INORGANICCHEMICALSINDUSTRY ›› 2011, Vol. 43 ›› Issue (3): 21-.

Previous Articles     Next Articles

Thermal expansion performance of Y2O3-ZrO2 doped with CeO2

 ZHAO  Wen-Guang, WANG  Ze-Fei, ZHANG  Hui-Feng, AN  Sheng-Li   

  1. School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China
  • Published:2011-04-19

Abstract: Effect of CeO2 doping on coefficient of thermal expansion of Y0.06Zr0.94O1.97 (Y2O3-ZrO2 compound) was studied.CexY0.06Zr0.94-xO1.97(0.08≤x≤0.16) compound was prepared via co-precipitation method.After pressing molding,the roasting temperatures were determined according to  heat shrinkage curve of the sample.Samples were respectively sintered at 1 250,1 350,1 450 ℃ for 3 h in high-temperature electric resistance furnace.Their micro-structures were analyzed by XRD and SEM,and the coefficients of thermal expansion were measured by thermal expansion instrument.Results indicated that the coefficient of thermal expansion of CexY0.06Zr0.94-xO1.97(0.08≤x≤0.16) was higher than that ofY0.06Zr0.94O1.97,because the constant of crystal lattice was increased and material′s chemical bonds were effectively weakened by doping CeO2 in Y2O3-ZrO2.

Key words: CexY0.06Zr0.94-xO1.97, co-precipitation, micro-structure, thermal expansion

CLC Number: