Properties |
Unit |
Basalt fiber |
Glass fiber |
Silica fiber |
Color |
----- |
Brown |
transparent White |
White |
Max application temp. |
C |
982 |
650 |
1100 |
Sustained operation temp. |
C |
820 |
480 |
1000 |
Min operation temp. |
C |
-260 |
-60 |
-170 |
Thermal conductivity |
W/m K |
0.031 ~ 0.038 |
0.034 ~ 0.04 |
0.035 ~ 0.04 |
Melting temp. |
C |
1450 |
1120 |
1550 |
Vitrification temp. |
C |
1050 |
600 |
1300 ~ 1670 |
Glow loss |
% |
1.91 |
0.32 |
1.75 |
Thermal expansion coeff. |
ppm/C |
8.0 |
5.4 |
0.05 |
Density |
g/cm3 |
2.75 |
2.6 |
2.15 |
Filament diameter |
microns |
9 ~ 23 |
9 ~ 13 |
9 ~ 15 |
Tensile strength |
Mpa |
4840 |
3450 |
4750 |
Compression |
KSI |
550 |
440 |
510 |
Elastic Modulus |
Gpa |
89 |
77 |
66 |
Linear expansion coeff. |
x 10 /K |
5.5 |
5 |
0.5 |
Elongation at break |
% |
3.15 |
4.7 |
1.2 |
Absorption of humidty |
% |
< 0.1 |
< 0.1 |
< 0.1 |
Stability at tension |
20C,% |
100 |
100 |
100 |
Sound absorption coeff. |
% |
0.9 ~ 0.99 |
0.8 ~ 0.93 |
0.85 ~ 0.95 |
Specific volume rsist. |
ohm.m |
1E12 |
1E11 |
1E11 |
Loss angle frequency |
1 MHz |
0.005 |
0.0047 |
0.0049 |
Relative dielectric permeability |
1 MHz |
2.2 |
2.3 |
2.3 |
% weight loss after 3 hours boiling in |
H2O |
0.2 |
0.7 |
0.05 |