Effects of SiO2/SiC particles on the thermal stability of carbonate eutectic salt/ceramic composite

摘要

Using Na2CO3-K2CO3 eutectic salt as phase change material,a novel composite was prepared by doping minor amount of SiO2 or SiC into eutectic salt/ceramic composite.Further,the possible effects of SiO2 or SiC on the thermal stability of the composite were investigated.The obtained results revealed that SiC can increase phase change enthalpy and meanwhile decrease thermal conductivity.But SiO2 showed little effects on thermal conductivity although it can reduced phase change enthalpy.