Natural Flake Graphite – A Versatile Graphite Material

  • Good electrical & thermal conductivity.
  • Excellent thermal shock resistance and corrosion resistance.
  • Self-lubrication performance, low fraction coefficient.
A pile of natural flake graphite
Description

Natural flake graphite is a mineral that is formed through long-term geological metamorphism of carbonaceous rocks. It is a kind of natural crystalline graphite with a fish scale like appearance and presents a layered structure. Natural flake graphite has excellent high temperature resistance, corrosion resistance, thermal shock resistance, radiation resistance, high strength, good toughness, lubrication, plasticity, as well as electrical and thermal conductivity. It is commonly used to make refractory materials, electrode materials for lithium batteries, bipolar plates for fuel cells, brake pads, casting coatings, lubricants, etc. typically appears as fibrous or needle-like crystalline aggregate.

According to the fixed carbon content by mass, natural flake graphite can be divided into four categories: high purity graphite (≥ 99.99%), high carbon graphite (94.00%–99.00%), medium carbon graphite (80%–93%), and low carbon graphite (50%–75%). The technical specifications and main uses of each type of natural flake graphite are shown in the table below.

Table 1: Key Indicators & Uses of High Purity Graphite
Model Fixed Carbon Content Moisture Weight of Screen Residue Main Uses
LC300-99.99 ≥ 99.99% ≤ 0.20% ≥ 80.0% Flexible graphite sealing material
LC(-)150-99.99 ≥ 99.99% ≤ 0.20% ≤ 20.0% Replace platinum crucible for chemical reagent melting
LC(-)75-99.99 ≥ 99.99% ≤ 0.20% ≤ 20.0%
LC(-)45-99.99 ≥ 99.99% ≤ 0.20% ≤ 20.0%
LC500-99.9 ≥ 99.90% ≤ 0.20% ≥ 80.0% Flexible graphite sealing material
LC300-99.9 ≥ 99.90% ≤ 0.20% ≥ 80.0%
LC180-99.9 ≥ 99.90% ≤ 0.20% ≥ 80.0%
LC(-)150-99.9 ≥ 99.90% ≤ 0.20% ≤ 20.0% Lubricant base
LC(-)75-99.9 ≥ 99.90% ≤ 0.20% ≤ 20.0%
LC(-)45-99.9 ≥ 99.90% ≤ 0.20% ≤ 20.0%
Notes:
  • Product model is composed of its classification code, fineness (μm) and fixed carbon content.
  • The symbol (-) indicates that the screen underflow is less than or equal to 20.0% after sieving on a test sieve with a sieve diameter of 150 μm.
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.
Table 2: Key Indicators & Uses of High Carbon Graphite
Model Fixed Carbon Content Volatile Moisture Weight of Screen Residue Main Uses
LG500-99 99.00% 1.00% 0.50% ≥ 75.0% Filling material
LG300-99 99.00% 1.00% 0.50% ≥ 75.0%
LG180-99 99.00% 1.00% 0.50% ≥ 75.0%
LG150-99 99.00% 1.00% 0.50% ≥ 75.0%
LG125-99 99.00% 1.00% 0.50% ≥ 75.0%
LG100-99 99.00% 1.00% 0.50% ≥ 75.0%
LG(-)150-99 99.00% 1.00% 0.50% ≤ 20.0% Lubricant base and coating material
LG(-)125-99 99.00% 1.00% 0.50% ≤ 20.0%
LG(-)100-99 99.00% 1.00% 0.50% ≤ 20.0%
LG(-)75-99 99.00% 1.00% 0.50% ≤ 20.0%
LG(-)45-99 99.00% 1.00% 0.50% ≤ 20.0%
LG500-98 98.00% 1.00% 0.50% ≥ 75.0%
LG300-98 98.00% 1.00% 0.50% ≥ 75.0%
LG180-98 98.00% 1.00% 0.50% ≥ 75.0%
LG150-98 98.00% 1.00% 0.50% ≥ 75.0%
LG125-98 98.00% 1.00% 0.50% ≥ 75.0%
LG100-98 98.00% 1.00% 0.50% ≥ 75.0%
LG(-)150-98 98.00% 1.00% 0.50% ≤ 20.0%
LG(-)125-98 98.00% 1.00% 0.50% ≤ 20.0%
LG(-)100-98 98.00% 1.00% 0.50% ≤ 20.0%
LG(-)75-98 98.00% 1.00% 0.50% ≤ 20.0%
LG(-)45-98 98.00% 1.00% 0.50% ≤ 20.0%
LG500-97 97.00% 1.20% 0.50% ≥ 75.0% Lubricant base and electric brush raw materials
LG300-97 97.00% 1.20% 0.50% ≥ 75.0%
LG180-97 97.00% 1.20% 0.50% ≥ 75.0%
LG150-97 97.00% 1.20% 0.50% ≥ 75.0%
LG125-97 97.00% 1.20% 0.50% ≥ 75.0%
LG100-97 97.00% 1.20% 0.50% ≥ 75.0%
LG(-)150-97 97.00% 1.20% 0.50% ≤ 20.0%
LG(-)125-97 97.00% 1.20% 0.50% ≤ 20.0%
LG(-)100-97 97.00% 1.20% 0.50% ≤ 20.0%
LG(-)75-97 97.00% 1.20% 0.50% ≤ 20.0%
LG(-)45-97 97.00% 1.20% 0.50% ≤ 20.0%
LG500-96 96.00% 1.20% 0.50% ≥ 75.0% Refractory materials, electric brush products, and raw materials for batteries and pencils
LG300-96 96.00% 1.20% 0.50% ≥ 75.0%
LG180-96 96.00% 1.20% 0.50% ≥ 75.0%
LG150-96 96.00% 1.20% 0.50% ≥ 75.0%
1G125-96 96.00% 1.20% 0.50% ≥ 75.0%
LG100-96 96.00% 1.20% 0.50% ≥ 75.0%
LG(-)150-96 96.00% 1.20% 0.50% ≤ 20.0%
LG(-)125-96 96.00% 1.20% 0.50% ≤ 20.0%
LG(-)100-96 96.00% 1.20% 0.50% ≤ 20.0%
LG(-)75-96 96.00% 1.20% 0.50% ≤ 20.0%
LG(-)45-96 96.00% 1.20% 0.50% ≤ 20.0%
LG500-95 95.00% 1.20% 0.50% ≥ 75.0% Electric brush products
LG300-95 95.00% 1.20% 0.50% ≥ 75.0%
LG180-95 95.00% 1.20% 0.50% ≥ 75.0%
LG150-95 95.00% 1.20% 0.50% ≥ 75.0%
LG125-95 95.00% 1.20% 0.50% ≥ 75.0%
LG100-95 95.00% 1.20% 0.50% ≥ 75.0%
LG(-)150-95 95.00% 1.20% 0.50% ≤ 20.0% Refractory materials, electric brush products, and raw materials for batteries and pencils
LG(-)125-95 95.00% 1.20% 0.50% ≤ 20.0%
LG(-)100-95 95.00% 1.20% 0.50% ≤ 20.0%
LG(-)75-95 95.00% 1.20% 0.50% ≤ 20.0%
LG(-)45-95 95.00% 1.20% 0.50% ≤ 20.0%
LG500-94 94.00% 1.20% 0.50% ≥ 75.0% Electric brush products
LG300-94 94.00% 1.20% 0.50% ≥ 75.0%
LG180-94 94.00% 1.20% 0.50% ≥ 75.0%
