Oxygen nonstoichiometry in SrCeO3-based high-temperature protonic conductors evaluated by Raman spectroscopy

被引：19

作者：

Mineshige, A ^{[1
]}

Okada, S

Sakai, K

Kobune, M

Fujii, S

Matsumoto, H

Shimura, T

Iwahara, H

Ogumi, Z

机构：

[1] Himeji Inst Technol, Dept Appl Chem, Himeji, Hyogo 6712201, Japan

[2] Nagoya Univ, Ctr Integrated Res Sci & Engn, Nagoya, Aichi 4648603, Japan

[3] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Sakyo Ku, Kyoto 6068501, Japan

来源：

SOLID STATE IONICS | 2003年 / 162卷

关键词：

strontium cerate; hgh temperature protonic conductor; oygen nonstoichiometry; Raman spectroscopy;

D O I：

10.1016/S0167-2738(03)00232-7

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：

Raman spectra of Yb-doped strontium cerate SrCe1-xYbxO3-delta were measured to evaluate their defect structure, which is much expected to influence their physical properties, such as solubility and diffusivity of protons in these oxides. In spectra, a signal showing existence of oxygen vacancies was observed at about 630 cm(-1) for doped samples. The intensity of this band increased with oxygen vacancy formation by Yb-doping and by annealing at high temperatures in dry [low P(H2O)] or reducing [low P(O-2)] conditions. Since a clear relationship between a peak intensity of the oxygen vacancy band and dopant concentration was obtained, it was found oxygen nonstoichiometry in SrCe1-xYbxO3-delta system could be evaluated using this relationship. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：41 / 45

页数：5

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