Li在液态Al中扩散系数的测定研究

Study on Measurement of Diffusion Coefficient of Li Atom in Liquid Aluminium

首次尝试利用开路电位-浓度曲线法测定合金的浓度,并用阳极计时电位法快速测定Li在液态Al中的扩散系数,720℃下Li在液态Al中的扩散系数D_(Li/Al)=4.94×10^(-5)cm^2·s^(-1),与根据Stokes-Einstein方程计算得到的理论值D_(Li/Al)=4.85×10^(-5)cm^2·s^(-1)相吻合。

The tess potential-concentration curve was first applied to measure the concentration of an alloy. Attempt to use the V-c curve of Al-Li alloy in measuring the diffusion coeffictent of Li atom in liquid aluminium with anode chronopotentiometry at 720℃, was made and D_(Li/Al=4.94×10^(-5)cm^2·s^(-1) was obtained. The value is well consistent wish the theoretical value, D_(Li/Al)=4.85×10^(-5)cm^2·s^(-1) in terms of Stokes-Einstein equation.