(Al,Sb)/ZnO复合氧化物对乙醇气体气敏功能特性的影响  

Sensing Properties of the ZnO Based Composite Oxide (Al,Sb)/ZnO to C2H5OH Gas

作　　者：薛天锋[1] 胡季帆[1] 秦宏伟[1] 周莹[1] 安康[1] 张玲[1] 韩涛[1] 李玉香[1] 

机构地区：[1]山东大学

出　　处：《稀有金属材料与工程》2004年第9期1006-1008,共3页Rare Metal Materials and Engineering

摘　　要：用可溶性无机盐法制备了较宽工作温度范围的纳米(Al,Sb)/ZnO气敏材料。该材料主相属于ZnO纤锌矿结构,并同时存在Sb2O5、Sb6O132种微量杂相。该复合氧化物的平均晶粒为86nm。用制备的氧化物纳米粉做成气敏元件,测试了不同铝含量的纳米材料在2000g/g浓度乙醇气体下的敏感特性。当铝含量为Al/ZnO=1.5%(mol比,下同)时,对2000g/g的乙醇气体的灵敏度最大可达到26。固定Al/ZnO=3%时,掺入不同量锑得到对乙醇气体有更大工作温度范围的纳米复合氧化物材料。同时讨论了掺铝掺锑复合氧化物对敏感气体的物理吸附和化学吸附及其气敏机理。Nanometer ZnO-base composite oxides were prepared by the inorganic salt sol-gel(ISG) method, and their structures were studied using XRD. The gas sensors were prepared from the nanometer ZnO-base composite oxides, and their sensing properties to different concentration of C2H5OH gases were investigated. A composition of Al/ZnO=1.5 mol% sensor shows a maximum sensitivity of 26 to 2 000 mug/g C2H5OH. The composite oxide Sb/Al/ZnO=5:3:100(mol)% has good gas sensing properties over wider working temperature range. The physical and chemical adsorptions and the gas-sensing mechanism of the composite oxide Sb/Al/ZnO were discussed.

关 键 词：纳米ZNO 气敏 可溶性无机盐法 

分 类 号：TP204[自动化与计算机技术—检测技术与自动化装置]