Messi’s high purity magnesium oxide, micronized electrical steel grades of magnesium oxide that are used in the manufacture of silicon grain-oriented steel for high efficiency distribution transformer cores, specialty ceramics, and coatings.
In the annealing process, magnesium oxide react with the silicon steel to form a glass-like film during the high temperature anneal, which then acts as an electrical insulator between core laminations in an electrical transformer.
The product quality of silicon steel grade magnesia prepared by brine ammonia method mainly includes chemical purity, hydration rate, viscosity and particle size.
① Chemical purity: The chemical purity of silicon steel grade magnesium oxide is generally required to be above 98%.
② Hydration rate: The hydration rate of silicon steel grade magnesium oxide is generally required to be below 2%.
③ Viscosity: The viscosity of silicon steel grade magnesium oxide is generally required to be between 40 and 80cp.
④ Particle size: The particle size of silicon steel grade magnesium oxide is generally required to be between 10 and 30 μm.
The preparation of silicon steel grade magnesium oxide by brine ammonia method has the following advantages:
① The sources of raw materials are wide and the cost is low.
②The process flow is shorter and the production cycle is shorter.
③ Product quality is stable and easy to control.
Magnesium oxide coating for electrical steels and the method of coating.PDF