Preparation of Core-shell Structural Zirconia Coated Alumina Nanocomposite Powders

A zirconia coated alumina nanocomposite was synthesized by the one-step alkoxide hydrolyzing method. A layer of very uniform nanocrystalline zirconia shell with its thickness about 4-5nm was successfully coated onto the commercial nano-alumina particle. The thickness of the zirconia layer can be controllable by adjusting the concentrations of zirconium source and acetic acid. The results show that such novel core-shell nanocomposite powders of alumina-zirconia can be helpful to inhibit the much faster growth of alumina particles and show the uniform surface morphogenesis. XRD, TEM, FESEM and EDS were used for the structural characterizations.