Composite Dielectric Material, Capacitor and Methods for producing said Composite Dielectric Material and said Capacitor

The composite dielectric material according to one of the preceding claims, wherein the thermoplastic polymer is selected from the group comprised of:

• polypropylene, polystyrene, polyimide, polyethylenterephthalate, polyethylene naphthalate, polyphenylensulfide, polyamide, or polyphethylene.

The composite dielectric material according to one of the preceding claims, wherein the dielectric ceramic material is a ferroelectric dielectric ceramic material or a ceramic material having perovskite structure.

The composite dielectric material according to one of the preceding claims, wherein the dielectric ceramic material is selected from the group comprised of:

• barium titanate (BaTiO3), strontium titanate (SrTiO3), calcium copper titanate (CaCu3Ti4O12), strontium iron molybdate (Sr2FeMoO6), lanthanum calcium manganite ((LaCa)MnO3), lanthanum strontium manganite ((LaSr)MnO3), lanthanum barium manganite ((LaBa)MnO3), praseodymium calcium manganite ((PrCa)MnO3), strontium niobium oxide (SrNbO3), lanthanum manganite (La2MnO3), bismuth manganite (BiMnO3), yttrium manganite (YMnO3), terbium manganite (TbMnO3), bismuth nickel manganite (Bi2NiMnO6), lanthanum iron chromate (La2FeCrO6), bismuth iron chromate (BizFeCrO6), copper chrome selenide (CuCr2Se4), cadmium chrome selenide (CdCr2Se4), lanthanum nickel manganite (LazNiMnO6), neodymium chromate (NdCrO3) silicon dioxide (SiO2) or aluminum oxide (Al2O3).

The composite dielectric material according to one of the preceding claims, wherein said particles (3) are nanoparticles having a mean diameter in the range from 20 nm to 100 nm, particularly about 50 nm and/or said particles comprises a shell having a mean thickness of less than or equal to 15 nm, particularly in the range of 1 nm to 10 nm, more particularly 1 nm to 5 nm.

The composite dielectric materials according to one of the preceding claims, wherein the main body (2) of the composite dielectric material comprises a plurality of layers (A, B), wherein said plurality of layers comprises at least one first layer (A) and at least one second layer (B), wherein the at least one first layer (A) comprises a larger density of said particles (3) than the at least one second layer (B).

The composite dielectric material according to one of the preceding claims, wherein the main body (2) of the composite dielectric material comprises a plurality of first layers (A) and a plurality of second layers (B), wherein each first layer (A) comprises a larger density of said particles (3) than each second layer (B), wherein particularly the first and second layers (A, B) are arranged in an alternating fashion.

A method for producing a composite dielectric material (1), the method comprising the steps of:

• (a) Providing a mixture, the mixture comprising a gel comprising a thermoplastic polymer, and a dispersion comprising particles (3) consisting of a dielectric ceramic material, each particle being at least partially coated by a shell (30) comprising the thermoplastic polymer, and
• (b) Depositing at least one layer (A) of said mixture for producing the composite dielectric material (1).