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Precipitation and Calcination Processes for Yttrium Aluminum Garnet Precursors Synthesized by the Urea Method
Author(s) -
Matsushita Naoya,
Tsuchiya Noriyoshi,
Nakatsuka Katsuto,
Yanagitani Takakimi
Publication year - 1999
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.1151-2916.1999.tb02029.x
Subject(s) - yttrium , calcination , materials science , precipitation , crystallization , aluminium , inorganic chemistry , urea , sulfate , chemical engineering , mineralogy , metallurgy , chemistry , oxide , catalysis , biochemistry , physics , organic chemistry , meteorology , engineering
Yttrium aluminum garnet (YAG) precursors for transparent ceramics were synthesized by the urea method under various [urea]/[metal ions] ([U]/[M]) conditions. Monophase YAG was obtained from solutions with a high [U]/[M] ratio after calcination at a temperature of 1200°C. The condition of the precipitates seemed to indicate that the yttrium compounds had precipitated onto the aluminum compounds. The surface morphology and size of the particles were controlled by the [U]/[M] ratio. The different reaction sequences of YAG crystallization for low‐ and high‐ratio samples were dependent on morphology, size, and the quantity of chemical species that was precipitated as carbonate and/or sulfate compounds.