Abstract

Tetragonal zirconia has excellent mechanical properties and biocompatibility, and is widely used in medicine, aviation, ceramics, and other fields. In this study, nano-zirconia (6MgO–2Y₂O₃–ZrO₂) was prepared by co-precipitation method assisted with pressure-less sintering which was used to obtain tetragonal phase zirconia. The zirconia powders were analyzed by XRD, Raman spectroscopy, FT-IR, SEM, and Gaussian mathematical fitting. The outcomes demonstrate that elevated temperature favors the promotion of phase transitions which enhances structural properties and the crystallinity of zirconia, and enables the stable existence of t-ZrO₂ at room temperature. The size of the powder gradually decreases, and the particle size distribution becomes narrower with the temperature increases. With the increasing specific surface area, the morphology of nano-oxidation gradually tends to be spherical. In the sintering temperature (350 °C–950 °C), the spherical nano-powders obtained at 950 °C shows the lowest voidage and the best density. In actual production, it can provide a reference for the preparation of high-quality nano-zirconia and broaden the application field of zirconia.