Abstract
Incorporation of transition metals in porous glass-ceramics of TiO2-SiO2 system was made by the phase separation and crystallization of the glasses of TiO2-SiO2-Al2O3-P2O5-CaO-MgO system containing various kinds of transition metals. The amount of transition metals incorporated in the skeleton of the porous glass-ceramics was dependent on both chemical composition of mother glass and conditions of heat treatment. In general the amount decreased with the increasing amount of rutile in the skeleton. In the glass of high TiO2/SiO2 ratio, the incorporation of relatively large amounts of transition metals was possible even if the precipitation of a fairly large amount of rutile occurred. The crystallization of rutile and in porous glass-ceramics was essential to fabricate rigid platelet porous glass-ceramics.
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