Novel process of preparation of Yttria stabilized ZrO2 small sizes beads using sol-gel method combined with spray granulation technology

In this work, based on the sol-gel method combined with spray granulation technology, a novel process method to prepare Yttria stabilized Zr0 2 beads with 5-50 lum diameter, 123 nm grains size, few pores, solid internal structure and well spherical type is proposed. These advantages can greatly improve the beads density, and decline the sintering temperature. The optimum preparation parameters, including sol and spray parameters, baking and sintering conditions, are obtained through the investigation of experimental conditions. The SEM test results of the surface and cross section morphologies show that the beads have solid structure and there is good consistency between the surface and interior of the beads. The average grain size of test results is about 123 nm. The XRD test results demonstrate that no monoclinic phase exists in the beads. The sintering temperature of the new process is only 1200 degrees C. [GRAPHICS] .

Automated summary

A novel process method to prepare Yttria stabilized Zr0 2 beads with desirable properties has been proposed in this study. The optimized preparation parameters greatly improve the density and reduce the sintering temperature of the beads.