Method of orienting seed crystals in a melt, and product obtaine

Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step

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156DIG61, 156DIG65, 23305A, 106 42, 106 65, 106 734, 423625, B01J 1708, C01F 702

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active

040960250

ABSTRACT:
A method for the production of improved, transparent single crystals having a corundum structure under conditions of minimum thermal strain, comprising the optimum orientation of growth planes of a seed crystal in a melt substantially parallel to the vertical side wall means of a crucible, and heating and subsequent cooling the melt, thereby nucleating on the seed crystal.

REFERENCES:
patent: 2979413 (1961-04-01), Ballman
patent: 3011870 (1961-12-01), Webb
patent: 3075831 (1963-01-01), Remeika
patent: 3527574 (1970-09-01), La Belle, Jr.
patent: 3598169 (1971-08-01), Copley
patent: 3608050 (1971-09-01), Carman
patent: 3653432 (1972-04-01), Schmid
patent: 3715194 (1973-02-01), Plooster
patent: 3898051 (1975-08-01), Schmid
Kronberg: Plastic Deformation of Sapphire, Arta Metallurgica, vol. 5, 1957, p. 508 to 5244 Dwg.
Sahagian et al., Crystal Perfection of .alpha.-Al.sub.2 O.sub.3 as a Function of Growth Method, Conf. on Growth of Crystals, USSR, (20-21, Jul. 1966), pp. 183-194.
Yamamoto, et al., Sci. Rep. Res. Inst. Tohokio Univ. A, (Japan), vol. 22, #4, Feb. 1971, pp. 156-164.

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