部分材料介電系數(shù)
SubstanceDielectric Constant(relative to air)
DielectricStrength(V/mil)
LossTangent
ABS (plastic), MoldedAir
Alumina - 96% - 99.5%Aluminum SilicateBakelite
Bakelite (mica filled)Balsa WoodBeeswax (yellow)Beryllium oxideButyl RubberCarbon TetrachlorideDiamond
Delrin (acetyl resin)Douglas Fir
Douglas Fir PlywoodEnamel
Epoxy glass PCB
Ethyl Alcohol (absolute)Ethylene GlycolFormica XX
FR-4 (G-10) - low resin - high resinFused quartz
Fused silica (glass)
Gallium Arsenide (GaAs)GermaniumGlass
Glass (Corning 7059)
2.0 - 3.51.00054109.6
5.3 - 5.53.74.7
1.37 @ 1 MHz1.22 @ 3 GHz2.53 @ 1 MHz2.39 @ 3 GHz6.7
2.35 @ 1 MHz2.35 @ 3 GHz2.17 @ 1 MHz2.17 @ 3 GHz5.5 - 103.7
1.9 @ 1 MHz1.93 @ 1 MHz1.82 @ 3 GHz5.15.2
24.5 @ 1 MHz6.5 @ 3 GHz41 @ 1 MHz12 @ 3 GHz44.94.23.8
400 - 135030 - 70
0.00500 - 0.01900.0002 @ 1 GHz0.0002 @ 100 MHz0.0003 @ 10 GHz
325 - 375
0.012 @ 1 MHz0.100 @ 3 GHz0.0092 @ 1 MHz0.0075 @ 3 GHz0.006 @ 10 GHz0.001 @ 1 MHz0.0009 @ 3 GHz<0.0004 @ 1 MHz0.0004 @ 3 GHz
500
0.023 @ 1 MHz0.026 @ 1 MHz0.027 @ 3 GHz
450700
0.09 @ 1 MHz0.25 @ 3 GHz-0.03 @ 1 MHz1 @ 3 GHz0.008 @ 100 MHz0.008 @ 3 GHz0.0002 @ 100 MHz0.00006 @ 3 GHz0.0016 @ 10 GHz
3.813.116
4月10日5.75
Glass (lead silicate)7月14日Gutta-percha2.6Halowax oil4.8High Density Polyethylene (H1.0 - 5.0
Ice (pure distilled water)4.15 @ 1 MHz
3.2 @ 3 GHz
Kapton? Type 1003.9 Type 1502.9Kel-F2.6Lexan?2.96Lucite2.8
0.0036 @ 10 GHz
(Table 2: LS30-LS32)
475 - 3810
0.0000400 - 0.00100
0.12 @ 1 MHz0.0009 @ 3 GHz
74004400400
MahoganyMica Mica, RubyMicarta 254Mylar?Neoprene
Neoprene rubber
2.25 @ 1 MHz1.88 @ 3 GHz4.5 - 8.05.4
3.4 - 5.43.26月9日
6.26 @ 1 MHz4 @ 3 GHz
0.025 @ 1 MHz0.025 @ 3 GHz
3800 -5600
7000600
0.038 @ 1 MHz0.034 @ 3 GHz
800400200200
Nomex?Nylon3.2 - 5Oil (mineral, squibb)2.7Paper (bond)3Paraffin2月3日Phenolica (glass-filled)5月7日Phenolics (cellulose-filled)4月15日Phenolics (mica-filled)4.7 - 7.5Plexiglass?2.2 - 3.4
Polyethylene LDPE/HDPE2.26 @ 1 MHz
2.26 @ 3 GHz
Polyamide2.5 - 2.6Polycarbonate, Molded2.8 - 3.4Polypropylene2.2Polystyrene2.5 - 2.6Polyvinylchloride (PVC)3Porcelain5.1 - 5.9Pyrex glass (Corning 7740)5.1Quartz (fused)4.2RT/Duroid 58802.2
0.03 @ 100 MHz
450 - 990
450 - 1200
0.0002 @ 100 MHz0.00031 @ 3 GHz0.000660 - 0.01000.0001 @ 100 MHz0.00033 @ 3 GHz
380 - 96550050072540 -280335
150 - 200
(go to?Rogers)
RubberRubySiliconSilicone oilSilicone RTVSoil (dry sandy)
3.0 - 4.011.3
11.7 - 12.9
150 - 500100 - 700
0.005 @ 1 GHz0.015 @ 10 GHz
2.53.6
2.59 @ 1 MHz2.55 @ 3 GHz
Soil (dry loamy)2.53 @ 1 MHz
2.44 @ 3 GHz
Steatite5.3-6.5Strontium titanate233Teflon? (PTFE)2.0 - 2.1
2.6 - 2.3Tenite2.9 - 4.5Transformer oil4.5Vacuum (free space)1Valox?Vaseline2.16
550
0.017 @ 1 MHz
0.0062 @ 3 GHz0.018 @ 1 MHz0.0011 @ 3 GHz
1000
0.00028 @ 3 GHz0.0007 - 0.0119
1560
0.00004 @ 0.1 GHz0.00066 @ 3 GHz
Vinyl
Water (32°F)
(68°F)
(212°F)
Water (distilled)
Wood2.8 - 4.58880.455.376.7 - 78.21.2 - 2.1800.04 @ 1 MHz0.157 @ 3 GHz0.005 @ 100 MHz0.157 @ 3 GHz0.04 @ 0.1 GHz
0.03 @ 3 GHz
Max Temp(°F)
171 - 228180
158 - 248500275
250450280170
239 - 275250140170300480300400