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

Abstract
The solid‐liquid interfacial energy is estimated by use of the nucleation frequency of isothermal crystallization on aging in Bi0.7Pb0.3SrCaCu1.8O x 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 ΔH f , Avogadro’s number N and molar volume V; Q = CΔH f /(N 1/3 V 2/3). The constant C obtained is 0.38, which is between 0.32 for covalent bonded elements and 0.45 for metals.