4590results about "Stacked capacitors" patented technology

The invention discloses a high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film and a preparation method thereof. The high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film is prepared from the following raw materials in parts by weight: 100 parts of polypropylene; 17 to 36 parts of polyvinylidene fluoride; 3-12 parts of enhanced and improved talcum powder; 1-6.5 parts of modified barium titanate; 1-6 parts of a cross-linking agent; 2-10 parts of a compatilizer; and 0.05-2 parts of an initiator. The capacitor base film is high in mechanical strength, and has excellent high temperature resistance, thermo-oxidative aging resistance, high voltage resistance and anti-breakdown performance; the enhanced and improved talcum powder is constructed by taking expanded layer modified talc as a carrier and titanium dioxide-carbon dot composite particles as a loading component and grafting and coating the organic matter, so that the defects of the talcum powder can be overcome, and the improvement effect of the talcum powder on heat resistance, high-voltage resistance and breakdown resistance can be fully exerted; meanwhile, the system can be endowed with excellent thermo-oxidative aging resistance.

The invention belongs to the technical field of thin film capacitors, and particularly relates to a chemical grafting modified polypropylene capacitor film material and a preparation method and application thereof. According to the preparation method of the chemical grafting modified polypropylene capacitor film material, provided by the invention, diethylenetriamine ethyl acrylate with a plurality of specific groups such as amino groups and carboxyl groups and unsaturated double bonds is synthesized through esterification reaction, and the diethylenetriamine ethyl acrylate is introduced into a polypropylene material through chemical grafting to obtain chemical grafting modified polypropylene; the prepared polypropylene capacitor film material has the excellent properties of good compatibility, difficulty in film breakage, capability of adsorbing and removing residual moisture, difficulty in oxidation corrosion, excellent breakdown resistance and the like, and the preparation method is a preparation method of the high-performance polypropylene capacitor film material; therefore, the technical problem that a polypropylene capacitor film material prepared in the prior art is low in performance is solved.

The invention belongs to the technical field of nickel electrode slurry preparation, discloses a preparation process of ultra-fine particle size roll-printed nickel electrode slurry for an ultra-high capacity MLCC, and aims to solve the problems that in the prior art, ultra-fine nickel powder is easy to oxidize, the cost of covering nickel nitride powder is high, a covering layer is easy to damage and agglomerate during dispersion, and the performance of the slurry is poor. The method comprises three steps of raw material pretreatment, synchronization of material dispersion and nitridation, post-treatment and nitrogen protection, wherein the pretreatment is used for removing impurities and preventing oxidation, dispersion and nitridation are carried out synergistically through a sand mill and an ultrahigh-pressure homogenizer in a graded regulation and control mode, the post-treatment comprises filtering, inspection and double-layer vacuum packaging, the raw materials are prepared according to a specific proportion, key parameters are precisely regulated and controlled, and finally the slurry is prepared. Roll printing adaptability and co-firing requirements are met, independent nitridation and reduction procedures are omitted, cost is reduced, slurry uniformity, dispersion stability and MLCC reliability are improved, and large-scale mass production can be achieved.

A multilayer electronic component according to an example embodiment of the present disclosure may include: a body including a plurality of capacitance formation portions including first dielectric layers and internal electrodes alternately arranged in a first direction. An intermediate layer disposed is between the adjacent capacitance formation portions and includes a second dielectric layer. An external electrode is disposed on the body and connected to the internal electrode. The first and second dielectric layers may include a plurality of grains and pores. An average grain size of the first dielectric layer may be smaller than an average grain size of the second dielectric layer. A porosity of the first dielectric layer may be lower than a porosity of the second dielectric layer.

The invention discloses an interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material and a method. The interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material comprises a maleic anhydride grafted polypropylene matrix and a core-shell structure filler dispersed in the maleic anhydride grafted polypropylene matrix, the core-shell structure filler comprises hydroxylated boron nitride nanoparticles covalently grafted on a polymer shell layer on the surface of the core-shell structure filler; the polymer shell layer is polyglycidyl methacrylate; the epoxy group of the polymer shell layer reacts with the anhydride group of the maleic anhydride grafted polypropylene matrix to form a covalent bond. The invention has the characteristics of strong interface bonding force, uniform filler dispersion, and excellent comprehensive electrical properties and processability.

