中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (2): 95-97.

• 研究论文 • 上一篇    下一篇

Ln2Mo3O9的制备、结构及电磁性质

史发年, 任玉芳, 孟建   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室, 长春 130022
  • 收稿日期:1994-10-23 修回日期:1995-01-01 出版日期:1995-04-10 发布日期:1995-04-10
  • 基金资助:
    国家科委和国家自然科学基金委资助项目

Preparation,Structure,Electrical and Magnetic PropertieS of Ln2Mo3O9

Shi Fanian, Ren Yufang, Meng Jian   

  1. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry Chinese Acadelny of Sciences, Changchun 130022
  • Received:1994-10-23 Revised:1995-01-01 Published:1995-04-10 Online:1995-04-10

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摘要： 高氧化态Mo6+与稀土的复合氧化物研究得较多,而低氧化态铝与稀土的复合氧化物研究得还不够深入.为了弄清元素价态和原子簇结构对物质电、磁性质的影响,本文进行了Ln2Mo3O9O9复合氧化物结构、价态及电磁性能的测试和研究.

关键词: 稀土钼酸盐, 结构, 电学性质, 磁学性质

Abstract: The molybdenum(Ⅳ)oxides of formula Ln2Mo3O9 were obtained by reduction of α-Ln2Mo3O12(Ln=La,Pr,Nd, Sm,Gd,Dy)as well as Ce2Mo3O12.25 in hydrogen at 500～650℃ for 60 hours,The compounds are of single phase and crystallize in tetragonal structurewith parameters a=0.5260nm～0.5131nm and c=1.18211nm1.1122nm. There are twobroad absorption bands in the IR spectra of the Ln2Mo3O9.All of the compounds are n-typesemiconductors with ρr.t.=92.13Ωcm～7.51Ωcm. Their electrical properties at 10～350℃and magnetic properties at 100～250K were measured.

Key words: rare earth molybdate, structure, electrical property, magnetic property

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