Pyrolysis boron nitride (PBN) crucible has the advantages of high temperature resistance, high mechanical strength, high purity, and is in contact with acids, bases, and salts without chemical reactions. It has significant anisotropy in mechanical, thermal, and electrical properties, and also has excellent microwave and infrared transmittance.

When using a pyrolysis boron nitride crucible, precautions should be taken:

1. Boron nitride is prone to moisture, and crucibles should not be stored in damp areas and should not be washed with water. Before use, it must be slowly baked to 500 degrees Celsius before use. It can be directly wiped with sandpaper or wiped with alcohol.

2.When removing the molten metal material, it is best to use a spoon to scoop it out and avoid using calipers as much as possible. If using calipers or other tools, they should match the shape of the crucible to prevent some parts from bearing too much force and shorten the service life.

3. The service life of the crucible is related to its usage, and it should be avoided as much as possible to directly spray strong oxidation flames onto the crucible, which can lead to the oxidation of the crucible raw materials and shorten their lifespan.

4. The material should be loaded according to the capacity of the crucible and should not be squeezed too tightly to prevent thermal expansion and cracking of the metal material in the crucible.

5. The temperature used in the air should not exceed 1000 degrees, as the contact surface between boron nitride and oxygen will be oxidized and peeled off.