Application of Magnesium Oxide in Ceramics

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What is magnesium Oxide?

Magnesium dioxide, is an inorganic compound with the chemical formula of MgO. This oxide of magnesium is an ionic substance. The solid is white at room temperature. Magnesium oxide is found naturally in periclase. It is used as a raw material in magnesium smelting.

Magnesium dioxide has excellent fire resistance and insulation qualities. Magnesium oxide can be crystallized after burning at high temperatures above 1000degC. Burnt magnesia is formed when the temperature reaches 1500-2000degC. Magnesium-oxide ceramics are high-temperature resistant, have excellent conductivity and mechanical strength. They can be used to make microwave media, thick-film integrated semiconductors and glass-ceramics.

Concentrated application of magnesium oxide to ceramics

1. It is possible to manufacture a wide range of complex products using silicon nitride. These include cutting tools, seal ring, bearings and nozzles.

2. Preparation of magnesia core

It is important to note that the use temperature for the magnesia core cannot be lower than 1600°C. This means it will not react with cast metals under high temperatures. Castings with silicon-based cores have a smooth surface, which compensates for a high number of pores and small holes within the cavity. It is easy to strip, with simple equipment and a pollution-free, non-polluting stripping process. The core size is high precision, and it will not deform or break during the handling of the furnace.

3. Prepare high-toughness materials by using high purity magnesium oxide, yttrium or rare earth metal oxides in composite stabilizers. These ceramics have excellent mechanical properties as well as high temperature ageing resistance. The ceramic material has many applications, including high-temperature engineered parts and advanced materials.

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