Author/Authors :
Shanxing Huang، نويسنده , , Hongwei Qin، نويسنده , , Peng Song، نويسنده , ,
Xing Liu، نويسنده , , Lun Li، نويسنده , , Rui Zhang، نويسنده , , Jifan Hu، نويسنده , ,
Hongdan Yan، نويسنده , ,
Minhua Jiang، نويسنده ,
Abstract :
Rare earth oxides LaFe1-xZnxO3 were synthesized
by sol–gel method. The X-ray diffraction patterns
(XRD) showed that LaFe1-xZnxO3oxides are single phase
with orthorhombic perovskite structure, they all show ptype
semiconducting properties. Among nanocrystalline
LaFe1-xZnxO3 oxides, LaFe0.77Zn0.23O3 exhibits the highest
sensitivity of 44.5 to 100 ppm formaldehyde. The optimal
working temperature was found to be around 240 C.
Moreover the LaFe0.77Zn0.23O3 exhibites short response
and recovery time to 100 ppm formaldehyde. The lattice
parameter doesn’t agree with Vegard’s law with the
increasing Zn content, and the relative density was
70–80%.
