Current situation of fused magnesium oxide for electric heating in China

The biggest disadvantage of fused magnesium oxide is hygroscopicity. It makes the electric performance of electric heating element getting worse. As a result, in order to prevent moisture absorption, someone has to make elements drying or deal the ends with seal. This will not only cause trouble in the processing, but also result in some sealing difficulties. For this reason, people are keen on moisture-proof research in fused magnesium oxide.

In moisture-proof processing, the best technology is using organic silicide (most of the use is silicone) to coat on magnesia powder particle surface, the coated magnesia with resin has a very good effect on moisture-proof, and maintain the insulation resistance in the cold or certain temperature (below 500 degrees Celsius). According to the quality of the raw material and organic silicide quality of heat and moisture, the moisture-proof magnesium oxide can be divided into cold damp magnesium oxide (the working temperature of electric heat pipe shape element is less than 400 degrees Celsius) and medium temperature moisture magnesium oxide (the working temperature of electric heat pipe shape element is less than 600 degrees Celsius).

The two processing methods are that firstly selecting fused magnesium oxide which has reached the quality standard, then through crushing, screening, ratio of particle size distribution. Mixing a certain amount of organic silicon resin into the reactor, then stirring evenly, the following is to remove organic solvent and make the resin curing, finally cooling, screening agglomerate powder.

This production technology is widely applied in recent years. Our fused magnesium oxide quality has caught up with the developed countries. And the products of Hebei Meishen chemical technology Group Co.,Ltd have entered the international market.