CdFe_2O_4纳米粉体的制备及其气敏特性研究  

Gas sensitivity of CdFe_2O_4 synthesized by solid state reaction and decomposition at low temperature

作　　者：徐甲强[1,2] 刘照红[3] 王焕新[4] 沈嘉年[1] 

机构地区：[1]郑州轻工业学院材料与化工学院 [2]上海大学材料研究所,上海200072 [3]郑州轻工业学院信息与控制工程系 [4]上海大学材料研究所

出　　处：《功能材料与器件学报》2004年第3期387-390,共4页Journal of Functional Materials and Devices

基　　金：2003年河南省高校杰出科研人才创新工程(No.2003KYCX008);河南省科技攻关计划(No.0224380032)

摘　　要：以无机盐为原料,采用低温固相化学反应合成了尖晶石型复合氧化物CdFe2O4的前驱体,并在较低煅烧温度下得到了CdFe2O4纳米晶。X-射线粉末衍射(XRD)、透射电镜(TEM)等表征结果表明,固相反应完全,所得CdFe2O4纳米晶的平均粒径约为30nm左右;与传统方法相比,该法降低了CdFe2O4物相形成温度。将样品制成烧结型气敏元件,发现在较低的工作温度时,对H2S有较高的灵敏度和选择性。Spinel-type complex oxide nanocrystalline powders CdFe2O4 was synthesized by solid-statereaction and decomposition at low temperature with inorganic reagent. The results of XRD and TEM indicate that the solid-state reaction is complete and the mean grain size of the powder is about 30nm. Compared with the traditional methods, the solid state reaction at low temperature decreases the forming temperature of spinel phase. The gas-sensing properties of the pure powders were studied. The resultsreveal that the sensors based on CdFe2O4 show a high sensitivity and selectivity to H2S at low workingtemperature.

关 键 词：铁酸镉 固相化学反应 半导体 气敏材料 气体传感器 XRD TEM 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]