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Formation of Mullite from Filled Siloxanes
Author(s) -
Suttor Daniel,
Kleebe HansJoachim,
Ziegler Gunter
Publication year - 1997
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.1151-2916.1997.tb03156.x
Subject(s) - siloxane , mullite , materials science , shrinkage , sintering , amorphous solid , phase (matter) , filler (materials) , polymer , composite material , aluminium , chemical engineering , ceramic , organic chemistry , chemistry , engineering
Monolithic mullite with low sintering shrinkage was synthesized from polymer/filler blendsMthat is, siloxane/alumina (siloxane/Al 2 O 3 ) (and siloxane/aluminum (siloxane/Al)) mixtures. The synthesis was based on a reaction‐bonding process of amorphous silica, which formed when the siloxane was oxidized, with Al 2 O 3 (or oxidized aluminum filler) at temperatures >1250°C. Thermodynamic calculations were used to calculate the phase composition at equilibrium. Thermoanalytical, infrared‐spectroscopic, and microscopic techniques were applied to reveal the microstructural evolution. The corresponding volume changes were used to evaluate the linear shrinkage, based on the quantitative phase assemblage.