CONDUCTIVITY.

INTELLIGENCEIN

GRAPHITE

www.gk-graphite.com

POWERFULLY CONNECTED.CONDUCTIVITY ADDITIVE

Synthetic graphite is a versatile material with a unique structure and many different properties. Therefore, it is not only an essential component in applications such as pencils and refractory products, but it is also a high-performance raw material for the plastics industry.

Being a natural crystalline graphite grade, “Cond” exceeds the conventional graphite properties in terms of electrical conductivity about 10 times. Nevertheless, the Cond grades possess other typical quality characteristics of natural graphite like lubrication, thermal conductivity and chemical stability.

WHY IS GRAPHITE CONDUCTIVE?

Graphite can conduct electricity due to the vast electron delocalization within the carbon layers - a phenomenon called aromaticity. These valence electrons are free to move, so are able to conduct electricity. The electricity is conducted within the plane of the layers.

POOR CONDUCTIVITY GOOD CONDUCTIVITY

-

-

+

+

High carbon content

Finer graphite is preferred

Particle morphology in focus

High specifi c surface area

PARAMETERS FOR IMPROVED ELECTRICAL CONDUCTIVITY

Carbon brushes

FIELDS OF APPLICATION

Masterbatch / Compounds

Shielding (e.g. electromagnetic

radiation)

Conductivity additive for anodes of

lithium ion batteries

Bi-polar plates for fuel cells

Solar cells

ELECTRICAL RESISTANCE IN SILICONES

At a filling degree of 20 % the electrical resistance clearly starts

to declines with Cond, whereas the finely milled graphite does not function as an electrical conductor

at a filling degree of 30 %.

X-RAY COND 8 96

The considerably improved electrical conductivity of the Cond grades

compared to finely milled natural graphite is shown in the diagram:

1,0E+00

1,0E+01

1,0E+02

1,0E+03

1,0E+04

1,0E+05

1,0E+06

1,0E+07

1,0E+08

1,0E+09

1,0E+10

1,0E+11

10 15 20 25 30 35

RE

SIST

IVIT

Y [Ω

*CM

]

FILLING DEGREE [%]

Cond 20/96 FP 99,5-L

RES

ISTA

NCE

[Ω*C

M]

FILLING DEGREE [%]

Graphit Kropfmühl GmbH Langheinrichstr. 1 94051 Hauzenberg GERMANY T: +49(0)8586 609-0 | F: -112 info@gk-graphite.com www.gk-graphite.com

CONDUCTIVITY

OUR PRODUCT PORTFOLIO

GRAPHITE GRADE CARBON CONTENT [%] MIN - MAX PARTICLE SIZE [µm] - TYPICAL VALUES

d50 d90

Cond 5 96 - 99,9 5,5 - 7,0 ≤ 13

Cond 8 96 - 99,9 7,0 - 9,0 ≤ 17

Cond 20 96 - 99,9 16 - 21 ≤ 50

If you have special requirements, Graphit Kropfmühl offers tailor-made solutions in line with customer needs. Please don‘t hesitate to contact us. Graphit Kropfmühl stands for:

Customised solutions Quality assurance

Long-standing experience

Focused R&D work

We deliver graphite tailored to your demands and in different types of packaging. Quality is controlled according to a detailed quality control plan. The typical forms of packaging are paper bags, shrink wrapped on euro-pallets and big bags. Other types of packaging and transport can be arranged on request.

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