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Preparation of Monolithic Porous Titania‐Silica Ceramics
Author(s) -
Hosono Hideo,
Sakai Yasuhiro,
Fasano Marcelo,
Abe Yoshihiro
Publication year - 1990
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.1151-2916.1990.tb07630.x
Subject(s) - materials science , porosity , amorphous solid , ceramic , shrinkage , chemical engineering , leaching (pedology) , composite material , mineralogy , crystallography , chemistry , environmental science , soil science , engineering , soil water
Monolithic porous ceramics composed of TiO 2 (67 mol%) and SiO 2 (33 mol%) were prepared via casting a melt in the Na 2 O‐CaO‐TiO 2 ‐P 2 O 5 ‐SiO 2 system and subsequent acid leaching of the resultant ceramics which are constituted of NaCaPO 4 , TiO 2 , and amorphous SiO 2 . The median pore diameter and specific surface area of the resulting porous ceramics are approximately 1 μm and 40 m 2 , respectively. Amorphous silica surrounds the submicrometer‐sized particles of TiO 2 acting as a binder and retaining monolithic forms. No significant shrinkage in the pore size occurred upon heating up to 1000°C.