Title: Preparation of nanometer magnesium aluminate spinel powders by sol-gel method

Authors: Wei Liu, Denghui Wu, Jinlong Yang

Addresses: College of Materials Science and Engineering, North University of China, Taiyuan, 030051, PR China. ' College of Materials Science and Engineering, North University of China, Taiyuan, 030051, PR China. ' State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China

Abstract: MgAl2O4 powder of 100∼300 nm was synthesised by sol-gel process with magnesium aluminium double n-butoxide as precursors. The dried gels transformed to ultrafine powders of MgA12O4 spinel phase at 800°C, and the intact MgA12O4 spinel phase formed at 1200°C. The microphotograph of MgA12O4 calcined at 1200°C showed that the powders got a small granularity, and good dispersivity. The property of magnesium aluminium n-butoxide was also studied by IR spectrum.

Keywords: magnesium aluminate spinel; double alkoxide; hydrolysis; sol-gel; ultrafine powders; magnesium aluminium n-butoxide; nanometers.

DOI: 10.1504/IJMPT.2010.031429

International Journal of Materials and Product Technology, 2010 Vol.37 No.3/4, pp.297 - 304

Published online: 03 Feb 2010 *

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