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Rulon Bearings

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Crystex Composites Mykroy/Mycalex MM 500 Machining Grade Glass-bonded Mica Composite
Categories: Ceramic; Glass; Glass Ceramic; Machinable Ceramic

Material Notes: Synthetic mica filler. Does not burn. Better radiation resistance (3 x 10^10 Rads-Cobalt) than grade 400.

This ceramoplastic material is a versatile and efficient insulating material designed to meet the exacting demands of technical markets, worldwide. Glass-Bonded Mica is the only inorganic material to bridge the performance materials gap between organic plastics and ceramics.

This unique high performance technical ceramic is a union of finely powered electrical quality glass and precisely defined and classified mica. The union of mica and glass takes place under simultaneous pressure and heat, transforming the materials into a new composition that inherits all the insulating advantages of both constituents.

These materials are easily machined, mold like plastic, and have a wide range of operating temperatures. They find applications in the aircraft, laser, communications, aerospace, cryogenic, electronic, radiation, semiconductor, computer, automotive, and power distribution industries.

Typical data below provided by Mykroy/Mycalex Ceramics.

Key Words: Glass Bonded Mica
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Physical PropertiesOriginal ValueComments
Density 2.70 g/cc
Moisture Absorption at Equilibrium 0.00 %Nil
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell A 46
Hardness, Rockwell H 90
Tensile Strength, Ultimate 6000 psi
Modulus of Elasticity 12000 ksi
Flexural Strength 12500 psi
Compressive Strength 40000 psi
Izod Impact, Notched 1.70 ft-lb/in
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+14 ohm-cm
Surface Resistivity per Square 1.00e+12 ohm
Dielectric Constant 6.9
@Frequency 1e+6 Hz
Dielectric Strength 530 V/mil
Dissipation Factor 0.0013
@Frequency 1e+6 Hz
Dielectric Loss Index 0.0090
@Frequency 1e+6 Hz
Arc Resistance 260 sec
 
Thermal PropertiesOriginal ValueComments
CTE, linear 10.53 µm/m-°C
@Temperature 350 °C
 11.57 µm/m-°C
@Temperature 25.0 °C
Specific Heat Capacity 0.5021 J/g-°C
Thermal Conductivity 1.15 W/m-K
Maximum Service Temperature, Air 500 °CContinuous
 
Descriptive Properties
ColorLight Gray

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