The vacuum heat treatment clamp applies a certain pressure to the capacitor core, the core is in an inert gas and negative pressure environment for staged heating, finally, a heat conduction box body is slowly deflated, and after the air pressure in the heat conduction box body is balanced with the atmospheric pressure, the heat conduction box body is opened, so that the capacitor core is subjected to vacuum heat treatment. And taking out the capacitor core. According to the process, the capacitor core is located in the negative pressure inert gas environment, the product is isolated from air and is not oxidized, gas in the product can be easily exhausted through the negative pressure environment, and an internal air gap is eliminated; the capacitor core is located in the middle of the heat treatment clamp, different portions of the capacitor core are evenly heated, product shrinkage is even and consistent, and the voltage resistance and the charging and discharging capacity of a capacitor are obviously improved.

The multilayer electronic component includes a laminate in which internal electrodes and dielectric layers are alternately laminated, a base electrode, and an external electrode. The internal electrodes include a first internal electrode and a second internal electrode. The base electrode includes a first base electrode and a second base electrode. The external electrode includes a first external electrode and a second external electrode. Each of the first base electrode and the second base electrode contains a plurality of sintered bodies made of dielectric particles. At least a part of the plurality of sintered bodies is located at the interface between each base electrode and the laminate.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a high-performance polypropylene capacitor film. The preparation process comprises the following steps: A1, preparing a polypropylene capacitor film; a2, carrying out surface cleaning and activation pretreatment on the polypropylene capacitance film; a3, evaporating a gradient modified layer on the surface of the pretreated polypropylene capacitance film; a4, carrying out laser plasma synergistic treatment and crystallinity regulation and control on the modified polypropylene capacitor film; and A5, coating the outer layer of the modified polypropylene capacitance film with a functional layer, and carrying out annealing post-treatment to prepare the high-performance polypropylene capacitance film. The mechanical strength and the electrical stability are improved through nano filler dispersion, two-way stretching and crystallinity regulation and control; through the collaborative design of surface cleaning and activation and a gradient functional layer, excellent interface bonding force and environmental adaptability are given; and by means of technologies such as multi-source evaporation and laser plasma co-processing, precise regulation and control and diversified expansion of the performance are achieved, the method is suitable for various scenes, and the process repeatability is good.

A band-pass filter includes a first port, a second port, first to third high-pass filters provided between the first port and the second port in this order from a first-port side in a circuit configuration, and a low-pass filter provided between the second high-pass filter and the third high-pass filter in the circuit configuration. Each of the first to third high-pass filters forms an attenuation pole on a low-pass side of the passband. A frequency of the attenuation pole formed by the second high-pass filter is higher than a frequency of the attenuation pole formed by each of the first and third high-pass filters.

In a multilayer ceramic capacitor, a segregation amount of silicon and magnesium on an outer layer side of an outermost internal electrode layer is larger than a segregation amount of silicon and magnesium on an inner layer side of the outermost internal electrode layer, and when a region defined by an existence region of the outermost internal electrode layer and a segregation region of silicon and magnesium in contact with the outermost internal electrode layer is defined as a first region, a line edge roughness of an outer layer side of the first region is larger than a line edge roughness of an inner layer side of the first region.

A multilayer ceramic electronic component includes a first extension portion including a bent portion in a cross section. The multilayer body is divided into four regions by a straight line passing through a middle portion of the multilayer body in a lamination direction and a straight line passing through a middle portion of the multilayer body in a length direction, and a region adjacent to a first main surface and a first end surface among the divided four regions is defined as a first reference region, and a regression line derived based on values of x and y with respect to the bent portion in a reference region is defined as a virtual connection line, the virtual connection line intersects an effective layer portion.

