Mica

MUSCOVITE & PHLOGOPITE

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

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 300˚C 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 THERMAL COMPRESSIVE TENSILE FLEXURAL
TEMPERATURE CONDUCTIVITY STRENGTH @ 200˚C STRENGTH STRENGTH
Kg/m3 oC W/mK MPa MPa MPa
MUSCOVITE Silver/Grey 2150 500 0.30 250 150 230
PHLOGOPITE Grey/Green 2300 700 0.30 240 110 170
FLEXIBLE Silver/Grey 1850 500 0.40 - - -
FIBROUS Grey/White 450 1150 0.10 - - -
WATER ABSORPTION DIELECTRIC STRENGTH TRACKING VOLUME DIELECTRIC LOSS RELATIVE ARC
24hr/23˚C 400˚C/1 hour RESISTANCE RESISTIVITY @ 400˚C 160˚C PERMITTIVITY RESISTANCE
% 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 - - - - -
The data provided is taken from average test results conducted under standard procedures and conditions and should not be used for specification purposes.

To receive a quotation call:+44(0)174428304

CONTACT

Get In Touch
UK (Accredited Office)
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

Esspee Fabrications Ltd.
UK Midlands Office
Esspee Midlands
Wassall Grove Lane
Stourbridge
West Midlands
DY9 9JH
Tel : +44 (0)1562 881026
Fax : +44 (0) 872 331 3117
Email: simon@esspee.co.uk

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Middle East Office
Esspee Middle East
P O Box 74345
203 Al Hawai Tower
Sheikh Zayed Road,
Dubai, UAE
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Esspee China
1910 Building E
Huidong Intl
16 Jinpu Rd, Nanning
Guangxi
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Fax : +86 771 556 1640
Email: chunyuyang20@gmail.com
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