TiN from TiO2 via cycling microwave

It has recently been shown that microwave heating can reduce the time for synthesising TiN by carbothermal reduction and nitridation. In particular, the TiO2/C mixture used as starting material initiates an effect denoted as the "self-burning phenomenon". High-purity TiO2 powders from four...

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Bibliographic Details
Published in:American Ceramic Society bulletin 2002-08, Vol.81 (8), p.57-60
Main Authors: PEELAMEDU, Ramesh D, ROY, Rustum, AGRAWAL, Dinesh, HURTT, Larry
Format: Magazinearticle
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Chemistry
Colloidal state and disperse state
Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...)
Exact sciences and technology
General and physical chemistry
Inorganic chemistry and origins of life
Miscellaneous
Powders
Preparations and properties
Technical ceramics
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Summary:It has recently been shown that microwave heating can reduce the time for synthesising TiN by carbothermal reduction and nitridation. In particular, the TiO2/C mixture used as starting material initiates an effect denoted as the "self-burning phenomenon". High-purity TiO2 powders from four different commercial sources were used together with activated charcoal powder to synthesise TiN powders using this microwave-induced self-burning cyclical process. Self-burning, during which the observed temperature cycles with an approx 40 s frequency, was seen in all cases and lasted for 30 min. The particle size distribution of the reactant and product powders was measured. It was shown that, regardless of identical experimental conditions, the starting powder characteristics significantly affect the particle shape and size distribution of the TiN powders.
ISSN:0002-7812
1945-2705