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Expandable Graphite
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Expandable Graphite

Expandable Graphite
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Product description
Specifications

Expandable Graphite

Product Name

Expandable graphite

HS CODE

3824999940

CAS No.

7782-42-5

Chemical Formula

C

 

Specification:32 mesh, 50 mesh, 80 mesh, 100 mesh

Remarks:Customized carbon amount, multiple, PH value according to specific needs

Product description

Expandable graphite, aka flexible graphite, is made by high-temperature transient processing of our high-quality natural flake graphite. After the processing, its shape changes to wormlike from flake while its volume could be 100~450 times larger. Graphite crystal has hexagonal net plane layered structure consisting of carbon. Carbon atoms on the layer are bonded by strong covalent bond while layers are bonded by weak VDW with a larger distance.Therefore, under the right conditions, multiple chemicals such as acid metal, alkali metal and salt chemicals could insert graphite layers and combine with carbon atoms to form GIC (Graphite Intercalation on Compounds). Heated to appropriate temperature, GIC would decompose instantly and produce a lot of gas, which makes graphite expand along the axis direction and form new wormlike substance, that is expandable graphite.

1. superior flexibility, mouldability, self-lubrication and resistance to pressure.

2. superior resistance to corrosion, radiation, high low temperature.

3. superior resistance to shock.

4. superior conductivity.

5. superior resistance to distortion and anti-ageing.

6. resistance to fusion and permeation of all kinds of metal.

7. no toxic, no cancerogen, no harm to the environment.

Expandable graphite sheet is different from other swelling agent. Graphite would start expanding when heated to a certain temperature which is called initial expansion temperature, then expand completely at 1000℃ and reach its maxim volume. Its volume could be more than 200 times larger than the original. Graphite after the expansion are called expandable graphite or graphite worms, changing from flake to low-density wormlike and forming an excellent thermal insulation blanket. Expandable graphite is not only the carbon source in the expansion system, but also an effective heat insulating layer which has the characteristics of low heat release rate, small mass loss and less smoke in the fire.

Corresponding parameter set not found, please add it in property template of background

Physical and Chemical Indexes for Expandable Graphite

F.C.≥
(%)

Ash
(%)

V.M.
(%)

expanded multiplication
rate(ml/g)

S
(%)

PH

MOISTURE
(%)

SIZE

SCREEN RESIDUE
(%)

90-99.9

8

12

200-400

2.2

3-7

0.5

32

≥80

90-99.9

8

12

200-350

2.2

3-7

0.5

50

≥80

90-99.9

8

12

150-250

2.2

3-7

0.5

80

≥80

90-99.9

8

12

100-200

2.2

3-7

0.5

100

≥80

90-99

8

15

30-120

2.2

4-7

0.5

100

≥80

90-99

8

15

15-50

2.2

4-7

0.5

200

≥80

90-99

8

15

10-20

2.2

4-7

0.5

325

≥80

 

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