Research on the preparation and properties of multi-component molten salts

Multi-component molten salts composed of potassium nitrate, sodium nitrite, sodium nitrate with 5% additive A were prepared by statically mixed. The experiments results showed that molten salt with 5% additive A had higher thermal stability and its best operating temperature would be increased to 550°C from 400-500°C. Thermal stability and thermal cycling analysis showed that molten salt with 5% additive A had lower freezing point, and the loss of nitrite content and deterioration time of molten salt were also reduced at the same time. XRD and DSC tests also indicated loss of latent heat in molten salts was decreased. Therefore, thermal storage efficiency of molten salts was increased.