Alumina Silica Fibre Technical Information
Alumina silica fibre is produced in four grades:
-
G2 Type – Alumina / Silica ratio 60% / 40%
- G2 type has excellent flexibility and softness due to containing 40% of silica.
- G2 type can continuously resist temperatures up to 1200°C in optimum conditions.
-
F2 Type – Alumina / Silica ratio 72% / 28%
- F2 type is the most common type of yarn. Most of our products are made by using alumina silica F2 yarn.
- F2 type of yarn can continuously resist temperatures up to 1250°C in optimum conditions.
-
E3 Type – Alumina / Silica ratio 80% / 20%
- E3 type can continuously resist the temperatures up to 1300°C in optimum conditions.
-
FB3 Type – Alumina / Silica / Boron ratio 70% / 28% / 2%
- FB3 type has the best thermal resistance and hardness among all type of alumina silica.
- FB3 contains 2% boron.
- FB3 type can continuously resist the temperatures up to 1395°C in optimum conditions.
Alumina silica fibre has the following key characteristics for thermal applications:
- Excellent thermal resistance.
- Great flexibility.
- Superior thermal insulation properties.
- High tensile strength and modulus.
- Superior electrical insulation properties.
- Corrosion resistant.
- Does not absorb moisture
| BASIC COMPOSITION OF ALUMINA SILICA FIBRE | G2 | F2 | E3 | FB3 |
|---|---|---|---|---|
| Al2O3 | 60% | 72% | 80% | 70% |
| SiO2 | 40% | 28% | 20% | 28% |
| B2O3 | 2% |
| GENERAL PROPERTIES OF ALUMINA SILICA FIBRE | G2 | F2 | E3 | FB3 |
|---|---|---|---|---|
| Colour | White | White | White | White |
| Max Continuous Temperature | 1200°C | 1250°C | 1300°C | 1395°C |
| Melting Point | > 1800°C | > 1850°C | > 1900°C | > 1850°C |
| Diameter Filaments | 7 micron | 7 micron | 10 micron | 10 micron |
| Density | 2.8 g/cm³ | 2.9 g/cm³ | 3 g/cm³ | 3 g/cm³ |
| Tensile Strength | 1900 MPa | 1800 MPa | 1700 MPa | 1750 MPa |
| Tensile Modulus | 180 GPa | 190 GPa | 200 GPa | 190 GPa |
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