Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) Materials
<p>Abstract</p> <p>The ionic transport properties of nanocrystalline 20 mol% Eu, Gd, Dy, and Ho doped cerias, with average grain size of around 14 nm were studied by correlating electrical, dielectric properties, and various dynamic parameters. Gd-doped nanocrystalline ceria shows...
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2010-01-01
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| Series: | Nanoscale Research Letters |
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| Online Access: | http://dx.doi.org/10.1007/s11671-010-9527-z |
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doaj-e1c68fd2b89548ac96a4ea3a96f04cdd2020-11-24T21:58:58ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2010-01-0153637643Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) MaterialsBaral Ashok KumarSankaranarayanan V<p>Abstract</p> <p>The ionic transport properties of nanocrystalline 20 mol% Eu, Gd, Dy, and Ho doped cerias, with average grain size of around 14 nm were studied by correlating electrical, dielectric properties, and various dynamic parameters. Gd-doped nanocrystalline ceria shows higher value of conductivity (i.e., 1.8 × 10<sup>−4</sup> S cm<sup>−1</sup> at 550°C) and a lower value of association energy of oxygen vacancies with trivalent dopants Gd<sup>3+</sup> (i.e., 0.1 eV), compared to others. Mainly the lattice parameters and dielectric constants (ε<sub>∞</sub>) are found to control the association energy of oxygen vacancies in these nanomaterials, which in turn resulted in the presence of grain and grain boundary conductivity in Gd- and Eu-doped cerias and only significant grain interior conductivity in Dy- and Ho-doped cerias.</p> http://dx.doi.org/10.1007/s11671-010-9527-zNanostructuresElectrical transportDielectric relaxationsAssociation energy |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Baral Ashok Kumar Sankaranarayanan V |
| spellingShingle |
Baral Ashok Kumar Sankaranarayanan V Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) Materials Nanoscale Research Letters Nanostructures Electrical transport Dielectric relaxations Association energy |
| author_facet |
Baral Ashok Kumar Sankaranarayanan V |
| author_sort |
Baral Ashok Kumar |
| title |
Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) Materials |
| title_short |
Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) Materials |
| title_full |
Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) Materials |
| title_fullStr |
Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) Materials |
| title_full_unstemmed |
Ionic Transport Properties in Nanocrystalline Ce<sub>0.8</sub>A<sub>0.2</sub>O<sub>2-δ</sub> (with A = Eu, Gd, Dy, and Ho) Materials |
| title_sort |
ionic transport properties in nanocrystalline ce<sub>0.8</sub>a<sub>0.2</sub>o<sub>2-δ</sub> (with a = eu, gd, dy, and ho) materials |
| publisher |
SpringerOpen |
| series |
Nanoscale Research Letters |
| issn |
1931-7573 1556-276X |
| publishDate |
2010-01-01 |
| description |
<p>Abstract</p> <p>The ionic transport properties of nanocrystalline 20 mol% Eu, Gd, Dy, and Ho doped cerias, with average grain size of around 14 nm were studied by correlating electrical, dielectric properties, and various dynamic parameters. Gd-doped nanocrystalline ceria shows higher value of conductivity (i.e., 1.8 × 10<sup>−4</sup> S cm<sup>−1</sup> at 550°C) and a lower value of association energy of oxygen vacancies with trivalent dopants Gd<sup>3+</sup> (i.e., 0.1 eV), compared to others. Mainly the lattice parameters and dielectric constants (ε<sub>∞</sub>) are found to control the association energy of oxygen vacancies in these nanomaterials, which in turn resulted in the presence of grain and grain boundary conductivity in Gd- and Eu-doped cerias and only significant grain interior conductivity in Dy- and Ho-doped cerias.</p> |
| topic |
Nanostructures Electrical transport Dielectric relaxations Association energy |
| url |
http://dx.doi.org/10.1007/s11671-010-9527-z |
| work_keys_str_mv |
AT baralashokkumar ionictransportpropertiesinnanocrystallinecesub08subasub02subosub2948subwithaeugddyandhomaterials AT sankaranarayananv ionictransportpropertiesinnanocrystallinecesub08subasub02subosub2948subwithaeugddyandhomaterials |
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