节点文献
Ce0.8Pr0.2-xSmxO2-δ(x=0.02,0.05,0.10)固溶体的合成及性质
Preparation and Properties for Solid Solution Ce0.8Pr0.2-xSmxO2-δ(x=0.02,0.05,0.10)
【摘要】 采用溶胶-凝胶法制备固体电解质Ce0.8Pr0.2-xSmxO2-δ(x=0.02,0.05,0.10).XRD结果表明:800℃煅烧后的全部样品皆为单一的立方萤石型结构,平均晶粒尺寸为19~28 nm;Raman光谱结果表明:立方萤石结构的Ce0.8Pr0.2-xSmxO2-δ固溶体中存在氧空位,在Ce0.8Pr0.2-xSmxO2-δ中掺入钐可提高氧空位浓度;阻抗谱测试表明:稀土双掺杂Ce0.8Pr0.15Sm0.05O2-δ的电导率高于单一稀土掺杂Ce0.83Sm0.17O2-δ的电导率,且Ce0.8Pr0.15Sm0.05O2-δ的电导率最大,σ600℃为1.2×10-2S/cm,这归因于样品Ce0.8Pr0.15Sm0.05O2-δ中较高的氧空位浓度和小极化子的跃迁.
【Abstract】 Ce0.8Pr0.2-xSmxO2-δ(x=0.02,0.05,0.10) solid electrolytes were produced by the sol-gel mechanics.XRD consequence proves that entire specimens sintered at 800℃ are formed in an exclusive cubic fluorite structure.The representative grain sizes are 19~28 nm.The Raman spectra shows that there are oxygen vacancies in the solid solution Ce0.8Pr0.2-xSmxO2-δwith cubic fluorite structure.The oxygen vacancy concentration is increased by adding Sm in Ce0.8Pr0.2-xSmxO2-δ.Impedance spectra proves that the conductivity of rare earth codoped ceria Ce0.8Pr0.15Sm0.05O2-δis higher than that of unitary rare earth doped ceria Ce0.83Sm0.17O2-δ.Ce0.8Pr0.15Sm0.05O2-δhave maximum conductivity,σ600℃=1.2×10-2S/cm,which is assigned to the higher oxygen vacancy concentration and the hopping electron transition of micro polarons in the specimen Ce0.8Pr0.15Sm0.05O2-δ.
【Key words】 solid solution; oxygen vacancy; Raman spectra; impedance spectra;
- 【文献出处】 北华大学学报(自然科学版) ,Journal of Beihua University(Natural Science) , 编辑部邮箱 ,2021年04期
- 【分类号】O646;TB34
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