影像科学与光化学 ›› 1997, Vol. 15 ›› Issue (2): 101-103.DOI: 10.7517/j.issn.1674-0475.1997.02.101

• 研究快讯 • 上一篇    下一篇

碘和硫增感剂在卤化银颗粒表面的分布

李金培, 王素娥   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1996-12-09 修回日期:1997-02-17 出版日期:1997-05-20 发布日期:1997-05-20
  • 通讯作者: 李金培
  • 基金资助:
    柯达公司资助

DISTRIBUTION OF IODIDE AND SULPHUR ATSILVER HALIDE MICROCRYSTAL SURFACE

LI Jinpei, WANG Su’e   

  1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China
  • Received:1996-12-09 Revised:1997-02-17 Online:1997-05-20 Published:1997-05-20

摘要: 碘在卤化银微晶中的含量和分布对感光度的影响引起乳剂配方设计者的广泛注意和重视.颗粒中的碘引起其内部结构和表面结构的改变,导致微晶颗粒表面化学及物理性质的改变,从而引起增感敏化斑的位置、分布以及随后潜影斑、灰雾斑的形成等一系列的变化并最终影响乳剂的感光性能.如果我们想有效地控制卤化银乳剂的感光度、灰雾、反差等一系列感光性能,必须调整卤化银乳剂颗粒的表面结构.

关键词: 碘化银, 硫增感, 软硬酸碱原理

Abstract: Distribution of iodide and sulphur at the surface of cubic silver bromide microcrystal was studied. The observation and determination of which by the methods of STEM and EDS found that the conversion of AgBr to AgI may form high iodide content island at the crystal surface and sulphur sensitization specks prefer to form at this high iodide region. The principle of hard and soft acid and base is applied to analysis this phenomenon.

Key words: Silver iodide, Sulphur sensitization, principle of Hard and soft acid and base