Intense thermal field electron emission from room-temperature stable electride

Yoshitake Toda; Sung Wng Kim; Katsuro Hayashi; Masahiro Hirano; Toshio Kamiya; Hideo Hosono; Takeshi Haraguchi; Hiroshi Yasuda

doi:10.1063/1.2149989

Intense thermal field electron emission from room-temperature stable electride

Yoshitake Toda, Sung Wng Kim, Katsuro Hayashi, Masahiro Hirano, Toshio Kamiya, Hideo Hosono, Takeshi Haraguchi, Hiroshi Yasuda

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

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Abstract

Thermal field emission (TFE) from a flat surface of 12CaO·7 Al2 O3 (C12A7) electride was examined at temperatures up to 900 °C and applied external voltages of 0-6 kV in a 10-5 Pa vacuum. TFE started to occur at ∼650 °C and steeply increased at ∼900 °C to reach ∼80 μA (∼1.5 A cm-2) when an extraction field of 105 V cm-1 (an extraction voltage of 6 kV) was applied. The work function estimated from the Richardson-Dushman equation was ∼2.1 eV, which is rather smaller than that of La B6 (∼2.7 eV). It is experimentally confirmed that the emission with a current of ∼50 μA (from a 80 μm diameter area) was stably sustained for more than 90 h. The efficient and stable emission at relatively low temperature in a moderate vacuum atmosphere strongly suggests that the C12A7 electride has high potential for TFE applications.

Original language	English
Article number	254103
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	87
Issue number	25
DOIs	https://doi.org/10.1063/1.2149989
Publication status	Published - 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2149989

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@article{96f89355ff414b48a2cc7dd513fc6afc,

title = "Intense thermal field electron emission from room-temperature stable electride",

abstract = "Thermal field emission (TFE) from a flat surface of 12CaO·7 Al2 O3 (C12A7) electride was examined at temperatures up to 900 °C and applied external voltages of 0-6 kV in a 10-5 Pa vacuum. TFE started to occur at ∼650 °C and steeply increased at ∼900 °C to reach ∼80 μA (∼1.5 A cm-2) when an extraction field of 105 V cm-1 (an extraction voltage of 6 kV) was applied. The work function estimated from the Richardson-Dushman equation was ∼2.1 eV, which is rather smaller than that of La B6 (∼2.7 eV). It is experimentally confirmed that the emission with a current of ∼50 μA (from a 80 μm diameter area) was stably sustained for more than 90 h. The efficient and stable emission at relatively low temperature in a moderate vacuum atmosphere strongly suggests that the C12A7 electride has high potential for TFE applications.",

author = "Yoshitake Toda and Kim, {Sung Wng} and Katsuro Hayashi and Masahiro Hirano and Toshio Kamiya and Hideo Hosono and Takeshi Haraguchi and Hiroshi Yasuda",

note = "Funding Information: This work is supported by the Grant-in-Aid for Creative Science and Research (No. 16GS0205) from the Japanese Ministry of Education, Culture, Sports, Science, and Technology.",

year = "2005",

doi = "10.1063/1.2149989",

language = "English",

volume = "87",

pages = "1--3",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Intense thermal field electron emission from room-temperature stable electride

AU - Toda, Yoshitake

AU - Kim, Sung Wng

AU - Hayashi, Katsuro

AU - Hirano, Masahiro

AU - Kamiya, Toshio

AU - Hosono, Hideo

AU - Haraguchi, Takeshi

AU - Yasuda, Hiroshi

N1 - Funding Information: This work is supported by the Grant-in-Aid for Creative Science and Research (No. 16GS0205) from the Japanese Ministry of Education, Culture, Sports, Science, and Technology.

PY - 2005

Y1 - 2005

N2 - Thermal field emission (TFE) from a flat surface of 12CaO·7 Al2 O3 (C12A7) electride was examined at temperatures up to 900 °C and applied external voltages of 0-6 kV in a 10-5 Pa vacuum. TFE started to occur at ∼650 °C and steeply increased at ∼900 °C to reach ∼80 μA (∼1.5 A cm-2) when an extraction field of 105 V cm-1 (an extraction voltage of 6 kV) was applied. The work function estimated from the Richardson-Dushman equation was ∼2.1 eV, which is rather smaller than that of La B6 (∼2.7 eV). It is experimentally confirmed that the emission with a current of ∼50 μA (from a 80 μm diameter area) was stably sustained for more than 90 h. The efficient and stable emission at relatively low temperature in a moderate vacuum atmosphere strongly suggests that the C12A7 electride has high potential for TFE applications.

AB - Thermal field emission (TFE) from a flat surface of 12CaO·7 Al2 O3 (C12A7) electride was examined at temperatures up to 900 °C and applied external voltages of 0-6 kV in a 10-5 Pa vacuum. TFE started to occur at ∼650 °C and steeply increased at ∼900 °C to reach ∼80 μA (∼1.5 A cm-2) when an extraction field of 105 V cm-1 (an extraction voltage of 6 kV) was applied. The work function estimated from the Richardson-Dushman equation was ∼2.1 eV, which is rather smaller than that of La B6 (∼2.7 eV). It is experimentally confirmed that the emission with a current of ∼50 μA (from a 80 μm diameter area) was stably sustained for more than 90 h. The efficient and stable emission at relatively low temperature in a moderate vacuum atmosphere strongly suggests that the C12A7 electride has high potential for TFE applications.

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DO - 10.1063/1.2149989

M3 - Article

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 25

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ER -

Intense thermal field electron emission from room-temperature stable electride

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