| SnO_2纳米粉体的制备及其气敏性能研究 |
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| 引用本文： | 牛新书,杜慧.SnO_2纳米粉体的制备及其气敏性能研究[J].电子元件与材料,2007,26(2):31-33. |
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| 作者姓名： | 牛新书 杜慧 |
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| 作者单位： | 1. 河南师范大学化学与环境科学学院,河南省环境污染控制重点实验室,河南,新乡,453007
2. 安阳工学院化工系,河南,安阳,455000 |
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| 摘 要： | 以Sn粒为原料,在柠檬酸体系中,用sol-gel法合成了具有四方晶系的SnO2粉体。用XRD、TEM对产物的组成、粒径、形貌进行了表征。结果表明:产物为平均粒径25 nm左右的圆球形颗粒。另外,在最佳工作温度300℃时,采用静态配气法测试了材料的气敏性能,发现SnO2对体积分数为5×10–5的氯气的灵敏度高达805,而且对其它气体有很好的抗干扰能力。元件的响应恢复特性良好,响应时间和恢复时间分别为3 s和7 s。
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| 关 键 词： | 电子技术 SnO_2纳米粉体 sol-gel法 气敏材料 氯气 |
| 文章编号： | 1001-2028（2007）02-0031-03 |
| 修稿时间： | 2006-08-22 |
Preparation of SnO2 nanopowder by sol-gel method and its gas sensitivity properties |
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| NIU Xin-shu,DU Hui.Preparation of SnO2 nanopowder by sol-gel method and its gas sensitivity properties[J].Electronic Components & Materials,2007,26(2):31-33. |
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| Authors: | NIU Xin-shu DU Hui |
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| Abstract: | SnO2 powders were synthesized by sol-gel method in the system of citric acid with Sn grain as the starting materials.The structure and crystal state of the powders were determined by XRD method.The shape and size were analyzed by means of JEM—100SX TEM.The results show this tetragonal system oxide is spherical with the mean grain size of 25 nm and its dispersity is good.The study of sensor’s gas sensing characteristic shows SnO2 has higher sensitivity(805)to 50×10–6 Cl2 at 300 ℃ when the precursor has been treated at 550 ℃.At the same time,its selectivity is also good.The response time and recovery time are 3 s and 7 s,respectively. |
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| Keywords: | electron technology SnO2 nanopowder sol-gel method gas-sensoring material Cl2 |
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