Reversible phase change compositions of calcium chloride hexahyd

Details Reversible phase change compositions of calcium chloride hexahyd Reversible phase change compositions of calcium chloride hexahyd

1982-09-13

1983-11-01

Kittle, John E.

Compositions

Frost-preventing, ice-thawing, thermostatic, thermophoric,...

423497, 423421, 423551, C09K 506

Patent

active

044129319

ABSTRACT:
A reversible liquid/solid phase change composition comprising a mixture of hydrated CaCl.sub.2 and a potassium salt whose anion forms a substantially less soluble salt with calcium and in which the potassium salt modifies the semi-congruently melting behavior of CaCl.sub.2.6H.sub.2 O to the extent that the mixture approaches congruent melting behavior. Preferred examples of such compositions are CaCl.sub.2 admixed with potassium sulfate, potassium carbonate or potassium phosphate. The composition preferably includes nucleating additives to modify and suppress the supercooling properties of the liquid phase of the composition. The composition is adapted to be incorporated into an encapsulating means for use as a heat storage device.

REFERENCES:
patent: 3495953 (1970-02-01), Gaska et al.
patent: 3498758 (1970-02-01), Gaska et al.

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