Perfect single-crystal alumina microspheres

    Authors

    W. Y. Yang; H. T. Wang; X. M. Cheng; Z. P. Xie;L. A. An

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    ULTRATHIN AL2O3 FILMS; ALPHA-ALUMINA; PARTICLES; TRANSFORMATION; ALPHA-AL2O3; GROWTH; THETA; Materials Science, Ceramics

    Abstract

    We report the synthesis of perfect single-crystal Al2O3 microspheres via direct thermal decomposition of aluminum isopropoxide in air without any template or catalyst. The obtained microspheres were characterized using scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and selective area electron diffraction. The results suggested that the formation of the spheres can be attributed to a transition from polycrystalline to single-crystalline symmetry during high-temperature annealing. The obtained microspheres could be useful for many applications such as lubricants and polishing mediums.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    91

    Issue/Number

    8

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    2732

    Last Page

    2735

    WOS Identifier

    WOS:000258379300049

    ISSN

    0002-7820

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