Kinetic Study on the Phase Transformation of GeO2

  • M. Yonemura
  • Y. Kotera


The stability relation of the three predominant modifications of germanium oxide are considered by Laubengayer and Morton as follows:

hexagonal⇋tetragonal → glass structure

No systematic rate studies have yet been made on germanium oxide to date, in the same way as on silica and titanium oxide.The rate of transformation in germanium oxide may be complicated by variation in particle size, temperature, surrounding atmosphere, and by the presence of impurities, especially when the reaction takes place entirely in the solid state.


Activation Energy Phase Transformation Arrhenius Plot Glass Structure National Chemical Laboratory 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Y. Kotera, M. Yonemura:Trans. Faraday Soc. 59, 147 (1963)CrossRefGoogle Scholar
  2. 2.
    Y. Kotera, M. Yonemura:J. Amer. Ceram. Soc. 52, 210 (1969)CrossRefGoogle Scholar
  3. 3.
    M. Yonemura, Y. Kotera: (1974)Bull. Chem. Soc. Japan 47, 789, 793Google Scholar
  4. 4.
    M. Yonemura, Y. Kotera:Denki Kagaku 43, 660 (1975)Google Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • M. Yonemura
    • 1
  • Y. Kotera
    • 1
  1. 1.National Chemical Laboratory for IndustryJapan

Personalised recommendations