Abstract
Alumina-zirconia powder (AZ) was prepared by thermal decomposition of organic precursors synthesized from ethyl acetoacetate aluminium diisopropoxide and zirconium tetra-n-butoxide. The specific surface area of AZ was higher than that of alumina-zirconia powder (ALK) prepared from aluminium tri-sec-butoxide and zirconium tetra-n-butoxide in the range of 0-40 mol% ZrO 2. The pore radius for AZ containing 0-40 mol% ZrO 2 distributed from 1 to 3 nm. The true density of AZ was lower than that of ALK in the range of 0-40 mol% ZrO 2. Four- and 6-coordinated Al atoms existed in ZrO 2-free AZ, while 5-coordinated Al atoms in addition to 4- and 6-coordinated Al atoms existed in AZ containing 20-80 mol% ZrO 2. These results indicate that alumina component and zirconia component in AZ were mixed homogeneously at the atomic level.
| Original language | English |
|---|---|
| Pages (from-to) | 155-159 |
| Number of pages | 5 |
| Journal | Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan |
| Volume | 106 |
| Issue number | 2 |
| Publication status | Published - 1998 |
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Keywords
- Al MAS-NMR
- Alumina-zirconia powder
- Aluminium chelate compound
- Pore size distribution
- Specific surface area
- True density
- Zirconium alkoxide
ASJC Scopus subject areas
- Ceramics and Composites