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Crystex Composites Mykroy/Mycalex MM 371 Molding Grade Glass-bonded Mica Composite  (discontinued **)
Categories: Ceramic; Glass; Glass Ceramic
Material Notes: Discontinued. Replaced with RoHS compliant grade MM451.

Natural mica filler. Does not burn. Good radiation resistance (3 x 10^10 Rads-Cobalt). This leaded grade is not ROHS compliant.

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.
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Physical PropertiesOriginal ValueComments
Density 4.80 g/cc
Moisture Absorption at Equilibrium 0.00 %Nil
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell A 47
Hardness, Rockwell H 90
Tensile Strength, Ultimate 6500 psi
Flexural Strength 10000 psi
Compressive Strength 35000 psi
Izod Impact, Notched 8.00 ft-lb/in
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+14 ohm-cm
Surface Resistivity per Square 1.00e+15 ohm
Dielectric Constant 12.5
@Frequency 1e+6 Hz
Dielectric Strength 350 V/mil
Dissipation Factor 0.0060
@Frequency 1e+6 Hz
Dielectric Loss Index 0.075
@Frequency 1e+6 Hz
Arc Resistance 300 sec
 
Thermal PropertiesOriginal ValueComments
CTE, linear 11.2 µm/m-°C
@Temperature 350 °C
 13.02 µm/m-°C
@Temperature 25.0 °C
Specific Heat Capacity 1.046 J/g-°C
Thermal Conductivity 0.930 W/m-K
Maximum Service Temperature, Air 370 °C

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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CMYKROY28 / 1660




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