Thermodynamic Properties in the CsBO2-SiO2 System (高温質量分析特集号)

概要

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A mass-spectrometric Knudsen effusion method is used for measuring partial pressures of CsBO2(g) and Cs2(BO2)2(g) over melts in the CsBO2-SiO2 system. From the partial pressures, thermodynamic activities and partial molar Gibbs energies of the CsBO2 and SiO2 components, molar Gibbs energies of mixing, and excess molar Gibbs energies of mixing are determined in the whole composition range at 1000 K. Thermodynamic activities of both the CsBO2 and SiO2 components show negative deviation from Raoults law. The melts in the CsBO2-SiO2 system are concluded to be thermodynamically more stable than those in the RbBO2-SiO2 system caused by the lower excess molar Gibbs energies of mixing.
1999-02-01