Specific features of the morphology and distribution of gas inclusions in single-crystal sapphire ribbons grown by the Stepanov method |
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Authors: | S. I. Bakholdin V. N. Maslov Yu. G. Nosov |
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Affiliation: | 1. Ioffe Physical-Technical Institute, Russian Academy of Sciences, ul. Politekhnicheskaya 26, St. Petersburg, 194021, Russia
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Abstract: | The distribution of gas inclusions in single-crystal sapphire ribbons with different crystallographic orientations, grown by the Stepanov method, is analyzed. In all ribbons gas inclusions are observed only in thin surface layers located at a depth of about 100 μm. One characteristic feature is the presence of several zones with different distributions and morphologies of inclusions. We observed inclusions of the two types: cylindrical pores and microbubbles. The differences in the morphology and zonality of the gas-inclusion distribution are consistent with the α-Al2O3 crystallography. |
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