A multilayer ceramic electronic device includes an element body including a dielectric layer and an electrode layer being laminated. The dielectric layer contains a main component represented by a formula ABO3. The dielectric layer contains 0.05 mol or more and 0.25 mol or less Mn oxide in terms of MnO; 1.00 mol or more and 2.50 mol or less Mg oxide in terms of MgO; 0.50 mol or more and 1.50 mol or less R oxide in terms of R2O3, where R includes at least one selected from the group consisting of Y, Dy, Ho, Yb, Lu, Gd, and Tb; and 0.05 mol or more and 0.45 mol or less Zr oxide in terms of ZrO2, with respect to 100 mol of the main component. The dielectric layer further contains V. The dielectric layer has a Zr / V ratio of 2.00 or more and 4.00 or less in atomic ratio.

The invention provides a compatibilization modified polypropylene capacitor film material with high dielectric property, a preparation method and a capacitor, polypropylene is used as a matrix, ZrO2 with high dielectric constant is used as a nano filler, maleic anhydride grafted polypropylene is used as a compatilizer, and the compatibilization modified polypropylene capacitor film material with high dielectric property is prepared by a method of reducing interfacial force through the compatilizer. The dispersity of the nano zirconium oxide in the matrix is improved, the agglomeration phenomenon of the nano zirconium oxide is reduced, and the nano zirconium oxide is more uniformly dispersed in the matrix, so that the dielectric property of the nano zirconium oxide is improved. The polypropylene-based composite material has the advantages of safety, stability, simplicity in operation, low production cost, good mechanical properties and the like, is suitable for large-scale production, and has a wide application prospect; the thin film capacitor prepared from the material has the advantages in the aspects of current bearing, dielectric loss bearing and the like.

The invention provides a capacitor core rod plug dismounting device, and belongs to the technical field of capacitor preparation, and the device comprises a strip-shaped frame which is vertical and is provided with two open ends, and the front and rear inner side surfaces are provided with guide grooves; the clamping assembly comprises two movable rods arranged on the two sides of the strip-shaped frame respectively, the axes of the two movable rods are coaxial and are perpendicular to the side face of the strip-shaped frame, and the opposite ends of the two movable rods are elastically arranged in a telescopic mode along the axes and are provided with clamping plates; the two movable rods are synchronously and oppositely arranged along the axis in a moving manner; the pair of bearing rods is horizontally arranged below the strip-shaped frame and perpendicular to the side face of the strip-shaped frame, and the two bearing rods are movably arranged in the width direction of the strip-shaped frame; the dismantling assembly comprises two pairs of top plates which are vertically arranged below the corresponding guide grooves respectively, and the top plates are movably arranged in the width direction of the strip-shaped frame and the axis direction of the movable rod; the two bearing rods respectively penetrate through the two pairs of top plates; and the transmission assembly is arranged between the movable rod and the bearing rod. The dismounting device can achieve the purpose of automatically pulling out the plug, and the production efficiency of the thin film capacitor is improved.

The invention relates to a biaxially oriented polypropylene composite film for a capacitor and a preparation method of the biaxially oriented polypropylene composite film. The biaxially oriented polypropylene composite film is of an ABA three-layer structure; wherein the layer A is prepared from the following raw materials: PP, a nucleating agent and a composite filler of MAH-g-PP and nanoparticles; the layer B is prepared from the following raw materials: PET master batch, modified silicon dioxide and a brush polymer. According to the preparation method, the three-layer structure composite film is prepared, the layers are firmly combined through covalent bonds, hydrogen-bond interaction and the like, and the interlayer peel strength is remarkably improved; a nano particle filler with a high dielectric constant is introduced into the A-layer structure, so that the dielectric strength of the film is improved, and meanwhile, the film has relatively high anti-breakdown strength; and the layer B effectively improves the mechanical stability of the film material, and has higher mechanical property and material rigidity compared with the traditional PP film.

