The formaldehyde sensitivity of LaFe1-xZnxO3-based gas sensor

被引：45

作者：

Huang, Shanxing

Qin, Hongwei ^{[1
]}

Song, Peng

Liu, Xing

Li, Lun

Zhang, Rui

Hu, Jifan

Yan, Hongdan

Jiang, Minhua

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Shandong Univ, Dept Phys, Jinan 250100, Peoples R China

[3] Kunming Univ Sci & Technol, Dept Phys, Kunming, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE | 2007年 / 42卷 / 24期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1007/s10853-007-1991-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rare earth oxides LaFe1-x Zn (x) O-3 were synthesized by sol-gel method. The X-ray diffraction patterns (XRD) showed that LaFe1-x Zn (x) O(3)oxides are single phase with orthorhombic perovskite structure, they all show p-type semiconducting properties. Among nanocrystalline LaFe1-x Zn (x) O-3 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 degrees 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%.

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页码：9973 / 9977

页数：5

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