Fabrication and Characterization of La0.8Ca0.2MnO3Nanowires

Abstract

Abstract: La_0.8Ca_0.2MnO₃nanowires 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 La_0.8Ca_0.2MnO₃nanowires were investigated.The diameter of La_0.8Ca_0.2MnO₃nanowires 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 La_0.8Ca_0.2MnO₃nanowires 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 La_0.8Ca_0.2MnO₃nanowires 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, La_0.8Ca_0.2MnO₃nanowires

CLC Number:

O614

TrendMD:

ZHANG Hui, MA Xiang-Yang, XU Jin, YANG De-Ren . Fabrication and Characterization of La_0.8Ca_0.2MnO₃Nanowires[J]. Chem. J. Chinese Universities, 2003, 24(10): 1738.

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Fabrication and Characterization of La_0.8Ca_0.2MnO₃Nanowires

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