A multilayer ceramic capacitor includes a multilayer body and outer electrodes on two surfaces of the multilayer body. The multilayer body includes an inner-layer portion and two outer-layer portions. The inner-layer portion includes first dielectric layers laminated in the lamination direction and a first inner electrode between the first dielectric layers. Each outer-layer portion includes at least one second dielectric layer and a second inner electrode in contact with the at least one second dielectric layer. A length of the second inner electrode is less than a length of the first inner electrode, or a width of the second inner electrode is less than a width of the first inner electrode. When each outer-layer portion is divided into two equal regions, a porosity of a region near the inner-layer portion is less than a porosity of a region farther from the inner-layer portion.

The present invention provides a polypropylene resin composition, a high-temperature resistant polymer film containing the same, and a preparation method and application thereof. By mass percentage, the polypropylene resin composition includes 79.7-98.9% of polypropylene resin, 1-20% of cycloolefin copolymer, and 0.1-0.3% of radiation crosslinking agent; the glass transition temperature of the cycloolefin copolymer is 120-160 °C; in the present invention, the film including the polypropylene resin composition has a high heat distortion temperature and a low thermal shrinkage rate, good high-temperature resistance, does not affect the dielectric properties of the film capacitor, has a small dielectric loss, can be biaxially stretched at a high draw ratio, and has a low cost.

The invention relates to the technical field of high-molecular polypropylene films, and discloses a PP film for a low-loss capacitor, which is prepared from the following ingredients in parts by mass: 80 to 95 parts of heat-resistant polypropylene resin base materials, 3 to 12 parts of dielectric modifiers, 0.1 to 0.2 part of nucleating agents, 0.05 to 0.8 part of lubricating agents and 1 to 3 parts of stabilizing agents. Through the synergistic effect of specific components, for example, large conjugate structures of the dielectric modifier and the stabilizer synergistically absorb and dissipate electric field energy and the like, the dielectric loss of the PP film is effectively reduced, so that the PP film can reduce heating of a capacitor in a high-frequency or high-voltage application scene, the service life of the capacitor is prolonged, and the safety of the capacitor is improved; and the strict standard of modern electronic equipment on dielectric loss of the capacitor is met. The PP film provided by the invention can maintain the stability of dielectric constant and dielectric loss in a high-temperature working environment, solves the problem of performance reduction caused by insufficient heat resistance of a traditional PP film, and expands the applicability of a capacitor in a high-temperature application scene.

The invention discloses a high-temperature-resistant BOPP capacitor film and a preparation method and application thereof.The high-temperature-resistant BOPP capacitor film is prepared from polypropylene and organic semiconductor master batch, and the organic semiconductor master batch comprises a conjugated organic semiconductor polymer and a cyclic olefin polymer; the conjugated organic semiconductor polymer and the cyclic olefin polymer are added into the polypropylene to prepare the high-temperature-resistant BOPP capacitor film, the high-temperature-resistant BOPP capacitor film is used for preparing a thin-film capacitor, and the high-temperature-resistant performance of the thin-film capacitor can be remarkably improved.

Thin polymer films may comprise a first polymer layer comprising poly(vinylidene fluoride); a second polymer layer comprising poly(vinylidene fluoride); and a nanofiller-polymer layer interposed between the first polymer layer and the second polymer layer, the nanofiller-polymer layer comprising poly(methyl methacrylate) and nanosheets dispersed in the poly(methyl methacrylate); the nanosheets comprising mica nanosheets and / or hexagonal boron-nitride nanosheets; wherein 50-99% of the nanosheets in the nanofiller-polymer layer are oriented parallel to a width dimension of the first polymer layer.

A multilayer ceramic capacitor includes a multilayer body having a dimensional relationship of the dimension in the width direction is greater than the dimension in the length direction which is greater than the dimension in the height direction. The dimension in the width direction of a third surface portion of a first external electrode is smaller than the dimension in the width direction of a first surface portion. The dimension in the width direction of an eighth surface portion of a second external electrode is smaller than the dimension in the width direction of a sixth surface portion. The dimensions in the height direction of a fourth surface portion and a fifth surface portion of the first external electrode are smaller than the dimension in the height direction of the first surface portion.

