Thermodynamic Activity of Na[sub 2]O-B[sub 2]O[sub 3] Melt

Abstract

not Available.

Thermodynamic optimization of the Na2O-B2O3 pseudo-binary system

“…Figure 7 presents the calculated partial molar Gibbs energy of Na 2 O in liquid at 1123-1137 K, together with the experimental data. 7 Calculated partial molar Gibbs energy of Na 2 O in liquid together with experimental data [15][16][17][18] (reference state: 95 at.% B 2 O 3 at 1123 K) edged, Park and Min [19] present different results compared with previous work by Itoh et al, [18] which is consistent with the calculated result in this paper. As illustrated in Fig.…”

“…This indicates that introduction of BO 3 −3 and B 4 O 7 −2 anions into the liquid model is reasonable. [15][16][17][18] A good fit is realized within the experimental error. 5, a temperature dependency of the enthalpy of mixing is evident in the B 2 O 3 -rich region.…”

“…[15] Using the same technique, Stegmaier and Dietzel, [16] Sato et al, [17] and Itoh et al [18] contributed to the measurements of the partial molar Gibbs free energy of Na 2 O at 1123 K. Very recently, by a chemical equilibration technique, the activity of Na 2 O in a Na 2 O-B 2 O 3 melt was measured at 1373 K by Park and Min. [15] Using the same technique, Stegmaier and Dietzel, [16] Sato et al, [17] and Itoh et al [18] contributed to the measurements of the partial molar Gibbs free energy of Na 2 O at 1123 K. Very recently, by a chemical equilibration technique, the activity of Na 2 O in a Na 2 O-B 2 O 3 melt was measured at 1373 K by Park and Min.…”