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Uniformly Porous Al2O3/LaPO4 and Al2O3/CePO4 Composites with Narrow Pore-Size Distribution

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Porous Al2O3/20 vol% LaPO4 and Al2O3/20 vol% CePO4 composites with very narrow pore-size distribution at around 200 nm have been successfully synthesized by reactive sintering at 1100°C for 2 h from RE2(CO3)3·xH2O (RE = La or Ce), Al(H2PO4)3 and Al2O3 with LiF additive. Similar to the previously reported UPC-3Ds (uniformly porous composites with a three-dimensional network structure, e.g. CaZrO3/MgO system), decomposed gases in the starting materials formed a homogeneous open porous structure with a porosity of ∼40%. X-ray diffraction, 31P magic-angle spinning nuclear magnetic resonance, scanning electron microscopy, and mercury porosimetry revealed the structure of the porous composites.
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Document Type: Research Article

Affiliations: 1: Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan 2: Rockwell Scientific, Thousand Oaks, California 91360

Publication date: November 1, 2005

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