Preparation of photoconductive cadmium sulfide

Abstract

Abstract PURPOSE:In calcining CdS powder together with a flux, removing the flux, and calcining it again, to obtain photoconductive CdS having high sensitivity, by controlling the cooling rate after heating in at least one calcination. CONSTITUTION:A flux consisting of one or more of CdCl2, NaCl, KCl, etc. is added to CdS powder, which is calcined at 400-600 deg.C. The calcined CdS is cooled at a cooling rate of <=1.0 deg.C/min, preferably <=0.2 deg.C/min until the temperature is lowered to <=200 deg.C. The cooled CdS is washed with water so that the flux is removed, CdS is calcined again at 400-600 deg.C, and cooled, to give photoconductive CdS having the property. The influence of the cooling rate after the second calcination is relatively lower than the first cooling rate.

Inventors

• 👤 Fumio Sumino
• 👤 文男 角野
• 👤 Kiyoshi Suzuki
• 👤 鈴木　洌
• 👤 Masabumi Hisamura
• 👤 久村　正文

Bibliographic Details