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Hydrothermal Crystallization of Yttrium‐Iron Garnet on a Seed
Author(s) -
LAUDISE R. A.,
KOLB E. D.
Publication year - 1962
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1962.tb11078.x
Subject(s) - yttrium , crystallization , hydrothermal circulation , dissolution , platinum , materials science , hydrogen , yttrium iron garnet , mineralogy , crystal (programming language) , phase (matter) , analytical chemistry (journal) , chemical engineering , metallurgy , chemistry , chromatography , catalysis , biochemistry , physics , organic chemistry , quantum mechanics , computer science , engineering , programming language , oxide
Yttrium‐iron garnet has been shown to be the stable solid phase, congruently saturating, and not subject to reduction in 50 wt% NaOH between 350° and 425°C at pressures from 200 to 1350 atm. Substantial diffusivity of hydrogen through platinum and gold has been shown to lead to the formation of Fe 3 O 4 in garnet syntheses attempted in platinum or gold capsules where water was the pressure‐transmitting fluid. Yttrium‐iron garnet has been grown on a seed crystal under the following conditions: crystallization temperature, 370°C; dissolving temperature, 420°C; pressure, 200 atm; and solvent, 50 wt% NaOH. The rate of crystallization was 0.08 mm per day in the (111) direction.