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本文采用硫氰酸金溶液对硫敏化的立方体溴化银乳剂分别进行潜影加强和过敏化处理,并与硫加金敏化的乳剂进行感光性能的比较。硫敏化的乳剂经过潜影加强处理,感光度有明显提高,表明金具有促进乳剂颗粒显影的作用。另一方面,硫敏化的乳剂经过潜影加强处理,感光度虽有提高,仍达不到硫加金敏化的效果,而硫敏化的乳剂经过过敏化处理能达到甚至超过硫加金敏化的效果。这暗示着金对于硫加金敏化乳剂颗粒在曝光过程中潜影的形成是有贡献的。 本文采用Dember效应测量了乳剂的离子电导率,并进行了信号衰减速率的动力学分析。结果表明,硫加金敏化的乳剂颗粒的离子电导率和一级衰减参数与硫敏化的乳剂颗粒的相比有减小的趋势。硫敏化的乳剂经过金盐溶液过敏化处理后,乳剂颗粒的离子电导率和一级衰减参数明显减小,从而验证了金盐法过敏化效应是由于增加了颗粒环境中的银离子浓度的机理。
In this paper, thiocyanate gold solution of sulfur-sensitized cubic silver bromide emulsions, respectively, to enhance the latent image and sensitization, and sulfur and gold sensitized emulsion photosensitivity were compared. Sulfur-sensitized emulsion through the latent image enhancement treatment, the sensitivity was significantly improved, indicating that gold has the role of promoting the development of emulsion particles. On the other hand, the sulfur-sensitized emulsion through the latent image enhancement treatment, although the sensitivity has not yet reached the effect of sulfur plus gold sensitization, and sensitized sulfur-sensitized emulsion can reach or exceed Sulfur plus gold sensitization Effect. This implies that gold contributes to the formation of latent images during the exposure of sulfur plus gold sensitized emulsion particles. In this paper, the ionic conductivity of emulsion was measured by Dember effect, and the dynamics of signal decay rate was analyzed. The results show that ionic conductivity and first-order decay parameters of SJ-sensitized emulsion tend to decrease compared with that of sulfur-sensitized emulsion. After the sensitized emulsion of sulfur sensitized emulsion, the ion conductivity and first-order decay parameters of emulsion particles decrease obviously, which verifies that the sensitization effect of gold salt is due to the increase of silver ion concentration in the granular environment mechanism.