Electrochemical synthesis of ceramic materials. 2. Synthesis of AlN and an AlN polymer precursor: Chemistry and materials characterization

Journal Article · Wed Nov 18 04:00:00 EST 1992 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja00050a026· OSTI ID:269185

Wade, T; Park, J; Garza, E G ^[1]

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1. Univ. of New Mexico, Albuquerque, NM (United States); and others

A simple electrochemical method for the preparation of A1N and other metal nitride ceramic precursors is described. Constant-current electrolysis in a cell containing a NH{sub 4}Br/NH{sub 3} electrolyte solution and Al electrodes yields a solid mixture consisting primarily of Al(NH{sub 3}){sub 6}Br{sub 3} and [Al(NH{sub 2})(NH)]{sub n} after excess NH{sub 3} is removed. Calcination of this mixture above 600 {degrees}C in flowing NH{sub 3} results in elimination of Al NH{sub 3}{sub 6}Br{sub 3} and conversion of the A1N polymer precursor, [Al(NH{sub 2})(NH)]{sub n}, to high surface area AlN powder containing low levels of oxygen and carbon impurities. In this report, some electrochemical aspects of the AlN polymer precursor synthesis and processing are discussed. Characterization of the A1N powder before and after sintering is also discussed. 24 refs., 16 figs., 2 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 269185
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 24 Vol. 114; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM NITRIDES
CALCINATION
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYSIS
IMPURITIES
INORGANIC POLYMERS
SINTERING
SURFACE AREA