A STUDY OF THE CRYSTALLINE TRANSFORMATION IN LIAL(5)O(8)

Abstract

A study was made of the high-temperature phase change that occurs in LiAl5O8. The reaction has been reported to be either an order-disorder transformation or a reconstructive polymorphic inversion. Kinetics of the phase change with respect to compositional, temperature, and time variables were studied. The spinel structure was found to exist over wide compositional ranges in both lithia-rich and lithia-poor regions. The degree of the defectiveness of the structures affected the transformation rates. The transformation process is diffusion controlled and required a small activation energy. Insufficient evidence was obtained to resolve the question of the type of change that occurs.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1964
Accession Number
AD0431188

Entities

People

  • H. H. Wilson

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminates
  • Aluminum Compounds
  • Aluminum Oxides
  • Chemistry
  • Crystal Structure
  • Crystals
  • Diffraction
  • Heat Of Activation
  • Lithium Compounds
  • Materials
  • Materials Laboratories
  • Measurement
  • Phase
  • Phase Diagrams
  • Phase Transformations
  • Transition Temperature
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Educational Psychology
  • Materials Science and Engineering.