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SiAlON‐Based Ceramics from Filled Preceramic Polymers
Author(s) -
Bernardo E.,
Colombo P.,
Hampshire S.
Publication year - 2006
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.1551-2916.2006.01287.x
Subject(s) - sialon , mullite , materials science , sillimanite , corundum , ceramic , polymer , yield (engineering) , silicate , composite material , mineralogy , chemical engineering , opalescence , quartz , chemistry , biotite , engineering , physics , quantum mechanics
Commercial polysiloxanes filled with alumina nanoparticles and AlN and Si 3 N 4 micropowders have been used for the preparation of β‐SiAlON in nitrogen, at 1450°–1550°C. SiAlON was preceded by intermediate alumino‐silicate phases like mullite and sillimanite. Although reduction and nitridation to β‐SiAlON finally occurred, the SiAlON yield at high temperatures was lowered by corundum contaminations. The yield was also possibly affected by phase separation in the SiOC glass residue derived from silicones. A composition refinement reduced contamination and provided a promising route for SiAlON from filled preceramic polymers.