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DONGBANG CARBON

FLEXIBLE GRAPHITE

플렉시블 흑연

FLEXIBLE GRAPHITE

제품문의

제품소개

  • 플렉시블 펠트
  • 리지드 펠트
  • 흑연 원사
  • 흑연 호일/시트

플렉시블 펠트

FLEXIBLE FELT

Flexible graphite felt

is manufactured by the graphitization of carbon.felt.

  • This process makes for smaller specific surface areas and greatly reduced pump-down times under high vacuum.
    The very low ash content is indispensable for high-purity materials production plants and ensures high oxidation resistance of graphite felts

Typical properties

SIGRATHERM type

GFA 5

GFA 10

 Weight per unit area
 Tensile strength      longit.
                              transv.  
 Elongation at tear    longit.
                             transv. 
 Resistivety             longit.
                             transv.
 Thermal
 conductivity(1400℃)
 Specific
 surface area(BET)
 Ash content
 Sulphur content

g/m2
N/mm2
N/mm2
%
%
Ωmm
Ωmm
m
W/m·K
m
m2/g
%
%

470-600
0.1
0.06
5
20
1.5-2.5
3-4
m
0.43
m
<1.0
<0.05
<0.001

950-1100
0.12
0.06
3
15
1.5-2.5
3-4
m
0.43
m
<1.0
<0.05
<0.001

Sizes available

Length
Width
Thickness

m
m
mm

25-30
1.2
5.0-6.0

25-30
1.2
9.0-10.0

Inquiries concerning special dimensions are invited

Application

The application examples given are based on our present state of knowledge SIGRATHERM's unique textile, chemical and thermal properties, however, allow other problems to be solved as well. For this reason, close cooperation with users and processing companies is very important.

Thermal insulation

  • For resistance-or induction-heated vacuum fornaces and inert gas furnaces,
    such as degassing furnaces, brazing furnaces, soft and bright annealing furnaces,
    sintering furnaces for hard metals, carburizing furnaces, laboratory graphitizing furnaces.
  • For inductively heated melting and holding furnaces, in which a proportion of the ceramic
    insulating material is replaced by SIGRATHERM in order to increase the electrical efficiency
    and prevent the liquid metal fron coming into contact with the induction coil in the event of crucible fracture(no wetting).
  • For nucleat reactor technology(small cross-sectional area for neutron absorption).

Porous electrodes

  • For accumulators and fuel cells

Catalyst support

  • Simplified recovery of the catalyst by heat treatment

Backing strips for soldeting and welding

  • No wetting, no smouldering

Adsorption agent

  • Adsorption agent after activation. Surface area increase up to 700m2/g.

Corrosion--resistant vessel linings

  • Used together with corrosion-resistant resins

Filters

  • For hot and/or corrosive gases and liquids.
    For molten metals(no vetting)

리지드 펠트

RIGID FELT

RIGID FELT

Rigid Felt refers to an insulating material made of graphite fiber and carbon, and its necessity is increasing in industrial furnaces under the recent rapid technological development of the electronic industry. In high-temperature furnaces such as industrial heat treatment furnaces, ceramic sintering furnaces, and cemented carbide sintering furnaces, high-quality insulation materials are required. Graphite Felt is a material for high-purity products and is an indispensable product where resistance from high temperatures is required.

Usage

  • Carbon, ceramic, cemented carbide sintering furnace
  • A furnace for growing crystals such as silicon
  • Various vacuum deposition furnaces
  • With HIP (Hot isostatic press) of cemented carbide
  • Insulation in vacuum heat treatment furnace or inert gas furnace

Features

  • It is suitable for places where high purity is required due to the low content of microelements
  • Excellent high temperature oxidation resistance.
  • Excellent insulation.
  • General mechanical processing such as hole and cutting is easy.
  • Foil-coated products improve resistance from corrosion, reflection, radiant heat and convection.

사양

단열특성

기타특성

 

0.13g/cm 2 품목

0.16g/cm 2 품목

휨강도

0.63MPa

0.99MPa

압축강도

1.53MPa

1.69MPa

인장강도

0.04MPa

0.06MPa

열팽창계수

3.60 x 10 --6 /℃

4.48 x 10 --6 /℃

수 분

0.007% 이하

흑연 원사

GRAPHITE YARN

단열재의 조립용으로 많이 사용 되고 있으며 전기적 성질을 가지고 있어 히터로도 사용되고 있습니다.

줄수 표준중량 길이
2가닥 0.8g/m 100 M

흑연 호일/시트

GRAPHITE FOIL & SHEET

GRAPHITE FOIL & SHEET

Properties

  • Flexible, soft
  • Very good resistance to thermal shock
  • Low coefficient of friction
  • Impermeable to gases and liquids
  • Can be used from cryogenic temperatures up to more than 550℃ depending on installation and operating conditions
     - in an inert atmosphere up to approx. 3000℃
     - in steam up to approx. 550℃
     - for applications of more than approx. 400℃, users should request our advice
  • Resistant to most media, is not wetted by molten metals or salts
  • Asbestos-free, presents no health hazard No ageing or embrittlement, because of absence of binders and fillers
  • Can be supplied with high purity
  • Long-term stability of compressibility and recovery over a wide temperature range No measurable cold or warm flow up to maximum permissible gasket stress
  • Properties highly anisotropic particularly in respect fo electrical and thermal conductivity
  • Easily machined by cutting or punching
  • Excellent stability under high compressive stress
  • Can be bonded using commercial adhesives

Packing

  • The foils are wound onto card board cores. Stable flanges with handles ensure that the wound foil does not come into contact with the floor and is easy to handle. Rolls of this type are supplied in rigid card board boxes.

Foil width : 500mm
Core diameter : 4"
Box dimensions in mm
W x H x L : 240 x 240 x 620
W x H x L : 300 x 300 x 620

Foil width : 1000mm
Core diameter : 4"
Box dimensions in mm
W x H x L : 240 x 240 x 1060
W x H x L : 300 x 300 x 1060

Material Data

Type of material

 

F...10Z

F...10C

Bulk density

g/cm3

1.0

Ash content(DIN 51093)

%

≤ 0.15

≤ 2.0

Chloride content

ppm

≤ 20

≤ 50

Thermal conductivity* at 20℃
parallel to surface
perpendicular to surface


W/mK
W/mK


1.55
 4.8

Resistivity* at 20℃
parallel to surface
perpendicular to surface 


Ω㎛
Ω㎛ 


9
650

Specific heat(20℃)

kJ/kgK

0.7

coefficient of emission at  20℃
300℃
1000℃
1500℃

 

0.5
0.38
0.58
0.65

Coefficient of thermal expansion(20-1000℃)
parallel to surface
perpendicular to surface 


10-6/K
10-6/K

approx. 1
approx. 30

permeability coefficient for air perpendicular to surface

cm2/s 

< 2·10-5

< 5·10-5

shore hardness(D)

 

30

Tensile strength
Elongation at break

N/mm2
%

≥ 4
≥ 1

Max. permissible compressive stress
Specimen : 20x20mm x thickness
0.35mm
0.50mm
1.00mm



N/mm2
N/mm2
N/mm2 



220
200
140

Stability under compressive stress
(DIN 52913), 16h, 300℃,
initial stress 50N/mm2

N/mm2

≥ 48

Coefficient of friction
afainst steel, peak-to-calley height

at 20℃ in air
≤10㎛ 

0.08-0.10

SIGRAFLEX SHEETS, REINFORCED

FORMS SUPPLIED