高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (10): 1738.

• 论文 • 上一篇    下一篇

La0.8Ca0.2MnO3纳米线的制备及表征β

张辉, 马向阳, 徐进, 杨德仁   

  1. 浙江大学硅材料国家重点实验室, 杭州 310027
  • 收稿日期:2002-09-28 出版日期:2003-10-24 发布日期:2003-10-24
  • 通讯作者: 杨德仁(1964年出生),男,博士,教授,博士生导师,主要从事半导体材料研究.
  • 基金资助:

    浙江省自然科学基金(批准号:601092)资助

Fabrication and Characterization of La0.8Ca0.2MnO3Nanowires

ZHANG Hui, MA Xiang-Yang, XU Jin, YANG De-Ren   

  1. State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
  • Received:2002-09-28 Online:2003-10-24 Published:2003-10-24

摘要: 利用Sol-gel法结合氧化铝模板技术制备了La0.8Ca0.2MnO3纳米线,并研究了两种热处理方法对La0.8Ca0.2MnO3纳米线结构和形貌的影响.快速升温到800℃得到的La0.8Ca0.2MnO3纳米线较粗,其直径大于氧化铝模板的孔径,而经过缓慢升温到400℃预处理再升温到800℃得到的La0.8Ca0.2MnO3纳米线,其直径和氧化铝模板的孔径相当,都约为35nm.X射线衍射和透射电镜分析结果表明,两种方法得到的La0.8Ca0.2MnO3纳米线都是具有钙钛矿结构的属于单斜晶系的多晶材料.

关键词: 溶胶-凝胶法, 氧化铝模板, La0.8Ca0.2MnO3纳米线

Abstract: La0.8Ca0.2MnO3nanowires were prepared by using a simple sol-gel method with nano-channel alumina(NCA) as template.The effects of two kinds of annealing methods on the structure, morphology of La0.8Ca0.2MnO3nanowires were investigated.The diameter of La0.8Ca0.2MnO3nanowires prepared by ramping the furnace temperature directly to 800℃ with a rate of 10℃/min is larger than that of pores within NCA.While, the diameter of La0.8Ca0.2MnO3nanowires prepared by ramping the furnace temperature to 400 ℃ with a rate of 2 ℃/min and keeping at this temperature for 1h, then ramping to 800 ℃ with a rate of 10 ℃/min and keeping at this temperature for 2h is nearly equivalent to that of pores within NCA.XRDand selected area electron diffraction indicate that the nanowires derived under the two annealing conditions are of monoclinic perovskite structure.It is demonstrated that the La0.8Ca0.2MnO3nanowires with monoclinic perovskite structure can be fabricated at low temperatures by employing a solution route.The method presented in this paper is also feasible for fabricating the nanowires of other mono-component and multi-component oxides.

Key words: Sol-gel method, Alumina template, La0.8Ca0.2MnO3nanowires

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