Journal
CERAMICS INTERNATIONAL
Volume 32, Issue 3, Pages 309-312Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2005.03.007
Keywords
calcination; powders : chemical preparation; LuAG
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Lutetium aluminium garnet (LuAG) precursor was co-precipitated from a mixed Solution of aluminum and lutetium nitrates using ammonia water as precipitant. Phase evolution and thermal decomposition of the precursor during calcination was studied by TG-DSC and XRD. The particle size and morphology of the synthesized powders were determined by TEM. It was found that the precursor was amorphous and transformed to pure LuAG at about 900 degrees C. The crystal lization stage was characterized by an exothermic peak of DSC curve at 1032 degrees C. The resultant LuAG powders were loosely agglomerated with an average particle size 50 nm. The addition of small amount of ammonia sulfate to mixed Solution reduces the agglomeration and produces more uniform spherical particle. (c) 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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