Messi’s MgO are high purity, micronized grades of magnesium oxide that are used in the manufacture of sili
con grain-oriented steel for high efficiency distribution transformer cores, specialty ceramics, and coatings.
In the annealing process, MgO react with the silicon steel to form a glass-like film during the high temperature anneal, which then acts as an electrical insulator between corelaminations in an electrical transformer.