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应用常规感光测定法、电镜法、介电损耗仪和微波光导仪研究了Fe~(3+)对卤化根乳剂微晶的掺杂效应,结果表明:Fe~(3+)使卤化银乳剂的感光度降低,灰雾降低,而反差变化不大。电镜观察和介电损耗测量表明:Fe~(3+)在物理成熟过程中对乳剂颗粒大小和离子电导率的影响不大,而微波光导数据表明,掺杂对电子电导的影响是明显的。上述结果表明:在AgBr中,Fe~(3+)起了深的电子陷阱作用,使光电子徙动路程缩短,影响潜影的形成效率。
The doping effects of Fe 3+ on the crystallites of halide-based emulsions were studied by means of conventional sensitometry, electron microscopy, dielectric loss spectroscopy and microwave photoconductivity. The results show that the doping effect of Fe 3+ on silver halide emulsions Sensitivity decreased, fog reduced, while the contrast changed little. Electron microscopy and dielectric loss measurements showed that Fe 3+ had little effect on the particle size and ionic conductivity of the emulsion during physical maturation. However, microwave photoconduction data showed that the effect of doping on electron conductance was significant. The above results show that in AgBr, Fe ~ (3+) plays a deep role of electron trapping, which shortens the photoelectron migration path and affects the formation efficiency of latent images.