Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics

L.H. Schuh, R. Metselaar, G. With, de

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

78 Downloads (Pure)

Abstract

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.
Original languageEnglish
Title of host publicationScience of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987
EditorsD. Taylor
Place of PublicationStoke-on-Trent
PublisherThe Institute of Ceramics
Pages973-978
Publication statusPublished - 1988

Publication series

NameScience of Ceramics
Volume14
ISSN (Print)0080-7575

Fingerprint

yttrium-aluminum garnet
ion currents
ceramics
atmospheres
conductivity
electrical resistivity
defects
oxygen
Seebeck effect
electronics
garnets
partial pressure
gas mixtures
temperature measurement
grain boundaries
impedance
activation energy
conduction
protons
spectroscopy

Cite this

Schuh, L. H., Metselaar, R., & With, de, G. (1988). Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics. In D. Taylor (Ed.), Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987 (pp. 973-978). (Science of Ceramics; Vol. 14). Stoke-on-Trent: The Institute of Ceramics.
Schuh, L.H. ; Metselaar, R. ; With, de, G. / Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics. Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987. editor / D. Taylor. Stoke-on-Trent : The Institute of Ceramics, 1988. pp. 973-978 (Science of Ceramics).
@inproceedings{08c43513441f4082894c3bcf182b9fa7,
title = "Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics",
abstract = "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.",
author = "L.H. Schuh and R. Metselaar and {With, de}, G.",
year = "1988",
language = "English",
series = "Science of Ceramics",
publisher = "The Institute of Ceramics",
pages = "973--978",
editor = "D. Taylor",
booktitle = "Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987",

}

Schuh, LH, Metselaar, R & With, de, G 1988, Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics. in D Taylor (ed.), Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987. Science of Ceramics, vol. 14, The Institute of Ceramics, Stoke-on-Trent, pp. 973-978.

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 proceedingConference contributionAcademicpeer-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 -

Schuh LH, Metselaar R, With, de G. Electrical conductivity study of defects in zirconium doped yttrium aluminium garnet ceramics. In Taylor D, editor, Science of ceramics : proceedings of the ... international conference, 14th, Canterbury, England, 7-9 September, 1987. Stoke-on-Trent: The Institute of Ceramics. 1988. p. 973-978. (Science of Ceramics).