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J. Korean Ceram. Soc. > Volume 39(10); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(10): 907.
doi: https://doi.org/10.4191/kcers.2002.39.10.907
Effect of Surface Energy Anisotropy on the Equilibrium Shape of Sapphire Crystal
Jung-Hae Choi
Center for Microstructure Science of Materials and School of Materials Science and Engineering College of Engineering, Seoul National University
Using the two-dimensional Wulff plot, the equilibrium shape of a sapphire crystal was investigated as a function of surface energy anisotropy. Depending on the relative values of surface energy for various facet planes, the projected shape of equilibrium sapphire was determined to be rectangle, parallelogram, hexagon or octagon. The results are compared with the experimentally observed shapes of internal cavities of submicron range in sapphire single crystals.
Key words: Equilibrium shape, Sapphire, Surface energy anisotropy
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