STEM observation of Kaolin

Kaolin particles used for porcelain were observed on a tungsten SEM equipped with a STEM detector. Secondary electron images gave an overview of a secondary particle and its surface profile. STEM images of dispersed primary particles showed detailed shapes with even their inner structures at high magnification. EDX maps visualized the distribution of principal elements (Al & Si) and even a fine Zr particle with about 200 nm diameter.

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