Electron Microscopic Techniques for Fluorescent Lamp Phosphor Studies by Single Stage Replication

Abstract

Electron Microscopy has long been utilized in the lamp industry for the study of tungsten and other lamp components. Little information has been published regarding the use of electron microscopy in the study of phosphors, a main component in fluorescent lamps. This study concerns calcium halophosphate phosphors, a primary component of fluorescent lamps.A modified single stage replica method similar to that of Munch has been adapted for use in the study of phosphors. The samples to be replicated were prepared by depositing the phosphor powder on a clean glass slide. Deposition was accomplished by a dry spray technique using low pressure Freon. A commercially available spray mounter can be utilized for this purpose. The critical parameter in the operation is pressure control, which when properly regulated promotes an even distribution of particles, and appears to facilitate subsequent removal of the evaporated film from the glass slide.