A glass powder, a conductive paste, and a method for manufacturing a laminated ceramic capacitor are provided. The purpose of the present disclosure is to provide a general-purpose glass powder capable of obtaining sufficient adhesive properties for laminated chips constituting various laminated ceramic capacitors, and a technique relating to the same. The glass powder disclosed herein is a glass powder for use in a conductive paste, the glass powder comprising the following composition in terms of mass ratio in terms of oxides: SiO2: 6-18 wt%; b2O3: 18 wt% to 30 wt%; znO: 26 wt% to 47 wt%; al2O3: 2 wt% to 17 wt%; 10 wt% to 25 wt% of CaO, and substantially does not contain BaO.

A multilayer ceramic electronic component includes a multilayer body including first and second internal electrode layers extending first and second end surfaces, first and second external electrodes respectively on the first and second end surfaces and respectively connected to the first and second internal electrode layers. The first external electrode includes first and third Cu plating layers, the second external electrode includes second and fourth Cu plating layers. Average numbers of Cu particles are about 1.5 or less in two or more first or second square regions of the first and second Cu plating layers. Average numbers of Cu particles are more than about 1.5 in two or more third or fourth square regions of the third and fourth Cu plating layer. The first square regions to the fourth square regions each has a square or substantially square shape with each side having a dimension of about 2 μm.

The invention belongs to the technical field of functional ceramics, and particularly relates to an X7R type anti-reduction BaTiO3-based dielectric ceramic material as well as a preparation method and application thereof. The BaTiO3-based dielectric ceramic material comprises a main body material and a doping material, the main body material is BaTiO3, and the doping materials comprise MgO, CaCO3, Y2O3 and MnCO3; the molar ratio of the BaTiO3 to the MgO to the CaCO3 to the Y2O3 to the MnCO3 is 100 to (0.5 to 2.2) to (0.5 to 2.2) to (0.5 to 2.2) to (0.4 to 1.5). The dielectric constant, the reduction resistance, the service life and the temperature stability of the dielectric material for the MLCC are improved by controlling the dosage of each component, especially the molar ratio of MgO, CaCO3, Y2O3 and MnCO3.

According to the present invention, a laminate (110) includes a plurality of dielectric layers (140) and a plurality of internal electrode layers (150), which are laminated in the lamination direction. External electrodes (120, 130) are provided on the laminate (110) and are electrically connected to the plurality of internal electrode layers (150). The external electrodes (120, 130) include base electrode layers (121, 131) which are provided on the laminate (110), Ni plating layers (122, 132) which are provided above the base electrode layers (121, 131), and Sn plating layers (123, 133) which are provided on the Ni plating layers (122, 132). This multilayer ceramic electronic component (100) has a dimension in the length direction orthogonal to the lamination direction of 0.12 mm to 0.42 mm inclusive, a dimension in the width direction orthogonal to both the lamination direction and the length direction of 0.06 mm to 0.22 mm inclusive, and a dimension in the lamination direction of 0.06 mm to 0.22 mm inclusive. The ratio of the dimension of the average grain size of the crystals that are positioned on the surfaces of the Sn plating layers (123, 133) to the dimension of the average thickness of the Sn plating layers (123, 133) is 0.73 to 1.31 inclusive.

The invention provides an implantable wireless passive blood pressure monitoring device, which relates to the technical field of blood pressure detection and comprises a blood pressure sensor and an in-vitro reading device, the blood pressure sensor comprises an outer inductance coil and an internal interdigital capacitor; the inductance coil is connected with the interdigital capacitor through a cross-layer line to form a capacitance-inductance LC loop; the inductance coil and the interdigital capacitor are packaged in the soft base material silicon rubber; the blood pressure sensor is used for being attached to the outer wall of an artery blood vessel, and the resonant frequency of the blood pressure sensor can change along with compression tensile deformation of the blood vessel; the in-vitro reading device is used for reading the resonant frequency of the blood pressure sensor; wherein the resonant frequency read by the in-vitro reading device is used for calculating a blood pressure value. The implantable wireless passive blood pressure monitoring device provided by the invention is used for providing a blood pressure monitoring mode with high measurement precision and small trauma so as to improve the accuracy and comfort of blood pressure monitoring.

