26results about "Electrets" patented technology

A vibration-driven energy harvester includes: a base; a movable assembly that includes a first movable electrode and a second movable electrode; a first fixed electrode disposed so as to face opposite the first movable electrode; a second fixed electrode disposed so as to face opposite the second movable electrode; an elastic support member having a fixed end fixed to the base, the elastic support member supporting the movable assembly; a first electret formed at least at one of the first movable electrode and the first fixed electrode; and a second electret formed at least at one of the second movable electrode and the second fixed electrode, wherein: a gap distance between a front end of the second movable electrode and a facing surface of the second fixed electrode facing the front end of the second movable electrode is different from a gap distance between a front end of the first movable electrode and a facing surface of the first electrode facing the front end of the first movable electrode.

To provide an electret apparatus that enables formation, within a short time, of an electret having uniformly mixed regions processed to positive and negative polarities, and that allows achievement of high collection efficiency of a nonwoven fabric.SOLUTION: An electret apparatus comprising a grounding electrode 2 and an applying electrode 3 that directly clamp a nonwoven fabric s to be processed, wherein the applying electrode 3 is in a roller shape composed of a metallic core member 3a to which a negative voltage is applied from a direct current power supply 4, and a resistor layer 3b provided on a surface of the core member 3a, such that corona discharge is generated from the applying electrode 3 and induced discharge is generated from the grounding electrode 2.SELECTED DRAWING: Figure 1

The electret (1) is obtained by subjecting an inorganic dielectric (2) to a charge treatment. The inorganic dielectric (2) is formed from a metal compound containing Al and / or Mg, and the total molar fraction of Al and Mg in the entire metal elements contained in the metal compound is more than 50%. The metal compound contains a metal oxide or a metal salt, and may be an oxide or salt containing Al, an oxide or salt containing Mg, or a composite oxide containing Al and Mg.

Provided is a copolymer capable of suppressing coloration even after heating. A copolymer containing a constitutional unit (A) derived from 11-dicyanoethylene and a constitutional unit (B) derived from a compound represented by the following general formula (I):in which the copolymer includes the following four kinds of triad structures (U-1) to (U-4) composed of the constitutional unit (A) and the constitutional unit (B),and a total content of (U-2) and (U-3) in a total amount of the four kinds of triad structures is 9.0 mol % or less.

A resin composition capable of providing a film or the like that can suppress coloration even after heating is provided. Further, a molded product, a film, a conductive film, a film capacitor, a polarized material, an electrostatic induction conversion device, and a touch panel using the resin composition are provided. A resin composition including: a copolymer (A) containing a constitutional unit (a1) derived from 1,1-dicyanoethylene and a constitutional unit (a2) derived from a compound represented by the following general formula (I); and a Bronsted acidic compound (B), in which a content of the Bronsted acidic compound (B) in the resin composition is 0.1 to 95,000 ppm by mass.

Described herein are electrets and electrical components comprising electrets. Electrical components comprising electrets described herein may be incorporated into power substrates, power electronic modules, and laminated busbars.

The present disclosure describes a strained dielectric material comprising at least one type of component containing a domain wall variant pattern, or superdomain structure, that is in phase-co-existence with, or in close phase proximity to, a paraelectric state achieved at zero electric field or over a finite range of non-zero electric field, wherein the at least one type of component comprises one or more of an in-plane sub-domain polarization component, a plane-normal sub-domain polarization component, or a solid solution of a ferroelectric.

