At present, the main filling materials for electric heating tubes are quartz sand and alumina. Why is Liaoning cable-grade magnesium oxide powder the main filling material? Next, the editor will explain in detail for everyone.

Liaoning cable-grade magnesium oxide powder is mainly because it is an electrical insulator, a good heat conductor, high safety, cheap, easy to buy, and large in storage. Therefore, it is obtained in Liaoning cable-grade magnesium oxide powder in an electric heating tube. It has been widely used for a long time.

Magnesium oxide needs to be melted at a temperature of 28O0 degrees after being refined. Make the crystallization completely stable and cool into a block. Due to the influence of cohesion, the purity of the middle part is higher (specific gravity 3.58-3.6). This block is crushed by a hammer and then the iron filings are removed and the mesh is mixed, and it is used now. The filling material of magnesium oxide powder, the mesh size used now is 40-325 mesh.

What is Liaoning cable-grade magnesium oxide powder? What are its categories and characteristics?

Liaoning cable-grade magnesium oxide powder refers to the fused crystalline magnesium oxide block that is crushed by alkali and matched with different particle sizes (mesh) in a certain proportion, directly or modified, used in tubular electric heating elements as an insulating medium for heat conduction at high temperatures.

Liaoning cable grade magnesium oxide powder

Classification

Ordinary magnesium oxide, classification codeP;

Low-temperature moisture-proof magnesium oxide, classification codeD;

Medium temperature moisture-proof magnesium oxide, classification codez3

High temperature magnesium oxide, classification codeG.

Features

Have good insulation performance and electrical strength.

It has good thermal conductivity and can transfer the heat from the heating wire to the metal tube。

Good heat resistance and vibration resistance。

It easily absorbs carbon dioxide and water in the air, and is slightly soluble in pure water. After absorbing carbon dioxide, the solubility increases rapidly, and it reacts with water to form a hydroxide stream, which causes the insulation resistance to drop rapidly. For electric heating tubes filled with magnesia, the insulation performance of the points will decrease, leading to electric breakdown, and the heating tubes will be damaged.。

Liaoning cable-grade magnesium oxide powder is the main filling material, so much is introduced. I hope our explanation can help everyone. See you next time.！