Details
| Original language | English |
|---|---|
| Pages (from-to) | 111-118 |
| Number of pages | 8 |
| Journal | SOLID STATE IONICS |
| Volume | 109 |
| Issue number | 1-2 |
| Early online date | 19 May 1998 |
| Publication status | Published - 1 Jun 1998 |
Abstract
We have investigated the electric properties of ionically conducting ZrO2-Y2O3 ceramics and single crystals with molar concentrations ranging from 4 mol% Y2O3 to 12 mol% Y2O3. The frequency dependent conductivities and dielectric constants were measured in the frequency range from 20 Hz to 1 GHz and at temperatures 300 K ≤ T ≤ 1100 K. The spectra are analyzed carefully in order to separate the bulk conductivity from blocking electrode and grain boundary effects. The intrinsic conductivity follows the universal dielectric response expression: σ′(ω) = σdc + Aωs. In contrast, the corresponding formula for the dielectric permittivity, ε′(ω) = ε∞ + Aωs -1 tan(sπ/2)/ε0 cannot explain the step-like frequency dependence of the experimental data. The observed feature is attributed to the hopping of the mobile ions.
Keywords
- Dielectric relaxation, Impedance spectroscopy, Ionic conductivity, Yttrium compounds, Zirconium compounds
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: SOLID STATE IONICS, Vol. 109, No. 1-2, 01.06.1998, p. 111-118.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ionic conductivity and relaxations in ZrO2-Y2O3 solid solutions
AU - Pimenov, A.
AU - Ullrich, J.
AU - Lunkenheimer, P.
AU - Loidl, A.
AU - Rüscher, C. H.
PY - 1998/6/1
Y1 - 1998/6/1
N2 - We have investigated the electric properties of ionically conducting ZrO2-Y2O3 ceramics and single crystals with molar concentrations ranging from 4 mol% Y2O3 to 12 mol% Y2O3. The frequency dependent conductivities and dielectric constants were measured in the frequency range from 20 Hz to 1 GHz and at temperatures 300 K ≤ T ≤ 1100 K. The spectra are analyzed carefully in order to separate the bulk conductivity from blocking electrode and grain boundary effects. The intrinsic conductivity follows the universal dielectric response expression: σ′(ω) = σdc + Aωs. In contrast, the corresponding formula for the dielectric permittivity, ε′(ω) = ε∞ + Aωs -1 tan(sπ/2)/ε0 cannot explain the step-like frequency dependence of the experimental data. The observed feature is attributed to the hopping of the mobile ions.
AB - We have investigated the electric properties of ionically conducting ZrO2-Y2O3 ceramics and single crystals with molar concentrations ranging from 4 mol% Y2O3 to 12 mol% Y2O3. The frequency dependent conductivities and dielectric constants were measured in the frequency range from 20 Hz to 1 GHz and at temperatures 300 K ≤ T ≤ 1100 K. The spectra are analyzed carefully in order to separate the bulk conductivity from blocking electrode and grain boundary effects. The intrinsic conductivity follows the universal dielectric response expression: σ′(ω) = σdc + Aωs. In contrast, the corresponding formula for the dielectric permittivity, ε′(ω) = ε∞ + Aωs -1 tan(sπ/2)/ε0 cannot explain the step-like frequency dependence of the experimental data. The observed feature is attributed to the hopping of the mobile ions.
KW - Dielectric relaxation
KW - Impedance spectroscopy
KW - Ionic conductivity
KW - Yttrium compounds
KW - Zirconium compounds
UR - http://www.scopus.com/inward/record.url?scp=0032098166&partnerID=8YFLogxK
U2 - 10.1016/s0167-2738(98)00082-4
DO - 10.1016/s0167-2738(98)00082-4
M3 - Article
AN - SCOPUS:0032098166
VL - 109
SP - 111
EP - 118
JO - SOLID STATE IONICS
JF - SOLID STATE IONICS
SN - 0167-2738
IS - 1-2
ER -