卤化银乳剂微晶体的结构与性能的研究——X.T颗粒乳剂的电学性质与感光性能

STUDY ON THE STRUCTURE AND PROERTIES OF SILVER HALIDE EMULSION MICRO-CRYSTALS——Ⅹ. T-Gran Emulsional Electric Character and Sensitive Property

实验结果表明,随着总含碘量的增加,乳剂的离子电导值迅速增加,而感光度在某一总含碘量时最大.增大碘溴化钾溶液中碘溴比,将导致碘向外层的均化,使离子电导增加.随着碘带向T颗粒边缘移动和其形态比的增加,乳剂的离子电导值也增加,而其感光度逐渐减小.本文用隙间银离子与光电子合理的匹配解释了感光度的变化.

The experimental observation shows that the ionic conductivity of T-Grain emulsion rapidly increases and the sensitivity has a top with the increase of total iodide content (0-25%mol). The increase of iodide-to-bromide ratio in potassium iodobromide solution results in the diffusion of iodide toward the edge band of T-Grain and the rise of its ionic conductivity. Emulsional ionic conductivity rises and the sensitivity declines when the iodide band moves toward the edge of T-Grain and the aspect ratio increases. The change of emulsional sensitivity was explained by rational matching of interstitial silver ions with photo-electrons in T-Grains.