α-Al2O3 can be sintered at lower temperatures when derived from a seeded boehmite gel. The extended vermicular microstructure, which is characteristic of α-Al2O3 derived from Al2O3 precursors, is avoided by using a large number of seed particles. The scale and uniformity of the microstructure formed by the in situ growth of α-Al2O3 are the key factors that allow for low-temperature sintering. Herring's scaling law can be used to predict the approximate sintering temperature and demonstrates that, if scale of microstructure can be reduced to <20 nm, sintering below 1000 °C may be possible.
|Original language||English (US)|
|Number of pages||4|
|Specialist publication||American Ceramic Society Bulletin|
|State||Published - Oct 1 1994|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites