Abstract
In the last decade, consolidation of nano-powders has been extensively investigated for synthesizing new functional materials [1]. Anatase is one of the promising oxides as it is an environmentally useful material having various applications such as the cleaning of air and water and as an anti-bacterial coating [2]. In general, bulk nano-structured anatase has been synthesized by pressurizing nano-powder compacts at over 1 GPa pressure at low temperatures i.e. below 500 ◦C (high pressure and low temperature [HPLT] method) in order to avoid rapid grain growth in the final stage of sintering [3, 4]. However, successful consolidation of fully densified single phase anatase has not been reported because pressure-assisted densification causes the enhancement of the transformation of metastable anatase to rutile.
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