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Title: Uniformly porous MgTi2O5 with narrow pore-size distribution: in situ processing, microstructure and thermal expansion behavior
Authors: SUZUKI, Yoshikazu
MORIMOTO, Masafumi
Author's alias: 鈴木, 義和
Keywords: MgTi2O5
Pseudobrookite
Karrooite
Pore-size distribution
In-situ process
High-temperature XRD
Thermal expansion
Issue Date: 1-Dec-2010
Publisher: The Ceramic Society of Japan
Journal title: Journal of the Ceramic Society of Japan
Volume: 118
Issue: 12
Start page: 1212
End page: 1216
Abstract: Porous ceramics based on refractory double oxides are promising for light-weight structural components and high-temperature filter materials. In this study, porous MgTi2O5 ceramics with pseudobrookite-type structure have been prepared by in situ processing (viz. reactive sintering). High-temperature XRD revealed the in situ reaction behavior of the mixed powder, and indicated suitable sintering temperatures to obtain single phase MgTi2O5 (²1000°C). Uniformly porous MgTi2O5 ceramics with very narrow pore-size distribution at the diameter of ³1 μm were obtained by the pyrolytic reactive sintering at 10001200° C, where decomposed CO2 gas from a carbonate source acted as an intrinsic pore forming agent. Thermal expansion behavior of bulk porous MgTi2O5 (porosity: 42%) is also discussed.
Rights: ©2010 The Ceramic Society of Japan.
URI: http://hdl.handle.net/2433/141923
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