Machinable mica board 500-700°C

Machinable mica board 500-700°C

MC-5000 mica is comprised of 90% Muscovite mica and 10% silicone binder. The continuous service temperature is 500°C, with possible peaks up to a maximum of 700°C. MC-5000HT mica is comprised of 90% phlogopite mica and 10% silicone binder.

Mica panels can be used as a replacement for products containing asbestos.

Main characteristics

  • Low thermal conductivity
  • Good resistance to high temperatures
  • A good electrical insulator
  • Easy to machine and gluer
  • Non-toxic

Applications

  • Reduction of heat losses between the plates of forging presses, on the grounds of its resistance to pressure at high temperatures

  • In the glass industry, the thermal properties and abrasion resistance of MC-5000 are advantageous. Example: formation of guides for bottles leaving the mould.

  • Its dielectric properties, electrical arcing resistance and erosion resistance make it suitable for high-voltage applications..

  • In the gas distribution sector, this material is used for the sealing of connections in internal systems. 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.

  • For the highest temperatures, the MC-5000 HT version is available, with a continuous temperature withstand of 700°C and a peak withstand of 1,000°C. Its mechanical characteristics are inferior by a margin of 10%.

Technical characteristics

 

Reference

Units

MC-5000

MC-5000 HT

 

Continuous temperature

°C

550

750

Peak temperature

°C

700

1000

Density

kg/m3

2150

2200

Cold crush resistance, perpendicular to the panel

MPa

400

400

Crush resistance at 200°C, perpendicular to the panel

MPa

250

250

Cold tensile strength, perpendicular to the panel

MPa

150

110

Cold bending strength, perpendicular to the panel

MPa

230

120

Linear expansion, perpendicular to the panel

10-6 K-1

100

100

Linear expansion, parallel to the panel

10-6 K-1

10

10

Thermal conductivity, perpendicular to the panel

W/mK

0.3

0.3

Thermal conductivity, parallel to the panel

W/mK

3

3

Specific heat

J/kg.K

866

866

Fire loss under continuous exposure to 500°C

%

< 1

< 1

Water absorption (24h at 23°C)

%

< 1

< 0.5

Dielectric withstand at 20°C

kV/mm

25

25

400°C / 1h, tested at 20°C

kV/mm

13

13

600°C / 1h, tested at 20°C

kV/mm

10

10

Resistivity at 20°C

Ω.cm

> 1016

> 1016

Resistivity at 400°C

Ω.cm

> 1012

> 1012

Resistivity at 500°C

Ω.cm

> 109

> 109

Maximum size of panels

mm

1,200 x 1,000

1,200 x 1,000

Thickness

mm

up to 80

up to 30

tolerance margin of panel thickness             1.5 – 5 mm

%

 ± 7

 ± 7

5 - 30 mm panel

%

 ± 5

 ±5

30 - 80 mm panel

%

 ± 3

 ± 3

BS476 fire resistance

 

1

1

 NBN 21-203 fire resistance

 

A1

A1

NFF 16 101 & 102 fire resistance

 

MO & FO

MO & FO

UL 94 fire resistance

 

V-0

V-0



Our products are available in the form of panels. On the basis of your plans, our workshops can machine any parts required in accordance with your plans. Contact us.

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.