Abstract
Microstructure of the CaO-TiO2 mixture ground under dry atmospheric condition using a planetary ball mill was investigated by transmission electron microscopy-energy dispersive X-ray spectroscopy (TEM-EDX) and high resolution transmission electron microscopy (HR-TEM) with selected area electron diffraction (SAED) analysis. According to the TEM observation, the mixtures ground for about 2 h or more consist of many fine particles of about 20 nm. The CaTiO3 microcrystals are formed in the mixture ground for about 2 h or more. One of the lattice planes, {121} is clearly observed in the HR- TEM micrograph of the 5-h ground mixture, while the lattice image is partly detected in the mixture ground for about 2 h or less. The grains grow in size in the prolonged grinding, and their sizes reach about 20 nm at 5 h grinding by the TEM observation. The size of microcrystals becomes larger with increasing grinding time.
Original language | English |
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Pages (from-to) | 75-79 |
Number of pages | 5 |
Journal | Powder Technology |
Volume | 104 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1999 Aug 3 |
Externally published | Yes |
Keywords
- Dry grinding
- Microcrystal
- Microstructure
ASJC Scopus subject areas
- Chemical Engineering(all)