The article presents the results of experimental studies magnesia composite materials layered structure obtained from molding mixtures various densities. aim work is to synthesize and study characteristics three–layer materials. Molding were combined binders based on caustic magnesite technogenic silica-containing Specially synthesized porous aggregates liquid-glass raw used as fillers. Technol...

Magnesia-silica mixed oxide catalysts of different texture and morphology were prepared for the ethanol-to-butadiene (ETB) reaction. Magnesia low high specific surface area (SSA) made by thermal decomposition magnesium nitrate. High-SSA MgO was using hard-templating (HT) method. Mesoporous carbon, obtained carbonizing a resorcinol-formaldehyde polymer used as template. The carbon pores saturate...

Plato’s attitude toward the poets and poetry has always been a fl ashpoint of debate, controversy and notoriety, but most scholars have failed to see their central role in the ideal cities of the Republic and the Laws, that is, Callipolis and Magnesia. In this paper, I argue that in neither dialogue does Plato “exile” the poets, but, instead, believes they must, like all citizens, KRITERION, Be...

Magnesium compounds have been used in the healthcare setting for many years. Over-the-counter (OTC) products like magnesium oxides and magnesium hydroxides (magaldrate, Antiflux, Lowsium, Riopan) are used as antacids; magnesium salicylates (Doan’s pills, Magan, Mobidin) are used as non-narcotic analgesics; and magnesium salts (Milk of Magnesia) are used for constipation. This article focuses on...

Mesoporous alumina and magnesia were prepared using various polymers, poly(ethylene glycol) (PEG), poly(vinyl alcohol) (PVA), poly(N-(2-hydroxypropyl) methacrylamide) (PHPMA), and poly(dimethylacrylamide) (PDMAAm), as porogenic structure matrices. Mesoporous alumina exhibits large Brunauer–Emmett–Teller (BET) surface areas up to 365 m2 g−1, while mesoporous magnesium oxide possesses BET surface...

In this paper, a 3D transient multi-physical field model is developed to capture the complex processes inside fused magnesia furnace. The multi-physics integrates electromagnetism, thermodynamics, decomposition reactions, and flow. three-phase submerged furnace includes an arc, magnesite ores, melting pool, solidification ingot. For more comprehensive analysis of optimal design industrial opera...

A critical event model for the evolution of numberand area-weighted misorientation distribution functions (MDFs) during grain growth is proposed. Predictions from the model are compared to numberand area-weighted MDFs measured in Monte Carlo simulations with anisotropic interfacial properties and several initial orientation distributions, as well as a dense polycrystalline magnesia sample. The ...

Abstract: Efforts have been carried out in order to use microsilica to develop a forsterite bond rather than other types of binders in the basic refractory castables. According to the higher drying rate and sinterability of colloidal silica, it has been proposed in the recent years. In the present work, effects of replacement of microsilica by colloidal silica evolution of forsterite bond have ...