Pure Silica Fibre

Pure Silica Fibre

Final Advanced Materials offers a full range of products in various forms of pure silica including felts.  

What are Pure Silicate Fibres

Our pure silica fibre products contain more than 99.95% or silica. They 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. 

Pure silica fibre can withstand a continuous temperature of 1,050 °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. Silica products are particularly valued in aeronautics and aerospace in for their exceptional dielectric properties, especially in the construction of radome.

Manufacturing of Pure Silica Fibres 

Quartz is one of the purest form of silica; which is a natural component of many mineral (SiO2). Once it has been crushed and purified, raw material is heated up to its metling point to produce silica. It is then flexed into a fibre which is modified depending on its final use.

Applications of Pure Silica Fibres 

  • 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

General Characteristics of Pure Silica Fibres

Property

Unit

Pure Silica

Density

g/cm3

2.2

Poisson Coefficient

-

0.6

Dielectric Constant at 10 GHz

-

3.74

Resistitvity at 20 °C

Ω.m

1 x 1,020

Resistitvity at 1,000 °C

Ω.m

1 x 108

Linear Expansion Coefficient

10-6.K-1

0.54

Max. Operating Temperature

°C

1,000

Peak Temperature

°C

1,200

Specific Heat at 20 °C

J.kg-1.K-1

7.5 x 10²

Thermal Conductivity at 20 °C

W.m-1.K-1

1.38

Refractive Index

-

1.4585

Benefits of Pure Silicate Fibres

  • No shrinkage at high temperatures
  • Environmental friendly manufacturing
  • Security guidelines do not apply
  • Excellent dielectric properties
  • Excellent mechanical properties
  • No moiture uptake
  • Excellent resistance to fire
  • High thermal stability up to 1,050 °C

Comparison

Property

Unit

Pure Silica

E-Glass Kevlar®

Density

g/cm3

2.2

2.6

1.44

Poisson Coefficient

-

0.16

0.25

0.36

Breaking Strength

MPa

3,600

2,400

3,000

Elongation

%

7.7

3.5

2.4

Linear Expansion Coefficient

10-6.K-1

0,54

2,400

- 2

Max. Operating Temperature

°C

1,000

3.5

300

Peak Temperature

°C

1,200

450

Specific Heat
at 20 °C

J.kg-1.K-1

750

2.2

1,420

Thermal Conductivity
at 20 °C

W.m-1.K-1

1.38

1.38

0,4

Products from Pure Silica Fibres

Felts, up to 1,200 °C

Our pure silica felts contain 99.95% SiO2. Composed of silica fibres assembled with polyvinyl alcohol, they can be used in temperatures of up to 1,200 °C. Even at a continuing operating temperature of 1,000 °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. These products differenced themselves from other silica products by their exceptional dielectric properties, especially in the construction of radomes.

Other Pure Silica Products

We also offer pure silica fibre in the form of threads, fabrics and loose fibres. Finished products are only produced on request:

  • Threads
  • Roving
  • Bulk Fibre
  • Wool
  • High- and Low-Density Felts
  • Fabrics
  • Ropes
  • Veiling

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.

Pure Silica Fibre (190.64k)

Technical Data Sheet: Pure Silica Fibre


Felt 1200°C

These felts are popular in aeronautics for engine insulation thanks to their exceptional insulating and fire-fighting characteristics.
Full description