T.N. Yalovets, P.A. Gurjiyants, V.N. Kurlov, F. Theodore, J. Delepine: One of the Possibilities to Improve Optical Quality of As-Grown Shaped Sapphire Crystals

Crystal Research and Technology
Cryst. Res. Technol. 34 (1999) 821 - Abstract -

T.N. Yalovets, P.A. Gurjiyants, V.N. Kurlov, F. Theodore*, J. Delepine*

Institute of Solid State Physics RAS, Chernogolovka, Russia
*CEA CEREM/Departement d'Etudes des Materiaux, Grenoble, France

One of the Possibilities to Improve Optical Quality of As-Grown Shaped Sapphire Crystals

One of the possibilities to improve optical quality of as-grown shaped sapphire crystals is presented. Replacement of RF susceptor made of normal grade graphite by that made of pyrocarbon covered graphite results in increase of the optical transmission of sapphire ribbons grown by the Stepanov/EFG technique.

Keywords: shaped crystal growth, Sapphire single crystals, EPG/Stepanov method, polycarbon, optical quality

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