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Fabrication and Characterization of Cordierite/Zircon Composites by Reaction Sintering: Formation Mechanism of Zircon
Author(s) -
Sun EnHai,
Kusunose Takafumi,
Sekino Tohru,
Niihara Koichi
Publication year - 2002
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.1151-2916.2002.tb00292.x
Subject(s) - cordierite , zircon , sintering , materials science , fabrication , composite material , characterization (materials science) , reaction mechanism , atmospheric temperature range , mineralogy , thermodynamics , chemistry , geology , catalysis , nanotechnology , geochemistry , ceramic , medicine , biochemistry , alternative medicine , physics , pathology
The formation mechanism of ZrSiO 4 in the cordierite‐ZrO 2 system was studied in the temperature range of 1250° to 1400°C by X‐ray diffraction analysis and discussed by analyzing experimental data using some reported reaction models. Nuclei growth models were found to describe the reaction well, and a satisfactory fit was obtained by applying the Avrami equation to estimate the reaction rate constant κ. Different values of the time exponent m were obtained at different temperatures: 0.32 at 1250°C, 0.34 at 1300°C, 0.39 at 1350°C, and 0.49 at 1400°C. The results indicate that there is a progressive change in reaction mechanism.