Semi Materials Co., Ltd.

Graphite for electron beam evaporation(EBE)

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Semi Materials Co., Ltd.
[Korea]

Address
Lojit venture bldg 4F, 22-2 Sunae-Dong, Bundang-Gu,  Sungnam-City Gyeonggi-do
Phone
82-31-7118978
Contact name
Mike. Jung

Description

Crucible liners in electron beam evaporation equipment need to be made of high density graphite materials with a low open pore volume and high reaction inertia.

Grade recommendation
Further grades on request.

Physical properties of purity graphite (averages)

Physical Properties
R6650
Density (g/cm3)
1.85
Porosity(open) (%)
10
Hardness Rockwell B (HR)
90
5/100
E-Modulus(N/mm2)
13500
Flexural Strength (N/mm2)
65
Compressive Strength (N/mm2)
150
Specific Electrical Resistance(mWm)
14
Thermal Expansion
(20~1000°C ; x10-6K-1)
5.0
Thermal Conductivity (W/mK)
90
Pressing Method
Isostatic Molded
WG : with grain.
AG : against grain.
If not stated otherwise, all values are measured with a test piece the axis of which is cut with grain.

Typical analysis
Element Concentration
-
code
Ash
Value
Al
B
Ca
Co
Cr
Cu
Fe
K
Mg
Mn
Na
Ni
P
S
Si
Ti
V
High purity
P
20ppm
<0.1
1
1
<0.1
<0.1
0.2
0.5
<1
0.15
<0.1
<1
<0.1
<0.3
<2
<2
0.5
0.2
Super
pure
S
5ppm
<0.1
0.05
0.3
<0.1
<0.1
0.1
0.3
<1
0.05
<0.1
<1
<0.1
<0.3
<2
0.5
0.3
0.1


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