Write two types of Dielectrics ???
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Dielectrics can have different chemistry and composition, and can be solid, liquid or gas. Some are mentioned below—
Electrostatic capacitors
Plastic films like PP, PET, PC, PS, and some others
Paper, often impregnated with oil / wax / gel
Ceramics
Mica
Glass
Vacuum
Air / gas
Oils of different types
Electrolytic capacitors
Oxides of aluminium formed on foil
Tantalum oxide in Tantalum capacitor
Niobium oxide
Supercapacitors/ Ultracapacitors
Supercapacitors have Fine layers of oxide naturally formed on electrode surfaces due to action of electrolytes. No separate dielectric is used. This gives maximum possible capacitor value, in Farad range.
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