Preparation of porous TiO2 by a novel freeze casting
作者： Linlin Ren , Yu-Ping Zeng , Dongliang Jiang
DOI: 10.1016/J.CERAMINT.2008.04.009
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摘要: Abstract Highly porous and open interconnected pore structural TiO 2 were prepared by a novel freeze casting method. In the experiment, well-dispersed aqueous slurries first frozen, then dried at reduced vacuum. Since sublimation of ice crystals developed in freezing process, green bodies with highly obtained. The phase composition microstructure sintered samples characterized XRD, SEM, porosity size distribution was measured mercury porosimetry. results demonstrated that PVA concentration remarkably affect ceramics. morphology ceramics 3 wt.% polyvinyl alcohol (PVA) addition dendritic, however, 6 wt.% changed into columnar. reason for variation ascribed to effect gelation on growth behavior crystals.
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