Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1794563 | Journal of Crystal Growth | 2008 | 5 Pages |
Abstract
It is shown that the melt growth of low-temperature phase aluminum beryllate crystals, Al2BeO4 (ABO), requires specific metastable conditions. These are, first of all, the melt pretreatment and insertion of a “cold” seed preserving the stability of its structure and providing a local decrease in melt temperature in the seeding zone. Contact of thermally treated melt with the high-temperature phase must be avoided as the melt loses its metastable state. The role of d-element dope in polymorphous transformations of ABO and narrowing of crystallization field of its high-temperature phase from melt is demonstrated. Some features of polymorphism and crystallization of ABO melt are interpreted in terms of associative complexing as the basis of mechanism of structure formation in condensed media.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
V.V. Gurov, E.G. Tsvetkov,