Sol-gel α-Al2O3/Fe2O3 abrasive grains.
| Autor: | Bača, Ľuboš |
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| Další autoři: |
Pach, Ladislav, 1938-
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| Jazyk: | angličtina |
| Předmět: | |
| Druh dokumentu: | Non-fiction |
| Abstrakt: | Abstract: Boehmite derived alumina gels (grains and sticks) containing Fe2O3 in the range of 1 to 6 wt. % were sintered at 1350 °C for 3 hours. Relative density, strength and unexpectedly also the size of α-Al2O3 crystals increase with Fe2O3 content. A bimodal microstructure of anisotropic α-Al2O3 crystals is observed at and above 3 wt.% content of Fe2O3. Anisotropic growth of α-Al2O3 crystals is attributed to the presence of Fe²⁺ and to the specific nucleation effect of α-Fe2O3. Due to high strength and the relatively small size of α-Al2O3 crystals a Fe2O3 content of 3 wt.% seems most appropriate when applications of the material as abrasive grains are intended. |
| Databáze: | Katalog Knihovny AV ČR |
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