The invention discloses a
phase change cold-accumulation material and a preparation method thereof. The
phase change cold-accumulation material is prepared from, by
mass, 50-60% of
sodium sulfafe decahydrate, 10-15% of
sodium bromide, 2-5% of
ammonium chloride, 3% of aluminum
oxide, 1-3% of
sodium borate, 1-2% of
boric acid, 4% of nanometer
silicon dioxide, 2% of nanometer
magnesium silicate and the balance deionized water. The preparation method comprises the steps of sequentially adding the sodium sulfafe decahydrate, the
sodium bromide, the
ammonium chloride, the sodium borate and the
boric acid into a heating tank provided with a blender, conducting mixing and uniform stirring, controlling the mixture temperature within the range from 60 DEG C to 70 DEG C, conducting stirring till the mixture is molten completely, adding the aluminum
oxide, the nanometer
silicon dioxide and the nanometer
magnesium silicate in the high-speed stirring process, replenishing the balance deionized water, stirring the mixture uniform, preserving the temperature for one hour at the temperature of 40 DEG C, cooling the mixture to be
room temperature, and obtaining the uniform plasty fluid form
phase change cold-accumulate material. Compared with the prior art, the phase change cold-accumulate material has the advantages of being high in potential heat value, stable in
system, few in phase-
change temperature hysteresis phenomenon, low in repeated
cycling degradation and the like, raw materials are easy to obtain, the production is easy to conduct, the safety and nontoxicity are achieved, and the material has practical value in the field of heating, ventilation and
air conditioning (
HVAC).