The invention belongs to the technical field of thin-film capacitors, and particularly relates to a high-temperature-resistant high-energy-storage polypropylene capacitor film material and a preparation method and application thereof. According to the high-temperature-resistant high-energy-storage polypropylene capacitor film material provided by the invention, the high-temperature-resistant polar core-shell nanofiller is introduced into the polypropylene capacitor film material, so that the polypropylene capacitor film material has excellent dielectric constant, breakdown strength and energy storage density at a high temperature, the film is not easy to break, and the processability is good; large-area and high-efficiency industrial production is facilitated, the requirements of industrial large-scale production of high-temperature-resistant miniaturized polypropylene capacitor film materials are met, and winding type or laminated type film capacitors and the like can be manufactured; meanwhile, the performance of the polypropylene capacitance film material is further improved by improving the shell layer polar ionic liquid and the core layer high-temperature-resistant nano-filler in the high-temperature-resistant polar core-shell nano-filler; therefore, the technical problem of low performance of the polypropylene capacitor film material in the prior art is solved.

The invention relates to an internal serial metallized film, a preparation method, a filter capacitor and a base film, the base film is made of a blending material of polyethylene glycol terephthalate and polyethylene naphthalate according to a mass ratio of 2: 3, and the thickness of the base film is 8-12 [mu] m; the multi-layer metallization layer is arranged on the base film and comprises a first metal layer, a buffer layer and a second metal layer, the buffer layer is located between the first metal layer and the second metal layer, the patterned structure forms a plurality of conductive units which are connected in series on the multi-layer metallization layer, each conductive unit is in a regular hexagon shape, and the first metal layer is arranged on the first metal layer. The side length of the conductive units is 3-6mm, and an isolation belt with the width of 0.3-0.8 mm is arranged between the adjacent conductive units. According to the invention, a plurality of key performance indexes such as high-frequency filtering performance, voltage endurance capability, oxidation resistance, structural stability, light transmission and the like are optimized and improved.

Provided is a multilayer ceramic capacitor capable of reducing stress.　A base electrode layer 32 of an external electrode 30 in this multilayer ceramic capacitor 10 includes an end surface electrode part 40 and a wraparound electrode part 41 that wraps around at least one among a first main surface 12a, a second main surface 12b, a first side surface 12c, and a second side surface 12d from a first end surface 12e and a second end surface 12f. The wraparound electrode part 41 includes base end side parts 42 positioned on the first end surface 12e and the second end surface 12f sides, and tip side parts 43 positioned on the tip sides of the base end side parts 42 away from the first end surface 12e and the second end surface 12f. At least one tip-side adhesion interface 53a where a laminate 12 is adhered to the tip side parts 43, and at least one tip-side non-adhesion interface 53b where the laminate 12 is not adhered to the tip-side parts 43, are included in tip-side interfaces 53 of the laminate 12 facing the tip-side parts 43.

The invention discloses a strontium-doped bismuth titanate-based ferroelectric film and a preparation method thereof, and belongs to the technical field of dielectric energy storage materials. The chemical composition of the film is Ba < 1-x > Sr < x > Bi < 4 > Ti < 4 > O < 15 >, wherein x ranges from 0.025 to 0.1. The preparation method comprises the following steps: mixing ethylene glycol monomethyl ether and ethylene glycol, adding bismuth nitrate, barium acetate, strontium acetate and butyl titanate, fully stirring and filtering to obtain a precursor solution, aging, dripping to the center of a substrate for spin coating, heating a spin-coated sample to obtain a dry film, and annealing to obtain the ferroelectric film. The method is low in technological condition requirement, and the thin film obtains the optimal energy storage density by changing the doping proportion of Sr. According to the ferroelectric film, when x is equal to 0.075, the leakage current density of Ba0. 925Sr0. 075Bi4Ti4O15 (BBST75) is only 1.59 * 10 <-7 > A / cm < 2 >, the breakdown field strength is as high as 3.22 MV / cm, and at the moment, the film has the energy storage density of 28.2 J / cm < 3 > and the energy storage efficiency of 80.36%.