Impedance spectroscopy of grain boundaries in nanophase ZnO

J. Lee, J. H. Hwang, Thomas O Mason, T. O. Mason, A. E. Miller, R. W. Siegel

Research output: Contribution to journalArticle

122 Citations (Scopus)

Abstract

Sintered compacts of nanophase ZnO (approximately 60 nm average grain size, presintered at 600 °C) were made from powders (approximately 13 nm) prepared by the gas-condensation technique. Impedance spectra were taken as a function of temperature over the range 450-600 °C and as a function of oxygen partial-pressure over the range 10-3-1 atm (550 and 600 °C only). The activation energy was determined to be 55 kJ/mole (0.57 eV) and was independent of oxygen partial pressure. The oxygen partial pressure exponent was -1/6. Impedance spectra exhibited nonlinear I-V behavior, with a threshold of approximately 6 V. These results indicate that grain boundaries are governing the electrical properties of the compact. Ramifications for oxygen sensing and for grain boundary defect characterization are discussed.

Original languageEnglish
Pages (from-to)2295-2300
Number of pages6
JournalJournal of Materials Research
Volume10
Issue number9
Publication statusPublished - Sep 1995

Fingerprint

Grain boundaries
grain boundaries
Spectroscopy
impedance
Partial pressure
Oxygen
partial pressure
oxygen
spectroscopy
Powders
Condensation
Electric properties
Activation energy
condensation
grain size
Gases
electrical properties
exponents
activation energy
Defects

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Lee, J., Hwang, J. H., Mason, T. O., Mason, T. O., Miller, A. E., & Siegel, R. W. (1995). Impedance spectroscopy of grain boundaries in nanophase ZnO. Journal of Materials Research, 10(9), 2295-2300.

Impedance spectroscopy of grain boundaries in nanophase ZnO. / Lee, J.; Hwang, J. H.; Mason, Thomas O; Mason, T. O.; Miller, A. E.; Siegel, R. W.

In: Journal of Materials Research, Vol. 10, No. 9, 09.1995, p. 2295-2300.

Research output: Contribution to journalArticle

Lee, J, Hwang, JH, Mason, TO, Mason, TO, Miller, AE & Siegel, RW 1995, 'Impedance spectroscopy of grain boundaries in nanophase ZnO', Journal of Materials Research, vol. 10, no. 9, pp. 2295-2300.
Lee J, Hwang JH, Mason TO, Mason TO, Miller AE, Siegel RW. Impedance spectroscopy of grain boundaries in nanophase ZnO. Journal of Materials Research. 1995 Sep;10(9):2295-2300.
Lee, J. ; Hwang, J. H. ; Mason, Thomas O ; Mason, T. O. ; Miller, A. E. ; Siegel, R. W. / Impedance spectroscopy of grain boundaries in nanophase ZnO. In: Journal of Materials Research. 1995 ; Vol. 10, No. 9. pp. 2295-2300.
@article{135ad4121c43439b88838d9d3eb43a2f,
title = "Impedance spectroscopy of grain boundaries in nanophase ZnO",
abstract = "Sintered compacts of nanophase ZnO (approximately 60 nm average grain size, presintered at 600 °C) were made from powders (approximately 13 nm) prepared by the gas-condensation technique. Impedance spectra were taken as a function of temperature over the range 450-600 °C and as a function of oxygen partial-pressure over the range 10-3-1 atm (550 and 600 °C only). The activation energy was determined to be 55 kJ/mole (0.57 eV) and was independent of oxygen partial pressure. The oxygen partial pressure exponent was -1/6. Impedance spectra exhibited nonlinear I-V behavior, with a threshold of approximately 6 V. These results indicate that grain boundaries are governing the electrical properties of the compact. Ramifications for oxygen sensing and for grain boundary defect characterization are discussed.",
author = "J. Lee and Hwang, {J. H.} and Mason, {Thomas O} and Mason, {T. O.} and Miller, {A. E.} and Siegel, {R. W.}",
year = "1995",
month = "9",
language = "English",
volume = "10",
pages = "2295--2300",
journal = "Journal of Materials Research",
issn = "0884-2914",
publisher = "Materials Research Society",
number = "9",

}

TY - JOUR

T1 - Impedance spectroscopy of grain boundaries in nanophase ZnO

AU - Lee, J.

AU - Hwang, J. H.

AU - Mason, Thomas O

AU - Mason, T. O.

AU - Miller, A. E.

AU - Siegel, R. W.

PY - 1995/9

Y1 - 1995/9

N2 - Sintered compacts of nanophase ZnO (approximately 60 nm average grain size, presintered at 600 °C) were made from powders (approximately 13 nm) prepared by the gas-condensation technique. Impedance spectra were taken as a function of temperature over the range 450-600 °C and as a function of oxygen partial-pressure over the range 10-3-1 atm (550 and 600 °C only). The activation energy was determined to be 55 kJ/mole (0.57 eV) and was independent of oxygen partial pressure. The oxygen partial pressure exponent was -1/6. Impedance spectra exhibited nonlinear I-V behavior, with a threshold of approximately 6 V. These results indicate that grain boundaries are governing the electrical properties of the compact. Ramifications for oxygen sensing and for grain boundary defect characterization are discussed.

AB - Sintered compacts of nanophase ZnO (approximately 60 nm average grain size, presintered at 600 °C) were made from powders (approximately 13 nm) prepared by the gas-condensation technique. Impedance spectra were taken as a function of temperature over the range 450-600 °C and as a function of oxygen partial-pressure over the range 10-3-1 atm (550 and 600 °C only). The activation energy was determined to be 55 kJ/mole (0.57 eV) and was independent of oxygen partial pressure. The oxygen partial pressure exponent was -1/6. Impedance spectra exhibited nonlinear I-V behavior, with a threshold of approximately 6 V. These results indicate that grain boundaries are governing the electrical properties of the compact. Ramifications for oxygen sensing and for grain boundary defect characterization are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0029379292&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029379292&partnerID=8YFLogxK

M3 - Article

VL - 10

SP - 2295

EP - 2300

JO - Journal of Materials Research

JF - Journal of Materials Research

SN - 0884-2914

IS - 9

ER -