Phase transformations of alpha-Al₂O₃ during annealing in a reducing atmosphere
Study results of corundum structure transformations due to annealing of a-AI₂О₃ in Ar atmosphere containing a reducing component (СО + Н₂) at 1700-1900 ℃ are presented. It has been found that a polycrystalline layer containing new phases is formed at the single crystal surface during the anneal...
Збережено в:
| Дата: | 2005 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
НТК «Інститут монокристалів» НАН України
2005
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| Назва видання: | Functional Materials |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/139313 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Phase transformations of alpha-Al₂O₃ during annealing in a reducing atmosphere / A.Ya. Dan`ko, M.A. Rom, N.S. Sidelnikova, S.V. Nizhankovsky, L.A. Grin` // Functional Materials. — 2005. — Т. 12, № 4. — С. 725-730. — Бібліогр.: 10 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | Study results of corundum structure transformations due to annealing of a-AI₂О₃ in Ar atmosphere containing a reducing component (СО + Н₂) at 1700-1900 ℃ are presented. It has been found that a polycrystalline layer containing new phases is formed at the single crystal surface during the annealing under a high evaporation rate. One of those phases belongs to the AI₂О₃ cubic syngony (spinel) while another one has hexagonal structure (P63/mmc space group). А qualitative model has been proposed for the observed a-AI₂О₃ ➔ AIAI₂О₄ (spinel) transformation involving the hexagonal phase. |
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