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Stereography of growth of β″-Al2O3 single crystal films from sapphire substrates

✍ Scribed by Chu Kun Kuo; Patrick S. Nicholson

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
796 KB
Volume
84
Category
Article
ISSN
0167-2738

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✦ Synopsis

A model is presented that simulates the growth of Na-P"-A120, single-crystal films from sapphire substrates in alkali atmospheres. The formation of v-AI,O, occurs via Na-0 insertion, cr-Al,O, oxygen lattice transition and A13+ ion redistribution. Calculations are presented, based on the chemical and structural free energy changes and the stresses induced by the necessary structural mismatch. Oxygen diffusion is examined at 123% 1350°C on the basis of the model proposed and the microstructure development explained.

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