Electric field emission of high density O- ions from 12CaO·7Al2O3 engineered to incorporate oxygen radicals

Katsuro Hayashi; M. Hirano; Q. X. Li; M. Nishioka; M. Sadakata; Y. Torimoto; S. Matsuishi; H. Hosonoa

doi:10.1149/1.1498970

Electric field emission of high density O^- ions from 12CaO·7Al₂O₃ engineered to incorporate oxygen radicals

Katsuro Hayashi, M. Hirano, Q. X. Li, M. Nishioka, M. Sadakata, Y. Torimoto, S. Matsuishi, H. Hosonoa

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

We succeeded in extracting intense O^- ion beam by applying dc voltage to a microporous crystal 12CaO·7Al₂O₃ (C12A7) engineered to incorporate extremely large amounts of O^- (1.3 × 10²⁰ cm^-3) and O₂^- (2.7 × 10²⁰ cm^-3) in crystallographic cages. The O^- ion beam is monochromatic and the current density (∼2 μA/cm²) is higher by three orders of magnitude than the maximum value recorded for yttrium-stabilized ZrO₂ (YSZ). A surface metal electrode, essential for the YSZ to dissociate a drifted O^2- in the bulk into an O^- and an electron on the surface, is not needed for the C12A7. The presence of extremely large concentrations of O^- and O₂^- ions and fast oxygen-ion-conductive nature of C12A7 allow extraction of O^- ions directly from the surface.

Original language	English
Journal	Electrochemical and Solid-State Letters
Volume	5
Issue number	9
DOIs	https://doi.org/10.1149/1.1498970
Publication status	Published - Sept 1 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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title = "Electric field emission of high density O- ions from 12CaO·7Al2O3 engineered to incorporate oxygen radicals",

abstract = "We succeeded in extracting intense O- ion beam by applying dc voltage to a microporous crystal 12CaO·7Al2O3 (C12A7) engineered to incorporate extremely large amounts of O- (1.3 × 1020 cm-3) and O2- (2.7 × 1020 cm-3) in crystallographic cages. The O- ion beam is monochromatic and the current density (∼2 μA/cm2) is higher by three orders of magnitude than the maximum value recorded for yttrium-stabilized ZrO2 (YSZ). A surface metal electrode, essential for the YSZ to dissociate a drifted O2- in the bulk into an O- and an electron on the surface, is not needed for the C12A7. The presence of extremely large concentrations of O- and O2- ions and fast oxygen-ion-conductive nature of C12A7 allow extraction of O- ions directly from the surface.",

author = "Katsuro Hayashi and M. Hirano and Li, {Q. X.} and M. Nishioka and M. Sadakata and Y. Torimoto and S. Matsuishi and H. Hosonoa",

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doi = "10.1149/1.1498970",

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T1 - Electric field emission of high density O- ions from 12CaO·7Al2O3 engineered to incorporate oxygen radicals

AU - Hayashi, Katsuro

AU - Hirano, M.

AU - Li, Q. X.

AU - Nishioka, M.

AU - Sadakata, M.

AU - Torimoto, Y.

AU - Matsuishi, S.

AU - Hosonoa, H.

PY - 2002/9/1

Y1 - 2002/9/1

N2 - We succeeded in extracting intense O- ion beam by applying dc voltage to a microporous crystal 12CaO·7Al2O3 (C12A7) engineered to incorporate extremely large amounts of O- (1.3 × 1020 cm-3) and O2- (2.7 × 1020 cm-3) in crystallographic cages. The O- ion beam is monochromatic and the current density (∼2 μA/cm2) is higher by three orders of magnitude than the maximum value recorded for yttrium-stabilized ZrO2 (YSZ). A surface metal electrode, essential for the YSZ to dissociate a drifted O2- in the bulk into an O- and an electron on the surface, is not needed for the C12A7. The presence of extremely large concentrations of O- and O2- ions and fast oxygen-ion-conductive nature of C12A7 allow extraction of O- ions directly from the surface.

AB - We succeeded in extracting intense O- ion beam by applying dc voltage to a microporous crystal 12CaO·7Al2O3 (C12A7) engineered to incorporate extremely large amounts of O- (1.3 × 1020 cm-3) and O2- (2.7 × 1020 cm-3) in crystallographic cages. The O- ion beam is monochromatic and the current density (∼2 μA/cm2) is higher by three orders of magnitude than the maximum value recorded for yttrium-stabilized ZrO2 (YSZ). A surface metal electrode, essential for the YSZ to dissociate a drifted O2- in the bulk into an O- and an electron on the surface, is not needed for the C12A7. The presence of extremely large concentrations of O- and O2- ions and fast oxygen-ion-conductive nature of C12A7 allow extraction of O- ions directly from the surface.

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Electric field emission of high density O^- ions from 12CaO·7Al₂O₃ engineered to incorporate oxygen radicals

Abstract

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