Purification of Cd and Te by zone refining

Details Purification of Cd and Te by zone refining Purification of Cd and Te by zone refining

1985-11-22

1987-09-01

Dixon, Jr., William R.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

75 65ZM, 156620, 156DIG66, 156DIG72, 156DIG92, 423510, C01B 1902, C30B 1302, C30B 1308

Patent

active

046907254

ABSTRACT:
Cd and Te are purified by multiple-pass zone refining in the presence of a small amount of an added gettering substance chosen from Cd, Te and CdTe. In the purification of Cd, Te, or CdTe is added, the amount of Te or of Te in CdTe being less than the amount of Te in the Cd-rich eutectic composition between Cd and Te. In the purification of Te, Cd or CdTe is added, the amount of Cd or of Cd in CdTe being less than the amount of Cd in the Te-rich eutectic composition between Cd and Te. The Cd and Te so purified have an improved purity as witnessed by SSMS analyses, the increased ductility of the Cd and a much higher yield of the number of slices of CdHgTe produced with the refined Cd and Te meeting the specifications for carrier concentration and mobility.

REFERENCES:
patent: 2739088 (1956-03-01), Pfann
patent: 3144357 (1964-08-01), Hulme et al.
patent: 3849205 (1974-11-01), Brau et al.
patent: 4003741 (1977-01-01), Gallet et al.
patent: 4011074 (1977-03-01), Dietl et al.
patent: 4507160 (1985-03-01), Beck et al.

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