Pure silica


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.

Felt 1200°C

Il apparaît tout en haut de la fiche produit de votre boutique, dans les listes de produits, et dans les résultats des moteurs de recherche (d'où son importance pour le SEO). Pour fournir davantage d'informations sur votre produit, utilisez l'onglet "Description".

Full description