POROSITY OF SHAPES FROM HYDROTHERMALLY TREATED TITANIA

Titania nanopowders obtained by hydrolysis of titanium alkoxides and c onsecutive hydrothermal treatment were compacted and sintered. The inf luence of preparation conditions (alkyl, pH of hydrolysis, temperature of hydrothermal treatment, compacting pressure, sintering temperature ) on the porosity of powders, compacts and sintered bodies was investi gated by nitrogen sorption and mercury intrusion. Optimum conditions a re derived to prepare high-density ceramics at relatively low sinterin g temperature.