高等学校化学学报
高等學校化學學報
고등학교화학학보
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES
2015年
1期
61-66
,共6页
林晓敏%朱丽丽%韩健%刘晓梅
林曉敏%硃麗麗%韓健%劉曉梅
림효민%주려려%한건%류효매
固体电解质%铒和镨双掺杂氧化铈%拉曼光谱%X射线光电子能谱%电导率
固體電解質%鉺和鐠雙摻雜氧化鈰%拉曼光譜%X射線光電子能譜%電導率
고체전해질%이화보쌍참잡양화시%랍만광보%X사선광전자능보%전도솔
Solid electrolyte%Erbium and praseodymium doped ceria%Raman spectrum%X-ray photoelectron spectroscopy%Conductivity
采用柠檬酸溶胶-凝胶法制备了固体电解质Ce0.9Er0.1-xPrxO1.95+δ(x=0.02~0.08),利用X射线粉末衍射( XRD)、原子力显微镜( AFM)、拉曼光谱( Raman)、X射线光电子能谱( XPS)和交流阻抗谱研究了样品的微观结构和电性能. XRD结果表明,800℃煅烧的所有样品均形成了单相立方萤石结构；Raman光谱结果表明, Ce0.9 Er0.05 Pr0.05 O1.95+δ具有氧缺位的立方萤石结构；XPS分析表明, Ce0.9 Er0.05 Pr0.05 O1.95+δ存在氧缺位, Pr3+离子和Pr4+离子共存；AFM观测结果表明,1300℃下烧结的样品比1400℃下烧结的样品致密；交流阻抗谱结果表明, Pr掺杂量 x=0.05时, Ce0.9 Er0.05 Pr0.05 O1.95+δ的电导率最高(σ600℃=1.34×10-2 S/cm, Ea=0.90 eV),比未掺杂Pr的Ce0.9Er0.1O1.95(σ600℃=8.81×10-3 S/cm, Ea=0.92 eV)提高了52%,说明在Ce0.9Er0.1O1.95中适量掺杂Pr可提高材料的电导率,降低活化能.
採用檸檬痠溶膠-凝膠法製備瞭固體電解質Ce0.9Er0.1-xPrxO1.95+δ(x=0.02~0.08),利用X射線粉末衍射( XRD)、原子力顯微鏡( AFM)、拉曼光譜( Raman)、X射線光電子能譜( XPS)和交流阻抗譜研究瞭樣品的微觀結構和電性能. XRD結果錶明,800℃煅燒的所有樣品均形成瞭單相立方螢石結構；Raman光譜結果錶明, Ce0.9 Er0.05 Pr0.05 O1.95+δ具有氧缺位的立方螢石結構；XPS分析錶明, Ce0.9 Er0.05 Pr0.05 O1.95+δ存在氧缺位, Pr3+離子和Pr4+離子共存；AFM觀測結果錶明,1300℃下燒結的樣品比1400℃下燒結的樣品緻密；交流阻抗譜結果錶明, Pr摻雜量 x=0.05時, Ce0.9 Er0.05 Pr0.05 O1.95+δ的電導率最高(σ600℃=1.34×10-2 S/cm, Ea=0.90 eV),比未摻雜Pr的Ce0.9Er0.1O1.95(σ600℃=8.81×10-3 S/cm, Ea=0.92 eV)提高瞭52%,說明在Ce0.9Er0.1O1.95中適量摻雜Pr可提高材料的電導率,降低活化能.
채용저몽산용효-응효법제비료고체전해질Ce0.9Er0.1-xPrxO1.95+δ(x=0.02~0.08),이용X사선분말연사( XRD)、원자력현미경( AFM)、랍만광보( Raman)、X사선광전자능보( XPS)화교류조항보연구료양품적미관결구화전성능. XRD결과표명,800℃단소적소유양품균형성료단상립방형석결구；Raman광보결과표명, Ce0.9 Er0.05 Pr0.05 O1.95+δ구유양결위적립방형석결구；XPS분석표명, Ce0.9 Er0.05 Pr0.05 O1.95+δ존재양결위, Pr3+리자화Pr4+리자공존；AFM관측결과표명,1300℃하소결적양품비1400℃하소결적양품치밀；교류조항보결과표명, Pr참잡량 x=0.05시, Ce0.9 Er0.05 Pr0.05 O1.95+δ적전도솔최고(σ600℃=1.34×10-2 S/cm, Ea=0.90 eV),비미참잡Pr적Ce0.9Er0.1O1.95(σ600℃=8.81×10-3 S/cm, Ea=0.92 eV)제고료52%,설명재Ce0.9Er0.1O1.95중괄량참잡Pr가제고재료적전도솔,강저활화능.
The microstructure and electrical conductivity of Ce0.9Er0.1-xPrxO1.95+δ(x=0—0. 08) solid electro- lytes synthesized by citric sol-gel method were characterized by means of X-ray diffraction ( XRD ) , atomic force microscopy( AFM) , Raman, X-ray photoelectron spectroscopy and impedance spectroscopy. XRD meas- urements show that all the samples calcined at 800 ℃ crystallize in single cubic fluorite structure. The Raman spectra indicate that the Ce0. 9 Er0. 05 Pr0. 05 O1. 95+δis cubic fluorite structure with oxygen vacancies. X-ray photoe- lectron spectroscopy analysis suggest that oxygen vacancies and the mixed valence Pr3+ and Pr4+ ions exist in Ce0. 9 Er0. 05 Pr0. 05 O1. 95+δ. AFM results show that sample Ce0. 9 Er0. 05 Pr0. 05 O1. 95+δsintered at 1300℃ is denser than that sintered at 1400 ℃. The maximum conductivity of Ce0. 9 Er0. 05 Pr0. 05 O1. 95+δ is found at x=0. 05 (σ600 ℃=1. 34 ×10-2 S/cm, Ea=0. 90 eV) . The conductivity of Ce0. 9 Er0. 05 Pr0. 05 O1. 95+δincreases by 52% in comparison with that of Ce0.9Er0.1O1.95 without Pr(σ600 ℃ =8. 81×10-3 S/cm, Ea=0. 92 eV), which suggests that co- doping with appropriate ratio of Pr can further improve the electrical performance of Ce0. 9 Er0. 1 O1. 95 .
