期刊
ELECTROCHEMICAL AND SOLID STATE LETTERS
卷 5, 期 9, 页码 J13-J16出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1498970
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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.
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