Proposed is a method for producing an ambient energy converter comprising a plate-like carrier substrate, which consists of a first conductor material, as a first electrode, and comprising a layered structure, which is arranged on said first electrode and which has a layer of ferroelectric material and a layer of a second conductor material that differs from the first conductor material, as a second electrode. The two conductor materials have different concentrations of free electrons. The ferroelectric material comprises one or more ferroelectric semiconductors. Ferroelectric semiconductors that are used as ferroelectric material are selected from the list comprising sodium nitrite, semiconductor ceramics based on barium titanate, lithium niobate, potassium niobate, lead titanate, etc. The method comprises the following method steps: - providing a plate, which consists of the conductor material provided for the first electrode, as the carrier substrate, - subjecting the carrier substrate to at least one surface treatment, - applying the layer of ferroelectric material (FE layer) to a side of the carrier substrate which is intended as a front side, - masking at least the edges of the FE layer on the front side of the carrier substrate, leaving free at least one section situated within the edges of the FE layer, and - applying the conductor material provided for the second electrode to the section left free by the masking.

The invention belongs to the technical field of ferroelectric materials, and particularly relates to a Sr0. 4Na0. 2NbO3 doped Bi0. 5Na0. 5TiO3 (BNT) based ferroelectric film and a preparation method of the Sr0. 4Na0. 2NbO3 based ferroelectric film. A modified sodium bismuth titanate Bi0. 5Na0. 5TiO3 (BNT)-based material is doped with A / B site elements, Sr0. 4Na0. 2NbO3 with a tungsten bronze structure is selected as a doping component, the chemical composition is (0.94-x) Bi0. 5Na0. 5Na0. 2NbO3, the doping amount of the Sr0. 4Na0. 2NbO3 is 0.01-0.1, the doping amount of the Sr0. 4Na0. 2NbO3 is 0.01-0.1, and 1 mol% of manganese is additionally doped on the basis of the Sr0. 4Na0. 2NbO3. The lead-free ferroelectric film is prepared by a sol-gel method. The breakdown resistance (Eb) and recoverable energy storage density (Wrec) of the sodium bismuth titanate-based lead-free ferroelectric film prepared according to the invention are remarkably improved, compared with an undoped sample, the Eb is improved by 56%, the maximum polarization intensity (Pmax) reaches 102.4 [mu] C / cm < 2 >, and the Wrec is improved from 94.11 J / cm < 3 > to 128.82 J / cm < 3 > and improved by 37%.

To provide a fine element capable of independently designing an air gap and an electret.SOLUTION: A movable electrode part 3 and a fixed substrate 2 are arranged so as to face the movable electrode part 3 at an interval. The fixed substrate 2 is provided with a recessed hole 2c. Self-organizing electrets 9 of a polar molecular material are arranged in the 2c of the recessed holes by forming films on the fixed electrodes 8. The self-organizing electrets 9 are formed on the fixed electrodes 8 in the 2a of the concave holes so as to be flush with or protrude from the 2c of the upper surface of the fixed substrate 2.SELECTED DRAWING: Figure 1

Disclosed is a laminated piezoelectric sheet having an electrode laminated on at least one surface of a piezoelectric film, in which the electrode has a raised pattern on a surface on a side in contact with the piezoelectric film. It is possible to provide a laminated piezoelectric sheet that has good signal intensity and little in-plane variation of signal intensity as well as enabling mass production.

Materials with uniform electrostatic surface charge for antimicrobial pathogen inactivation while maintaining safety for use by individuals and workers (no cytotoxicity), as well as methods for making such antimicrobial materials and uses thereof.

A workpiece attraction device is provided that can dechuck (separate) the attracted workpiece in a short time and reliably even when transporting thin workpieces such as paper, cloth, or resin films. A workpiece attraction device includes: an electrostatic attraction body (1) capable of attracting a workpiece (W) to a workpiece attraction surface (1a) by applying a voltage to an attraction electrode (4a, 4b); and a workpiece separation body (5) that is interposed between an attracted workpiece and the electrostatic attraction body, and assists in separating the workpiece from the workpiece attraction surface after application of voltage to the attraction electrode is stopped. In the workpiece attraction device, the workpiece separation body has a plurality of opening portions (6) for applying a workpiece attraction force, generated on the workpiece attraction surface, toward a workpiece, the workpiece separation body is partitioned into the opening portions by a lattice portion (7) so that the opening portions are substantially uniformly present within a plane of the workpiece separation body, and in a plan view from a workpiece side with a workpiece attracted, the attraction electrode of the electrostatic attraction body does not face the lattice portion of the workpiece separation body.

