— EEStor, Inc. announces third party certification tests by Texas Research International’s Dr. Edward G. Golla, PhD., Laboratory Director. They certified that EEStor’s patented and patent pending Composition Modified Barium-Titanate Powders have met and/or exceeded a relative permittivity of 22,500. This is a high relative permittivity which is good for EEStor’s supercapacitors. EEStor’s supercapacitors could hold more charge than a battery but have the quick discharge and recharge performance of capacitors.
Relative permittivity effects capacitance is explained at allaboutcircuits.
DIELECTRIC MATERIAL: All other factors being equal, greater permittivity of the dielectric gives greater capacitance; less permittivity of the dielectric gives less capacitance.
Material Relative permittivity (dielectric constant)
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Vacuum ————————- 1.0000
Air —————————- 1.0006
PTFE, FEP (“Teflon”) ———– 2.0
Polypropylene —————— 2.20 to 2.28
ABS resin ———————- 2.4 to 3.2
Polystyrene ——————– 2.45 to 4.0
Waxed paper ——————– 2.5
Transformer oil —————- 2.5 to 4
Hard Rubber ——————– 2.5 to 4.80
Wood (Oak) ——————— 3.3
Silicones ———————- 3.4 to 4.3
Bakelite ———————– 3.5 to 6.0
Quartz, fused —————— 3.8
Wood (Maple) ——————- 4.4
Glass ————————– 4.9 to 7.5
Castor oil ——————— 5.0
Wood (Birch) ——————- 5.2
Mica, muscovite —————- 5.0 to 8.7
Glass-bonded mica ————– 6.3 to 9.3
Porcelain, Steatite ———— 6.5
Alumina ———————— 8.0 to 10.0
Distilled water —————- 80.0
Barium-strontium-titanite —— 7500
Here is a previous article on competing new batteries and ultracapacitors.
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