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Sol-gel synthesis of magnesium aluminum spinel from a heterometallic alkoxide

Authors
Journal
Materials Research Bulletin
0025-5408
Publisher
Elsevier
Publication Date
Volume
29
Issue
5
Identifiers
DOI: 10.1016/0025-5408(94)90035-3

Abstract

Abstract MgAl 2O 4 spinel powder of 5 to 20 nm particle size, was prepared by the hydrolysis-condensation reaction of a heterobimetallic aluminum magnesium n-butoxide modified by polyethylene glycol (PEG). The gel after hypercritical drying yielded a porous aerogel with a density of 0.2 g/cm 3. Calcination of the aerogel at 700°C in air yielded a pure MgAl 2O 4 powder which could be hot pressed to transparency.

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