Available thermodynamic and phase diagram data have been evaluated for all phases in the Na2O-SiO2 and K2O-SiO2 systems at 1 bar pressure from 298 K to above the liq-uidus temperatures. All reliable thermodynamic and phase diagram data have been simultaneously optimized in order to obtain one ...
作者: 姜中宏,唐永兴 展开 摘要: 本文应用相图模型,对Na_2O—B_2O_3—SiO_2;BaO—B_2O_3—SiO_2;Na_2O—K_2O—SiO_2和CaO—MgO—SiO_2玻璃系统的性质(比重,折射率)进行了研究,应用相图模型方法的计算值和实验值比较,二者在变化的规律性方面,完全一致.相图模型认为:玻璃和晶体具有相似的结构,多...
The experimental results are visualized in a phase diagram (Fig. 2). The most important equilibrium, annite+muscovite+3 quartz=garnet+2 sanidine+2 H2O has been treated thermdynamically. The heat of reaction is about 49 kcal. Based upon this value, the heat of formation for almandite garnet...
An optimized set of thermodynamic functions for the K 2 O-SiO 2 system at 10 5 Pa pressure was obtained by considering available phase diagram and thermodynamic data. KSi 0.25 O and SiO 2 were selected as components for the liquid phase. With respect to these components, the highly non-...
K2O-SiO2Thermodynamic optimizationPhase diagramThermal analysisSealed Pt capsuleKey phase diagram experiments and thermodynamic opJournal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy ...
PhasediagramThermalanalysisSealedPtcapsuleKey phase diagram experiments and thermodynamic optimization were performed for the binary K2O-SiO2 system. For the first time, the temperature of eutectic reaction: Liquid → K4SiO4 + K2SiO3 was successfully measured at 714 ± 6 °C using thermal analysis ...
Key phase diagram experiments were conducted to reveal the phase diagram of the KO-MgO system using thermal analysis and equilibration techniques with sealed platinum capsules. The peritectic reaction of liquid + MgO → KMgOwas determined at 1131 K ± 14 K (858 °C ± 14 °C) for the ...
The set of optimized model parameters obtained for all phases reproduces available and reliable thermodynamic properties and phase diagram data as well as the melt structure of the K2O-Al2O3-SiO2 system within the experimental error limits.
The singularities give rise to a number of intriguing phase diagram features, including azeotropes. From the results presented here, it is predicted that the occurrence of margarite and paragonite in pelitic rocks is controlled by equilibria related to the singularities. The presence of these white...
The singularities give rise to a number of intriguing phase diagram features, including azeotropes. From the results presented here, it is predicted that the occurrence of margarite and paragonite in pelitic rocks is controlled by equilibria related to the singularities. The presence of these white...