Dielectric constant of liquids, gases and solids (Table)
In the table are given the values of the dielectric constant of some solids, liquids and gases for constant electric fields or for small frequencies, when the wavelength is infinitely large. Gases are assumed to be at atmospheric pressure; the temperature, including the values of ε indicated.
ε - dielectric constant
|
Substance |
t (°C) |
ε |
|
The dielectric constant of solids and liquids |
||
|
Diamond |
18 |
16.5 |
|
Amyl acetate |
18 |
4.8 |
|
Aniline |
18 |
7.3 |
|
Apatite |
18 |
8.5 |
|
Asphalt |
18 |
2.7 |
|
Acetone |
20 |
21.5 |
|
Bakelite |
18 |
3-5 |
|
Canadian Balsam |
18 |
2.7 |
|
Benzene |
18 |
2.3 |
|
Bromine |
5 |
3.1 |
|
Paper |
18 |
2-2,5 |
|
Water |
18 |
80.4 |
|
Beeswax |
18 |
2.5-3.0 |
|
Getinaks |
18 |
3.5-5.0 |
|
Glycerol |
15 |
39.1 |
|
Tree |
18 |
2.2-3.7 |
|
Titanium dioxide |
18 |
40-80 |
|
Rock salt |
20 |
5.6 |
|
Quartz Crystal |
18 |
4.5 |
|
Fused Silica |
18 |
3.5-4.1 |
|
Ivory |
18 |
6.9 |
|
Xylene (meta) |
18 |
2.4 |
|
Ice |
-18 |
3.2 |
|
Castor oil |
10.9 |
4.6 |
|
Olive oil |
21 |
3.2 |
|
Paraffin oil |
20 |
4.7 |
|
Transformer oil |
18 |
2.2-2.5 |
|
Marble |
18 |
8.3 |
|
Oil, kerosene |
21 |
2.1 |
|
Nitrobenzene |
18 |
36.4 |
|
Paraffin |
20 |
2.0-2.5 |
|
Rutile _ | _ axis |
20 |
86 |
|
Rutile ||axis |
20 |
170 |
|
Sulfur |
18 |
3,6-4,3 |
|
Carbon bisulfide |
20 |
2.6 |
|
Silvin |
18 |
4.9 |
|
Turpentine |
20 |
2.2 |
|
Mica |
18 |
5,7-7,0 |
|
Special ceramic materials containing BO and TiO2 |
18 |
1000-10000 |
|
Methyl alcohol |
13.4 |
35.4 |
|
Ethanol |
14.7 |
26.8 |
|
Glass mirror |
18 |
6-7 |
|
Glass crowns |
18 |
5-9 |
|
Flint Glass |
18 |
7-10 |
|
Barium titanate |
20 |
1200 |
|
Toluene |
14.4 |
2.4 |
|
Tourmaline ||axis |
18 |
6.0 |
|
Porcelain |
18 |
5,0-6,8 |
|
Chloroform |
22 |
5.2 |
|
Celluloid |
18 |
4.1 |
|
Carbon tetrachloride |
18 |
2.2 |
|
Shellac |
18 |
3.1-3.7 |
|
Ebonite |
18 |
2.5-2.8 |
|
Ethyl Ether |
18 |
4.3 |
|
Amber |
18 |
2.7-2.9 |
|
The dielectric constant of gases |
||
|
Nitrogen |
0 |
1.000606 |
|
20 |
1.000581 |
|
|
Hydrogen |
0 |
1.000264 |
|
20 |
1.000273 |
|
|
Air |
0 |
1.000590 |
|
19 |
1.000576 |
|
|
Helium |
0 |
1.000068 |
|
Oxygen |
0 |
1.000524 |
|
Methane |
0 |
1.000953 |
|
Carbon monoxide |
0 |
1.000690 |
|
Carbon dioxide |
0 |
1.000946 |