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

Cuming Microwave C-STOCK .0005 Very Low Loss Polystyrene Sheet and Rod Stock

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  • Specialty plastic product
  • With very low loss tangent (dissipation factor)
  • Homogeneity of dielectric constant and loss tangent
  • Excellent temperature stability
  • The material is a crosslinked polystyrene
  • Thermosetting plastic
  • It does not melt at elevated temperatures

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Test Equipment Description

The C-STOCK .0005 is a specialty plastic product with very low loss tangent (dissipation factor), homogeneity of dielectric constant and loss tangent and excellent temperature stability. The material is a crosslinked polystyrene, which is a thermosetting plastic, thus it does not melt at elevated temperatures.

C-STOCK .0005 is useful in many RF and microwave applications. It has been used extensively for microwave lenses, antenna insulators, and for a multitude of uses as supports and machined parts in waveguide and coaxial transmission lines.

C-STOCK .0005 has good optical clarity and is readily machined using standard practices for rigid plastics machining. It may be bonded in place using most epoxy adhesives, acrylates or flexible urethane adhesives.

AVAILABILITY

C-STOCK .0005 is available in 12 x 12in. sheets ranging from 0.125 to 6.0in. thickness and rods 12in long from 0.125 to 6.0in. diameter. Larger sheets and rods can be supplied on special order.

Cuming Microwave can also machine and fabricate custom parts to drawings. Please call our Technical Service Dept. for details.

TYPICAL PROPERTIES
Loss tangent0.0005
Dielectric constant2.54
Homogeneity of dielectric Constant±0.01
Volume resistivity, ohm-cm>1016
Dielectric strength – volts/mil500
Thermal conductivity, (BTU x in/hr x ft2°F)0.87
Coefficient of linear expansion35x10-6/ºF
Water absorption – weight
Percentage0.003
Operating temperature-94 + 257,
Range, °F390, short term
Specific gravity1.06
Tensile strength – psi11,000
Flexural strength – psi17,000
Modules of elasticity – psi300,000

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