铑盐对氯溴化银乳剂照相性能的影响

Effect of NaRhCl_6 on the Photographic Performance for Silver Chloride-bromide Emulsions

采用计算机控制的双注技术制备氯溴化银乳剂,通过掺杂铑盐以改善卤化银乳剂的照相性能。本文主要研究了铑盐用量对高氯乳剂照相性能的影响,并利用扫描电镜和粒度分析表征来揭示其可能的影响机制。实验结果表明:铑盐的引入,使制备的氯溴化银乳剂具有更优的照相性能,其中反差的增大最为明显。但铑盐减感作用明显,其用量应在保持照相性能协调的前提下进行确定。

Silver chloride-bromide emulsions used in this investigation were synthesized with a double jet precipitation technique controlled by a computer.NaRhCl 6 was introduced to promote the photographic performance of silver chloride-bromide emulsions.The influence of content for NaRhCl 6 was mainly investigated in this text.The obtained emulsions were characterized by scanning electron microscopy（SEM） and particle size analysis.It was found that NaRhCl 6 worked as a dopant to improve the photographic performance of silver chloride-bromide emulsions,especially for the contrasts.Because of its properties as a long-lived electron trap,the content of NaRhCl 6 should be determined at the premise of good photographic performance.