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Preparation of ultrafine alumina powders by plasma evaporation

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Abstract

It has been shown that the centrifugal liquid-wall furnace is a convenient and economically attractive tool for the vaporisation of alumina. A reducing environment, conveniently supplied by using composite cores of alumina and particulate carbon, can greatly increase the evaporation rate and, on reoxidation of the vapour produced, an ultrafine oxide of high and controllable surface area is obtained.

The product is comparable with fumed aluminas made commercially by the oxidation of aluminium halides in the oxyhydrogen flame. Potential applications include flow control of liquids and powders, reinforcement of elastomers and adhesives, ceramic fabrication and heterogeneous catalysis.

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Authors and Affiliations

  1. Division of Inorganic and Metallic Structure, National Physical Laboratory, Teddington, Middlesex

    D. A. Everest, I. G. Sayce & B. Selton

Authors
  1. D. A. Everest
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  2. I. G. Sayce
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  3. B. Selton
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Everest, D.A., Sayce, I.G. & Selton, B. Preparation of ultrafine alumina powders by plasma evaporation. J Mater Sci 6, 218–224 (1971). https://doi.org/10.1007/BF00550016

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  • DOI: https://doi.org/10.1007/BF00550016

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