Phase pure Na-?''-alumina ceramics are excellent electrolytes for molten-salt and all-solid-state batteries. However, controlled processing of this complex material is required to obtain the desired phase content, as can accommodate variable amounts sodium within its conduction slab. On one hand, addition dopant ions (e.g. Li+, Mg2+) influences stability content Na-?''-alumina. other ?''-alumin...

The use of electric arc furnace slag (EAFS) as sole precursor to produce alkali-activated mortars has been experimentally investigated. EAFS, a by-product the steel recycling industry, is coarse material with unevenly distributed and size-extensive particles. Milling EAFS was required achieve cement-like sized powder before it could be used precursor. Different combinations sodium hydroxide (Na...

В южной части Скифской плиты, в структурно-формационной зоне (СФЗ) Передового хребта (ПХ) Большого Кавказа (БК), известны ранне-среднедевонские вулканические образования, с которыми ассоциируют колчеданные месторождения Урупского района, а также Бесскесское, Быковское, Даутское, Худесское и многочисленные рудопроявления. Петролого-геохимические исследования девонских вулканитов позволяют уточни...

High-sensitivity radioluminescence (RL) and thermoluminescence (TL) measurements were carried out on samples of natural leucite (with 2.95% of Na2O) from Campania Vessa (Italy). Samples were annealed to modify the charge compensation through alkali metal self-diffusion and to produce luminescence centres. High-temperature powder diffraction, scanning electron microscopy and chemical analyses we...

The structure of the glass forming system (V2O5)x – (Na2O · P2O5)(1–x), (x = 0–0.4), has been investigated using Raman spectroscopy. The stretching vibrations of various phosphate groups, connected to phosphorus or vanadium atoms, have been assigned. Variation of the composition leads to structural changes where the sodium metaphosphate -P–O–P-chains break and then reconnect with the oxovanadiu...