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MICA CHARACTERISTICS


 Muscovite Physical Prpoerties

Item Properties
Absolute specific gravity  2.7-3.0 g/cm3
Hardness  2.8-3.2 Mohs
Modulus of elasticity  1.6-2.1×106 kg/cm2
Coefficient of expansion  Perpendicular to cleavage plane: 15-25×10‐6 /K
 Parallel to cleavage planes :8-9×10‐6 /K
Specific heat  880 J/(kg・K)
Thermal conductivity  0.55-0.79 J/(s・m・K)
Melting point  1250 ℃
Calcining temperature  550 ℃ (Dehydrating temperature of OH in crystal)
Volume resitivity  1014-1015 ohm・cm
Relative permittivity  7 (at 50〜108 Hz)
Power factor (Loss tangent)  2-10×10-4 tanδ(at 50〜108 Hz)
Dielectric strength  25 kV/mm
Color  Browninsh transparent (Super-fine powder appears white)
Refractive-index  n1=1.5993
 n2=1.5944
 n3=1.5612

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