Effect of Nano-ZnO Particles on the Densification Properties and Conductivity of Nano-ZrO_2(8Y)

With adding of nano-ZnO, nano ZrO2(8Y) powder was used as raw materials for pres-sureless sintering at 1200℃. The results show that a small addition of nano-ZnO accelerates the reaction between Y2O3 and ZrO2 in ZrO2(8Y). The ZrO2(8Y)ceramic without nano-ZnO exhibits predominant tetragonal phase with a small percentage of monoclinic, but the samples doped with nano-ZnO(0.5%-2.0% in mass)show a purely cubic phase. The densification and the conductivity of the ceramic doped with nano-ZnO increase significantly.The densification of 94% and the conductivity of 9.02×10-3cm-1· Ω-1 at 700℃ were observed for the sintered body doped with 0.5wt% nano-ZnO.