The possibility was explored of making dense and strong partly stabilized zirconia (PSZ)-based ceramic materials from coprecipitated zirconium and yttrium hydroxide powders of both factory and laboratory preparation. The effect of dry and wet grinding, powder burning, cold isostatic pressure (CIP) at≤0.8 GPa, and sintering at ≤1600°C on the physicochemical properties of the material was investigated. It was found that the properties (a density of 5.7–5.8 g/cm3, a bending strength of 600 to 800 MPa, and a crack resistance of 7–9 MPa·m1/2) of the resulting ceramic material would not be reproduced unless the tendency of the PSZ powder to agglomerate spontaneously in storage is overcome or avoided. It is shown that in contrast to other similar materials the ceramic material from a deagglomerated powder has a higher optimal CIP pressure (0.6 GPa), which implies that the material has an improved thermal endurance and a better mechanical stability.
Refractories and Industrial Ceramics – Springer Journals
Published: Nov 26, 2007
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