ABSTRACT
High-resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM) was employed to investigate grain boundary structures, chemical compositions and chemical bondings of Zr-doped polycrystalline α-Al2O3. HRTEM revealed that there was no amorphous films at any grain boundary phases as well as no triple pocket was observed. From the O-K edge ELNES, no-apparent chemical shift nor changes of the shape of EELS were observed during this experiment. However, a slight modification due to structural changes became apparent after application of spatially differential ELNES method.
