THE DENSITY AND THE BINARY DIFFUSION COEFFICIENTS OF LIQUID Na–Pb ALLOYS WITH A LOW CONTENT OF LEAD
The density and the thermal expansion coefficients of liquid sodium and sodium-lead alloys (2.50, 5.00, 7.50, 9.99, and 21.03 at. ％ Pb) have been determined using γ-ray attenuation technique over the temperature range from liquidus line to 950 K. The experimental uncertainty of the density measurements is estimated to be within ± 0.2-0.4 ％. The temperature and concentration dependences of the thermal properties for Na-Pb system have been constructed. In particular, it has been confirmed that the concentration dependence of the molar volume of the liquid system strongly deviates from the law for ideal solution. Kinetics of homogenisation of the melts with mean composition of 2.50 and 5.00 at. ％ Pb has been investigated in the temperature range from 550 to 970 K. The measurement technique is based on direct registration of the evolution of composition profile in inhomogeneous liquid sample. The coefficients of binary diffusion D have been derived from these experiments. The experimental uncertainty of the D measurements is estimated to be within ± 10 ％. The diffusion coefficients vary from 4.6.10-9 m2/s at 550 K to 18.3.10-9 m2/s at 970 K.
Rashid A. Khairulin Sergei V. Stankus Rasul N. Abdullaev Aleksandr G. Mozgovoi
Kutateladze Institute of Thermophysics Novosibirsk 630090, Russia Novosibirsk State University Novosibirsk 630090, Russia Joint Institute of High Temperature Moscow 125412, Russia
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
145-148
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）