HEAT STORAGE MATERIAL

PURPOSE: To provide a latent heat storage material which is prevented from supercooling in freezing, prepared by adding at least one nucleator selected from among activated carbon, Na2B4O7, Na3AlF6 and Sr(OH)2.8H2O, to NiNO3. 6H2O. CONSTITUTION: The heat storage material consists of NiNO3.6H2O and at least one nucleator selected from among activated carbon, Na2B4O7, Na3AlF6 and Sr(OH)2.8H2O. NiNO3.6H2O has a fusing point of about 54°C and a latent heat capacity of 31Cal/deg and is suitable as heat storage material for room heating and hot water supply at 50W60°C, but it has a demerit in that the difference between the fusing temperature and the freezing starting temperature (ΔTsc) is too large. The addition of the nucleator reduces ΔTsc to about a half to one- third.COPYRIGHT: (C)1983,JPO&Japio