外延AgCl／AgBr乳剂感光性能的研究  

THE PHOTOGRAPHIC PROPERTY OF THE EPITAXIAL AgCl/AgBr EMULSION

作　　者：李晓玲[1] 周本茂[1] 

机构地区：[1]中国科学院感光化学研究所

出　　处：《感光科学与光化学》1994年第1期6-10,共5页Photographic Science and Photochemistry

摘　　要：制备系列ＡｇＣｌ／ＡｇＢｒ八面体外延乳剂，利用ＥＤＳ－ＳＴＥＭ技术对主体乳剂ＡｇＢｒ八面体上氯的分布进行了测定，结果表明随ＡｇＣｌ／ＡｇＢｒ外延乳剂中ＡｇＣｌ含量的增大，而其分布优势始终在ＡｇＢｒ八面体的顶角位置，其次在边。７７Ｋ时，用３７５ｎｍ的激发光源对外延乳剂ＡｇＣｌ／ＡｇＢｒ样品进行激发，随外延乳剂中ＡｇＣｌ含量的提高，ＡｇＣｌ的发光谱带有增大的趋势，但其峰位置基本保持在５１０ｎｍ左右，ＡｇＢｒ在６００ｎｍ．ＡｇＣｌ和ＡｇＢｒ的发光峰始终以分立的形式存在，没有混晶ＡｇＢｒＣｌ的宽谱带出现，外延乳剂ＡｇＣｌ／ＡｇＢｒ的感光度随ＡｇＣｌ含量的提高也有一定的变化规律，当ＡｇＣｌ含量较低时，有明显增感作用，而当ＡｇＣｌ含量过高时，外延乳剂的感光度降低，但灰雾也减小。A Series of epitaxial octahedral AgCl/AgBr emulsions have been prepared,and the chloride distributions of the epitaxial emulsion grains were measured by employing energydisperse spectroscopy-scanning transmissive electron microscopy(EDS-STEM).It wasfound that the prefered sites in AgCl growing on the host AgBr octahedral are alwaysthe corners,whatever the amount of AgCl is in the epitaxial AgCl/AgBr emulsion。The fluorescence of the AgCl became more abundant in increasing the ratio of AgCl to AgBr,while the emission wavelenthh maintained at 510 nm.The emission of AgBr appeared at 600 nm,no broad-band emission corresponding to AgBrCl was observed.The presenceof minor AgCl in the epitaxial AgCl/AgBr made the photographic sensitivity increasedapparently,nevertheless,high ratio of AgCl to AgBr led to the decrease of photographicsensitivity and fog.

关 键 词：外延乳剂 感光度 溴化银 氯化银 

分 类 号：TQ572.1[化学工程—精细化工]