Structure and electrical properties of nanocrystalline La1-xBaxFeO3 for gas sensing application

被引：87
作者：
Sun, Lihui [1 ]
Qin, Hongwei [1 ]
Wang, Kaiying [2 ]
Zhao, Ming [1 ]
Hu, Jifan [1 ]
机构：
[1] Shandong Univ, Dept Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[2] Vestfold Univ Coll, Inst Microsyst Technol, N-3184 Horten, Norway
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 125卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Sol-gel method; Perovskite; Nanocrystalline; Gas-sensing; THERMAL-DECOMPOSITION; TOTAL OXIDATION; CO; FILM; LNFEO(3); CA; LA;
D O I：
10.1016/j.matchemphys.2010.09.052
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The nanocrystalline La1-xBaxFeO3 powders with x <= 0.3 were prepared by a sol-gel method. X-ray diffraction patterns indicate that the nanocrystalline La1-xBaxFeO3 powders are perovskite phase with orthorhombic structure. With the increasing concentration of elemental barium, the growth of the grain size is restrained. In addition, the resistance and ethanol gas-sensing properties of La1-xBaxFeO3 based sensors strongly depend on the Ba concentration. The highest response to ethanol gas (500 ppm) is 172 at 240 degrees C for the La1-xBaxFeO3 based sensor with x=0.25. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：305 / 308
页数：4
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