Production of cadmium sulfide compositions having unusual magnet

Details Production of cadmium sulfide compositions having unusual magnet Production of cadmium sulfide compositions having unusual magnet

1981-07-16

1984-05-22

Cooper, Jack

Compositions

Magnetic

Chromium or chromium compound containing

252 623ZT, 252518, 423561B, C04B 3500, C01G 1102

Patent

active

044500866

ABSTRACT:
Process for preparing cadmium sulfide compositions which are in a metasta state possessing greatly increased electrical conductivity and magnetic properties. The process comprises pressure quenching a cadmium sulfide composition containing between about 0.5% and 3.0% by weight chlorine, obtained by precipitation of CdS from aqueous CdCl.sub.2 solution with H.sub.2 S, to produce a precipitate containing a mixture of CdS and a complex compound of CdCl.sub.2 and CdS, which is washed with water to remove uncomplexed CdCl.sub.2. The pressure quenching treatment involves suddenly releasing the cadmium sulfide composition from a high pressure of at least 32 K bars at rates of at least 10.sup.4 bars/sec.

REFERENCES:
patent: 3058807 (1962-10-01), Sedgwick
Sato, "Applied Physics" (Japan), vol. 35, No. 6, 1966, pp. 388-392.
Horman et al., "Solid State Communications" 32, pp. 521-524 (1979).

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