1. Observe whether the hardness of the ceramic rod meets the standard, and compare it with the preset data in a specific way. If the error is too large, it will be judged as unqualified.

2. At the same time, the thermal conductivity, wear resistance and corrosion resistance of the ceramic rod were measured.

3. The chemical stability of ceramic rods also needs to be measured in order to cope with special conditions, such as high or low temperature environment.

4. According to the scope of application of the product, the fire resistance of the ceramic rod needs to be determined. In fact, as a non-metallic material, the fire resistance is very high.

5. The density of the ceramic rod is the most important. Only if the density is qualified, the service life of the ceramic rod can reach the standard, and it will not become a defective product.