This dependence was explained by the interaction of the mobile oxygen ions.
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页码：61 / 67
页数：7
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