La1-xKxFeO3纳米粉体的制备及其气敏性能研究

孙淑敏; 韩周祥; 王申; 吴琼; 王培远

doi:10.3969/j.issn.2095-476X.2014.04.003

July 2014

Article Contents

SUN Shu-min, HAN Zhou-xiang, WANG Sheng, et al. Preparation and gas sensing property of La1-xKxFeO3 nanopowder[J]. Journal of Light Industry, 2014, 29(4): 12-15. doi: 10.3969/j.issn.2095-476X.2014.04.003

Citation: SUN Shu-min, HAN Zhou-xiang, WANG Sheng, et al. Preparation and gas sensing property of La1-xKxFeO3 nanopowder[J]. Journal of Light Industry, 2014, 29(4): 12-15. doi: 10.3969/j.issn.2095-476X.2014.04.003 shu

Preparation and gas sensing property of La_1-xK_xFeO₃ nanopowder

SUN Shu-min ^1,2 ,
HAN Zhou-xiang ^1,2 ,
WANG Sheng ¹ ,
WU Qiong ¹ ,
WANG Pei-yuan ^1,2,,

College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China;
He'nan Provincial Key Lab of Surface & Interface, Zhengzhou University of Light Industry, Zhengzhou 450001, China

Corresponding author: WANG Pei-yuan,
Received Date: 2014-03-07
Available Online: 2014-07-15

Abstract

The nanopowders of La_1-xK_xFeO₃(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 La_0.7K_0.3FeO₃ showed higher sensitivity to 3×10^-4 g/cm³ ethanol gas,and had better selectivity and response-recovery.
- perovskite,
- LaFeO₃,
- electrical property,
- gas sensing property
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