Silicon steel sheet is called electric porcelain steel sheet abroad, and its main purpose is to make motor iron core and transformer iron core. In order to meet the requirements of the electrical and physical properties of the iron core, there is a high-temperature annealing process of 1200–1250 degrees Celsius for the silicon steel sheet during the manufacturing process of the grain-oriented silicon steel sheet. In order to complete the regular orientation arrangement of the iron metal atoms during the annealing process and form an excellent insulating film on the surface of the silicon steel sheet, this process must take 7 days to complete. In such a long high-temperature process, the general silicon steel The piece will turn into a lump of iron. Therefore, it is necessary to apply a high-temperature annealing release agent between the silicon steel sheets to prevent the sintering of the silicon steel sheets, and at the same time, the release agent must be able to form an excellent insulating film with the silicon on the surface of the silicon steel sheet.
The role of magnesium oxide is firstly as a high-temperature annealing separator in the manufacture of silicon steel sheets. At the same time, it has the function of forming a magnesium silicate glass insulating coating with silicon, and it can remove impurities such as sulfur and phosphorus in silicon steel during high-temperature reactions. effect. Hebei Messi Biology Co., Ltd. stated that silicon steel grade magnesium oxide must have the following properties:
Comments