热离子发射
工作职能
材料科学
钇
肖特基效应
电流密度
硼
单晶
离子
蒸发
Crystal(编程语言)
原子物理学
场电子发射
镱
分析化学(期刊)
电子
真空蒸发
共发射极
肖特基二极管
图层(电子)
兴奋剂
二极管
冶金
纳米技术
光电子学
结晶学
热力学
氧化物
薄膜
化学
程序设计语言
色谱法
计算机科学
有机化学
物理
量子力学
作者
Daniil Voronovych,Anatoliy Taran,Oksana Podshyvalova,N. Yu. Shitsevalova,В. Б. Филипов,A. V. Dukhnenko
出处
期刊:Solid State Phenomena
日期:2019-04-01
卷期号:289: 47-52
被引量:1
标识
DOI:10.4028/www.scientific.net/ssp.289.47
摘要
Experimental data on thermionic current density and electron work function of YB 12 (100) at T = 1218 – 1978 K in high vacuum (p < 10 -4 Pa) are first introduced. Temperature dependences of the thermionic current density and effective electron work function are presented without extrapolation to the zero-field currents because of the anomalous Schottky effect. The temperature dependences of theYB 12 electron work function can be described by linear functions at certain temperature intervals. Preferential boron evaporation and additional ion bombardment by the residual gases ions and evaporated boron ions results in appearance of new phases depleted of boron on the YB 12 surface. As a result, an YB 4 – YB 6 double layer on the YB 12 single crystal surface has formed. The appearance of the new boride phases, depleted of boron, on the emitting surface causes an increase of thermionic current density compared with individual YB 12 .
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