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Comparative Technical CHaracteristics
COMPARATIVE TECHNICAL CHARACTERISTICS OF FILAMENT
MADE FROM E-GLASS, BASALT AND SILICA
Properties
SI Units
Basalt Filaments
Fiberglass
Silica Filament
Thermal
Maximum application temperature
(
°
C)
982
°
650
°
1100
°
Sustained operating temperature
(
°
C)
820
°
480
°
1000
°
Minimum operating temperature
(
°
C)
-260
°
-60
-170
°
Thermal conductivity
(W/m K)
0.031-0.038
0.034-0.04
0.035-0.04
Melting temperature
(
°
C)
1450
°
1120
°
1550
°
Virtification conductivity
(
°
C)
1050
°
600
°
1300
°-1670
°
Glow loss
(%)
1.91
0.32
1.75
Thermal expansion coefficient
(ppm/
°
C)
8.0
°
5.4
°
0.05
°
Physical/Mechanical
Density
(g/cm3)
2.75
2.6
2.15
Filament diameter
(microns)
9-23
9-13
9-15
Tensile strength
(M Pa)
4840
3450
4750
Compression
(psi)
550,000
440,000
510,000
Elastic modulus
(G Pa)
89
77
66
Linear expansion coefficient
(x10 /K)
5.5
5
0.5
Elongation at break
(%)
3.15
4.7
1.2
Absorbtion of humidity (65%RAH)
(%)
<0.1
<0.1
<0.1
Stability at tension (20 C°)
(%)
100
100
100
Stability at tension (200 C°)
(%)
95
92
94
Stability at tension (400 C°)
(%)
82
52
80
Acoustics:
Sound absorbtion coefficient
(%)
0.9-0.99
0.8-0.93
0.85-0.95
Electrical:
Specific volume resistance
(ohm.m)
1*10x12
1*10x11
1*10x11
Loss angle tangent frequency
(1 MHz)
0.005
0.0047
0.0049
Relative dielectric permiability
(1 MHz)
2.2
2.3
2.3
Chemical Resistance
% weight loss after 3 hrs boiling in:
H2O
(%)
0.2
0.7
0.05
2n NaOH (Sodium Hydroxide)
(%)
5.0
6.0
5.0
2n HCI (Hydrochloric acid)
(%)
2.2
38.9
15.7
Price Comparison
$
$
$$$$
Thermal Shrinkage
Thermal Aging (ISO 4606)
Sample