The production of electrical grade magnesium oxide in China started in the 1960s. With the rapid development of the national economy, especially since the reform and opening up, people's living standards have improved, and household electric heating appliances have become widely used. The demand for magnesium oxide for insulating materials is also growing from time to time.

Although the scale of international consumption of electrical grade magnesium oxide is expanding, it still cannot meet the international market demand by then, and the shortfall in electrical grade magnesium oxide demand is exported from countries such as the United States and Japan.

As used in electric heating appliances, electrical grade magnesia has special requirements in many types of fused magnesia, including chemical properties, particle shape, particle size distribution, crystal shape, etc. Because electrical grade magnesium oxide is directly related to the operating temperature and service life of the electric heating tube, it is necessary to select electrical grade magnesium oxide with the same function and grade according to the electrothermal control manufacturing process.

International and foreign requirements for electrical grade magnesium oxide are getting higher and higher. Because this product is easily affected by moisture in the air, magnesium hydroxide crystals are formed on its surface, which greatly reduces its electrical function; also due to its different appearance, electrical function In good times and bad, the disposal of these results is an important indicator of the quality of the business. At present, the world uses inorganic silicon polymer to treat the surface of electrical grade magnesium oxide, which effectively improves its water resistance, and its moisture resistance has caught up with the national level of prosperity. In terms of high temperature resistance, inorganic additives such as layered silicates, oxides of boron and aluminum, rare earth metal oxides, iron oxides, etc. are added, and then heat treated to obtain high-quality fused magnesia for electric heating. , in order to improve its electrical function and make it suitable for use in high temperature range, thereby improving the utilization rate of electrical grade magnesium oxide raw materials.