Process for producing stable divalent scandium

Details Process for producing stable divalent scandium Process for producing stable divalent scandium

1997-09-30

2000-10-03

Meeks, Timothy

Coating processes

Coating by vapor, gas, or smoke

Metal coating

42725521, 4273833, C23C 1424

Patent

active

061269956

ABSTRACT:
A method for producing divalent scandium includes heating, at a mildly elted temperature above 20.degree. C. under reduced pressure, a calcium difluoride crystal sample doped with scandium trifluoride to drive off atmospheric impurities, heating at an intermediate temperature above 150.degree. C. calcium metal under reduced pressure to drive off volatile impurities, heating calcium metal at a migrating below 900.degree. C. to evaporate calcium and to deposit it on the sample, and heating the sample at a diffusion and reaction temperature below 950.degree. C. to diffuse calcium into the sample and to cause formation of the divalent scandium.

REFERENCES:
patent: 3836387 (1974-09-01), Roblin et al.
patent: 5471493 (1995-11-01), Mirov et al.

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