Preparation and gas sensing property of La1-xKxFeO3 nanopowder
SUNShu-min
HANZhou-xiang
WANGSheng
WUQiong
WANGPei-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 La0.7 K0.3 FeO3 showed higher sensitivity to 3 ×10 -4 g/cm3 etha-nol gas,and had better selectivity and response-recovery.
Keywords：perovskiteLaFeO3electrical propertygas sensing property
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 12-15 )