It was shown that the structure and particle size of zirconia nanoparticles has been controlled through the homogeneous precipitation process by using templates. Hexamine as the template led to ZrO2 nanoparticles with tetragonal structure, whereas coffee extract favored monoclinic structures. Field Emission Scanning electron microscopy (FeSEM), Transmission electron microscopy (TEM) measurement...

The ballistic impact performance of nanocrystalline zirconia-toughened alumina (nZTA) ceramics, comprising 15 wt% nano-yttria-stabilised zirconia in a sub-micron matrix, have been studied through depth penetration tests and compared to the results for monolithic alumina. resistance each material was evaluated by fitting against thickness ceramic targets. These show that, despite micro-Raman ana...

New binary catalytic systems based on sulphated zirconia-alumina were synthesized by controlled hydrolysis of alkoxides using relative molar ratios constituents 1:1, 1:2 and 1:3 in favour zirconia. The obtained differences the final material?s properties may be related to organic precursor memory effect, applied calcinations temperatures used alumina contents. addition zirconia affected structu...