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...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2010-01-01
|
| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1007/s11671-010-9527-z |
| _version_ | 1797762901865398272 |
|---|---|
| author | Baral Ashok Kumar Sankaranarayanan V |
| author_facet | Baral Ashok Kumar Sankaranarayanan V |
| author_sort | Baral Ashok Kumar |
| collection | DOAJ |
| 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> |
| first_indexed | 2024-03-12T19:35:00Z |
| format | Article |
| id | doaj.art-e1c68fd2b89548ac96a4ea3a96f04cdd |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T19:35:00Z |
| publishDate | 2010-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-e1c68fd2b89548ac96a4ea3a96f04cdd2023-08-02T04:17:56ZengSpringerOpenNanoscale 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 |
| 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 |
| 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_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_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_sort | ionic transport properties in nanocrystalline ce sub 0 8 sub a sub 0 2 sub o sub 2 948 sub with a eu gd dy and ho materials |
| 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 |