Mica-Silicone Composite

 MC-5000 mica plate with silicone binder

Overview: Mica-Silicone Composite

Final Advanced Materials processes mica in various forms. It can be employed in the form of a textile, for flexible solutions, but also in the form of a solid sheet material. Regardless of the product selected, the properties of mica make it an ideal candidate for thermal insulation applications.

MC-5000HT mica is composed of 90% phlogopite mica and 10% silicone binder. Mica panels can be used as a replacement for products containing asbestos. The continuous service temperature is 1,000°C. 

Important: it is necessary for MC5000-HT to be compressed between two plates or flanges. Mechanical compression prevents any crumbling of the product in response to the action of temperature, given that the silicone binder deteriorates at temperatures in excess of 300 °C, and replacement of the component will therefore be necessary after dismantling.

Mica composite materials are mainly used in the following areas:

  • In the glass industry, the thermal properties and abrasion resistance of MC-5000 are advantageous.
  • In the gass distribution sector, its pressure resistance and high-temperature resistance permit the prevention of gas leaks, even during a fire.
  • In the induction furnace construction sector, MC-5000 is employed for its thermal and electrical insulating properties, and for its permeability to high-frequency waves.
  • Reduction of heat losses between the plates of forging presses, on the grounds of its resistance to pressure at high temperatures 

Applications of Mica-Silicone Composite

  • Guide for bottles released from a mould
  • High-voltage applications
  • Sealing of internal network connections
  • Construction of induction furnaces
  • Forging presses

Main Characteristics of Mica-Silicone Composite

  • Low thermal conductivity
  • Good resistance to high temperatures
  • A good electrical insulator
  • Easy to machine and glue
  • Non-toxic
  • High mechanical strength
  • High compressive strength at high temperature
  • Excellent resistance to flame
  • Good electrical arcing resistance and erosion resistance

Dimensions of Mica-Silicone Composite

Type

MC5000-HT

Dimensions

Board

For every thickness: 1,220 x 1,020 mm and 1,200 x 1,000 mm
For 5, 10 and 15 mm thickness: 2,420 x 1,020 mm 

Tolerances

±0.7 % thickness 2 mm
-5 % to +7% from 2.1 to 6 mm
-4 % to +5 % from 6.1 to 40 mm
-2 % to +3% from 40.1 to 100 mm

Customed designs are available on request.

Other products available 

Depending upon requirements, it is also possible for this composite mica material to be procured in other forms (subject to the confirmation of a minimum order quantity and lead time): 

  • MC-5000 mica tubing (with similar characteristics to panels) up to a diameter of 300 mm and a length of 1,100 mm. 

  • Mica paper impregnated with a silicone resin, laminated on a woven glass-fibre base in order to provide temperature resistance, flame resistance and electrical insulation. This product is essentially used for the production of cables which are fire-resistant at temperatures of 1,000°C.

Minimum order required. 

Technical Data of Mica-Silicone Composite

Property

Unit

MC-5000HT

Item N°

080-0011

Composition

90 % phlogopite mica
10 % silicone resin

Density

kg/m3

2,200

Thermal Properties

Max. Operating Temperature

°C

700

Max. Peak Temperature

°C

1,000

Weight Loss

V-0 (UL 94)
< 2 % IEC 371-2

Thermal Conductivity ⊥ to the board

at 23 °C

W.m-1.K-1

0.30

at 100 °C

0.31

at 200 °C

0.32

at 300 °C

0.345

Mechanical Propertieses

Compressive Strength ⊥ to the board ISO 604

at 20 °C

kJ/m2

300

at 200 °C

MPa

240

Flexural Strength IEC 371-2

MPa

120

Tensile Strength ISO 527

MPa

110

Electrical Properties

Dielectric Strength IEC 371-2

kV/mm

25

Chemical Properties

Water Absorption IEC 371-2

%

< 0.5

Resistance to chemicals

Excellent

Thermal Expansion Coefficient

10-6 K-1

10



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.

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