A complete critical evaluation and thermodynamic modeling of the phase diagrams and thermodynamic properties of the MgO–Al 2 O 3 –CrO–Cr 2 O 3 system at 1 bar total pressure are presented. Optimized equations for the thermodynamic properties of all phases are obtained which reproduce all ...
(3)实验制备的钒铬渣主要由含FeO·V203, FeO·Cr2O3, MgO·V2O3等尖晶石相和Si、Ca含量较高的硅酸盐相组成,且SiO2对尖晶石的形成与长大有较大影响。(4)钒... 何桂珍 - 东北大学 被引量: 0发表: 2015年 Experimental Study and Thermodynamic Optimization of the FeO-V_2O_3 System Optimization of the...
The data reveal two magnetic transitions separating the paramagnetic phase from the antiferromagnetic ground s... R Brener,E Ehrenfreund,H Shechter,... - 《Journal of Physics & Chemistry of Solids》 被引量: 119发表: 1977年 57Fe Mssbauer and electrical studies of the (NiO)–(Cr2O3) x–...
Viscosity of molten Al2O3-Cr2O3-CaO-CaF2 slags at various Al2O3/CaO ratios Calcium fluoride, known as fluorspar is a very good flux in steel making and also has been reported to increase the alloy yield and metal recovery in alumi......
Spinel-Corundum Phase Equilibria in the Systems Mn-Cr-Al-O and Co-Cr-Al-O at 1373 K The tie lines delineating ion-exchange equilibria between MCr 2 O 4 -MAl 2 O 4 spinel solid solution, where M is either Mn or Co, and Cr 2 O 3 -Al 2 O 3 ... KT Jacob,GNK Iyengar,WK Kim...
The experimental composition of the present study are depicted in the AlO1.5-CaO-CrOx phase diagram (Fig. 1b), while the Conclusion In the pursuit of a Cr(VI) dominant region in the Al2O3–CaO–Cr2O3 system, we found that higher Cr2O3 content not necessarily produces more Cr(VI)....
phase. The metastable b-quartz solid solution must develop below 750 C, and otherwise it will change to b-spodumene solid solution. Additionally, the phase diagramof SiO 2 says the stable b-quartz can form in the temperature range of 230e570 C, or else it will immediately transform to a-...
Al2O3体系的相图 Fig 1 3 MgO Al2O3 phase diagram 1 3 1 镁铝尖晶石制备方法镁铝尖晶石制备方法 镁铝尖晶石在自然界中是一种接触变质产物 也有少数来自火成岩和沉积岩 但天然产出很少 耐火材料用镁铝尖晶石都是由MgO 和Al2O3人工合成的 用含MgO 和Al2O3的原料合成镁铝尖晶石的生产方法有两类 电熔法...
Moreover, addi-tions of nucleating agents such as TiO2, ZrO2, Cr2O3,and Ni have been tried in MgO base glasses in or-der to get more insight into the controlled crystalli-sation process. One of the possible phases formedaccording to the MgO-Al2O3-SiO2phase diagram iscordierite (Mg2Al...
Ordered and disordered states are energetically unfavorable with respect to phase separation. Interatomic distances do not change over the whole Cr composition. The Cr–O distance is always larger than the Al–O distance. We obtained a phase-separated-type phase diagram with a miscibility gap....