The surface tension and viscosity of mixed molten salt KNO3-NaNO2 were studied in the temperature range from 190-250 ℃.The method of curve fitting was used for analyzing the results.The study shows that the surface tension of mixed molten salt KNO3-NaNO2 was linearly correlative to the temperature.The viscosity was non-linearly correlative to the temperature.As the temperature rises,the surface tension and viscosity were both decreased.As the mass ratio of KNO3 rises,the surface tension was decreased while the viscosity was in-creased.%在190~250℃的温度范围内,研究了KNO3-NaNO2二元熔盐体系的表面张力及粘度变化情况,并进行了数据的曲线拟合。研究表明,KNO3-NaNO2二元熔盐体系的表面张力与温度呈线性相关,粘度与温度呈非线性相关；随温度升高,表面张力及粘度均减小；随KNO3比例升高,表面张力减小,粘度增大。
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