PUBLISHED PAPERS #01.09
| Vagif Nasirov, Razim Bayramli, Emin Nasirov, Ulkar Abdurahmanova. Characteristic Features of Polymorphic Transformations in Solid Solutions of Nitrate Compounds of Alkali Metals |
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| Abstract. Optical microscopic and X-ray studies were conducted on KNO3-RbNO3, KNO3-CsNO3 and KNO3-AgNO3 solid solution monocrystals grown by isothermal crystallization, and as a result of these studies a number of properties characteristic of polymorphic transformations were identified in these samples. As a result of morphological studies, it was determined that polymorphic transformations in these samples occur with the formation and growth of a new crystal nucleus within the parent crystal. The nucleus of the newly formed phase crystal always first grows in the [100] crystallographic direction, and after growth in this direction is complete, in the [001] direction. In all cases, the crystal growth in the [100] direction is greater than that in the [001] direction. Overall, the results obtained and the good agreement of these results with M. Folmer's two-dimensional nucleation mechanism of crystal growth from the liquid phase indicate that crystal growth occurs by a two-dimensional mechanism during polymorphic transformations in the studied samples. |
| Keywords: polymorphic transformations, solid solutions, equilibrium temperature, monocrystalline, activation energy |
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| DOI: https://doi.org/10.30546/MaCoSEP2025.008 |