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Pure Silica Fibre Felts, up to 1,200 °C
All our pure silica fibre products have a proportion of silica greater than 99.95 %. They are made of continuous, homogeneous and non-porous fibres. Silica is not only one the most effective high-temperature materials but is also among the most reliable and ecological on the market.
Pure silica fibre felts are composed of silica fibre combined with polyvinyl alcohol. They can be used at temperatures up to 1,200 °C. There is no shrinkage even with operating temperatures up to 1,000 °C and they maintain very low thermal conductivity as well as excellent mechanical properties.
These felts are particularly appreciated in the aerospace industry for the insulation of engines thanks to their outstanding insulating and fireproof properties as well as their resistance to vibrations and their very long life. Their outstanding properties are also useful for domestic applications such as catalytic heaters and industrial furnace insulation.
The pure silica fibre felts provided by Final Advanced Materials are available untreated or calcined. The calcination process removes the fibres on the surface, thus improving their performance and their resistance to heat. A polyvinyl acetate (PVA) binder is also possible.
For more information regarding the availability, refer to the technical data sheet.
Applications of Pure Silica Fibre Felts
- Insulation of industrial furnaces
- Catalytic supports for heating systems
- Replacement of asbestos and ceramic fibre
- Thermal insulation in the manufacture of optical fibre
- Insulation of engine in aeronautics
General Data of Pure Silica Fibre
Technical Data of Pure Silica 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.