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材料研究学报  2010, Vol. 24 Issue (3): 327-331    
  研究论文 本期目录 | 过刊浏览 |
LaNi5合金膜退火后的表面结构和氢敏特性
刘华容,陈侃松,刘俊峰,谢鲲,顾豪爽
湖北大学 物理学与电子技术学院 武汉 430062
Study on the Surface Structure and Hydrogen Sensitivity of LaNi5 Alloy Film Annealed
 LIU  Hua-Rong, CHEN  Kan-Song, LIU  Dun-Feng, XIE  Kun, GU  Hao-Shuang
Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062
引用本文:

刘华容, 陈侃松, 刘俊峰, 谢鲲, 顾豪爽. LaNi5合金膜退火后的表面结构和氢敏特性[J]. 材料研究学报, 2010, 24(3): 327-331.
, , , , . Study on the Surface Structure and Hydrogen Sensitivity of LaNi5 Alloy Film Annealed[J]. Chin J Mater Res, 2010, 24(3): 327-331.

全文: PDF(864 KB)  
摘要: 

通过在空气中退火来改善由磁控溅射方法制备的LaNi5合金膜的表面结构, 使其具有在室温下吸放氢的能力。借助原子力显微镜、X射线衍射和X射线光电子能谱, 分析了LaNi5合金膜退火前后的形貌、结构和表层成分。结果表明: 在空气中退火后, LaNi5合金膜比表面积增加, 并在其表层形成了La2O3--Ni的表层结构。氢敏测试结果显示, 在空气中退火的样品不需要在高压纯氢中活化, 在室温下即对氢气响应, 说明该合金膜可以作为氢气传感器的敏感层。

关键词 金属材料氢敏LaNi5退火La2O3--Ni    
Abstract

LaNi5 alloy films have been prepared by magnetron sputtering. Through annealing their surface structure was improved and they had the capacity of absorbing and desorbing hydrogen in the air. The structure, surface morphology and element composition of the samples before and after annealing were analysed by X-ray diffraction, atomic force microscopy and X-ray photoelectron spectroscopy, respectively. The results showed that specific surface area of LaNi5 films was increased and a kind of surface structure of La2O3-Ni was formed after annealing. The hydrogen sensitivity of the annealed samples was studied and results indicated they are in response to hydrogen at room temperature in the air without activation in hydrogen atmosphere, which suggested LaNi5 alloy films have large potential application in hydrogen sensor.

Key wordsmetallic materials    hydrogen sensor    LaNi5    annealed    La2O3--Ni
收稿日期: 2009-11-26     
ZTFLH: 

TB31

 
基金资助:

湖北省自然科学基金2008CDB001和湖北省教育厅青年人才项目

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