نتایج جستجو برای: magnesium aluminate spinel
تعداد نتایج: 42527 فیلتر نتایج به سال:
Stoichiometric zinc aluminate (ZnAl2O4) and zinc gallate (ZnGa2O4) are simulated in the framework of the shell model, for which a new set of two-body interatomic potential parameters has been developed. Using these parameters, a reasonable prediction is made for elastic and dielectric constants of ZnAl2O4 and ZnGa2O4. Both oxides are stable against decomposition to the component oxides. The fit...
In this study, the treatment of fly ash and steel making slag in aqueous ammonia chloride has been conducted. These zero-value wastes have distinctively high concentrations of magnesium, calcium and iron. The ammonium chloride has been employed as the leaching reagent to extract MgO out of fly ash and slag, and the dissolved cations in the leachate were subsequently precipitated by carbonation....
The rate of ammonia synthesis over a nanoparticle ruthenium catalyst can be calculated directly on the basis of a quantum chemical treatment of the problem using density functional theory. We compared the results to measured rates over a ruthenium catalyst supported on magnesium aluminum spinel. When the size distribution of ruthenium particles measured by transmission electron microscopy was u...
The nonlinear transmission curves of [100]- and [110]-cut Co2+:MgAl2O4 crystals at 1.54 μm were measured experimentally. A phenomenological model was established to analyze the experimental results, in which resonant absorption crystal characterized by four groups linear dipoles oriented along body diagonals ([111], [ $${1}\stackrel{\mathrm{-}}{1}\stackrel{\mathrm{-}}{1}$$ ], $$\stackrel{\mathr...
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