Solid‐liquid interfacial energy of the Bi0.7Pb0.3SrCaCu1.8Ox glass

The solid‐liquid interfacial energy is estimated by use of the nucleation frequency of isothermal crystallization on aging in Bi0.7Pb0.3SrCaCu1.8Ox glassy samples above glass transition temperature. The value of solid‐liquid interfacial energy Q is about 74.7 mJ/m2. The Q value is often expressed by use of enthalpy change ΔHf, Avogadro’s number N and molar volume V; Q = CΔHf/(N1/3V2/3). The constant C obtained is 0.38, which is between 0.32 for covalent bonded elements and 0.45 for metals.