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Conversion of Alumina to Aluminum Nitride Using Polymeric Carbon Nitride as a Nitridation Reagent
Author(s) -
Jung WooSik
Publication year - 2016
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/jace.14152
Subject(s) - x ray photoelectron spectroscopy , nitride , raman spectroscopy , materials science , carbon nitride , reagent , calcination , magic angle spinning , carbon fibers , analytical chemistry (journal) , inorganic chemistry , nuclear magnetic resonance spectroscopy , chemical engineering , chemistry , catalysis , nanotechnology , layer (electronics) , organic chemistry , photocatalysis , composite material , physics , optics , composite number , engineering
Polymeric carbon nitride, which was synthesized by polymerization of dicyandiamide at 500°C, was used as a nitridation reagent in the conversion of δ‐alumina (δ‐Al 2 O 3 ) to aluminum nitride (AlN). The products obtained at various reaction temperatures were characterized by powder X‐ray diffraction, 27 Al magic‐angle spinning nuclear magnetic resonance ( MAS NMR ) spectroscopy, Raman spectroscopy, and X‐ray photoelectron spectroscopy ( XPS ). δ‐Al 2 O 3 began to convert to AlN at 900°C, which is the lowest temperature reported for the formation of AlN from Al 2 O 3 , and completely converted to AlN at 1400°C. The occurrence of reaction intermediates during nitridation was confirmed by 27 Al MAS NMR and XPS . The change in Raman spectra with reaction temperatures indicated that lattice defects in AlN were reduced by calcining at higher reaction temperatures.