LG150-94 94.00% 1.20% 0.50% ≥ 75.0%
LG125-94 94.00% 1.20% 0.50% ≥ 75.0%
LG100-94 94.00% 1.20% 0.50% ≥ 75.0%
LG(-)150-94 94.00% 1.20% 0.50% ≤ 20.0%
LG(-)125-94 94.00% 1.20% 0.50% ≤ 20.0%
LG(-)100-94 94.00% 1.20% 0.50% ≤ 20.0%
LG(-)75-94 94.00% 1.20% 0.50% ≤ 20.0%
LG(-)45-94 94.00% 1.20% 0.50% ≤ 20.0%
Notes:
  • Product model is composed of its classification code, fineness (μm) and fixed carbon content.
  • The symbol (-) indicates that the screen underflow is less than or equal to 20.0% after sieving on a test sieve with a sieve diameter of 150 μm.
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.
Table 3: Key Indicators & Uses of Medium Carbon Graphite
Model Fixed Carbon Content Volatile Moisture Weight of Screen Residue Main Uses
LZ500-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≥ 75.0% Crucibles, refractory materials and dyes
LZ300-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ180-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ150-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ125-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ100-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ(-)150-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)125-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)100-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)75-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)45-93 ≥ 93.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ500-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ300-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ180-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ150-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ125-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ100-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ(-)150-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)125-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)100-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)75-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)45-92 ≥ 92.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ500-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ300-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ180-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ150-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ125-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ100-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≥ 75.0%
LZ(-)150-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)125-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)100-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)75-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ(-)45-91 ≥ 91.00% ≤ 1.50% ≤ 0.50% ≤ 20.0%
LZ500-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≥ 75.0% Crucibles and refractory materials
LZ300-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ180-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ150-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ125-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ100-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ(-)150-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≤ 20.0% Raw materials for batteries and pencils
LZ(-)125-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)100-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)75-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)45-90 ≥ 90.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ500-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≥ 75.0% Crucibles and refractory materials
LZ300-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ180-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ150-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ125-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ100-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ(-)150-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≤ 20.0% Raw materials for batteries and pencils
LZ(-)125-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)100-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)75-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)45-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)38-89 ≥ 89.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ500-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≥ 75.0% Crucibles and refractory materials
LZ300-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ180-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ150-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ125-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ100-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≥ 75.0%
LZ(-)150-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≤ 20.0% Raw materials for batteries and pencils
LZ(-)125-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)100-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)75-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)45-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ(-)38-88 ≥ 88.00% ≤ 2.00% ≤ 0.50% ≤ 20.0%
