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Novel Low‐Temperature Processing Route of Dense Mullite Ceramics by Reaction Sintering of Amorphous SiO 2 ‐Coated γ‐Al 2 O 3 Particle Nanocomposites
Author(s) -
Bartsch Marion,
Saruhan Bilge,
Schmücker Martin,
Schneider Hartmut
Publication year - 1999
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.1151-2916.1999.tb01928.x
Subject(s) - mullite , materials science , nanocomposite , sintering , aluminosilicate , amorphous solid , crystallite , ceramic , composite material , particle (ecology) , aluminium silicate , chemical engineering , mineralogy , metallurgy , crystallography , catalysis , chemistry , biochemistry , oceanography , engineering , geology
Dense mullite ceramics were successfully produced at temperatures below 1300°C from amorphous SiO 2 ‐coated gamma‐Al 2 O 3 particle nanocomposites (AS‐gammaA). This method reduces processing temperatures by similar/congruent300°C or more with respect to amorphous SiO 2 ‐coated alpha‐Al 2 O 3 particle microcomposites (AS‐alphaA) and to other Al 2 O 3 ‐SiO 2 reaction couples. The good densification behavior and the relatively low mullite formation temperature make AS‐gammaA nanocomposites an excellent matrix raw material for polycrystalline aluminosilicate fiber‐reinforced mullite composites.