Magnesia
Definition and meaning of Magnesia in chemistry.
Magnesia, chemically known as magnesium oxide, is a white, solid mineral that occurs naturally as periclase and serves as a major source of magnesium. It is widely known for its exceptionally high thermal conductivity paired with excellent electrical insulating properties.
In more detail
Magnesia is commonly produced on an industrial scale by the calcination of magnesium carbonate or magnesium hydroxide. It has an extremely high melting point of nearly 2,852 degrees Celsius, making it a crucial refractory material for safely lining industrial furnaces, kilns, and high-temperature incinerators. Despite being an electrical insulator, it conducts heat very well, leading to its widespread use in heating elements. In the medical field, a suspension of magnesium hydroxide in water is commonly referred to as milk of magnesia and is used as an antacid to neutralize stomach acid.
Key facts
| Field | Inorganic Chemistry |
|---|---|
| Formula | MgO |
| Common name for suspension | Milk of magnesia |
Magnesia is widely used as a refractory brick material to line steelmaking furnaces because it can withstand extreme temperatures without melting or chemically degrading.
Frequently asked questions
Why is magnesia used in heating elements?
It uniquely combines excellent electrical insulation to prevent short circuits with high thermal conductivity to efficiently transfer heat.