Internal structure analysis of mica particles coated with metal oxide by transmission electron microscopy

摘要

The morphology and internal structure of mica particles coated with metal oxide,TiO_2,produced by the hydrolysis method were investigated by transmission electron microscopy on thin sections prepared by means of a specially designed sample preparation technique.Cross-sectional TEM images clearly revealed the comparatively uniform thickness and composition of the TiO_2 layer as a component of the particles.It was found that the TiO_2 layer was composed of randomly oriented small particles about 50 nm in diameter with small variation of the diameter depending on the position in a mica particle,while near the surface of the mica particle a monolayer of TiO_2 oxide was observed.