To provide an electret device which has a long service life and in which an electrostatic property of an electret element enclosed in a sealed space can be prevented from deteriorating.SOLUTION: Provided is an electret device including a package member, a lid member, and an electret element. The lid member seals the package member to form a sealed space. The electret element is disposed in the sealed space. In the package member, at least a portion of an inner wall forming the sealed space is water-repellent.SELECTED DRAWING: Figure 2

The electret (1) is formed by polarizing a composite oxide containing two or more metal elements. A crystalline or amorphous oxide containing two different trivalent metal elements A and B and having a basic composition represented by the compositional formula A3B5O12, the crystalline or amorphous oxide having a band gap energy of 3 eV or more. The metal element A contains at least one element selected from trivalent rare earth elements, and the metal element B contains at least one element selected from typical trivalent elements.

[Problem] The present invention provides an electret material which has high charge retention ability and stretchability; and a skin-patch type electret energy harvesting device which uses this electret material. [Solution] According to the present invention, a perfluoroelastomer containing iodine and / or bromine or a crosslinked elastomer obtained by crosslinking this elastomer is used as an electret material. These materials have stretchability and are capable of forming an electret by being charged by means of a soft X-ray. In addition, a skin-patch type electret energy harvesting device is achieved by forming the electret on one of two comb-shaped electrodes that are arranged to be parallel to each other.

Provided is a long-life electret device preventing charge degradation of an electret element sealed in a closed space. The provided electret device includes: a package member; a lid member; and an electret element, the lid member seals the package member to thereby form a closed space, the electret element is placed in the closed space, and a hydrogen getter is included in at least part of an inside of the closed space.

An electret is made by subjecting a composite oxide containing two or more metal elements to a polarization treatment. The composite oxide is a crystalline or non-crystalline oxide containing two different trivalent metal elements A and B, and has a basic composition represented by composition formula A3B5O12. The composite oxide has a band gap energy of 3 eV or more. The metal element A includes at least one element selected from trivalent rare earth elements, and the metal element B includes at least one element selected from trivalent typical elements.

A resin composition capable of providing a film or the like that can suppress coloration even after heating is provided. Further, a molded product, a film, a conductive film, a film capacitor, a polarized material, an electrostatic induction conversion device, and a touch panel using the resin composition are provided. A resin composition including: a copolymer (A) containing a constitutional unit (a1) derived from 1,1-dicyanoethylene and a constitutional unit (a2) derived from a compound represented by the following general formula (I); and a Bronsted acidic compound (B), in which a content of the Bronsted acidic compound (B) in the resin composition is 0.1 to 95,000 ppm by mass.

An object of the present disclosure is to provide, for example, a fluoropolymer electret material with hardness. The present disclosure relates to an electret material comprising a fluoropolymer, wherein the fluoropolymer comprises, as a main component, a monomer unit represented by formula (1): wherein R1 to R4 are each independently a fluorine atom, a fluoroalkyl group, or a fluoroalkoxy group; and the fluoropolymer has a mass average molecular weight of 1 million or more and 5 million or less, or 5000 or more and less than 20000.

Materials with uniform electrostatic surface charge for antimicrobial pathogen inactivation meanwhile preserving safety (non-cytotoxicity) for personal and personnel use and methods for manufacturing such antimicrobial materials and uses thereof.

Transmitter system based on an ultra-high charge density electret is disclosed. The ultra-high charge density electret includes a three-dimensional structure having a plurality of sidewalls. A porous silicon dioxide film is formed on the plurality of sidewalls, and the porous silicon dioxide film is charged with a plurality of positive or negative ions.