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Cuming Microwave Low Loss Dielectric Stock Materials - 210 Series View larger

Cuming Microwave C-STOCK LOW K Low Loss Plastic Stock

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  • Series of sheet stock materials
  • With dielectric constants less than 2.0
  • Is a rigid, low density, very fine-textured syntactic foam
  • With excellent physical properties
  • Can be easily machined
  • Available in sheets 12" x 12"

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Cuming Microwave C-STOCK LOW K Low Loss Plastic Stock with adjusted Dialectric Constant

C-STOCK LOW K is a series of sheet stock materials with dielectric constants less than 2.0. These materials also exhibit low loss tangents and have densities well below conventional dielectrics.

C-STOCK LOW K is a rigid, low density, very fine-textured syntactic foam with excellent physical properties and can be easily machined. Suggested uses include antenna, waveguide and coaxial support applications. High-Q RF coils using these materials display improved performance.

C-STOCK LOW K is available in sheets 12in x 12in. in a variety of thicknesses ranging from 0.25 to 4.0in. Parts can be readily machined with conventional machine tools. Assemblies can be built up using compatible C-Bond adhesives.  

ELECTRICAL PROPERTIES
 Low K-39Low K-34
Dielectric Constant1.91.7
Dissipation Factor<0.004<0.004
Volume Resistively, ohm-cm10x101410x1014
Dielectric Strength, volts/mil300260
PHYSICAL PROPERTIES
 Low K-39Low K-34
Service Temp., °C-70 to +150
Density, lb/ft33934
Specific Gravity0.630.54
Thermal Conductivity, BTU-in/hr-ft2°F0.700.60
Cal-cm/sec-cm2°C2.4x10-42.1x10-4
Coefficient of Linear Expansion, per °C50x10-650x10-6
Water absorption, % gain in 24 hr @ 30°C<0.1<0.1

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