Crystal growth on Hg.sub.3 TeO.sub.6

Details Crystal growth on Hg.sub.3 TeO.sub.6 Crystal growth on Hg.sub.3 TeO.sub.6

1975-01-31

1976-03-02

Yudkoff, Norman

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

423508, 423592, 23300, 23305R, 23273R, B01J 1704, C01G 1300

Patent

active

039416488

ABSTRACT:
Single crystals of Hg.sub.3 TeO.sub.6, which are useful in, for example, acousto-optic applications, are grown on rotating seed crystals in aqueous solution at an elevated temperature. A two-step process is employed in which supersaturation is achieved by a substantially homogeneous increase in pH throughout the solution under substantially isothermal conditions, followed by a decrease in temperature at substantially constant pH. The homogeneous increase in pH is attained by adding a compound such as urea whose rate of hydrolysis may be controlled by solution pH and temperature. The use of such a compound ensures thorough mixing of the compound in the solution before the compound hydrolyzes to produce a pH-altering substance.

REFERENCES:
patent: 3309168 (1967-03-01), Boyer
patent: 3622399 (1971-11-01), Johnson
J. of Amer. Chem. Soc., Hutchins, 1905, pp. 1157- 1123, Vol. 27.
Chemical Reviews, Dulton et al., Dec. 1966, Vol. 6, No. 6, pp. 657- 675.
Journal of Less Common Metals, 23, 1971, pp. 313- 315, (printed Netherlands).
Transaction of Electro-Chem. Soc., Vol. 61, 1932, pp. 113- 121.

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