STUDY OF SURFACE STOICHIOMETRY AND THERMIONIC EMISSION USING LAB

被引：50

作者：

STORMS, EK

MUELLER, BA

机构：

[1] Los Alamos Scientific Laboratory, University of California, Los Alamos

来源：

JOURNAL OF APPLIED PHYSICS | 1979年 / 50卷 / 05期

关键词：

D O I：

10.1063/1.326323

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The variables which influence the surface composition of vaporizing compounds have been studied using the behavior of LaB6 as an example. The thermionic work function of LaB6 has been determined as a function of surface stoichiometry. A nearly constant value of 2.93 eV for the effective work function was observed from the LaB6+LaB4 boundary up to approximately LaB6.06. A further increase in boron content caused a steep increase reaching 3.40 eV at the LaB6+LaB 9 boundary at 1500 K. The interior composition which produces a surface composition having a high emission flux and the lowest attrition rate is in the high boron region near LaB6.5, not at the stoichiometric composition.

引用

页码：3691 / 3698

页数：8

共 22 条

[1] LANTHANUM HEXABORIDE ELECTRON EMITTER [J].