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2004•Journal of Gansu Education CollegeRequires access

The Preparation of Nano-sized γ-Al_2O_3 Powders by Using Urea as Precipitating Agent

Lijun He

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Abstract

Nano-sized γ-Al_2O_3 powders were prepared by the homogeneous precipitation method using urea and aluminium nitrate as the starting material in the reflux condition. The heat-treated final powders were characterized by X-ray diffractometry (XRD),transmission electron microscopy(TEM) and fourier transform infrared spectrometry (FTIR).The result indicated that the 10 nm γ-Al_2O_3 powders were attained by the calcinations of the precursors at 1000℃. The formation mechanism of nano γ-Al_2O_3 was also discussed in this paper.

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What this paper is about

Nano-sized γ-Al_2O_3 powders were prepared by the homogeneous precipitation method using urea and aluminium nitrate as the starting material in the reflux condition. The heat-treated final powders were characterized by X-ray diffractometry (XRD),transmission electron microscopy(TEM) and fourier transform infrared spectrometry (FTIR).The result indicated that the 10 nm γ-Al_2O_3 powders were attained by the calcinations of the precursors at 1000℃. The formation mechanism of nano γ-Al_2O_3 was also discussed in this paper.

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Available abstract

Nano-sized γ-Al_2O_3 powders were prepared by the homogeneous precipitation method using urea and aluminium nitrate as the starting material in the reflux condition. The heat-treated final powders were characterized by X-ray diffractometry (XRD),transmission electron microscopy(TEM) and fourier transform infrared spectrometry (FTIR).The result indicated that the 10 nm γ-Al_2O_3 powders were attained by the calcinations of the precursors at 1000℃. The formation mechanism of nano γ-Al_2O_3 was also discussed in this paper.

Key concepts: Aluminium nitrate, Fourier transform infrared spectroscopy, Transmission electron microscopy, Nano-, Urea, Materials science, Precipitation, Nuclear chemistry

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