高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (6): 803.

• 论文 • 上一篇    下一篇

纳米晶La1－xSrxFeO3的合成及气敏特性的研究

吴凤清1, 徐宝琨2, 李熙1, 索辉1, 杨桦1, 赵慕愚1   

  1. 1. 吉林大学化学系, 长春, 130023;
    2. 吉林大学电子工程系, 长春, 130023
  • 收稿日期:1993-10-20 修回日期:1994-02-23 出版日期:1994-06-24 发布日期:1994-06-24
  • 通讯作者: 吴凤清,女,42岁,讲师.
  • 作者简介:吴凤清,女,42岁,讲师.
  • 基金资助:

    国家自然科学基金

Studies on Synthesis and Sensing Characteristics of Nanocrystalline La1-xSrxFeO3

WU Feng-Qing1, XU Bao-Kun2, LI Xi1, SUO Hui1, YANG Hua1, ZHAO Mu-Yu1   

  1. 1. Department of Chemistry, Jilin University, Changchun, 130023;
    2. Department of Electronics Engineering, Jilin University, Changchun, 130023
  • Received:1993-10-20 Revised:1994-02-23 Online:1994-06-24 Published:1994-06-24

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摘要： 用柠檬酸盐法合成出La1-xSrxFeO3(x=0.1,0.2,0.3,0.4)原粉,再经固相反应得到纳米晶粉末,用TG、DTA、XRD、IR进行了表征,确证复合氧化物La1-xSrxFeO3为钙钛矿型结构,粒径在10～25nm之间。实验结果表明,随着固相反应条件不同,产物粒径呈规律性变化。气敏特性研究表明,该纳米晶材料对乙醇有较高的选择性和灵敏度,其选择性顺序为La0.9Sr0.1FeO3>LaFeO3>LaFeO3(大晶粒).

关键词: 纳米晶, 钙钛矿型, 气敏特性

Abstract: Using citrate method, a series of nanocrystalline materials of composite oxides La1-xSrxFeO3(x=0, 0.1, 0.2, 0.3, 0.4)were synthesized.These samples were characterized by XRD, IR, TGand DTA.The crystal structure is of perovskite-ype;The grain size is about 10-25 nm, The experimental results show that the grain sizes are related to the composition, calcination temperature and time, and nanocrystalline materials La1-xSrxFeO3(x=0, 0.1)possess a high selectivity to ethanol, the order of selectivity is La0.9Sr0.1FeO3>LaFeO3(23nm)>LaFeO3(110nm).

Key words: Nanocrystalline, Perovstite-type, Sensing character

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