Proton conduction in perovskite oxide BaZr0.5Yb0.5O3-δ prepared by wet chemical synthesis route

被引：16

作者：

Ahmed, Istaq ^{[1
]}

Knee, Christopher S. ^{[2
]}

Eriksson, Sten-Gunnar ^{[1
]}

Ahlberg, Elisabet ^{[2
]}

Karlsson, Maths ^{[3
]}

Matic, Aleksandar ^{[3
]}

Borjesson, Lars ^{[3
]}

机构：

[1] Chalmers, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden

[2] Univ Gothenburg, Dept Chem, SE-41296 Gothenburg, Sweden

[3] Chalmers, Dept Appl Phys, SE-41296 Gothenburg, Sweden

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2008年 / 155卷 / 11期

基金：

瑞典研究理事会;

关键词：

D O I：

10.1149/1.2969806

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A wet chemical route has been used to synthesize the oxygen deficient perovskite BaZr0.5Yb0.5O3-delta. Analysis of X-ray powder diffraction data showed that both dried and hydrated samples adopt cubic crystal structures of space group Pm (3) over barm. Dynamic thermogravimetric analysis showed a significant mass loss for the hydrated sample compared to the dried sample, indicating that similar to 28% of the oxygen vacancies are filled by protonic defects. The strong O-H stretch band, 2500-3500 cm(-1), in the IR absorbance spectrum also clearly manifests the presence of significant levels of protons in the hydrated material. Proton conductivity was investigated on prehydrated (under dry Ar) and as-prepared (under wet Ar) samples. The heating cycle of the prehydrated sample showed higher proton conductivity compared to the cooling cycle, especially in the intermediate temperature range (150-550 degrees C). Finally, comparison with data for BaZr0.9Yb0.1O3-delta revealed that the more heavily doped sample showed higher proton conductivity compared to the more lightly doped sample. (C) 2008 The Electrochemical Society.

引用

页码：P97 / P102

页数：6

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