CaWO_4核/卤化银壳光敏微晶的制备及性能研究  

STUDY ON THE PREPARATION AND PROPERTY OF LIGHT-SENSITIVE CaWO 4 CORE/AgX SHELL MICROCRYSTAL EMULSION

作　　者：郭新民[1] 王素娥[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》1998年第4期289-294,共6页Photographic Science and Photochemistry

基　　金：中科院应用研究与发展重点项目;国家自然科学基金;美国柯达公司资助项目

摘　　要：用于感光材料的卤化银微晶合成技术近二十年来取得了很大进展，合成出了诸如Ｔ－颗粒、核壳乳剂和外延复合颗粒等，使感光材料的性能日趋优异．但由于感光化学反应（如化学增感、光谱增感、潜影形成及显影过程等）基本上都发生在微晶的表面，而微晶核内部的卤化银却未发生...A new kind of light-sensitive CaWO 4 core/AgX shell microcrystal emulsion was first synthesized. The outer structures of CaWO 4 core/AgX shell microcrystal emulsion were observed by TEM and SEM, and the photographic properties of the emulsions were tested with X-ray and white light exposure. The results show that photographic property of the emulsion is obviously affected by AgNO 3 displacement percentage, time of KBr displacement and pBr value in displacement process. The thickness of AgX shell on the CaWO 4 core is about 10-15% of the microcrystal diameter. Since CaWO 4 core can absorb X-ray to emit fluorescence to expose the AgX shelled on the surface of CaWO 4 core from internal direction, therefore, the sensitivity of these heterophase microcrystals, comparing with the common cubic AgBr emulsion in the same condition under X-ray and white light exposure, is increased, and is ten and sixteen times higher than that of cubic AgBr emulsion. In a word ,these results show that CaWO 4 core/AgX shell microcrystal emulsion obviously has overwhelmingly advantages over common AgBr emulsion,can largely save valuable Ag, and is a promising information-recording material.

关 键 词：钨酸钙 非银核 卤化银壳 光敏微晶 卤化银乳剂 

分 类 号：TQ572.1[化学工程—精细化工]