Abstract
A homogeneous and stable amorphous-type cordierite (2MgO·2Al 2O 3·5SiO 2) powder was prepared by a solution-polymerization route employing a Pechini resin or a poly-(vinyl alcohol) (PVA) solution as the polymeric carrier. After calcination at 800°C for 1 h under atmospheric conditions, the bulky precursor changed into a very soft and porous powder. A 30 nm size, amorphous-type cordierite powder was prepared by attrition milling the calcined powder, which was made using a PVA precursor solution. The nano-size powder, which had a high specific surface area of 181 m 2/g, was obtained after milling for <1 h. The sintered cordierite grains did not show the presence of any amorphous SiO 2 phase and had a dense microstructure with a relative density of 99% and a thermal expansion coefficient of 2.1 × 10 -6/°C.
Original language | English (US) |
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Pages (from-to) | 2605-2612 |
Number of pages | 8 |
Journal | Journal of the American Ceramic Society |
Volume | 81 |
Issue number | 10 |
State | Published - Oct 1 1998 |
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry