Abstract: When forming a conductive polymer layer serving as a cathode of a solid electrolytic capacitor, in order to obtain a high capacitance even with a small number of times of polymerization treatments, a capacitor anode according to the present invention includes a tungsten sintered body (2) and is provided with a dielectric film (1), and in which vanadium oxide is deposited on the surface of the dielectric film (1).

Abstract: An anode body for an electrolytic capacitor, prepared by sintering a tungsten powder to obtain a sintered body and subjecting the obtained sintered body to chemical conversion to form a dielectric layer comprising a tungsten trioxide compound on the surface of the sintered body, wherein the ratio of the hydration water in the tungsten trioxide compound becomes one molecule or less to 10 molecules of the tungsten trioxide compound. Use of the anode body of the present invention enables production of a tungsten capacitor, which is reduced in the capacitance change due to DC voltage (bias dependency).

Abstract: When forming a conductive polymer layer serving as a cathode of a solid electrolytic capacitor, in order to obtain a high capacitance even with a small number of times of polymerization treatments, a capacitor anode according to the present invention includes a tungsten sintered body (2) and is provided with a dielectric film (1), and in which vanadium oxide is deposited on the surface of the dielectric film (1).

Abstract: An anode body for an electrolytic capacitor, prepared by sintering a tungsten powder to obtain a sintered body and subjecting the obtained sintered body to chemical conversion to form a dielectric layer comprising a tungsten trioxide compound on the surface of the sintered body, wherein the ratio of the hydration water in the tungsten trioxide compound becomes one molecule or less to 10 molecules of the tungsten trioxide compound. Use of the anode body of the present invention enables production of a tungsten capacitor, which is reduced in the capacitance change due to DC voltage (bias dependency).

Abstract: A method of producing an anode body of a capacitor, which includes: forming a sintered body of tungsten powder; forming a dielectric body layer on a surface of the sintered body; and bringing the dielectric body layer into contact with an alkoxide compound of a valve metal after the formation of the dielectric body layer. The treatment step is performed so that: (A) a ratio of a mass reduction of the sintered body having formed thereon the dielectric body layer after differential thermal analysis from 100° C. to 300° C. to a mass of the sintered body before the analysis is 0.02% or less; (B) a ratio of a number of atoms of the valve metal other than tungsten to a number of tungsten atoms in a surface layer of the dielectric body layer is from 0.05 to 0.35; or (C) the requirements of (A) and (B) are satisfied.

Abstract: A tungsten powder for an electrolytic capacitor having good leakage current (LC) characteristics, which powder contains germanium element only in the particle surface region and having a germanium element content of 0.05 to 7 mass %. The tungsten powder preferably has a volume average diameter of the primary particle of 0.1 to 1 ?m; the germanium element is localized in a region from the particle surface to a depth of 50 nm inside the particle; the tungsten powder contains at least one member selected from tungsten silicide, tungsten carbide, tungsten boride, and tungsten containing nitrogen solid solution only in the particle surface region; the content of phosphorus element is 1 to 500 ppm by mass; and the oxygen content is 0.05 to 8 mass %.

Abstract: A tungsten powder for an electrolytic capacitor having good leakage current (LC) characteristics, which powder contains molybdenum element only in the particle surface region (first surface region) and having a molybdenum element content of 0.05 to 8 mass %. The tungsten powder preferably has a volume average diameter of the primary particle of 0.1 to 1 ?m; the molybdenum element is localized in a region from the particle surface to a depth of 20 nm inside the particle; the tungsten powder contains at least one member selected from tungsten silicide, tungsten containing nitrogen solid solution, tungsten carbide, and tungsten boride only in the particle surface region (second surface region); and the content of phosphorus element is 1 to 500 ppm by mass.

Abstract: The present invention provides an electrolytic capacitor which uses, as an anode body thereof, a sintered body that is obtained by sintering a tungsten powder containing zirconium element and/or hafnium element so that the content of one of these elements, which is contained in a larger amount, is 0.04 to 1 mass % and the element(s) is localized in the surface of tungsten particles. The electrolytic capacitor of the present invention has a large capacitance and good LC characteristics, while being suppressed in capacitance variation.

Abstract: A wireless power transfer system includes a power transmitter configured to wirelessly transfer alternating-current power components of different frequencies simultaneously, the different frequencies including at least a first frequency and a second frequency, and a power receiver having a rectifier circuit configured to convert the alternating-current power components to a direct-current power component, wherein the first frequency is 0.5 MHz to 10 GHz, and the second frequency is 10 Hz to 300 kHz lower than the first frequency.

Abstract: Provided is a composite material which is obtained by dispersing conductive filler in a polymer material, wherein an amount of the conductive filler added is 1 part by mass to 25 parts by mass with respect to 100 parts by mass of the polymer material, and wherein a relative dielectric constant of the composite material is 30 or higher and a dielectric loss tangent of the composite material is 3 or lower at an AC voltage with a frequency of 100 Hz.

Abstract: Provided is a transmission sheet constituting a transmission unit used for a non-contact power transmission system, wherein the transmission sheet comprises a functional composite material layer wherein the functional composite material layer is obtained by dispersing conductive filler in a polymer material, wherein an amount of the conductive filler added in the functional composite material layer is 90 parts by mass or less with respect to 100 parts by mass of the polymer material, and wherein a conductivity of the functional composite material layer is 10 S/m or higher.

Abstract: The capacitor material of the present invention is comprised by laminating a titanium dioxide layer and a titanate compound layer having perovskite crystals.

Abstract: The capacitor material of the present invention is comprised by laminating a titanium dioxide layer and a titanate compound layer having perovskite crystals.