Process for producing crystals

Details Process for producing crystals Process for producing crystals

1985-06-13

1987-07-07

Straub, Gary P.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156621, 423305, 423311, C30B 2914, C30B 710, C01B 2526

Patent

active

046785353

ABSTRACT:
In a process for producing crystals in crystallographic point group 32 and corresponding to the comprehensive chemical formula APO.sub.4, wherein symbol A is a chemical element taken from the group Al and Ga, P is phosphorus and O is oxygen, from heated solutions of salts of group A in phosphorus acid, the application of acid concentrations within the range of 12.5 to 20 mol/l, solution temperatures within the range of 110.degree. to 190.degree. C. and total pressures within the range of prevailing static vapour pressure to 2.5 bar provides a simple, safe and cost-effective method of producing perfect, flawless crystals.

REFERENCES:
patent: 4247358 (1981-01-01), Auloir
patent: 4382840 (1983-05-01), Chai et al.
patent: 4579622 (1986-04-01), Caporaso et al.
Kolb et al., Jl of Crystal Growth 50 (1980) 404-18.
Poignant et al., Mat Res. Bull., vol. 14, No. 5, pp. 603-612, 1979.
Perloff, Jl. of Am. Ceramic Soc., vol. 39, No. 3, 3/1/56.

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