Oxidation/reduction effects on the thermoluminescence of α-Al2O3 single crystals

G. Molnár, J. Borossay, M. Benabdesselam, P. Iacconi, D. Lapraz, K. Süvegh, A. Vértes

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Abstract

α-Al2O3 crystals were treated in different atmospheres (reducing/oxidising) at high temperature and their optical, positron-annihilation and thermoluminescent (TL) properties were investigated. From optical absorption and positron-annihilation spectra we concluded that aluminium-vacancies were created while oxygen-vacancies were destroyed in oxidised samples indicating a Schottky-type disorder. Structural changes were correlated with TL glow curves and the origin of some TL peaks was explained.

Original languageEnglish
Pages (from-to)249-260
Number of pages12
JournalPhysica Status Solidi (A) Applied Research
Volume179
Issue number1
DOIs
Publication statusPublished - May 1 2000

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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