一、引言离子固体受到电子束轰击时,如果含有可迁移阳离子,则它们可能向电子束轰击点迁移并俘获电子后转变为金属原子在固体表面沉积积累,从而影响电子探针(EPMA)的成份分析和扫描电镜(SEM)、透射电镜(TEM)的形貌观察。以前曾经发现某些含碱金属氧化物组份的硅酸盐玻璃和矿物在经受电子束轰击时,组成元素的X射线计数率不稳定,碱金 I. INTRODUCTION When ionic solids are bombarded by electron beam, if they contain transportable cations, they may migrate to electron beam bombardment point and then trap electrons to transform into metal atoms that accumulate and accumulate on the solid surface, thus affecting the composition of electron probe (EPMA) Analysis and scanning electron microscopy (SEM), transmission electron microscopy (TEM) morphology observed. It has previously been found that certain silicate glasses and minerals containing alkali metal oxide components undergo an electron beam bombardment and that the X-ray count rate of the constituent elements is not stable.