The density of free electrons in bulk materials and grain boundaries was calculated in this paper.
利用正电子湮没技术 (PAT)测量了不同化学计量比二元Ni3Al合金及不同Zr含量Ni3Al合金的正电子寿命谱 ,并估算了合金基体和晶界缺陷处的自由电子密度 。
The density of free electrons is lower in the bulk of TiAl alloy than that of Ti or Al metal which implicates that some valence electrons of Ti and Al atoms are localized when they aggregate to form TiAl alloy.
测量了TiAl,Ti50 Al4 8Zr2 和Ti50 Al4 8Nb2 的正电子寿命谱 ,并利用正电子寿命参数分别计算了合金基体和缺陷态的自由电子密度。
Study on free ion concentrations of heavy metals in soils by Donnan Membrane Technique;
利用道南膜技术(DMT)研究土壤中重金属自由离子浓度