Gas Sensing Characteristics of SnO_2 Whiskers Prepared from SNC_2O_4

作     者：Ki-Won Kim Pyeong-Seok Cho Jong-Heun Lee Seong-Hyeon Hong 

作者机构：Department of Materials Science & EngineeringKorea UniversitySeoui 136-713Korea School of Materials Science and Engineering and Nano Systems Institute-National Core Research CenterSeoul National UniversitySeoul 151-744Korea 

出 版 物：《稀有金属材料与工程》 (Rare Metal Materials and Engineering)

年 卷 期：2006年第35卷第A3期

页      面：100-103页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 0806[工学-冶金工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：SnO2 whisker orthorhombic phase gas sensor SnC2O4 

摘      要：SnO_2 whiskers were prepared from the decomposition of whisker-like SnC_2O_4,which was precipitated by a reaction between an aqueous SnCl_2 and oxalic acid solution at high solution temperatures (80℃).After the decomposition of SnC_2O_4 at 450℃,SnO_2 whiskers containing both of rutile and metastable orthorhombic phases were obtained with the content of the orthorhombic phase decreasing with increasing heat-treatment temperature and *** effect of orthorhombic phase upon CO gas sensitivity was investigated by measuring the evolution of the primary particle size and the CO sensitivity with repeating heat treatment at 450℃.The 50μg/g CO sensitivity increased with decreasing concentration of the orthorhombic phase despite particle coarsening,which suggests that the orthorhombic phase is detrimental to the CO gas sensitivity.