Pure Silica Fibre
Overview of pure silica
Our ultra-pure silica fibre products (SiO2>99.95%) are made from continuous, homogeneous and non-porous filaments. This material is not only one of the most efficient in terms of high temperature application, but also one of the safest and most ecological on the market. Particularly valued in aeronautics and aerospace in for its exceptional dielectric properties, especially in the construction of radome, it can withstand a continuous temperature of 1050°C without undergoing dimensional changes, even in the event of thermal shock, and has a very low thermal conductivity. It also has good chemical resistance, especially to acids.
Applications of pure silica
- The aerospace and aeronautical industry
- The glass industry
- Insulating industrial furnaces
- Catalytic supports for heating systems
- Replacement of asbestos and ceramic fibres
- Thermal insulation in the manufacture of fibre optics
- Insulation of engines in the aeronautics industry
- Infrared reflector for the thermoforming and lighting industry
- Thermal insulation or catalytic function in the transport industry
- Insulation in the semiconductor industry
- Filtration of hot gases
- Insulation of thermocouples
Technical Specifications of pure silica
|
Property |
Unit |
Value |
|
Density |
g/cm3 |
2.2 |
|
Poisson coefficient |
- |
0.16 |
|
Dielectric constant at 10 GHz |
- |
3.74 |
|
Resistivity at 20˚C |
Ω.m |
1x1020 |
|
Resistivity at 1000˚C |
Ω.m |
1x108 |
|
Linear expansion coefficient |
K-1 |
0.54x10-6 |
|
Continuous temperature |
°C |
1000 |
|
Max. temperature |
°C |
1200 |
|
Specific heat at 20°C |
J.kg-1.K-1 |
7.5x10² |
|
Thermal conductivity at 20˚C |
W.m-1.K-1 |
1.38 |
|
Refractive index |
- |
1.4585 |
|
Dispersion |
- |
67 |
Comparative
|
Property |
Unit |
Pure silica |
E Glass |
Kevlar |
|
Density |
g/cm3 |
2.2 |
2.6 |
1.44 |
|
Poisson coefficient |
- |
0.16 |
0.25 |
0.36 |
|
Rupture force |
MPa |
3600 |
2400 |
3000 |
|
Elongation |
% |
7.7 |
3.5 |
2.4 |
|
Linear expansion coefficient |
K-1 |
0.54x10-6 |
9x10-6 |
-2x10-6 |
|
Continuous temperature |
°C |
1000 |
550 |
300 |
|
Max. temperature |
°C |
1200 |
700 |
450 |
|
Specific heat at 20°C |
J.kg-1.K-1 |
750 |
720 |
1420 |
|
Thermal conductivity at 20˚C |
W.m-1.K-1 |
1.38 |
0.8 |
0.4 |
Overview of high and low density felts
Our ultra pure silica felts contain 99.95% SiO2. Composed of silica fibres assembled with polyvinyl alcohol, they can be used in temperatures of up to 1200°C. Even at a continuous temperature of 1000°C, they do not shrink and retain a very low thermal conductivity and exceptional mechanical properties.
Our felts are particularly popular in the aerospace industry for insulating engines thanks to their outstanding insulating and fireproof characteristics as well as their resistance to vibrations and their very long life. Mainly used between two refractory sheets, we also offer flexible solutions made with coated fabrics. Their outstanding properties are also useful for domestic applications such as catalytic heaters and industrial furnace insulation.
Applications of high and low density felts
- The aerospace industry
- The glass industry
- Insulating industrial furnaces
- Catalytic supports for heating systems
- Replacement of asbestos and ceramic fibres
- Thermal insulation in the manufacture of fibre optics
- Insulation of engines in the aeronautics industry
Technical Specifications of high and low density felts
|
Property |
Unit |
Pure silica felt Low density |
Pure silica felt High density |
|
Number |
|
190-0100 |
190-0110 |
|
Area density |
g/m² |
80 |
200 |
|
Density ( |
kg/m3 |
20 |
130 |
|
Thickness |
mm |
8 |
2 |
|
Width |
mm |
1 000 |
1 000 |
|
Length |
mm |
3 500 |
25 000 |
|
Continuous temperature |
°C |
1 000 |
1 000 |
|
Peak temperature |
°C |
1 200 |
1 200 |
|
Thermal conductivity at 500°C |
W.m-1.K-1 |
0.274 |
0.107 |
Other products
We also offer pure silica fibre in the form of threads, fabrics and loose fibres. Finished products are available on request.
