The raw material of natural graphite film comes from natural graphite ore, which is totally different from synthetic graphite.
Its process is that natural graphite ore is crushed, screened, purified, floated, sintered and calendered, with a carbon content of 99~99.6%.
The thermal conductivity of natural graphite film ranges from 150 W/m-K~500 W/m-K, with 1.0~1.7g/cm3 density.
Because of its low cost, natural graphite film is widely used in heat dissipation, such as notebook,
floor heating, liquid crystal television, ship, power battery, lithium battery, new energy automobile, etc.
Mineral processing of natural graphite sheet:
Feature Of Natural Graphite:
Excellent thermal conductivity: up to 500W/m·K
Lightweight: specific gravity: 0.9 to 1.7 g/cm3
(30% lighter than aluminum, 80% lighter than copper in the same size)
Low thermal resistance, 40% lower than aluminum, 20% lower than copper
Low heat resistance with flexible graphite sheet
Low repulsion and easy to keep the product's shape after attaching
RoHS, REACH compliant
Siloxane Free
Application:
Flexible graphite products function as a passive heat spreader, heat shield and electric conduction.
The graphite sheets offer a variety of in-plane thermal conductivity solutions.
The flexible graphite foils can be die-cut, or laminated with plastics and/or adhesives.
Widely used in new energy industry as conducting material or thermal management material
Widely used in metallurgical industry as refractories
Widely used in the electronics industry as the electrode conductive material
Water-resistant lubricating material
Anticorrosion materials in petroleum metallurgical industry
Used in a centrifugal pump and other equipment: make a pump or a seal
Used in an industrial furnace: make industrial furnace parts
The point solution process is used as an electrolytic plate: quality assurance
Parameters of natural graphite sheet - 1
TYPE | DSN60030 | DSN60050 | DSN60080 | DSN60100 | DSN60130 | DSN60150 |
Carbon Content | ≥99.4% | ≥99.4% | ≥99.4% | ≥99.4% | ≥99.4% | ≥99.4% |
Color | Dark Grey | Dark Grey | Dark Grey | Dark Grey | Dark Grey | Dark Grey |
Thickness (mm) | 0.03 | 0.05 | 0.08 | 0.1 | 0.13 | 0.15 |
Thickness Tolerance (mm) | ±0.005 | ±0.005 | ±0.01 | ±0.02 | ±0.02 | ±0.03 |
Density (g/cm³) | 1.5±0.1 | 1.5±0.1 | 1.5±0.1 | 1.5±0.1 | 1.5±0.1 | 1.5±0.1 |
Hardness (shore A) | 85 | 85 | 85 | 85 | 85 | 85 |
Tensile Strength (MPa) | ≥3 | ≥3 | ≥3 | ≥3 | ≥3 | ≥3 |
Sulfur content (ppm) | ≤1250 | ≤1250 | ≤1250 | ≤1250 | ≤1250 | ≤1250 |
Temperature Range (℃) | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 |
Thermal Conductivity (X-Y axis) | 350-400 W/m.K | 350-400 W/m.K | 350-400 W/m.K | 300-400 W/m.K | 300-400 W/m.K | 250-350 W/m.K |
Heat diffusion coefficient (25℃) ( mm2/s) | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 |
Compressibility | 35~55% | 35~55% | 35~55% | 35~55% | 35~55% | 35~55% |
Volume Resistivity (Ω-cm) | 11*10-4 | 11*10-4 | 11*10-4 | 11*10-4 | 11*10-4 | 11*10-4 |
Parameters of natural graphite sheet - 2
TYPE | DSN60200 | DSN60300 | DSN60500 | DSN60800 | DSN61000 | DSN62000 |
Carbon Content | ≥99.4% | ≥99.4% | ≥99.4% | ≥99.4% | ≥99.4% | ≥99% |
Color | Dark Grey | Dark Grey | Dark Grey | Dark Grey | Dark Grey | Dark Grey |
Thickness (mm) | 0.2 | 0.3 | 0.5 | 0.8 | 1.0 | 2.0 |
Thickness Tolerance (mm) | ±0.03 | ±0.05 | ±0.05 | ±0.08 | ±0.1 | ±0.15 |
Density (g/cm³) | 1.5±0.1 | 1.5±0.1 | 1.5±0.1 | 1.0±0.1 | 1.0±0.1 | 1.0±0.1 |
Hardness (shore A) | 85 | 85 | 85 | 85 | 85 | 85 |
Tensile Strength (MPa) | ≥3 | ≥3 | ≥3 | ≥3 | ≥3 | ≥3 |
Sulfur content (ppm) | ≤1250 | ≤1250 | ≤1250 | ≤1250 | ≤1250 | ≤1250 |
Temperature Range (℃) | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 | -40 ~ 550 |
Thermal Conductivity (X-Y axis) | 250-350 W/m.K | 250-350 W/m.K | 250-350 W/m.K | 200-300 W/m.K | 100-200 W/m.K | 100-200 W/m.K |
Heat diffusion coefficient (25℃) ( mm2/s) | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 | X-Y direction 200~320 |
Compressibility | 35~55% | 35~55% | 35~55% | 35~55% | 35~55% | 35~55% |
Volume Resistivity (Ω-cm) | 11*10-4 | 11*10-4 | 11*10-4 | 11*10-4 | 11*10-4 | 11*10-4 |
