| 摘要 |
<p>PURPOSE:To facilitate the control of the particle size of produced CdS, by a method wherein the concentration of Cd ions in the reaction systems is gradually increased in the course of reaction of CdS. CONSTITUTION:An aqueous solution containing Cd ions such as CdSO4, CdCl2 or the like is brought together with H2S into a reaction system to produce photoconductive CdS. In this reaction systems, the concentration of Cd ions is increased from the beginning or from an intermediate portion of the process. The particle size of the product CdS is reduced as the rate of increase of Cd ion concentration becomes higher. The Cd ions may be beforehand added to the reaction system. Preferably, the Cd ion containing solution is introduced such that the Cd ion concentration is gradually increased at a rate ranging between 0 and 0.7mol/l.</p> |
