Mica

MUSCOVITE & PHLOGOPITE

Mica products come in two basic forms, Phlogopite and Muscovite. Muscovite Mica materials operate up to a maximum temperature of 500o C whilst the Phlogopite grades operate up to 700oC.

Both grades can be supplied in sheet or paper formats. From these formats we can manufacture tubes and rods or machined shapes. Furthermore, where flexibility is required, both products are available.

These flexible sheets can also be bonded to RCF or RCF Free High Temperature Paper to provide a flexible high temperature insulating material.

In sheet form the mica base is bonded using high temperature resins which typically operate up to a maximum of 3000C and burn out at higher temperatures leaving the Mica in situ.

Other benefits include:

  • Excellent thermal insulation properties
  • Low moisture absorption
  • High strength
  • Excellent compressive strength
  • Excellent electrical insulation properties
USED IN
  • Platen Press Insulation
  • Thermal Barriers
  • Coil Insulation
  • Separators
  • Switchgear Insulators
  • Element Plates
  • Isolators
Typical Composition
  • Integrated Muscovite or Phlogopite Mica Paper (approx 70-90% by weight)
  • Silicone Resin Binders, polymerised under pressure and temperature(approx 10%)
  • Retained Solvent < 0.5%
  • Woven Glass Cloth, Non-Woven Glass Mat, Bio-Soluble Silica Magnesia Paper, Mineral Wool Paper
KEY DATA
COLOUR DENSITY MAXIMUM TEMPERATURE THERMAL CONDUCTIVITY COMPRESSIVE STRENGTH @ 200˚C TENSILE STRENGTH FLEXURAL STRENGTH
Kg/m3 ˚C W/mK MPa MPa MPa
MUSCOVITE Silver/Grey 2150 500 0.30 250 150 230
PHLOGOPITE Green/Grey 2300 700 0.30 240 110 170
FLEXIBLE Silver/Grey 1850 500 0.40 - - -
FIBROUS Silver/White 450 1150 0.10 - - -
WATER ABSOPTION DIELECTRIC STRENGTH TRACKING VOLUME DIELECTRIC LOSS RELATIVE ARC
24hr/23˚C 400˚C/1 hour RESISTANCE RESISTIVITY @ 400˚C 160˚C PERMITTIVITY RESISTANCE
<1 kV/mil v Ω/cm % 400˚C L3
MUSCOVITE <1 13 500 >1012 <1 7 2.2.1.0
PHLOGOPITE <1 13 525 >1012 <1 6.5 2.2.1.0
FLEXIBLE - 5 - - - - -
FIBROUS - 7 - - - - -

CONTACT

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Esspee Fabrications Ltd
149 Merton Bank Road
St. Helens
Merseyside
WA9 1DZ
Tel : +44 (0) 1744 28304
Fax : +44 (0) 01744 28826
Email: sales@esspee.com

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DY9 9JH
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203 Al Hawai Tower
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Huidong Intl
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