Premium
Novel Mullite Synthesis Based on Alumina Nanoparticles and a Preceramic Polymer
Author(s) -
Bernardo Enrico,
Colombo Paolo,
Pippel Eckhard,
Woltersdorf Jörg
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.1551-2916.2006.00963.x
Subject(s) - mullite , materials science , homogeneity (statistics) , nanoparticle , polymer , microstructure , composite material , silicone resin , chemical engineering , silicone , volume fraction , mineralogy , ceramic , nanotechnology , chemistry , statistics , mathematics , engineering , coating
Heating in air of a selected mixture of a silicone resin and alumina nanoparticles in the temperature range 1200°–1500°C yielded dense, crack‐free mullite samples. Al 2 O 3 , due to its nanometric size, proved to be very reactive toward silica, deriving from the ceramization of the preceramic polymer, leading to the formation of a large volume fraction of mullite crystals even at low firing temperatures (1250°C). Because of the homogeneity of the distribution of alumina nanoparticles in the starting system, the ceramized samples exhibited a very fine microstructure consisting of crystals with an average dimension in the range of 50–300 nm.