1. Thermal stability: According to the quench acute thermal using conditions of graphite crucible, we will specially design the production procedure, so as to ensure the reliability of product quality. 2. Corrosion resistance: Even and fine basic design will delay the erosion of crucible. 3. Impact resistance: Graphite crucible can bear high thermal impact, so any process can be carried out. 4. Acid resistance: The adding of special materials will greatly improve the quality of crucible, especially its index of acid resistance., and will prolong the service life of graphite crucible. 5. High heat Conduction: High content of fixed carbon ensures the good heat conduction, shorten the time of dissolution, and remarkably reduce the energy consumption. 6. Control of metal pollution: The component of material under strict control will ensure that graphite crucible will not pollute the metals when dissolving. 7. Quality stability: The process technology of forming under high pressure and quality guarantee system will fully ensure the stability of quality