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物理化学学报 >> 2000, Vol. 16 >> Issue (04): 312 -316 .doi: 10.3866/PKU.WHXB20000405

研究论文 上一篇    下一篇

α-Fe2O3纳米微粒的制备及其Mössbuer谱研究

姜继森, 高濂, 杨燮龙, 郭景坤   

  1. 华东师范大学化学系、物理系,上海 200062|中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室,上海 200050
  • 收稿日期:1999-07-04 修回日期:1999-09-20 发布日期:2000-04-15
  • 通讯作者: 姜继森

Preparation and Mössbauer Studies of α-Fe2O3 Nanoparticle

Jiang Ji-Sen, Gao Lian, Yang Xie-Long, Guo Jing-Kun   

  1. Department of Chemistry and Physics,East China Normal University,Shanghai 200062|The State Key Laboratory on High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050
  • Received:1999-07-04 Revised:1999-09-20 Published:2000-04-15
  • Contact: Jiang Ji-Sen

摘要:

通过高能球磨的研磨 ,直接由普通α-Fe2O3 粗颗粒制得了粒径约为10nm的α-Fe2O3 纳米微粒. 发现所得纳米微粒的室温Mossbauer谱为不对称向内加宽的磁分裂六线峰. 分析表明 ,不对称向内加宽现象主要由集体磁激发效应所引起.球磨所得α-Fe2O3 纳米晶具有很高的各向异性常数值(K=8.9×103J•m -3).

关键词: 纳米微粒, α-Fe2O3, 各向异性常数, 高能球磨, Mfont-size: 10.5pt, mso-bidi-font-size: 15.0pt, mso-fareast-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, össbuer谱')">mso-bidi-language: AR-SA" lang="EN-US">össbuer谱

Abstract:

α-Fe2O3 nanoparticle with diameter of 10 nm was prepared by high energy ball milling directly from coarse α-Fe2O3 powders. It was found that the Mossbauer spectrum of the α-Fe2O3 nanoparticle at room temperature showed magnetic splitting sexlet lines broadened asymmetrically toward the central peaks .The asymmetric broadening of the spectral peaks could be attributed to the collective magnetic excitations. The anisotropic constant of the α-Fe2O3 nanoparticle exhibited a very high value (K=8.9×103J•m-3).

Key words: Nanoparticle, α-Fe2O3, Anisotropic constant, High energy ball milling, Mfont-size: 10.5pt, mso-bidi-font-size: 15.0pt, mso-fareast-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, össbauer spectrum')">mso-bidi-language: AR-SA" lang="EN-US">össbauer spectrum