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Synthesis of Submicrometer Titanium Carbide Powders
Author(s) -
Koc Rasit,
Folmer Jeffrey S.
Publication year - 1997
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.1151-2916.1997.tb02926.x
Subject(s) - carbothermic reaction , materials science , economies of agglomeration , chemical engineering , titanium carbide , titanium , carbon fibers , carbide , particle size , metallurgy , specific surface area , particle (ecology) , oxygen , composite material , catalysis , chemistry , composite number , organic chemistry , oceanography , engineering , geology
A novel synthesis process, based on a carbothermal reduction of titania, has been developed for producing high–purity, submicrometer, and nonagglomerated titanium carbide powders. The process utilizes a carbothermic reduction reaction of novel coated precursor powders that has potential as a high–quality (submicrometer and high–purity) powder synthesis route. The precursor is derived from a titania (TiO 2 ) and a hydrocarbon (C 3 H 6 ) gas and provides high contact area between the reactants. This yields a better distribution of carbon within the titania and inhibits the agglomeration among the titania particles, resulting in a more complete reaction and a purer product at a comparatively low temperature. The TiC powders produced at 1550°C for 4 h under argon gas flow have oxygen content of 0.6 wt% and total carbon content of 22.9 wt%, a very fine particle size (,0.1μm) (surface area of about 20 m 2 /g), uniform shape, and loose agglomeration.