Synthesis of (Bi, Mn, Fe)-doped ceria electrolytes by low-temperature processes
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The effects of low temperature processes and the dopants of bismuth, manganese and iron co-doping in Ce1-x,Mx)O2 materialshave been investigated. The CeO2-based powders were synthesized by EDTA-citric acid method and their sintering behaviorwas analyzed by dilatometry (DIL) and density measurement. X-ray diffraction (XRD) and various electron microscopies wereused to identify crystalline phases and microstructure. The results show that solubility limit of Mn and Fe in ceria is less than1 at% while that of Bi is at 8-9 at%. Two electrolytes, Ce0.9(Bi0.09Mn0.005Fe0.005)O2 and Ce0.9(Bi0.1)O2, are selected and sinteredto full density at 1050-1100 oC for 1 hr improved by doping trace amount of Mn and Fe The detail microstructurecharacterization of the doped samples are discussed.
Abstract
The effects of low temperature processes and the dopants of bismuth, manganese and iron co-doping in Ce1-x,Mx)O2 materialshave been investigated. The CeO2-based powders were synthesized by EDTA-citric acid method and their sintering behaviorwas analyzed by dilatometry (DIL) and density measurement. X-ray diffraction (XRD) and various electron microscopies wereused to identify crystalline phases and microstructure. The results show that solubility limit of Mn and Fe in ceria is less than1 at% while that of Bi is at 8-9 at%. Two electrolytes, Ce0.9(Bi0.09Mn0.005Fe0.005)O2 and Ce0.9(Bi0.1)O2, are selected and sinteredto full density at 1050-1100 oC for 1 hr improved by doping trace amount of Mn and Fe The detail microstructurecharacterization of the doped samples are discussed.
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