MECHANICAL RELAXATION MEASUREMENTS IN THE PROTONIC CONDUCTORS SRCEO3 AND SRZRO3

被引：21

作者：

ZIMMERMANN, L ^{[1
]}

BOHN, HG ^{[1
]}

SCHILLING, W ^{[1
]}

SYSKAKIS, E ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, ENERGIETECH FORSCHUNGSZENTRUM, INST WERKSTOFFE, D-52425 JULICH, GERMANY

来源：

SOLID STATE IONICS | 1995年 / 77卷

关键词：

PROTONIC CONDUCTORS; PEROVSKITES; MECHANICAL RELAXATION; SRCEO3; SRZRO3;

D O I：

10.1016/0167-2738(94)00231-G

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：

Several mechanical relaxation peaks have been observed in the ceramic proton conductors SrCe1-xYbxO3-alpha and SrZrt-xYbxO3-alpha (x=0.025, 0.05, 0.1). The spectra consist of a superposition of peaks which can be attributed to defect clusters containing both protons and dopant atoms. These peaks are positioned near 0 degrees C for a typical measuring frequency of 300 Hz. For the cerates another relaxation contribution shows up near 100 degrees C. This can be related to oxygen vacancies near a dopant atom. Average activation energies of 0.5 eV for the proton related and 0.8 eV for the oxygen vacancy related local diffusion jumps are derived.

引用

页码：163 / 166

页数：4