Magnesium oxide is mainly used in brominated butyl rubber plugs and halogenated butyl rubber plugs, and its main functions are vulcanization accelerators and acid absorption. Requirements for magnesium oxide: In general, both light and active magnesium oxide are used. Light magnesia requires MgO ≥ 93–95%, CaO ≤ 1.5%, apparent specific…

1. Direct calcination method In this method, magnesium salt or magnesite is directly calcined at high temperature to obtain magnesium oxide. Calcining basic magnesium carbonate pentahydrate (4MgCO3·Mg(OH)2·5H2O) and magnesium hydroxide for 3h at 450°C gave magnesium oxide products with average sizes of 9nm and 4.8nm, respectively. Its reaction mechanism is: …

1. Overview As people’s awareness of environmental protection rises, and the country’s environmental protection of rubber and plastic, cable, coating and other industries is becoming more and more strict, the development of low toxicity, low smoke environmental protection flame retardants will become the pursuit of China’s flame retardant industry goal. …

Silicon steel grade magnesium oxide is a magnesia coating material used to manufacture oriented silicon steel sheets, and is a high value-added magnesia product. At present, the United States and Japan are at the forefront in the research and preparation of silicon steel grade magnesia. The research on silicon steel…

Tibet Mag stated that, based on the domestic first silicon steel continuous annealing-coating experimental unit project developed by a steel factory, research and analysis were conducted on the selection of magnesia for coating oriented silicon steel, and the development of oriented silicon steel oxidation Magnesium coating system, and based on…

Magnesite is a magnesium carbonate, its chemical formula is magnesium carbonate (MgCO3), theoretical composition: MgO47.81%, CO252.19%, density 2.9–3.1g/cm3, hardness 3–5. Magnesite can be divided into two types: crystalline and amorphous according to its crystallization state. Crystalline magnesite is rhombohexahedral, columnar, plate-like, granular, dense, soil-like and fibrous, etc. It often contains…

Abstract The invention discloses a flame-retardant polyethylene for producing fireproof aluminum-plastic board cores and a preparation method thereof, which is grafted with aluminum hydroxide, magnesium hydroxide, zinc borate, monoalkoxy titanate, and maleic anhydride Polyethylene and polyethylene are used as raw materials and prepared by high-temperature melting. …

Natural hydromagnesite (hydromagnesite compound flame retardant) Hydromagnesite is a new type of high temperature resistant flame retardant, which can release water and CO2 successively under the action of heat. These decomposition and release processes can absorb a lot of heat, thereby reducing the flame retardant. The temperature of the flame…

As a common hydrated magnesium-rich carbonate mineral, hydromagnesite [Mg5(CO3)4(OH)2·4H2O] can be used as a high-quality mineral-type flame-retardant filler in the field of polymer flame-retardant. Studies have shown that hydromagnesite mainly occurs in carbonate-type saline lakes and Quaternary lacustrine strata, and was also found in the lacustrine deposits of Jezero Crater…