Evaluation of internal structure of dense slurry with confocal scanning laser fluorescent microscopy

Abstract

Fine pores in high concentration slurries were observed directly by using the confocal scanning laser fluorescent microscopy. We focused on the fine pores which were remained after de-airing treatments of the slurry. In order to observe fine pores, we prepared transparent slurry which consists of SiO₂-glass powder particles and glycerol-water premix or aqueous sucrose solution, which refractive indexes were controlled to lessen scattering. Fine pores were identified and evaluated quantitatively from photo images.