Reversible phase change compositions of calcium chloride...

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

C - Chemistry, Metallurgy

09

K

31/34

C09K 5/06 (2006.01)

Patent

CA 1173643

ABSTRACT OF THE DISCLOSURE A reversible liquid/solid phase change compo- sition comprising a mixture of hydrated CaCl2 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 CaCl2?6H2O to the extent that the mixture approaches congruent melting behavior. Preferred examples of such compositions are CaCl2 admixed with potassium sulfate, potassium carborate or potassium phosphate. The composition preferably includes nucleating additives to modify and suppress the super- cooling properties of the liquid phase of the composi- tion. The composition is adapted to be incorporated into an encapsulating means for use as a heat storage device. C-30,960

413438

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