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Silicate Fibre Felts, heat-resistant up to 1,200 °C
Silicate is a mineral made of silicon dioxide (SiO2) and other metallic oxides, such as magnesium, calcium, aluminium, etc. Silicate fibre textiles offer different physical, thermal and mechanical properties depending on their level of silicon dioxide.
Known for their great thermal properties, silicate fibres can withstand higher temperatures than glass fibre or basalt fibre. These inorganic fibres pose no health risk when handling and don’t contain toxic substances. They also offer excellent chemical and mechanical properties, that therefore offer a reliable alternative to ceramic fibre.
Silicate fibre felts are suitable for high-temperature applications thanks to their thermal resistivity. As they can withstand operating temperatures up to 1,100 °C and peak temperatures up to 1,200 °C, they are used in the industry for the assembly of heat protection as well as thermal insulation. Their good properties also make it possible to use silicate fibre felts for soundproofing and electrical insulation.
Final Advanced Materials proposes silicate fibre felts in thicknesses ranging from 3 to 25 mm and without an organic binder. They are available untreated or with a heat cleaned treatment. However, a mechanical bonding of the fibres provides felts that are soft, compact and stable during their processing.
For more information regarding the availability, refer to the technical data sheet.
Main Applications of Silicate Fibre Felts
- Thermal insulation
- Soudproofing
- Electrical insulation
- Component for heat protection's assembly
General Data on Silicate Fibre
Technical Data on Silicate Fibre
Physical variables included in this documentation are provided by way of indication only and do not, under any circumstances, constitute a contractual undertaking. Please contact our technical service if you require any additional information.
FAQs that can help you in this category
Felts made from carbon/graphite fibre are excellent at withstanding high temperatures, and are used up to 3,000°C. These felts are stable up to 2,000°C, but only in an inert, oxygen-free environment. Otherwise, they oxidise above 300°C. Unlike carbon/graphite felts, zirconia felts are resistant to temperatures up to 2,000°C, even in the presence of oxygen in the environment.
Final Advanced Materials' biosoluble fibre felts are a safe alternative to replace asbestos-based insulation or other refractory fibres. These fibres have low biopersistence, meaning the body can eliminate any inhaled fibre rapidly and naturally. These felts have a low thermal conductivity and a temperature resistance of up to 1,400°C, and are used primarily as oven coatings, but also as a customisable local thermal insulation.
The only felts capable of withstanding a continuous exposure to temperatures exceeding 1,500°C are ceramic (Al2O3), zirconia (ZrO2) or graphite fibre-based felts. Each felt has specific constraints: graphite felts can only be used in an inert atmosphere or in a vacuum, while zirconia felts have poor mechanical properties, and ceramic fibre felts can only resist temperatures up to 1,650°C.
The other felt families (glass, silica, biosoluble, RCF, basalt, etc.) cannot withstand a continuous exposure to more than 1,260°C.
The material has a thermal conductivity of 0.06 W/m·K at 200°C, and 0.30 W/m·K at 1,000°C. It is substantially lower than that of conventional refractory materials (often between 1 and 2 W/m·K at these temperatures). The felts offered by Final Advanced Materials are available in several densities, ranging from 64 to 160 kg/m3. The higher the density, the lower the conductivity which can go as low as 0.20 W/m·K at 1,000°C.