LZ500-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≥ 75.0% Crucibles and refractory materials
LZ300-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ180-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ150-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ125-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ100-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ(-)150-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≤ 20.0% Raw materials for batteries and pencils
LZ(-)125-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)100-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)75-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)45-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)38-87 ≥ 87.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ300-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≥ 75.0% Refractory materials
LZ180-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ150-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ125-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ100-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ(-)150-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≤ 20.0% Casting materials
LZ(-)125-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)100-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)75-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)45-86 ≥ 86.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ500-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≥ 75.0% Crucibles and refractory materials
LZ300-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ180-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ150-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ125-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ100-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≥ 75.0%
LZ(-)150-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≤ 20.0% Casting materials
LZ(-)125-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)100-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)75-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ(-)45-85 ≥ 85.00% ≤ 2.50% ≤ 0.50% ≤ 20.0%
LZ500-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≥ 75.0% Refractory materials
LZ300-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ180-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ150-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ125-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ100-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ(-)150-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≤ 20.0% Casting materials
LZ(-)125-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
LZ(-)100-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
LZ(-)75-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
LZ(-)45-83 ≥ 83.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
LZ500-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≥ 75.0% Refractory materials
LZ300-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ180-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ150-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ125-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ100-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≥ 75.0%
LZ(-)150-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≤ 20.0% Casting materials
LZ(-)125-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
LZ(-)100-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
LZ(-)75-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
LZ(-)45-80 ≥ 80.00% ≤ 3.00% ≤ 1.00% ≤ 20.0%
Notes:
  • Product model is composed of its classification code, fineness (μm) and fixed carbon content.
  • The symbol (-) indicates that the screen underflow is less than or equal to 20.0% after sieving on a test sieve with a sieve diameter of 150 μm.
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.
Table 4: Key Indicators & Uses of Low Carbon Graphite
Model Fixed Carbon Content Moisture Weight of Screen Residue Main Uses
LD(-)150-75 ≥ 75.0% ≤ 1.00% ≤ 20.0% Casting materials
LD(-)75-75 ≥ 75.0% ≤ 1.00% ≤ 20.0%
LD(-)150-70 ≥ 70.0% ≤ 1.00% ≤ 20.0%
LD(-)75-70 ≥ 70.0% ≤ 1.00% ≤ 20.0%
LD(-)150-65 ≥ 65.0% ≤ 1.00% ≤ 20.0%
LD(-)75-65 ≥ 65.0% ≤ 1.00% ≤ 20.0%
LD(-)150-60 ≥ 60.0% ≤ 1.00% ≤ 20.0%
LD(-)75-60 ≥ 60.0% ≤ 1.00% ≤ 20.0%
LD(-)150-55 ≥ 55.0% ≤ 1.00% ≤ 20.0%
LD(-)75-55 ≥ 55.0% ≤ 1.00% ≤ 20.0%
LD(-)150-50 ≥ 50.0% ≤ 1.00% ≤ 20.0%
LD(-)75-50 ≥ 50.0% ≤ 1.00% ≤ 20.0%
Notes:
  • Product model is composed of its classification code, fineness (μm) and fixed carbon content.
  • The symbol (-) indicates that the screen underflow is less than or equal to 20.0% after sieving on a test sieve with a sieve diameter of 150 μm.
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.
Category
  • Expandable Graphite
  • Micro Powder Graphite
  • Graphite Emulsion
Expandable Graphite

