with the mantle transition zone, the MAS phase diagram markedly simplifies, with the three pure oxides (i.e. MgO, periclase; Al2O3, corundum; SiO2, stishovite) displaying a primary phase field and majorite-pyrope garnet as the only, and most important, ternary liquidus phase in the ...
Belmonte, DonatoOttonello, GiulioZuccolini, Marino VetuschiAttene, MarcoElsevier B.V.Chemical GeologyBelmonte, D.; Ottonello, G.; Vetuschi Zuccolini, M.; Attene, M. The system MgO-Al2O3-SiO2 under pressure: A computational study of melting relations and phase diagrams. Chem. Geol. 2017, ...
A complete literature review, critical evaluation, and thermodynamic modeling of the phase diagrams and thermodynamic properties of all oxide phases in the MgO-Al2O3, CaO-MgO-Al2O3, and MgO-Al2O3-SiO2 systems at 1 bar total pressure are presented. Optimized model equations for the thermodynam...
This study utilized the single hot thermocouple technique to examine the dissolution behavior of lumped magnesium oxide (MgO) in CaO–Al2O3–SiO2 ternary slags. The aluminum oxide (Al2O3) content in the slag (C/S = 1) varied from 10% to 30%; the MgO sphere with a diameter of 1 mm...
Experimental Determination of the Phase Diagram of the CaO-SiO2-5 pctMgO-10 pctAl2O3-TiO2 System Ti-bearing CaO-SiO2-MgO-Al2O3-TiO2 slags are important for the smelting of vanadium-titanium bearing magnetite. In the current study, the pseudo-melting te... Junjie,Shi,Lifeng,... - 《Me...
CaO–SiO2–Al2O3–MgO is a basic system of ironmaking slag in which CaO and MgO are mainly come from the flux, SiO2 and Al2O3 are mainly from the raw materials. Effect of raw material composition on phase equilibrium of the slag can be described by a pseudo-ternary system (CaO?+?
Thermodynamic activity of Na2O in Na2O-CaO-SiO2, Na2O-MgO-SiO2, and Na2O-CaO-SiO2-Al2O3 melts at 1400°C A gas phase equilibration technique was used to generate Na 2 O isoactivity data at high-silica compositions in the systems Na 2 O-CaO-SiO 2 , Na 2 O-MgO-SiO 2 , and Na ...
Phase equilibria in the system SiO2–MgO–Al2O3–CaO–Cr2O3 (SMACCR) and their bearing on spinel/garnet lherzolite relationships An experimental study in this system at 900-1400oC and 15-35 kbar has given assemblages of two pyroxenes + or - garnet + or - spinel + or - olivine. The...
(2007): High-temperature phase relations and topological constraints in the quaternary system MgO-Al2O3-SiO2-Cr2O3: an experimental study. Am. Min- eral., 92, 735-747.Brigida,C,Poli,S,Valle,M.High-temperature phase relations and topological constraints in the quaternary system MgO-Al2O3...
We also designed two ceramic systems in the Li-rich region of the Li2O–MgO–TiO2 ternary system, which received little attention in the past decades, because many excellent single-phase ceramics, such as Li2MgTiO4, Li2MgTi3O8 and MgTiO3, have been found in the Ti-rich region. The ...