Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 114, Issue 2, Pages 836-840Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2005.08.002
Keywords
perovskite structure; gas-sensing; ethanol gas
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The nanocrystalline La1-xPbxFeO3 (x=0.0-0.50) powders with orthorhombic perovskite phase were prepared by a sol-gel method. The Pb-doping restrained the growth of the crystallite size. The electrical properties and ethanol-sensing characteristics of the La1-xPbxFeO3 system were investigated. The results demonstrated that the resistance and conduction type (p- or n-type) of the perovskite oxides changed with the increasing composition x. Among the oxides with compositions of x = 0.30-0.50, La0.68Pb0.32FeO3 (x=0.32) showed the best ethanol gas-sensing characteristics. (c) 2005 Elsevier B.V. All rights reserved.
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