Abstract
The grain morphology and sinterability of zirconia formed from concentrated ZrOCl2 solutions was studied. Sealed double structured vessels, in which a reactive alumina powder packed in the outer vessel, were used. The zirconia powder composed of spherical aggregates of 1.0 micro-meter in diameter was obtained by hydrolysis of the concentrated solution. The diameter of the aggregates decreased with adding some other chloride hydrates. The relative density of 94% was attained by firing at 1350C for 2 hours using aggregates of 0.5 micro-meter in diameter with 3 mol% Y2O3 added.
