Some mechanical and optical properties of gamma-irradiated alpha-Al2o3 spheres subjected to 30-kilobars pressure

The γ‐irradiation‐induced optical absorption spectra of annealed Al2O3 single crystals were analyzed. The samples were beat‐treated in O2 or vacuum from 1600° to 1800°C. Four absorption bands are reported with average peak positions at 3.4,4.8,5.5, and 6.6 eV for samples annealed in O2 at ≥ 1750°C. Vacuum anneals up to 1800°C and O2 anneals at < 1700°C failed to generate observable bands in the energy range studied. There is also evidence that one or more bands exist at >6.6 eV. The radiation‐induced change in the absorption spectra is reported and the defect centers responsible for the measured optical absorption bands are discussed with respect to the aliovalent impurities in the host lattice. Special attention is given to the role of the Fe3+ impurity ion.

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Some mechanical and optical properties of gamma-irradiated alpha-Al2o3 spheres subjected to 30-kilobars pressure

Cited by 2 publications

References 22 publications

Gamma-ray induced defect bleaching in pressure deformed single crystal alpha-Al2O3

Gamma-ray induced defect bleaching in pressure deformed single crystal alpha-Al2O3

Defect Centers in Gamma‐Irradiated Single‐Crystal Al₂O₃

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Some mechanical and optical properties of gamma-irradiated alpha-Al2o3 spheres subjected to 30-kilobars pressure

Cited by 2 publications

References 22 publications

Gamma-ray induced defect bleaching in pressure deformed single crystal alpha-Al2O3

Gamma-ray induced defect bleaching in pressure deformed single crystal alpha-Al2O3

Defect Centers in Gamma‐Irradiated Single‐Crystal Al2O3

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Product

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Defect Centers in Gamma‐Irradiated Single‐Crystal Al₂O₃