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Microstructures of Mullite Sintered from Seeded Sol—Gels
Author(s) -
Mroz Thomas J.,
Laughner James W.
Publication year - 1989
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.1151-2916.1989.tb06166.x
Subject(s) - mullite , microstructure , equiaxed crystals , seeding , materials science , aluminosilicate , grain size , matrix (chemical analysis) , colloid , chemical engineering , mineralogy , composite material , metallurgy , ceramic , chemistry , agronomy , biochemistry , biology , engineering , catalysis
Mullite has been prepared by firing colloidal aluminosilicate gels seeded with crystalline mullite. The seeded gel samples exhibited a variety of microstructures which were dependent on seed concentration. In samples where the volume fraction of seeds was relatively high, an equiaxed grain microstructure was observed. Insamples with a low seed concentration, seed particles grew to form whiskerlike grains with a high aspect ratio within a fine grain matrix.