低温固相反应合成Zn_2SnO_4及其气敏性能  

SYNTHESIS OF SOLID STATE REACTION AT LOW TEMPERATURE AND GAS SENSING PROPERTIES OF NANOMETER Zn_2SnO_4

作　　者：徐甲强[1] 贾晓华[2] 娄向东[2] 李超[1] 

机构地区：[1]郑州轻工业学院材料与化工学院,郑州450002 [2]河南师范大学化学与环境科学学院,河南新乡453007

出　　处：《硅酸盐学报》2006年第3期303-307,共5页Journal of The Chinese Ceramic Society

基　　金：河南省杰出青年科学基金(03120000800);河南省高校杰出科研人才创新工程(2003KYCX008)资助项目。

摘　　要：以SnCl4·5H2O,Zn(NO3)2·6H2O和NaOH为原料,用低温固相反应法合成尖晶石型复合氧化物Zn2SnO4纳米晶体。用X射线衍射、透射电镜表征粉末的晶体结构和形态。结果表明固相反应完全,合成的前躯体经600℃煅烧1h后可以得到单相的Zn2SnO4粉体,颗粒形状为球形,平均粒径约为50nm。将合成样品制成烧结型旁热式气敏元件,测试了元件的敏感特性。气敏测试结果表明尖晶石型复合氧化物Zn2SnO4为n型半导体气敏材料,在工作电压为5.0V时,材料对浓度为30μL/L的H2S有较高的灵敏度,其灵敏度高达75倍。Single phase spinel type composite oxide Znz SnO4 nanocrystals were prepared by solid state reaction at low temperature using SnCl4· 5H2O, Zn （NO3）2· 6H2O and NaOH as raw materials. The structure and morphology of the powder were characterized by means of X-ray diffraction and transmission electron microscopy. The results show that the solid state reaction is complete, and a homogeneous sphere-shaped Zn2SnO4 powder with the average diameter of 50 nm can be obtained after sintering at 600℃ for 1 h. The properties of the gas sensor prepared by using synthetic Zn2SnO4 powder were also measured. The results show that the Zn2 SnO4 is an excellent n-type semiconductor gas sensing material; the gas sensor exhibits high sensitivity and good selectivity to H2 S, and the sensitivity of the sensor to 30μL/L H2 S gas at 5.0 V working voltage can reach 75 times.

关 键 词：低温固相反应 锡酸锌 气体传感器 复合氧化物 

分 类 号：TQ174.758[化学工程—陶瓷工业]