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Thermal stabilization of an active alumina and effect of dopants on the surface area

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Abstract

The α-AI2O3 transformation of a monolithic active alumina has been increased from 1200 to ∼1380‡ C through structural incorporation of silica. This shift is significant since α-Al2O3 transformation determines the limits of the usefulness of these materials as catalysts and catalyst carriers. The thermal stabilization effect is optimized at around 6% silica doping. At elevated temperatures, the material containing no silica rapidly loses surface area, primarily by α-Al2O3 transformation, whereas the material containing excess silica loses surface area by classical sintering.

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Author notes

  1. Bulent E. Yoldas

    Present address: Research Laboratories, Westinghouse Electric Corporation, Beulah Road, 15235, Pittsburgh, PA, USA

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  1. Owens-Illinois, Inc, Technical Center, 1700 N. Westwood Avenue, Toledo, Ohio, USA

    Bulent E. Yoldas

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  1. Bulent E. Yoldas
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Yoldas, B.E. Thermal stabilization of an active alumina and effect of dopants on the surface area. J Mater Sci 11, 465–470 (1976). https://doi.org/10.1007/BF00540927

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  • DOI: https://doi.org/10.1007/BF00540927

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