Premium
Carbothermal synthesis of titanium nitride (TiN): Kinetics and mechanism
Author(s) -
Ortega A.,
Roldan M. A.,
Real C.
Publication year - 2005
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.20110
Subject(s) - tin , chemistry , kinetics , carbothermic reaction , isothermal process , activation energy , thermodynamics , titanium nitride , reaction rate constant , nitride , rate equation , kinetic energy , atmospheric temperature range , chemical engineering , organic chemistry , phase (matter) , physics , layer (electronics) , quantum mechanics , engineering
Abstract Constant rate thermal analysis (CRTA) has been used for studying the kinetics of the carbothermal reduction of anatase in nitrogen. It is noteworthy to point out the ability of CRTA method for discriminating the kinetic law of solid‐state reactions with considerably higher precision than conventional (TG, DTA, isothermal etc.) methods. The precise control of the reaction rate implies either direct or indirect control of both the partial pressure of CO generated in the reaction and the heat evolution rate, which allows to minimize the influence of heat and mass transfer phenomena. It has been shown that this synthesis is best described by a Johnson–Mehl–Avrami (with n = 2) kinetic model with an activation energy that fall in the range 162–165 kJ mol −1 . Finally the results reported here constitute the first attempt to use the new CRTA method to study the kinetics of the carbothermal synthesis of TiN. © 2005 Wiley Periodicals, Inc. Int J Chem Kinet 37: 566–571, 2005