Expandable graphite, also known as graphite acid, acidized graphite or graphite oxide, is a graphite interlayer compound prepared by using chemical oxidation (chemical method), electrochemical method, microwave method, explosion method and gas phase volatilization method for natural flake graphite treatment. After special treatment, expandable graphite can be instantly expanded into worm-like shape under high temperature.

Different types of insert lead to different intercalation structures, giving it unique physical and chemical properties such as high electrical and thermal conductivity, superconductivity, magnetic permeability, battery performance, catalytic properties, and expansion performance. The application of expandable graphite covers the practical use in high-conductivity materials, battery materials, efficient catalysts, hydrogen storage materials, and improvements in expansible graphite sealing materials.

According to the sulphur content after expansion, expandable graphite is divided into sulfurous expandable graphite (≥ 0.120%) and low sulfur expandable graphite (< 0.120%). The specific properties of expandable graphite is shown in the table below.

Expandable graphite and worm-like graphite after expansion are placed together.
Table 5: Expandable Graphite Technical Indicators
Category Before Expansion After Expansion
Moisture pH Value Weight of Screen Residue (150 μm, 180 μm, 300 μm) Expansion Volume (mL/g) Sulfur Content Fixed Carbon Content
Sulfurous expansible graphite < 1.00% 3.00–9.00 ≤ 20.00% 50–400 ≥ 0.120% 90% – 99%
Low sulfur expandable graphite < 0.120%
Notes:
  • These properties are typical values and not guaranteed.
Micro Powder Graphite

Micro powder graphite inherits the good properties of natural flake graphite and has special oxidation resistance, self-lubricity and plasticity under high temperatures. Besides, it also has good electrical conductivity, thermal conductivity and adhesion. It is widely used as a release lubricant in the production of catalyst for the fertilizer industry, a high-temperature lubricant base, a corrosion-resistant lubricant base, powder metallurgy release lubricant and metal alloy raw material, carbon film resistance making, conductive dry film and preparation of conductive liquid, plastic, rubber and various composite fillers or performance improvement agent to enhance the wear resistance, electrical resistance or conductivity of materials.

The technical indicator of micro powder graphite is shown in table below.

A pile of micro powder graphite is placed on a piece of paper.
Table 6: Micro Powder Graphite Technical Indicators
Model Fixed Carbon Content Ash Content Moisture Particle Size Testing Equipment
WFS-001 90%–99.9% 0.1%–10% 0.2% 1 μm, ≥ 60% Laser particle size distribution instrument
WFS-002 2 μm, ≥ 60%
WFS-003 3 μm, ≥ 60%
WS-006 6 μm, ≥ 60%
WS-010 90%–99.9% 0.1%–10% 0.1%–0.5% 10 μm, ≥ 60% Laser particle size distribution instrument
WS-013 13 μm, ≥ 80%
WS-018 18 μm, ≥ 80%
WS-028 28 μm, ≥ 80%
WS-043a 90%–99.9% 0.1%–10% 0.1%–0.5% 43 μm, ≥ 85% Water sieve
WS-043b 43 μm, ≥ 85%
WS-043c 43 μm, ≥ 85%
WS-074 74 μm, ≥ 85%
Notes:
  • Product model is composed of its classification code and oversize particle size after sieving.
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.
Graphite Emulsion

Graphite emulsion is a emulsion that is mainly composed of micro powder graphite. It features high temperature lubricity, adhesion, easy demolding, stable chemical properties, non-corrosive, non-toxic, enhanced molding quality, significantly extended the service life of the die, etc. Strictly speaking, it should be called as graphite colloid and is divided into forging graphite emulsion, solvent-based graphite emulsion, and water-based graphite emulsion.

Of which, forging graphite emulsion is made from high purity, ultra-fine, natural flake graphite powder obtained by taking high carbon graphite as the raw material and then going through ultra-fine grinding. It is a highly dispersed colloidal graphite emulsion made by taking water as a carrier and then adding appropriate amount of chemical additives such as suspension dispersant, emulsifier, stabilizer, and colloid protectants. This emulsion is an ideal high-temperature release agent for ferrous and non-ferrous black hot working and is widely used in forging and metal forming industries.

Graphite emulsion is poured into a barrel.
Table 7: Graphite Emulsion Technical Indicators
Model Solid Content Graphite Content Subsidence after 3 Hours Due to 20 Times of Dilution Application Examples
GE-2820 > 28% > 20% 35% Die forging, gear rough, finish forge and roll forging
GE-3025 > 30% > 25% Free of dilution Steel casting spout slide lubrication
GE-3525 > 35% > 25% Free of dilution Purified silicon smelting
GE-4025 > 40% > 25% 40% Light alloy extruding
GE-3023 > 30% > 23% 35% Die forging for heavy-duty press
GE-3526 > 35% > 26% Free of dilution Hot extruding for warheads and shell cases
GE-3023 > 30% > 23% 35% Hammer forging
Notes:
  • Product model is composed of its classification code, solid content and graphite content.
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.