What causes transverse cracks in quartz bowls during use?
Due to the impact of a hard object, such as throwing the casting material into a crucible or using a hard object such as an iron rod to strike the bottom. In addition, the thermal expansion in 1b can also cause damage to the quartz bowl;
2. Place the graphite crucible on the slag or an unsuitable crucible base. When removing the crucible, if the position of the graphite crucible clamp is too high and too much force is applied, it will cause cracks on the surface of the crucible that cannot be clamped by the clamp;
3. The graphite crucible was not installed correctly. When installing a new crucible, if the refractory soil is tightly squeezed under the crucible mouth, during use, the cooling shrinkage of the crucible will cause the stress point to concentrate on the most part of the graphite crucible, resulting in cracks in the quartz crucible.
The above are the reasons for the transverse cracks in the quartz bowl, and we should try our best to avoid the occurrence of the above situations.
Editor: Miranda