掺杂ZnSnO_3气敏特性及实用性研究  

Study of Gas Sensitive Properties and Practical Application of ZnSnO_3 by Additives

作　　者：王中长[1] 刘天模[1] 利佳[1] 余龙[1] 李家鸣 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]国家功能材料工程技术研究中心,重庆北碚400700

出　　处：《材料科学与工程学报》2005年第1期56-59,共4页Journal of Materials Science and Engineering

摘　　要：本文通过对ZnSnO3传感器进行各种掺杂来提高其灵敏度、选择性和工作温度。结果发现 :在所有的掺杂剂中 ,TiO2 能显著提高其灵敏度而且灵敏度是无掺杂ZnSnO3传感器的两倍多 ,并且最佳的掺杂量为 5 %mol。此外 ,这种掺杂ZnSnO3传感器的回复 响应时间为 10S左右 ,足够实际应用。在有其它气体存在的情况下 ,这种掺杂ZnSnO3传感器仍然对乙醇具有较高的选择性。用SEM对其进行了解释。因此 ,掺TiO2 的ZnSnO3传感器对乙醇具有较高的灵敏度并且保持较高的选择性 ,能够重复使用以及 6 0h后 ,其灵敏度可保持稳定值。The sensitivity, selectivity and working temperature of zinc tin complex oxide (ZnSnO_3) ethanol sensor have been researched by doping various kinds of additives. As a result, among all these additives, titania(TiO_2) is the most suitable one from the viewpoints of sensitivity, selectivity and working temperature. The sensitivity of ZnSnO_3 with TiO_2 addition is about twice larger than the pure ZnSnO_3 and the optimum addition amount of TiO_2 is 5%. Moreover, the response and recovery time is about 10 s, which is enough for practical application. This sensor plus TiO_2 addition still has a strong selectivity to ethanol when other gases exist at the same time. The reason could be explained through scanning electron microscopy (SEM). Therefore, ZnSnO_3 sensor with TiO_2 addition exhibits extremely high sensitivity to ethanol (C_2H_5OH) as well as excellent selectivity. The improved sensitivity due to TiO_2 addition is reproducible and exhibits almost constant sensitivity to C_2H_5OH(1000ppm) over a period of 60 hours.

关 键 词：电子陶瓷 气敏材料 ZnSnO3 TiO2添加剂 

分 类 号：TH86[机械工程—仪器科学与技术]