Stabilized zirconia shows rather high microwave absorbency at room temperature, and the
absorbency become higher with increasing temperature. In this study, stabilized zirconia powder,
partially stabilized zirconia powder and zirconia fiber were subjected for microwave absorption
measurements at elevated temperature. Microwave absorption measurements were done by using a
system consists of a microwave vector network analyzer, a circular wave-guide fixture and a vacuum
furnace. Microwave absorbency was evaluated by the reflection power change from the sample in the
circular wave-guide fixture under vacuum heating. Microwave absorbency of stabilized zirconia
powder, partially stabilized zirconia powder and zirconia fiber gradually increased with the increase
of temperature. We supposed that the increase of microwave absorbency is related to the ionic
(oxygen) conduction behavior of stabilized zirconia. Stoichiometric composition ZrO2 powder was
also subjected for a measurement to consider the relation between microwave absorbency and ion
conduction of zirconia. As the result, stoichiometric composition ZrO2 powder was not absorbed
microwave power even when the powder was heated up to 900oC because it isn’t an oxygen ion
conductor.
Mixing and rheological behavior of HAp-ZrO2 powder injection moulding feedstock
