Products

Thermal graphite

ProductsDASEN is a professional graphite sheet manufacturer with capacity of 300,000SQM/month and 6000 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.

 

Thickness

DSN5012
12um

DSN5017
17um

DSN5025
25um

DSN5032
32um

DSN5040
40um

0.012±0.003mm

0.017±0.003mm

0.025±0.003mm

0.032±0.004mm

0.04±0.005mm

Thermal 
conductivity

X-Y axis (w/m.k)

1700~1900

1700~1900

1700~1850

1500~1700

1300~1500

Z axis
 (w/m.k)

10~15

10~15

12~18

12~18

13~19

In-plane Thermal Diffusivity(mm²/s)

910~1020

920~1030

930~1010

860~980

790~910

Density (g/cm³)

2.15±0.1

2.12±0.1

2.10±0.10

2.00±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.

 

Thickness

DSN5050
50um

DSN5070
70um

DSN5100
100um

DSN5150
150um

DSN5200
200um

0.05±0.005mm

0.07±0.007mm

0.1±0.01mm

0.15±0.015mm

0.2±0.02mm

Thermal 
conductivity

X-Y axis (w/m.k)

1350~1550

1200~1400

800~1000

600~800

500~700

Z axis
 (w/m.k)

15~22

15~22

15~22

15~22

15~22

In-plane Thermal Diffusivity(mm²/s)

840~960

770~890

610~770

630~840

580~810

Density (g/cm³)

1.85±0.1

1.80±0.1

1.50±0.1

1.10±0.1

1.00±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 test by third-party testing organization (Netzsch, Germany)    
according to the laser scattering.
Heat-resistance temperature is bare graphite sheet only excluding PET film.