Journal of Applied Electrochemistry

, Volume 11, Issue 1, pp 77–82 | Cite as

Synthesis of potassium beta-alumina by thermal decomposition of a complex

  • T. Takahashi
  • K. Kuwabara
  • H. Ohyanagi


Potassium beta-alumina was synthesised from potassiumm-alumina by a new technique. Thermal decomposition of a complex, trioxalatoaluminate Kx(NH4)3−x [Al(C2O4)3] ·3H2O (0.091⩽x⩽ 0.333), resulted in the formation of a fine powder of Km-alumina with mullite-like structure. The decomposition process was studied by thermal analysis and X-ray diffraction, and the phase relation of the K2O-Al2O3 system is discussed in the mid-temperature region of 600–1200°C. The a.c. conductivity, the apparent density and the lattice parameters were measured. The complex decomposition was shown to be a suitable method for Kβ-alumina synthesis.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    J. T. Kummer, ‘Progress in Solid State Chemistry’, Vol. 7 (edited by H. Reiss and J. O. McCaldin), Pergamon, Oxford (1972) p. 141.Google Scholar
  2. [2]
    T. Takahashi and K. Kuwabara,J. Appl. Electrochem. 10 (1980) 291.Google Scholar
  3. [3]
    A. J. Perrotta and J. E. Young, Jr.,J. Amer. Ceram. Soc. 57 (1974) 405.Google Scholar
  4. [4]
    A. G. Elliot and R. A. Huggins,ibid 58 (1975) 497.Google Scholar
  5. [5]
    T. Takahashi and K. Kuwabara,J. Solid State Chem. 30 (1979) 321.Google Scholar
  6. [6]
    J. Paris and R. Paris,Bull. Soc. Chim. France 4 (1965) 1138.Google Scholar
  7. [7]
    D. J. Dyson and W. Johnson,Trans. J. Brit. Ceram. Soc. 72 (1973) 49.Google Scholar
  8. [8]
    G. Yamaguchi and K. Suzuki,Bull. Chem. Soc. Japan 41 (1968) 93.Google Scholar
  9. [9]
    G. C. Farrington, J. L. Briant, M. W. Breiter and W. L. Roth,J. Solid State Chem. 24 (1978) 311.Google Scholar

Copyright information

© Chapman and Hall Ltd 1981

Authors and Affiliations

  • T. Takahashi
    • 1
  • K. Kuwabara
    • 1
  • H. Ohyanagi
    • 1
  1. 1.Department of Applied Chemistry, Faculty of EngineeringNagoya UniversityNagoyaJapan

Personalised recommendations