White corundum powder It is a material with relatively stable chemical properties, and it is suitable for the application of advanced refractories, so what is the reason for the layering of our white corundum powder?
1. When white corundum powder is processed into the finished product, the mold sleeve becomes larger when it is under high pressure, and shrinks when it is not pressurized, so that the middle layer cracks and bulges up and down;
2. The gas in the profile material does not run out, the two sides have been compacted and concentrated in the middle to form an air layer, and the gas expands into an intermediate layer after canceling the external pressure;
3. The moisture moves downward from the pressure side, and the double-sided pressure causes the middle and lower parts of the water to be concentrated and the strength is reduced, so it also causes the starting waste, even if there is no crack after molding, cracks may occur during firing, so it is more reasonable to dry the plate when drying;
4. When the pressure is very high, the blank has a high elastic elastic elastic effect, and the particle size of white corundum powder is closer to the contact between particles, and the smaller the change in stress transfer.
In addition, it adopts double-sided pressure in pressing, and the middle layer of the product is the weakest combination, the friction is different from the middle and bottom, and the elasticity is different, so the layer crack is produced under the action of elastic stress.
