n-type semi-conducting behavior and higher photocatalytic activity among various co-doped TiO2 compns. and pure TiO2 investigated. ~0 Citings 3. Preparation and characterization of Fe-doped TiO2 powders for solar light response and photocatalytic applications

This is a review article covering literature reported on consolidation of ceramic components out of aq.-based Al2O3, MgAl2O4 spinel, β-Si4Al2O2N6, β-SiAlON-SiO2 composite, and zirconia toughened alumina (ZTA) slurries following hydrolysis induced aq. gelcasting (henceforth referred to as GCHAS) route. GCHAS is a combination of aq. gelcasting (GC) and hydrolysis assisted solidification (HAS) routes. The advantages of GCHAS over other net-shape forming techniques in the fabrication of certain important ceramic structures such as thin wall radomes have been reviewed in this article. Interestingly, among the various colloidal-based net shape forming techniques available, GCHAS has been found to be a most promising one for consolidating complex-shaped ceramic structures with significantly high green strength and high product yield. Sintered properties of ceramics consolidated by GCHAS are compared and discussed with those of similar ceramics consolidated by aq. slip casting (SC), GC, HAS, and a conventional dry-powder pressing (DP) of freeze dried granules in this article.