Graphitized Graphite Sagger – Ideal Container for Sintering Lithium Battery Materials

  • Good thermal conductivity and uniform heat dissipation.
  • Excellent electrical conductivity and low resistance.
  • Good resistance to thermal shock and corrosion.
  • Can be used for smelting non-ferrous metals.
  • Can be used as a site for gas reactions.
A hollow graphitized graphite sagger with a cover is displayed.

Graphitized graphite crucibles, also known as lithium iron phosphate graphite crucibles, are mainly made of high purity graphite materials and are divided into window processing saggers and pressed saggers by production processes. They are often applied to the sintering of lithium iron phosphate battery anode materials and high temperature carbonization graphitization of cathode materials. They are used as vessels for loading cathode materials in high temperature sintering process. The graphite crucible with side wall opening avoids dust the phenomenon, improves the reducing high-temperature sintering atmosphere, and enhances the material properties. Graphite crucibles can also be used in non-ferrous metal smelting, such as copper, aluminum, zinc, silver and others, and as a place for gas reactions like N2.

A graphitized graphite crucible with a single opening and lid

Single layer graphitized graphite crucible with single opening

A graphitized graphite crucible with 4 openings and a lid

Single layer graphitized graphite crucible with multiple openings

Table 1: Specifications of Graphitized Graphite Crucibles
Item Grain Size (μm) Bulk Density (g/cm3) Compressive Strength (MPa) Flexural Strength (MPa) Porosity Specific Resistance (μΩ.m) Ash Content Shore Hardness
GS75 25 1.75 60 30 17% 15 0.08% 45
GS80 25 1.8 85 40 15% 15 0.06% 50
GS85 25 1.85 90 45 12% 15 0.05% 55
GS90 25 1.9 110 55 10% 15 0.05% 60
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.
Graphitized Graphite Sagger for Preparation of Lithium Iron Phosphate Battery Materials
Graphitized Graphite Sagger in Sintering of Lithium Iron Phosphate Anode Material

In the process of making lithium iron phosphate anode material, it needs to be sintered at high temperature to improve battery performance and stability.

  • It can safely sinter lithium iron phosphate in a high temperature environment, so that it is uniformly distributed, high density, and fine grain, thus improving battery performance.
  • It has high strength and heat resistance characteristics, and can withstand the pressure of high temperature sintering process, to ensure the safe and stable production of lithium iron phosphate.
  • It does not contain chemical substances harmful to the environment and the human body, in line with the needs of environmental protection and human health, applicable to the sintering of anode materials.
Graphitized Graphite Sagger in Cathode Material Carbonization Graphitization

In the manufacturing process of lithium-ion batteries, the cathode material needs to be carbonized and graphitized at high temperatures to improve the conductivity of the material and prevent contamination.

  • It has excellent thermal conductivity, and can be in high temperature carbonization and graphitization process uniform distribution of heat, so that the material can be balanced carbonization at high temperature, and further graphitized and purified to improve battery performance.
  • It has high strength and heat resistance performance, which can maintain stability in high temperature environments and safeguard the carbonization and graphitization process of cathode materials at high temperatures.
Automated machinery is capping the graphitized graphite sagger containing the material.