Preparation and gas-sensing properties of NANO-CdIn2O4 material

被引：24
作者：
Chu, XF [1 ]
Liu, XQ [1 ]
Meng, GY [1 ]
机构：
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 1999年 / 34卷 / 05期
基金：
中国国家自然科学基金;
关键词：
nanostructures; chemical synthesis; defects; electrical properties;
D O I：
10.1016/S0025-5408(99)00074-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanometer powders of the CdO-In2O3 system were prepared by a chemical coprecipitation method. The effects of preparation conditions on the phase constituents of the powders were investigated. Pure fee spinel CdIn2O4 phase with a nonstoichiometric formula of Cd(In1-xCdx)(2)O4-x was obtained at a temperature above 500 degrees C for a mixed precursor with Cd/In = 1.3/2. Atomic absorption spectrum analysis revealed that the molar ratios Cd/In of the precipitate and the precipitate sintered at 600 degrees C for 4 h were both 1.08/2. The crystallite size of the powders was in the range of 14-26 nm, increasing with firing temperature. The phase was stable up to at least 800 degrees C. The conductance-temperature characteristics of the nano-CdIn2O4 spinel phase were studied and determined by oxygen adsorption on the surface of the materials. The investigation of gas-sensing performance of the sensors demonstrated that the nano-CdIn2O4-based sensors have fairly high sensitivity and selectivity to C2H5OH and are promising for practical development. (C) 1999 Elsevier Science Ltd.
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页码：693 / 700
页数：8
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