Evolution of Defective State of Aluminum Oxide Irradiated with Chromium Ions after Annealing in Oxygen Environment

A. V. Kabyshev, F. V. Konusov

Research output: Contribution to journalArticle

Abstract

The characteristics of interband and exponential optical absorption of leucosapphire and polycrystalline corundum (polycor) after irradiation with chromium ions and subsequent annealing in vacuum at 300-1800 K and in air at 300-800 K are studied. Contributions of defects with different thermal and chemical stability into optical parameters were established. The effect of intrinsic radiation defects, of substitutional defects and of complexes on base of oxygen and defects on formation the focal point in absorption spectra owing to fulfilment of the Urbach rule was determined. Heating in air of strongly defective material synthesized in surface layers of alumina by the ion-heat modification influences the characteristics of defects and the electronic structure of band gap negligibly.

Original languageEnglish
Article number012001
JournalIOP Conference Series: Materials Science and Engineering
Volume168
Issue number1
DOIs
Publication statusPublished - 7 Feb 2017
Event12th International Conference Radiation-Thermal Effects and Processes in Inorganic Materials - Tomsk, Russian Federation
Duration: 4 Sep 201612 Sep 2016

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Aluminum Oxide
Chromium
Annealing
Ions
Oxygen
Aluminum
Defects
Oxides
Corundum
Chemical stability
Air
Light absorption
Electronic structure
Absorption spectra
Energy gap
Thermodynamic stability
Alumina
Irradiation
Vacuum
Radiation

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

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