Preparation of Monolithic Porous Titania-Silica Ceramics |
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| Authors: | Hideo Hosono Yasuhiro Sakai Marcelo Fasano Yoshihiro Abe |
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| Affiliation: | Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan |
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| Abstract: | Monolithic porous ceramics composed of TiO2 (67 mol%) and SiO2 (33 mol%) were prepared via casting a melt in the Na2O-CaO-TiO2-P2O5-SiO2 system and subsequent acid leaching of the resultant ceramics which are constituted of NaCaPO4, TiO2, and amorphous SiO2. The median pore diameter and specific surface area of the resulting porous ceramics are approximately 1 μm and 40 m2, respectively. Amorphous silica surrounds the submicrometer-sized particles of TiO2 acting as a binder and retaining monolithic forms. No significant shrinkage in the pore size occurred upon heating up to 1000°C. |
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| Keywords: | titania silica porous materials monoliths synthesis |
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