RIGID MICROWAVE ABSORBING MATERIAL – RS-4900
RS-4900 is a rigid epoxy based magnetic castable microwave absorbing material capable of continuous operation up to 350of. This material is ideal for fabrication of low power loads, attenuators, ring chokes and other RF absorbing elements at microwave frequencies. RS-4900 can be supplied in custom cast configurations, standard stock shapes of plates, rods and bars, or in pourable kits.
APPROXIMATE PROPERTIES
| DENSITY | .170 LB/IN3 |
| DIELECTRIC CONSTANT @ 10 GHZ | 24.5 |
| LOSS TANGENT @ 10 GHZ | .02 |
| PERMEABILITY @ 10 GHZ | 1.4 |
| ATTENUATION @ 10 GHZ | 182 dB/IN. |
| VOLUME RESISTIVITY | >1.0 X 10`11 @ 77oF |
| DIELECTRIC STRENGTH | >25 V/MIL. |
| FLEXURAL STRENGTH | 15,000 PSI |
| TENSILE STRENGTH | 7,500 PSI |
| IZOD IMPACT STRENGTH | .35 FT. LB/IN |
| THERMAL EXPANSION | 18 X10-6 IN/IN/oF |
| THERMAL CONDUCTIVITY | 6.3 (BTU)(IN)/(HR)(FT2)(oF) |
| SPECIFIC HEAT | .29 BTU/ (LB)(F) |
| WATER ABSORPTION (20 DAYS @ 77oF) | .05% |
| NASA OUTGASSING RP 1124 – TOTAL MASS LOSS | 0.24% |
| NASA OUTGASSING – COLLECTED VOLATILE CONDENSABLE MATERIALS |
0.01 % |
| MAXIMUM USE TEMPERATURE | 350 oF |
| FUNGUS (NON-NUTRIENT PER MIL STD 810) | YES |
| JUNE 1995 | |
