The subsolidus structure of the four-component system MgO – Al2O3 FeO TiO2 was studied in six temperature ranges. Geometric-topological characteristics phases under study have been determined, topological graphs relationship elementary tetrahedrons constructed, their volumes, degrees asymmetry for all ranges found. optimal regions compositions production spinel-containing materials predicted, w...

Peridotite xenoliths in arc volcanoes are very rare, usually small and remain poorly studied. Much of the earlier work focused on peridotites affected by re-crystallization, metasomatism and veining that took place shortly before the eruption of the host magmas; such lithologies may not be widespread in the mantle wedge.This study reports petrographic, major and trace element data for 17 large,...

Limonitic nickel laterite always contains abundant high smelting components such as Al2O3 and MgO, which is extremely adverse to sintering. To weaken the negative effect of components, in this study, sinter pot tests limonitic were conducted for better sintering performance by optimization (MgO + Al2O3)/SiO2 mass ratio at same basicity. The relevant mechanism was revealed theoretical analysis m...

Prenucleation refers to the phenomenon of atomic ordering in liquid adjacent a liquid/solid interface at temperatures above its nucleation temperature. It produces precursor for heterogeneous and thus has strong influence on process. Oxide particles, including magnesia, spinel, alumina, are inevitably formed during liquid–metal handling casting. They may act as sites potential grain refinement....

The selective oxidation of dimethyl ether (CH3OCH3) to formaldehyde (HCHO) was carried out on MoOx species with a wide range of MoOx surface density and structure supported on MgO, Al2O3, ZrO2, and SnO2. Raman and X-ray absorption spectroscopies were used to probe the structure of these MoOx domains, as they evolved from monomeric species into two-dimensional polymolybdate domains and MoO3 clus...

We present a multilateral theoretical study of bound polarons in oxide compounds MgO and α-Al2O3 (corundum). A continuum theory at arbitrary electron-phonon coupling is used for calculation of the energies of thermal dissociation, photoionization (optically induced release of an electron (hole) from the ground self-consistent state), as well as optical absorption to the nonrelaxed excited state...

Few reports exist on the effect of basicity refining slag inclusions in 15-5PH stainless steel and its removal efficiency. In this study, effects various basicities formation efficiency molten were investigated. To investigate chemical makeup non-metallic liquid steel, laboratory experiments thermodynamic calculations conducted CaO-MgO-SiO2-Al2O3-CaF2 with steel. samples that had reacted high-b...