Studies on Salt Hydrates for Latent Heat Storage. IV. Crystallization in the Binary System CH3CO2Na–H2O

In the binary system CH3CO2Na–H2O, crystallization temperature on slow cooling from a melt, glass transition temperature and crystallization temperature on slow heating from a quenched vitrified solid were measured by varying the CH3CO2Na concentration. The crystallization behaviour in the binary system CH3CO2Na–H2O is characterized as follows; (1) crystallization region of ice extends into the CH3CO2Na-rich side from the eutectic composition, (2) a hard crystallization region exists in the composition between CH3CO2Na 35wt% and 40wt%, (3) the crystallization temperature range of CH3CO2Na·3H2O is from −50 °C to −30 °C and very narrow.