Dielectric Constants Values

The dielectric constant values of different materials at temperature of 20°C (or else as stated below):


Vacuum 1
Air 1
Air(1 atm) 1.00059
Air(100 atm) 1.0548
Alcohol, ethyl (grain) 24.55
Alcohol, methyl (wood) 32.70
Amber 2.6 - 2.7
Asbestos fiber 3.1 - 4.8
Asphalt 2.6
Bakelite 5 - 22
Barium Titanate 100 - 1250
Beeswax 2.4 - 2.8
Benzene 2.284
Cambric 4
Carbon Tetrachloride 2.17
Calcite 8.0
Calcium carbonate 8.7
cellulose 3.7 - 7.5
Celluloid 4
Cellulose Acetate 2.9 - 4.5
Cotton 1.3
Diamond, type I 5.87
Diamond, type IIa 5.66
Durite 4.7 - 5.1
Ebonite 2.7
Epoxy Resin 3.4 - 3.7
Ethyl Alcohol 6.5 - 25
Fiber 5
Formica 3.6 - 6
Flour 3 - 5
Freon 12, -150 ℃ (liquid) 3.5
Freon 12, +20 ℃ (vapor) 2.4
Glass 3.8 - 14.5
Glass Pyrex 4.6 - 5
Glycerin 42.5
Gutta Percha 2.4 - 2.6
Germanium 16
Isolantite 6.1
Kevlar 3.5 - 4.5
Liquid ammonia(-78°C) 25
Lithium deuteride 14.0
Lucite 2.5
Mica 4 - 9
Ruby Mica 5.4
Micarta 3.2 - 5.5
Mycalex 7.3 - 9.3
Mylar 3.1
Neoprene 4 - 6.7
Nylon 3.4 - 22.4
Oil, linseed 3.4
Oil, mineral 2.1
Oil, olive 3.1
Oil, petroleum 2.0 - 2.2
Oil, silicone 2.5
Oil, transformer 2.2
Paper 1.5 - 3
Paraffin 2 - 3
Plexiglass 2.6 - 3.5
Polycarbonate 2.9 - 3.2
Polyethylene 2.25 - 2.5
Polyester 3.2 - 4.3
Polyimide 3.4 - 3.5
Polystyrene 2.4 - 3
Polyvinyl chloride 3.18
Porcelain 5 - 6.5
Potassium niobate 700
Quartz 5
Quartz, crystalline (∥) 4.60
Quartz, crystalline (⊥) 4.51
Quartz, fused 3.8
Rubber 2 - 4
Rubber, neoprene 6.6
Rubber, silicone 3.2
Rubber, vulcanized 2.9
Salt 5.9
Selenium 6
Shellac 2.9 - 3.9
Silicone 3.2 - 4.7
Silicon dioxide 4.5
Silicone oil 2.7 - 2.8
Slate 7
Soil dry 2.4 - 2.9
Steatite 5.2 - 6.3
Styrofoam 1.03
Strontiun titanate 310
Sulfur 3.7
Tantalum pentoxide 27
Teflon 2.1
Tin antimonide 147
Tin telluride 1770
Titanium Dioxide 100
Uranium dioxide 24
Vaseline 2.16 - 2.16
Vinylite 2.7 - 7.5
Water 80.4
Water distilled 34 - 78
Water, ice, –30 ℃ 99
Water, liquid, 0 ℃ 87.9
Water, liquid, 20 ℃ 80.2
Water, liquid, 40 ℃ 73.2
Water, liquid, 60 ℃ 66.7
Water, liquid, 80 ℃ 60.9
Water, liquid, 100 ℃ 55.5
Waxes, Mineral 2.2 - 2.3
Wax, beeswax 2.7 - 3.0
Wax, paraffin 2.1 - 2.5
Wax, carnuba 2.9
Waxed paper 3.7
Wood dry 1.4 - 2.9