Abstract
| Original language | English |
|---|---|
| Title of host publication | Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987 |
| Editors | D. Taylor |
| Place of Publication | Stoke-on-Trent |
| Publisher | The Institute of Ceramics |
| Pages | 973-978 |
| Publication status | Published - 1988 |
Publication series
| Name | Science of Ceramics |
|---|---|
| Volume | 14 |
| ISSN (Print) | 0080-7575 |
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Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics. / Schuh, L.H.; Metselaar, R.; With, de, G.
Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987. ed. / D. Taylor. Stoke-on-Trent : The Institute of Ceramics, 1988. p. 973-978 (Science of Ceramics; Vol. 14).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review
TY - GEN
T1 - Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics
AU - Schuh, L.H.
AU - Metselaar, R.
AU - With, de, G.
PY - 1988
Y1 - 1988
N2 - High temperature measurements of conductivity as f(T) of Y3Al5O12 (YAG) doped with 50 ppm Zr in CO/CO2 and H2/H2O gas mixtures show a significant difference in the activation energy (3.54 resp. 1.91 eV) at constant oxygen partial pressure. The sign of the Seebeck coefficient indicates that a H2/H2O atmosphere introduces protons as conducting species into the garnet lattice. Impedance spectroscopy revealed that this is a bulk effect, while the grain boundaries are nearly unaffected by ambient atmosphere. Ionic and electronic conductivity as f(pO2) show that ionic conductivity dominates in the high pO2 regime, while at low pO2 electronic conductivityincreases with pO2-1/5 indicating that either singly or doubly ionised oxygen vacancies or defect clusters appear as prevailing ionic defects.
AB - High temperature measurements of conductivity as f(T) of Y3Al5O12 (YAG) doped with 50 ppm Zr in CO/CO2 and H2/H2O gas mixtures show a significant difference in the activation energy (3.54 resp. 1.91 eV) at constant oxygen partial pressure. The sign of the Seebeck coefficient indicates that a H2/H2O atmosphere introduces protons as conducting species into the garnet lattice. Impedance spectroscopy revealed that this is a bulk effect, while the grain boundaries are nearly unaffected by ambient atmosphere. Ionic and electronic conductivity as f(pO2) show that ionic conductivity dominates in the high pO2 regime, while at low pO2 electronic conductivityincreases with pO2-1/5 indicating that either singly or doubly ionised oxygen vacancies or defect clusters appear as prevailing ionic defects.
M3 - Conference contribution
T3 - Science of Ceramics
SP - 973
EP - 978
BT - Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987
A2 - Taylor, D.
PB - The Institute of Ceramics
CY - Stoke-on-Trent
ER -