Thermal formation of corundum from aluminium hydroxides prepared from various aluminium salts View Full Text


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Article Info

DATE

2000-08

AUTHORS

J. Temuujin, Ts Jadambaa, K. J. D. Mackenzie, P. Angerer, F. Porte, F. Riley

ABSTRACT

Aluminium hydroxides have been precipitated from various aluminium salts and the differences in their thermal behaviour have been investigated. Pseudoboehmite derived from the nitrate, sulfate and chloride all form γ-Al2O3 at ∼ 400°C but the formation of α-A12O3 at 1200°C occurs more readily in the material derived from the sulfate. This contains a higher concentration of anionic impurities related to differences in the solubility of the original aluminium salts. The sulfate is retained in the gel to higher temperatures at which its eventual decomposition may lead to the formation of a reactive pore structure which facilitates the nucleation of α-A12O3. More... »

PAGES

301-304

References to SciGraph publications

  • 1980-10. Crystal Chemistry of Boehmite in CLAYS AND CLAY MINERALS
  • 1992-10. Characteristics of mullite prepared from co-precipitated 3Al2O3·2SiO2 powders in JOURNAL OF MATERIALS SCIENCE
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf02720086

    DOI

    http://dx.doi.org/10.1007/bf02720086

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1047866094


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