Issue 38, 2015
From the journal:

RSC Advances

Gas-sensing and electrical properties of perovskite structure p-type barium-substituted bismuth ferrite

Guangzhi Dong,a   Huiqing Fan,*a   Hailin Tian,a   Jiawen Fanga  and  Qiang Lia  

* Corresponding authors

a State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
E-mail: hqfan3@163.com
Fax: +86-29-88492642
Tel: +86-29-88494463

Abstract

Pure and Ba-substituted bismuth ferrite (BiFeO3, BFO) powders were successfully synthesized via a sol–gel method. The effects of the Ba-substitution on the morphology, gas-sensing and electrical properties of BFO were studied. The gas-sensing tests show that the sensor based on Bi0.9Ba0.1FeO2.95 (BBFO10) has high sensitivity, quick response, effective selectivity and excellent long-time stability. The conduction mechanism and gas-sensing mechanism of a BBFO10 sample were investigated by the impedance spectroscopy and it was found that the conduction is dominated by p-type hole conduction. The conductivity of the sensor is dependent on the oxygen partial pressures and the type of gas atmosphere. The enhanced gas-sensing performances of the BBFO10 sensor are attributed to the higher oxygen vacancy concentration which was induced by the substitution of Bi3+ ion by an aliovalent Ba2+ ion at the A-site of the perovskite structure.

Graphical abstract: Gas-sensing and electrical properties of perovskite structure p-type barium-substituted bismuth ferrite

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Article information

DOI
https://doi.org/10.1039/C5RA01869B
Article type
Paper
Submitted
30 Jan 2015
Accepted
20 Mar 2015
First published
20 Mar 2015

RSC Adv., 2015,5, 29618-29623

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Gas-sensing and electrical properties of perovskite structure p-type barium-substituted bismuth ferrite

G. Dong, H. Fan, H. Tian, J. Fang and Q. Li, RSC Adv., 2015, 5, 29618 DOI: 10.1039/C5RA01869B

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