Thermodynamics of Vaporization in the Aluminum Oxide—Boron Oxide System^1a

Thermodynamic measurement of (Al2O3+B2O3) system by double Knudsen cell mass spectrometry

“…Indeed, the activities in the single liquid phase region indicate negative deviation from ideal behavior, since mole fraction of B 2 O 3 in the specimen, X B 2 O 3 , is 0.965 assuming that chemical composition of the specimen was the same as the weight ratio mixed before the measurement. This is in good agreement with the results by Blackburn et al [1] and Stolyarova et al [2] on this point. And the activity is closer to that of ideal solution with increase in the experimental temperature.…”

“…The Gibbs free energy change of reaction (3) is shown in figure 4 with the literature values. The Gibbs free energy estimated in this study is smaller than that reported by Blackburn et al [1] and Stolyarova et al [2], and the slope of the Gibbs free energy change estimated here, which corresponds to the entropy change, is larger than either of those. By extrapolating equation (5) above 1750 K the Gibbs free energy change agrees with that by Stolyarova et al [2] also reported the value by single Knudsen cell mass spectrometry.…”

“…Thermodynamic information on the (Al 2 O 3 + B 2 O 3 ) binary system is important for various high temperature processes in ceramics, glass, and metallurgical industries, but the information available is extremely limited [1][2]. Recently, a process of removing B from Si by slag refreshing to produce solar cell grade Si by refining metallurgical grade Si using various fluxes has been studied [3][4][5].…”

Thermodynamic properties and structure of gaseous metaborates

“…IV Elements, Bismuth, Neodymium, and ManganeseBlackburn et al[66] studied the vaporization process in the B 2 O 3 -Al 2 O 3 system under reducing conditions,…”

Thermodynamic modeling of the B2O3–SiO2 and B2O3–Al2O3 systems

“…The only data on the thermodynamic properties of the two compounds (not considering the estimated values listed in Barin [37] and Dörner et al [38]) are from the work of Blackburn et al [39]. The only data on the thermodynamic properties of the two compounds (not considering the estimated values listed in Barin [37] and Dörner et al [38]) are from the work of Blackburn et al [39].…”