Products

Artificial graphite sheet

Artificial graphite sheet

DASEN is a professional graphite sheet manufacturer with capacity of 300,000SQM/month and 10,000 square meters dust-free workshop.

Thermal graphite sheet can be divided into natural graphite sheet and synthetic graphite sheet. As the horizontal heat conduction materials, both have high thermal conductivity, lightweight, flexible and easy to be cut. So we can offer die cut graphite sheet, graphite tape and composite graphite sheet with adhesive on both sides.

Difference between the two kinds of pyrolytic graphite sheets:

1. The natural graphite sheet, also called graphite paper, under the microscope is much rougher than the synthetic graphite sheet. While the synthetic graphite sheet, also known as artificial graphite foil has fewer impurities and higher density than the natural graphite paper.

2. As pyrolytic graphite material, the thermal conductivity of synthetic graphite sheet is 700~1900W/m-K, while that of natural graphite paper is only 150~600W/m-K.

3. Artificial graphite sheet is more complex and expensive than natural flexible graphite sheet, because artificial graphite sheet is produced during high temperature sintering process. The price and effect of natural graphite paper can be accepted and convinced by industry users, so natural graphite sheet has been widely used in various industries like Petrochemical, Refining and Power Generation industries.

Product Description

Features of synthetic graphite sheet:

  • Excellent thermal conductivity : up to 1950 W/m•K (2 to 5 times as high as copper, 3 to 8 time as high as aluminum)
  • Lightweight: Specific gravity : 1.9 to 2.1 g/cm3
  • Flexible and easy to be cut. (withstands repeated bending)
  • Low thermal resistance
  • 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 of synthetic graphite sheet:


Thermal interface materials are designed for use in applications requiring reliable performance, low contact resistance, long life, low maintenance and high thermal conductivity. The flexible graphite materials are die-cut to ensure exact fit and reduce module-to-module variation during assembly. The compressibility of the material improves surface contact, reducing thermal impedance and can compensate up to 125μ of flatness variation between the contact surfaces while the high in-plane thermal conductivity reduces hot spots. With the rise of new energy vehicles, graphene sheet is widely used in aluminum ion battery.

 

Item No. DSN5017 DSN5025 DSN5032 DSN5040 DSN5050
Thickness tolerance 0.017±0.003mm 0.025±0.003mm 0.032±0.004mm  0.04±0.005mm 0.05±0.005mm
Thermal  
conductivity
X-Y axis (w/m.k) 1700~1900 1700~1850 1550~1750 1450~1650 1400~1600
Z axis
 (w/m.k)
10~15 12~18 12~18 13~19 15~22
In-plane Thermal Diffusivity(mm²/s) 920~1040 930~1010 890~1010 880~1000 850~970
Density (g/cm³) 2.10±0.1 2.10±0.10 2.00±0.1 1.90±0.1 1.90±0.1
Heat capacity (J/g/K) 0.87±0.01 0.87±0.01 0.87±0.01 0.87±0.01 0.87±0.01
Operation temperature (℃) -40~400 -40~400 -40~400 -40~400 -40~400
Bending (angle180, R5) 50000 50000 50000 50000 50000
Remark:
Above Thermal conductivity was tested by third-party testing organization (Netzsch, Germany)
according to the laser scattering.
Heat-resistance temperature is the graphite sheet excluding PET film.



Item No. DSN5060 DSN5070 DSN5080 DSN5090 DSN5100 
Thickness 0.06±0.006mm 0.07±0.007mm 0.08±0.008mm 0.09±0.009mm 0.1±0.01mm
Thermal  
conductivity
X-Y axis (w/m.k) 1350~1550 1200~1400 1200~1400 1100~1300 1000~1200
Z axis
 (w/m.k)
15~22 15~22 15~22 15~22 15~22
In-plane Thermal Diffusivity(mm²/s) 840~960 830~970 810~950 790~930 770~920
Density (g/cm³) 1.85±0.1 1.70±0.1 1.70±0.1 1.60±0.1 1.50±0.1
Heat capacity (J/g/K ) 0.87±0.01 0.85±0.01 0.87±0.01 0.87±0.01 0.87±0.01
Operation temperature (℃) -40~400 -40~400 -40~400 -40~400 -40~400
Bending (angle180, R5) 50000 50000 50000 50000 50000
Remark:
Above Thermal conductivity test by third-party testing organization (Netzsch, Germany)
according to the laser scattering.
Heat-resistance temperature is bare graphite sheet only excluding PET film.