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      Potassium Aluminosilicate ( Muscovite Mica )

      Material Information

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      General Description:  

      Mica is a naturally occurring mineral and as such its exact composition varies between grades, as will its properties. Ruby Mica is the highest grade of Muscovite Mica. The name comes from the latin 'micare', to shine or glitter. It can be split into thin uniform layers, down to 0.05mm. The high skill involved in such splitting results in a high cost. Mica is transparent, and resistant to heat, as well as being one of the best electrical insulators known. It is resistant to high temperatures and chemically inert to most substances.

         

      Chemical Resistance

      Acids - concentrated Fair
      Acids - dilute Good
      Alkalis Good

      Electrical Properties

      Dielectric constant 6.0-6.6
      Dielectric strength ( kV mm-1 ) 40-200
      Volume resistivity @25C ( Ohmcm ) 1012

      Mechanical Properties

      Compressive strength ( MPa ) 190-280
      Hardness - Vickers ( kgf mm-2 ) 2-3 Mohs
      Shear strength ( MPa ) 215-265

      Physical Properties

      Density ( g cm-3 ) 2.6-3.2
      Refractive index 1.5-1.6
      Useful optical transmission range 450-700nm
      Water absorption - saturation ( % ) Very Low

      Thermal Properties

      Coefficient of thermal expansion @20-1000C ( x10-6 K-1 ) 9-36
      Specific heat @25C ( J K-1 kg-1 ) 50
      Thermal conductivity @20C ( W m-1 K-1 ) 0.5-7
      Upper continuous use temperature ( C ) 500-600

      Buy Potassium Aluminosilicate on-line

      We stock and supply the following standard forms:
      Sheet
      Sheet

      Choose a form to search our on-line catalogue  

      Index