硫族元素的化学增感

Chemical Sensitization by Sulfur Family Elements

硒碲化合物用作化学增感剂可以显著提高感光乳剂的感光度 ,但也带来增加灰雾和降低反差的缺点。为了克服这个难题 ,曾进行大量研究工作 ,主要在改进硒碲化合物的化学结构和觅找其在制备乳剂过程中应用的最佳工艺方法等方面。

Selenium and Tellurium compounds used as chemical sensitizers can increase significantly the speed of photographic emulsions,but can also draw the shortcoming of increasing the fog and decreasing the contrast.Aimed at overcoming these inconveniences,considerable research work was done,mainly on the improvement of the chemical structure of Se or Te compounds used and also on the technological method of using these compounds in the preparation of photographic emulsions.This paper presents a brief summary of recent advancements in this study.