Abstract
Spherical nano-sized YSZ (yttria stabilized ZrO 2) powders were successfully synthesized via a reverse microemulsion system. The water droplets in the microemulsion system of yclohexane/water/span85/Triton X-100/hexyl alcohol can act as the nano-reactors which solubilize zirconium oxychloride and ammonia water separately. The minute original reactors are favor to the formation of nano-sized spherical YSZ powders and the dispersibility of the powders can be controlled effectually by adjusting the weight ratio of the LiNO 3 molten salt to the precursor. The phase transformation from cubic to monoclinic starts at and 500 °C and finally monoclinic and cubic phase with increased crytallinity coexist at 800 °C. The effect of LiNO 3 molten salt in the formation of YSZ powders was also discussed.
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