DSC Study of Melting and Solidification of Salt Hydrates

摘要

Most salt hydrates expecially those proposed for thermal-energy-storage applications, melt incongruently. In static systems, this property often leads to differences between the enthalpy of fusion and enthalpy of solidification. By means of differential scanning calorimetry (DSC), these differences have been determined for several salt hydrates. The hydrates studied include Na sub 2 SO sub 4 .10H sub 2 O, Na sub 4 P sub 2 O sub 7 .10H sub 2 O, Mg(NO sub 3 ) sub 2 .6H sub 2 O, MgCl sub 2 .6H sub 2 O, CuSO sub 4 .5H sub 2 O, and Na sub 2 B sub 4 O sub 7 .10H sub 2 O. (ERA citation 04:023328)