草酸盐掺杂八面体溴化银颗粒乳剂的增感效应研究

使用反馈式微机控制双注乳化仪,在晶体生长过程中一定时间内,加入一定量的草酸盐,制得了草酸根离子处于晶体颗粒次表面的八面体溴化银微晶乳剂。考察其实验过程和测试其感光性能,结果表明:(1)草酸根掺杂于次表面的八面体溴化银乳剂与未掺杂乳剂相比较,无论是原始乳剂,还是经过化学增感,或用染料进行光谱增感后的乳剂,感光度均有明显提高(Sd/S0≥1.8),且其灰雾水平都不高,即具有明显的增感效应;(2)草酸根掺杂的乳剂可以与常规的硫加金化学增感,以及染料光谱增感一同进行协同增感,把乳剂的感光度提高到更高的水平。(3)草酸根掺杂的八面体溴化银乳剂的感光度增益,明显高于草酸根掺杂立方体溴化银乳剂。

Sensitization on Octahedral Silver Bromide Emulsion Doped with Oxalate

In the emulsifying process of AgBr microcrystals in the double-jet apparatus controlled by a microcomputer,a certain amount of oxalate salt was injected at specific time and pAg into a reactor to prepare octahedral AgBr grain emulsions in which oxalate ions were doped at subsurface of AgBr microcrystals.The observation results from the whole experiments and sensitometric results from these emulsions showed: 1) that the sensitivities(Sd) of oxalate-doped emulsions,relative to those(S0) of the corresponding u...