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Alkoxide Sol‐Gel‐Processed Cordierite Fiber
Author(s) -
Tsai MuTsun
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.tb00329.x
Subject(s) - cordierite , microstructure , materials science , crystallization , alkoxide , fiber , porosity , amorphous solid , sol gel , composite material , phase (matter) , chemical engineering , mineralogy , chemistry , crystallography , catalysis , nanotechnology , ceramic , organic chemistry , engineering
An alkoxide sol‐gel route was developed to prepare stoichometric cordierite fibers. The influences of the aging treatment and heating rate on the sinterability of the gel fibers were also examined. X‐ray diffraction analysis revealed that the unaged and aged fibrous gels all remained amorphous <800&, but began crystallization into μ‐cordierite and α‐cordierite at ∼900°C and 1050°C, respectively; single‐phase α‐cordierite fibers were obtained at 1300°C. Heating the unaged fibers yielded denser microstructures, with fine grain sizes of ∼0.2–0.4 μm, whereas the aged fibers exhibited porous microstructures following heating at 1300°C. A higher heating rate and aging treatment resulted in a higher open porosity of the fired fiber.