TEM Study on Stability of Mg-Doped γ-Alumina Fine Particles

Michiko Kusunoki; Masumi Rokkaku; Yuichi Ikuhara; Hiroaki Yanagida

doi:10.2320/matertrans1989.39.110

Materials Transactions, JIM

Online ISSN : 2432-471X
Print ISSN : 0916-1821
ISSN-L : 0916-1821

TEM Study on Stability of Mg-Doped γ-Alumina Fine Particles

Michiko Kusunoki, Masumi Rokkaku, Yuichi Ikuhara, Hiroaki Yanagida

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Keywords: γ-Al₂O₃, magnesium, spinel, transmission electron microscopy, high-resolution electron microscopy, phase transformation, thermal stability

JOURNAL FREE ACCESS

1998 Volume 39 Issue 1 Pages 110-113

DOI https://doi.org/10.2320/matertrans1989.39.110

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Abstract

Ultrafine spherical particles of γ-Al₂O₃ containing 4 at% magnesium and pure γ-Al₂O₃ were prepared by evaporating metal Al in air. Consequently, both particles were heated at 1400°C for 6 h in a vacuum. TEM observations showed that the Mg-doped γ-Al₂O₃ particles were much more stable than the pure γ-Al₂O₃ particles. The role of Mg atoms on the stability is discussed mainly based on the results obtained by high-resolution electron microscopy and energy dispersive X-ray spectroscopy.

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