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

C - Chemistry, Metallurgy

22

B

23/328, 53/330

C22B 17/06 (2006.01) C01B 19/00 (2006.01) C01B 19/02 (2006.01) C22B 9/02 (2006.01) C22B 9/16 (2006.01) C22B 61/00 (2006.01) C30B 13/00 (2006.01) C30B 29/02 (2006.01)

Patent

CA 1254718

ABSTRACT OF THE DISCLOSURE 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 purifica- tion 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 purifica- tion 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.

514220

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