| 摘要 |
PURPOSE:To prepare CdS having high sensitivity, providing high-quality images, by adding a proper amount of flux consisting of NaCl/CdCl2 to CdS containing a specific amount of Cu, calcining the prepared blend, heating it with Cu, sulfur compound, etc. in water. CONSTITUTION:CdS containing 4-10X10<-4>mol Cu based on 1mol CdS is blended with a mixed flux consisting of NaCl/CdCl2 in such a way that an amount of CdCl2 is 5-15mol%, the prepared blend is calcined in a temperature range from the melting point of the flux to a temperature 50 deg.C higher than it, to give a calcined material consisting of CdS particles having simple and small particle diameters. The calcined material is dispersed into water, crushed, blended with proper amounts of Cu and a compound such as thiourea, etc. to generate sulfur by heating, and heated at about 80 deg.C. Consequently, uniform one layer is precipitated on the surface of the CdS particles having small particle diameters to give CdS for electrophotography having raised uniformity of particle surface, improved resolving power, providing high-quality images, having improved durability.
|
