直流极化法对溴化银T颗粒乳剂电性能的研究

采用Wagner直流极化法对溴化银T颗粒乳剂的电性能作了研究.研究结果表明,未经光照的溴化银T颗粒乳剂具有一定的电子电导率.与曝光后的溴化银T颗粒乳剂相比,未经光照的溴化银T颗粒乳剂具有更高的电子电导率.另外,在未经光照的卤化银乳剂微晶体中,如果添加防灰雾剂,其电子电导率会明显上升.感光乳剂电性能的变化反映出溴化银乳剂微晶体内自由电子与填隙银离子结合的状态.本文还从分子结构的角度探讨了四氮唑等防灰雾剂对溴化银乳剂微晶体自由电子与填隙银离子结合的阻滞作用.

Study on the Silver Bromide Tabular Grain Emulsion by Applying Wagner Polarization

Applying Wagner Polarization,the electric properties of silver bromide tabular grain emulsions were studied.According to the study the unexposed tabular grain did possess certain amount of electron conductivity,which was comparatively higher than that of the exposed tabular grains.When anti-fog agents were added,the tabular grain showed a significant increase of its electron conductivity.This variance revealed the state of the combination of free electrons with interstitial silver ions within the silver bromide emulsion crystals.The retardant effect of thiohydrotetrazole,a typical anti-fog agent,was also illustrated from the viewpoint of its molecular structure.