The composition and properties of two types calcined magnesium oxide powders, differing in chemical composition, are investigated. difference phase determines the different behavior powders during firing, which is smoothed only at a temperature more than 1850 °C. microstructure obtained briquettes differs amount glass phase, type size pores, as well quality crystals periclase. From studied deca...

Commercial talcs are pulverized mineral products with a variable chemical and mineralogic composition, widely used in industry. Although generally white, they have color variations. The aim of this study was to establish relationships between color parameters and the chemical and mineralogic composition of commercial talc samples, in order to investigate the causes of color. Chlorite, dolomite,...

Magnesia is mainly produced from carbonate sources (magnesite (MgCO3)), and seawater brines (MgCl2). The calcination of magnesite the precipitation brine using quicklime (CaO) are processes that have significant CO2 footprints, even before considering burning hydrocarbons required to meet energy demand. There also amounts silica-based magnesia raw materials available worldwide, such as serpenti...

Abstract Inexpensive sintered glass-ceramic glaze was prepared from a mixture of Egyptian trachyte with either limestone or magnesite. A represented rock pulverized to powder (<0.083 mm) and also both The well mixed batches were melted near 1450 °C/3 h temperature then the glass melt quenched in water, dried, finally shaped moulds. sintering process pre-shaped glasses, within 1000-1100 °C ra...