硫化镉(CdS)是重要的无机光导体之一。由于它对可见光的特殊敏感性,因而在制造可见光范围的光电、电光变换元件方面得到了广泛的应用。实践证明,适于上述用途的硫化镉,不仅要求其重金属杂质的含量小于1ppm,而且要求其结构紧密和有较好的流动性。实验用的基本原料为试剂二级硫酸镉,并经色层分离后,其中所含的重金属杂质Cu、Co、Ni 和Pb 不 Cadmium sulfide (CdS) is one of the important inorganic photoconductors. Due to its special sensitivity to visible light, it has been widely used in the manufacture of photoelectric, electro-optical transducers in the visible range. Practice has proved that suitable for the above uses of cadmium sulfide, not only requires its content of heavy metal impurities less than 1ppm, and requires its compact structure and better fluidity. The basic raw materials used in the experiment are cadmium sulfate reagent, and after the color separation, the heavy metal impurities Cu, Co, Ni and Pb contained therein are not