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- Title
Preparation and gas sensing property of La<sub>1-x</sub>K<sub>x</sub>FeO<sub>3</sub> nanopowder.
- Authors
SUN Shu-min; HAN Zhou-xiang; WANG Sheng; WU Qiong; WANG Pei-yuan
- Abstract
The nanopowders of La1-xKxFeO3 (x = 0,0. 1,0.2,0.3,0.5) were prepared by a citric acid sol-gel method. Their microstructure and ethanol-sensing properties were investigated. The results showed that with the doping of K+ the obtained powders were an orthorhombic perovskite structure, and the doping of K+ could restrained the growth of the grain size. The K+ doping enormously enhanced the conductivity of the samples. The gas sensors based on the La0.7K0.3FeO3 showed higher sensitivity to 3 x 10-4 g/cm³ ethanol gas, and had better selectivity and response-recovery.
- Subjects
SYNTHESIS of Nanocomposite materials; CITRIC acid; SOL-gel processes; ETHANOL; POTASSIUM channels
- Publication
Journal of Zhengzhou University of Light Industry, Natural Science Edition, 2014, Vol 29, Issue 4, p12
- ISSN
2095-476X
- Publication type
Article
- DOI
10.3969/j.issn.2095-476X.2014.04.003