Method of manufacturing bismuth germanate crystals

Details Method of manufacturing bismuth germanate crystals Method of manufacturing bismuth germanate crystals

1986-12-09

1987-11-24

Doll, John

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156604, 156624, 156DIG67, 156DIG79, 423393, 423617, 423618, C30B 1104, C30B 1108

Patent

active

047087633

ABSTRACT:
The invention relates to a method of manufacturing bismuth germanate (Bi.sub.4 Ge.sub.3 O.sub.12) crystals using the Bridgman technique. A high degree of crystal perfection and an acceptable level of inclusions are obtained by changing the stoichiometry of the starting mixture in favor of Bi.sub.2 O.sub.3, such that the starting mixture contains between 40.2 and 40.5 mol. % of Bi.sub.2 O.sub.3 and between 59.8 and 59.5 mol. % of GeO.sub.2.

REFERENCES:
patent: 1793672 (1931-02-01), Bridgman
patent: 2816050 (1957-12-01), Hunter
patent: 2835614 (1958-05-01), Pohl
patent: 3060065 (1962-10-01), Orem
patent: 3620686 (1971-11-01), Pfann
Speranskaya et al., The Bismuth Oxide-Germanium Dioxide System, Russian Journal of Inorganic Chemistry, vol. 9, No. 2, Feb. 1964, pp. 226-230.
Nitsche, Crystal Growth and Electro-Optic Effect of Bismuth Germanate, Journal of Applied Physics, vol. 36, No. 8, Aug. 1965, pp. 2358-2360.

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