What is the reason that affects the bending deformation of ceramic roller?

The chemical corrosion of the roller bar destroyed various properties of the roller bar, such as elastic coefficient, stiffness, strength and so on. , thus affecting the performance of the roller and the running quality of the product. In addition, the serious consequence caused by chemical corrosion is the quenching crack of the roll bar. Pull the roller out of the kiln and let it cool naturally in the air. When it reaches a certain temperature, a large area of natural fracture will occur. The quenching crack of the roll increases the consumption of the roll.

The results show that the glass body produced in the ceramic roller produces new crystal phases due to subsequent crystallization, such as anorthite, albite, garnet and spinel. The change of vitrification and crystallization leads to the change of physical and mechanical properties of the material, which leads to the quenching crack of the roll after a period of use.

To sum up, the corrosion and fracture process of rollers can be summarized as follows:

Inhale corrosive elements from the outside (by contact or gas phase exchange);

Decomposition of existing phases (except ZrO2);

The formation of glass phase becomes the carrier of corrosive elements invading the roll bar;

Vitreous crystallization;

The pores at the interface between the corrosion layer and the ceramic material body increase;

The increase and propagation of microcracks and the different thermo-mechanical properties of crystalline phases lead to quenching cracks during cooling.