Properties & Composition & Characteristics of glass fiber
Properties of glass fiber
Properties | E-Glass | T-Glass | |
---|---|---|---|
Physical properties | Count*1(g/cm³) |
2.6 | 2.5 |
Tensile strength(GPa) |
3.2 | 4.8 | |
Tensile modulus(GPa) |
75 | 86 | |
Elongation(%) |
4.8 | 6.1 | |
Thermal properties*1 | Specific heat(J/kg・K) |
763 | 774 |
Thermal conductivity(W/m・K) |
1.0 | 1.2 | |
Thermal expansion coefficient |
5.6 | 2.8 | |
Softening point(℃) |
844 | >1000 | |
Electrical properties*1 | Permittivity1GHz |
6.8 | 5.4 |
Dielectric loss tangent1GHz |
0.0035 | 0.0043 | |
Volume resistivity(Ω・cm) |
1015over | 1015over | |
Optical properties*1 | Refraction index |
1.560 | 1.526 |
- *1Measured value of lump glass.
- *Tensile strength is measured with glass fiber called virgin fiber, which has few defects.
A value close to the ideal strength. - *The above data is an example of actual measurement values, not standard values.
Composition and characteristics of glass fiber
component(mass%) | E-Glass | T-Glass | NCR-Glass |
---|---|---|---|
SiO2 | 52~56 | 64~66 | 52~62 |
B2O3 | 5~10 | - | - |
Al2O3 | 12~16 | 24~26 | 12~16 |
CaO | 20~25 | - | 16~30 |
MgO | 9~11 | ||
R2O | 0~0.8 | - | 0~0.8 |
ZnO | - | - | 0.3~6 |
Features | Electrical insulation General purpose |
High strength High elastic modulus |
Acid resistant glass |
The above components are described as the composition formula of oxides as a technical practice in the field of glass, but the oxides that make up the glass are irregularly expressed rather than being mixed as a component of the preparation in the glass. It exists in the form of chemical bonds in the lattice formed by bonding.
Therefore, the CAS number and Class Reference Number in the Gazette List are those of the oxides that are customarily written, and do not indicate the state of each component in the glass.