INVESTIGATION OF ELECTRON BEAM PROCESSING OF ALUMINUM OXIDE AND RELATED MATERIALS.
MATERIALS RESEARCH CORP ORANGEBURG N Y
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Float-zone crystal growth techniques were applied to the preparation of refractory nonconducting crystals currently of interest to the laser technology. In these studies, sapphire and ruby served as test materials to evaluate the advantages and limitations of the float-zone methods. Two distinct procedures were employed to produce the molten zones in non-conducting materials. An electron beam technique utilizing a self-accelerated electron gun of annular geometry was the first process examined during the program. A second technique - the production of a floating zone by the use of a hollow cathode electrical discharge - was also developed. Both methods yielded single crystals of relatively high perfection as measured by the density of dislocations appearing in the grown crystals. Further evaluation is necessary to fully determine if the optical perfection of these crystals is commensurate with the stringent requirements demanded of a good laser crystal.
- Lasers and Masers
- Ceramics, Refractories and Glass