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Decomposition of Mullite
Author(s) -
DAVIS ROBERT F.,
AKSAY ILHAN A.,
PASK JOSEPH A.
Publication year - 1972
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.1151-2916.1972.tb11218.x
Subject(s) - mullite , decomposition , materials science , diffusion , aluminium silicate , mineralogy , chemical engineering , composite material , chemistry , thermodynamics , ceramic , physics , organic chemistry , engineering
Free surfaces of 2:1 mullite (2Al 2 O 3 ·SiO 2 ) specimens decomposed with the evolution of SiO and O 2 when they were heated at high temperatures under low partial pressures of O 2 ; this reaction was analyzed thermodynamically. In addition, bubbles were observed at internal interfaces between mullite and fused‐SiO 2 diffusion couples. These bubbles, when formed at 1 atm ambient pressure between 1650° and 1800°C, resulted from reaction of Si particles and residual SiO 2 ‐rich glass in the fused cast mullite.