用等温饱和法研究温度及熔盐组分对SiO2在KCl-NaCl-NaF体系中溶解度的影响.通过对熔盐急冷试样的X射线衍射分析和对该体系各物质间反应的热力学分析,确定了SiO2的溶解机理.结果表明:SiO2的溶解机理为6NaF(L)+3SiO2(s)=Na2SiF6(L)+2Na2SiO3(L);SiO2的溶解度随温度的升高、组元NaF摩尔分数的增加而增大,并且在KCl与NaCl摩尔比为1时,SiO2的溶解度与NaF摩尔分数旱线性关系.
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