With the increasing application of saggers, graphite saggars are the most used ones, especially in graphite saggars for sintering lithium battery materials. However, some people will ask questions. Then, what should be paid attention to when purchasing graphite saggars.

Whether there is a standard to measure, it is urgent for the editor to deal with this problem. Now I have summarized the following 5 points to make a rough judgment of the advantages and badness of saggers.

According to the characteristics of the use of saggers, graphite saggers are required to have the following specifications:

1. Outstanding resistance to rapid cold and heat.

After repeated heating and cooling, the sagger can still maintain a certain mechanical strength without breaking.

2. Sufficient mechanical strength at room temperature.

So that the saggar will not be damaged when it is being transported and loaded on the vehicle to accept the weight.

3. Higher refractoriness.

Generally, it is required to be 300°C higher than the firing temperature of the mounted crystal.

4. Sufficient softening temperature under high temperature load.

Generally, it is required to be 50-100℃ higher than the firing temperature of the product, and then ensure that the sagger will not soften and deform at the firing temperature of the product.

5. Outstanding thermal conductivity and certain gas permeability, and then ensure that the heat of the incineration product and the atmosphere medium can be quickly transferred to the product.

The heat conduction function of the sagger is related to the nature of the raw materials and the composition of the material, and the gas permeability depends on the size of the porosity and the number of penetrating pores.