The domain structure of ferroelectric BaTiO3, crystal and ceramics wer
e directly observed with scanning electron acoustic microscope (SEAM).
Some new phenomena were revealed and the origin of the electron acous
tic signal on the domain structure was analyzed. Electron Acoustic Ima
ging of compound semiconductor heterostructure materials GaAs/.../Si a
nd residual stress distribution of structure ceramics ZrSiO4 and metal
Al were also shown in the paper.