The discovery of magnesium oxide dates back to ancient times, although people then did not recognize it as a distinct chemical substance. Minerals containing magnesium-such as dolomite and magnesite-were already in use; these minerals decompose at high temperatures to yield magnesium oxide.
The production of magnesium oxide typically involves the following steps:
1. Mineral extraction: Magnesium oxide is derived from magnesium-rich minerals; common sources include magnesite, dolomite, and magnesium found in seawater.
2. Mineral processing: Magnesium oxide is extracted from the minerals through high-temperature calcination or other chemical processing methods.
3. Purification: The magnesium oxide undergoes further purification via chemical or physical methods to remove impurities and produce a high-purity product. The discovery and widespread application of magnesium oxide represent a significant milestone in the fields of chemistry and materials science; its origins are closely linked to the discovery of the element magnesium, its properties, and its forms of occurrence in nature.