Abstract:

Abstract:In this paper,an Al2O₃ ceramic packaging material for heat storage was prepared using direct sintering method and its corrosion behavior in molten LiNO₃ was researched.Through the analyses of X ray diffraction and scanning electron microscope (SEM),it was found that the chemical composition of prepared ceramic packaging material is stable and the main ingredients are silicate minerals.The molten salt immersion test of the ceramic packaging material showed that the weight of ceramic sample first increases and then decreases as the extension of immersion time.The weight losses of ceramic sample that based on its initial weight are -2.4% (weight gain),1.9% and 2.3% when the immersion times are 10h,50h and 100h,respectively.Through the morphology analysis of SEM,it was found that the surface of ceramic sample is corroded gradually as the extension of immersion time.The results showed that the prepared ceramic has good thermal stability and it could be used as the packing material for heat storage molten salt.

Key words:

Keywords:heat storage ceramic, molten LiNO₃, corrosion resistance