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

被引：33

作者：

Hayashi, K

Hirano, M

Li, QX

Nishioka, M

Sadakata, M

Torimoto, Y

Matsuishi, S

Hosono, H

机构：

[1] Japan Sci & Technol Corp, Transparent ElectroAct Mat Proj, ERATO, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan

[2] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

[3] Kao Corp, Wakayama 6408580, Japan

[4] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2002年 / 5卷 / 09期

关键词：

D O I：

10.1149/1.1498970

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We succeeded in extracting intense O- ion beam by applying dc voltage to a microporous crystal 12CaO . 7Al(2)O(3) (C12A7) engineered to incorporate extremely large amounts of O- (1.3 x 10(20) cm(-3)) and O-2(-) (2.7 x 10(20) cm(-3)) in crystallographic cages. The O- ion beam is monochromatic and the current density (similar to2 muA/cm(2)) 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 O-2(-) ions and fast oxygen-ion-conductive nature of C12A7 allow extraction of O- ions directly from the surface. (C) 2002 The Electrochemical Society.

引用

页码：J13 / J16

页数：4

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