... board tire making, particle board, insulation pillars, railings, artificial marble, asbestos, ordinary tile, wallboard, laying on the ground. ... As technology advances, more extensive use of magnesium oxide. Magnesium oxide is making firecrackers firecrackers special ... commonly known as magnesite, calcined powder, magnesium oxide powder. Density of 2.94, a white powder. Melting point 2852 °C, ...