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Synthesis of BaTaO 2 N Powders Utilizing NH 3 Decomposition
Author(s) -
Brophy Matthew R.,
Pilgrim Steven M.,
Schulze Walter A.
Publication year - 2011
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.1551-2916.2011.04826.x
Subject(s) - ammonia , decomposition , chemistry , inert gas , inert , phase (matter) , analytical chemistry (journal) , chemical engineering , chromatography , organic chemistry , engineering
The current methodology for perovskite oxynitride synthesis is a gas–solid reaction with ammonia. However, a competing reaction exists, where ammonia dissociates to inert N 2 , rather than a nascent, active nitriding species. Therefore, oxynitride synthesis is controlled by the composition of the gas phase. Control of key processing variables (temperature, flow velocity, sample placement, temperature distribution, furnace configuration) determines the gas‐phase components ( NH 3 , N 2 , and H 2 ) and subsequently, the reaction rate and purity of BaTaO 2 N powders.