Surface tension of molten salt directly affects the liquid phase transport coefficient,while nanoparticles can regulate the surface tension of molten salts.SiO2 nanoparticles with different concentrations were dispersed into a binary nitrate salt by high-temperature melting method,and five molten salt nanofluids were prepared.Then surface tension of the base salt and the five molten salt nanofluids was then measured by the pulling-escape method,and the correlations were fitted between the surface tension and the salt temperature.In addition,the micromorphology of the nanofluids was analyzed by scanning electron microscope method.Results shown that the SiO2 nanoparticles increased the surface tension of the nanofluids,and the surface tension decreased with the increase of salt temperature.
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基金资助
国家自然科学基金(51206004)
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