Electric Field Emission of High Density O − Ions from 12CaO ⋅ 7Al2 O 3 Engineered to Incorporate Oxygen Radicals
Electric Field Emission of High Density O − Ions from 12CaO ⋅ 7Al2 O 3 Engineered to Incorporate Oxygen Radicals
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12CaO ⋅ 7Al2 O 3 中高密度 O − 离子的电场发射，旨在结合氧自由基
DOI：
10.1149/1.1498970
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发表时间：
2002
影响因子：
--
通讯作者：
H. Hosono
中科院分区：
文献类型：
--
作者：
K. Hayashi;M. Hirano;Quanxin Li;M. Nishioka;M. Sadakata;Y. Torimoto;S. Matsuishi;H. Hosono
通过在微孔晶体12CaO·7Al_2O_3(C12A7)中加入极大量的O-(1.3×10~(20)cm~(-3))和O~(2-)(2.7×10~(20)cm~(-3))，我们成功地提取了强氧离子束。氧离子束是单色的，电流密度(∼2μA/cm2)比Y稳定的ZrO2(YSZ)的最大值高出三个数量级。C12A7不需要表面金属电极，对于YSZ来说，表面金属电极对于YSZ将体内漂移的O2-解离为O-和表面的电子是必不可少的。C12A7存在极大浓度的O-和O-2离子，以及快速的氧离子传导特性，可以直接从表面提取O-离子。
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 2 0 cm - 3 ) and O 2 - (2.7 X 10 2 0 cm - 3 ) in crystallographic cages. The O - ion beam is monochromatic and the current density (∼2 μA/cm 2 ) is higher by three orders of magnitude than the maximum value recorded for yttrium-stabilized ZrO 2 (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 O - 2 ions and fast oxygen-ion-conductive nature of C12A7 allow extraction of O - ions directly from the surface.