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Growth Rate Calculations for Edge‐Defined, Film‐Fed Growth of Sapphire Crystals
Author(s) -
Bruni Frank J.
Publication year - 2021
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.202000244
Subject(s) - enhanced data rates for gsm evolution , sapphire , surface tension , crystal (programming language) , growth rate , crystal growth , materials science , surface (topology) , tension (geology) , condensed matter physics , optics , crystallography , chemistry , thermodynamics , mathematics , geometry , physics , composite material , computer science , telecommunications , laser , programming language , ultimate tensile strength
A new model for the calculation of the growth rate of edge‐defined, film‐fed growth (EFG) crystals is proposed based on surface tension proportional to the area of the crystal/die interface. A comparison to the classical model, which includes a surface tension factor proportional to the length of the crystal's peripheral edge, is shown. Equations are derived that accurately predict the growth rate derived from weight versus time calculations. Examples are shown for various geometries of crystal shape.