%0 Journal Article
%T High-pressure synthesis and properties of CeO2-ZrO2 solid solution
%A Dapeng Xu
%A Quanyong Wang
%A Zhe Lu
%A Zhiguo Liu
%A Gongmu Zhang
%A Wenhui Su
%J Chinese Science Bulletin
%@ 1861-9541
%D 2001
%I 
%R 10.1007/BF02900427
%X Using nanoparticles of CeO2 and ZrO2 prepared by the chemical precipitation method as starting materials, the singlephase cubic Ce0.5Zr0.5O2 solid solution (cCe0.5Zr0.5O2) has been synthesized under 3.1 GPa at 1073 K for the first time. The structure of the c-Ce0.5Zr0.5O2 has not been changed before and after annealing at 773 K for 1 h. Only an unknown EPR signal (g =1.990) has been observed in the c-Ce0.5Zr0.5O2 and not varied after annealing at 773 K for 1 h, which exhibited that there exists no Ce3+ in the c-Ce0.5Zr0.5O2 and the Ce4+ has not been reduced into Ce3+ after annealing. The transport mechanism is ionic for the c-Ce0.5Zr0.5O2. The bulk conductivity (¦Ò =1.2 ¡Á10 5 S/cm at 823 K, ¦Ò=2.1 ¡Á 10 3 S/cm at 1123 K) is the same as that of CeO2, but smaller than that of Y2O3-stabilized ZrO2. A marked curvature at T = 823 K has been observed in the Arrhenius plot of the bulk conductivity. The activation energy below 823 K is lower than that above 823 K, and the reason has been discussed.
%K CeO2-ZrO2
%K nanocrystalline
%K high-pressure and -temperature
%K solid-state reaction
%K solid solution
%U http://link.springer.com/article/10.1007/BF02900427