ZrO_2对nNaF·AlF_3-Al_2O_3-CaF_2熔盐体系密度的影响

Effect of ZrO_2 Content on the Density of nNaF·AlF_3-Al_2O_3-CaF_2 Molten Salt System

根据阿基米德定律,测定了nNaF·AlF3-Al2O3-CaF2-ZrO2熔盐体系的密度,并研究了温度、ZrO2质量分数和NaF与AlF3物质的量比对体系密度的影响.结果表明,密度随着温度的升高和NaF与AlF3物质的量比的降低明显减小.在温度为980℃时,2.4NaF·AlF3-3%Al2O3-3%CaF2（质量分数,下同）电解质密度和ZrO2（0~5%）质量分数之间存在线性关系,即随着ZrO2质量分数的升高,电解质密度增加,线性方程为ρt（g·cm-3）=0.028 44.w（ZrO2）＋2.045（r=0.9992）.在所研究范围内,当电解质中加入ZrO2时,每增加1%ZrO2,密度相应提高约0.02 g·cm-3.

The density of n NaF＂ A1F3-A1203-CaF2-ZrO2 molten salt system with different molar ratio of NaF to A1F3 and ZrO2 contents was determined based on Archimedes law, and the effects of temperature and ZrO2 content were investigated. The results show that the density decreases with the increasing of temperature and the decreasing of molar ratio of NaF to A1F3. At 980 ~C, there is a good linear relationship between the density of 2.4NaF＂ A1F3-3wt% A1203-3wt % CaF2 molten salt system and the ZrO2 content d 0-5wt%, which can be expressed as pt （g· cm-3） = 0. 028 44 w （ZrO2） ＋ 2. 045 （ r = 0. 9992）. Within the present study range, the electrolyte density increases approximately by 0.02 g/cm3 with lwt% ZrO2 addition.