Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2010, Vol. 31 ›› Issue (8): 1137-1140.DOI: -

• OriginalPaper • Previous Articles     Next Articles

Effects of alumina as dopant on sintering and grain growth behavior of 9 mol% yttria-stabilized zirconia

Liu, Tao (1); Li, Lin (2); Yu, Jing-Kun (1); Xu, Ji-Lin (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) School of Sciences, Shenyang Institute of Aeronautical Engineering, Shenyang 110034, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-08-15 Published:2013-06-20
  • Contact: Liu, T.
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Abstract: Al2O3-doped 9 mol% yttria-stabilized zirconia (9YSZ) was synthesized by the chemical co-precipitation of hydroxides. The solid solubility of Al2O3 as dopant in 9YSZ was characterized by XRD, with the lattice parameters calculated. Then, the effects of Al2O3 on sintering and grain growth behavior of 9YSZ was investigated. The result showed that the lattice parameter of YSZ decreases from 0.51408 nm to 0.51351 nm when the doped Al2O3 is increased up to 0.48wt%, but the lattice parameter remains unchanged if the Al2O3 is doped further. It means that the limit of solid solubility of Al2O3 in 9YSZ is about 0.48wt% and that the Al2O3 as dopant can accelerate the sintering process so as to hurry up the grain growth and make 9YSZ denser.

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