卤化银乳剂微晶体的离子电导及其表面空间电荷层

卤化银乳剂微晶体的离子电导及其表面空间电荷层 IONIC CONDUCTIVITY AND SURFACE SPACE CHARGE LAYER IN MICROCRYSTALS OF GELATIN SILVER HALIDE EMULSION 彭必先 Peng Bixian 1 first-author 彭彦彬 Peng Yanbin 1 李振兴 Li Zhenxing and Wang Ronqin 1 王荣琴 1 高秀林 1 吴学汉 1 范素月 1 陈丽娟 1 汪文石 1 关建华 1 程学新 1 贾燕明 1 中国科学院感光化学研究所 中国科学院感光化学研究所 Institute of Photographic Chemistry, Academia Sinica Institute of Photographic Chemistry, Academia Sinica 由半导体卤化银和绝缘性的明胶蛋白组成的感光乳剂层,可以看作是一种复合介质,后者在交变电场内,显示出称为Maxwell-Wagner效应的介电色散现象。利用介电损耗法研究了各种不同的测定条件,如真空度和含湿量对乳剂微晶体的离子电导的影响。在不同交变电场频率下,测定了杂质成份、卤化物本性、晶体惯态、化学增感方式和稳定剂的加入对于微晶体的介电损耗的影响。从这些测定结果,提出并讨论了卤化银乳剂微晶体的离子电导与表面空间电荷层的性质变化的某些规律。 The photographic emulsion which consists of conductive silver halide microcrystals embeded in insulating gelatin can be regarded as a heterogeneous medium showing the interface polarization called the Maxwell-Wagner effect. The effects of various measuring conditions, such as degassing degree, moisture content, upon the ionic conductivity of emulsion microcrystals have been studied with the aid of dielectric loss method. The change of dielectric loss of photographic emulsions versus frequency was determined as a function of silver halide type, crystal habit, the addition of various chemical sensitizers, stabilizers and doppants. From these measurements, ionic conductivity and, in some cases, the characteristics of space charge layer for a range of silver halide emulsion microcrystals are presented and discussed. 1983-04-01 2021-04-01 4