摘要
本文研究了在不同加速电压、电子束电流、电子束直径及电子束与样品作用方式下碱金属硅酸盐玻璃中微区成分的变化规律,指出加速电压越低,电子束电流越小,电子束直径越大,越能使玻璃中Na_(Kα),K_(Kα)等特征X射线的强度趋于稳定,并提出采用电子束扫描而不是定点的定量分析才能得到较精确的结果的新方法.
Accurate compositional quantitative analysis value cannot be obtained because the characteristic X-ray intensities of Na_(K(?)) and K_(K(?))cannot be stable during the electron beam bombarding of alkali silicate glass. The authers have researched on the compositional change regularity of alkali silicate glass under the conditions of various accelerating potentials, electron beam currents, electron beam diameters and the ways of the beam acting on glass samples. It has been pointed out that the lower the accelerating potential is, the smaller the decreasing tendency of Na_(Ka) and K_(Ka) ray intensities along with the bombarding time is under the conditions of fixed beam current and diameter. The smaller the beam current is, the more stable the Na_(Ka) and K_(Ka) ray intensities are for fixed accelerating potential and beam current. And the larger the beam diameter is, the more stable the Na_(Ka) and K_(Ka) intensities are for fixed beam current and accelerating potential. Under the condition of electron scanning, the Na_(Ka) and K_(Ka) intensities keep stability in spite of various other conditions. The authors have developed a new method for quantitative analysis of alkali silicate glass, in which electron beam scans but does not bombards glass samples. By means of this method, the compositions of silicate glasses such as sodium-lime, potassium-lime, sodium-zinc and sodium-boron have been analysed quantitatively. The results showed the errors are all less than 2%.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
1992年第5期58-61,共4页
Bulletin of the Chinese Ceramic Society
