Calorimetric investigation of Pb–Bi system

Enthalpy increment and heat capacity of Pb3Bi

“…This data was used for calculating enthalpy of mixing of Pb 0.62 Bi 0.38 (l), at 457 K, using the following reaction scheme: (16) where H i is the heat change for corresponding equations (i) in the above reaction scheme. The enthalpy of mixing of Pb(l) and Bi(l) to form a liquid solution, Pb 0.62 Bi 0.38 at 457 K from the above relation was calculated as −3.6 kJ/mol, which is comparable with enthalpy of mixing of liquid solution reported at 448 K by Agarwal et al [18]. The enthalpy increment data obtained at temperatures above peritectic decomposition till liquidus temperature indicate enthalpy increment of ((Pb) + l) system and enthalpy of partial decomposition and melting of (Pb).…”

“…There was no visible interaction between the quartz ampoule and the compound. Formation of pure compound was confirmed by XRD analysis, as reported in our earlier work [18]. The enthalpy increment of the compound was measured using high temperature Calvet calorimeter from Setaram, France.…”

“…A thermodynamic table (Table 2) of this compound was generated using the enthalpy of formation of the compound from the literature [18] and heat capacity values of the compound from the present work. The entropy of formation of the compound at 298.15 K, was estimated from random mixing of the elements and excess entropy of the compound using the following equations: T (K) f H 0 (J/mol) f S 0 ideal (J/mol K) f S 0 (J/mol K) f G 0 (J/mol) fef (J/mol K) f G 0,hcp (J/mol)…”

“…In fact there is no experimental data available in the literature for heat capacity or enthalpy increment of the intermetallic compound. In our earlier work [18] we have discussed enthalpy of formation of this compound at different temperatures. In this paper we will present the enthalpy change for decomposition reaction of the compound at peritectic temperature, 457 K, and enthalpy increment and heat capacity data of the compound.…”

Interaction study between MOX fuel and eutectic lead–bismuth coolant

“…5). The Bi and Pb 0.7 Bi 0.3 diffraction peaks observed on pellet 4-M5U are due to the LBE droplets remaining at the surface and are consistent with LBE phase diagram at room temperature [22]. The results of the lattice parameter refinements are summarized in Table 5.…”