多分散溴碘化银乳剂的离子电导性质及表面空间电荷层

• 作 者: 程学新 彭必先
• 机 构: 中国科学院感光化学研究所,中国科学院感光化学研究所
• 出 处: 感光科学与光化学
• 发表日期: 1986年02期
• 关键词: 离子电导 空间电荷层 表面电位 碘含量 活化能 卤化银微晶 沉降法 感光性能 填隙 银离子

采用酶解沉降法将碘含量为6mol％的多分散的溴碘化银乳剂分成9个级份,测量各个级份的乳剂在不同温度下的离子电导率,求出它们的离子电导活化能和表面空间电荷层的特性参数。发现各个级份乳剂之间在离子电导性质上有很大的差异。随着碘含量的下降,离子电导活化能从0.30eV上升到0.41eV,同时表面电位也相对地变得越来越正。相应地它们的填隙银离子生成能也越来越大。还讨论了这些差异对各级乳剂的照相性能的影响。

The polydispersed silver bromoiodide emulsion with 6mol% iodine content was separated into 9 fractions by enzymolysis sedimentation method. The ionic conductivities of emulsions at different temperatures were measured, and their ionic conductivity activation energy and surface area The characteristic parameters of the charge layer. It was found that there was a large difference in ionic conductivity between the emulsions of each grade. As the iodine content decreases, the ionic conductance can increase from 0.30eV to 0.41eV, and the surface potential becomes relatively more and more positive. Accordingly, their interstitial silver ion generation can also be larger and larger. The effect of these differences on the photographic performance of the emulsion at all levels is also discussed.