尖晶石型CoAl<sub>2</sub>O<sub>4</sub>纳米粉体的合成及表征

罗红玉; 田熙科; 杨超; 皮振邦

Volume 30 Issue 2

Mar. 2005

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LUO Hong-yu, TIAN Xi-ke, YANG Chao, PI Zhen-bang, 2005. Synthesis and Characterization of Nanocrystalline CoAl2O4 Spinel Powders. Earth Science, 30(2): 191-194.

Citation:

LUO Hong-yu, TIAN Xi-ke, YANG Chao, PI Zhen-bang, 2005. Synthesis and Characterization of Nanocrystalline CoAl₂O₄ Spinel Powders. Earth Science, 30(2): 191-194.

LUO Hong-yu, TIAN Xi-ke, YANG Chao, PI Zhen-bang, 2005. Synthesis and Characterization of Nanocrystalline CoAl2O4 Spinel Powders. Earth Science, 30(2): 191-194.

Citation:

LUO Hong-yu, TIAN Xi-ke, YANG Chao, PI Zhen-bang, 2005. Synthesis and Characterization of Nanocrystalline CoAl₂O₄ Spinel Powders. Earth Science, 30(2): 191-194.

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Synthesis and Characterization of Nanocrystalline CoAl₂O₄ Spinel Powders

Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

Received Date: 2004-10-08
Publish Date: 2005-03-25

Abstract

Abstract

The citrate-gel method was applied to prepare nanocrystalline CoAl₂O₄ spinel powders in an attempt to reduce the temperature of preparation and the calcination times. By means of thermogravimetric analysis (TG), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) techniques, the phase compositions of the precursor and its calcinations at different temperatures were investigated. The spinel CoAl₂O₄ powders were prepared in optimum conditions: n(Co²⁺)/(n(Al³⁺)) =1∶3, citric acid to Me mole ratio of 1∶1, pH value is about 6.5, 800 ℃ heat-treatment. The citrate-gel method was shown to be a convenient method of preparing homogeneous crystalline CoAl₂O₄ powders with an average particle size of 60 nm and a narrow size distribution.
- CoAl₂O₄,
- citrate-gel method,
- nanocrystalline powder

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References(8)

References

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