876 results about "Ceramic capacitor" patented technology

The invention relates to the technical field of dielectric ceramic powder preparation processes, in particular to a multilayer ceramic capacitor, high-activity nano barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano barium titanate powder, and the method comprises the following steps: (1) reacting soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating the surfaces of the barium carbonate precursor particles with nano titanium dioxide particles by using a supercritical fluid flash evaporation technology to form a composite precursor; and (3) carrying out solid-phase synthesis reaction on the composite precursor, and sintering to obtain the nano barium titanate powder. Through the synergistic effect of two means of high-activity precursor preparation and nanoscale uniform coating, the composite precursor with extremely high specific surface area, surface energy and microcosmic uniformity is prepared, the thermal sintering temperature is effectively reduced, abnormal growth of crystal grains and lattice distortion are restrained, and the preparation method has the advantages that the preparation process is simple, and the preparation cost is low. The tetragonality of the nano barium titanate powder is obviously improved.

The present application relates to the technical field of dielectric ceramic powder preparation, and particularly relates to a multilayer ceramic capacitor, a high-activity nano-barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano-barium titanate powder, the method comprising the following steps: (1) reacting a soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating nano-titanium dioxide particles on the surface of the barium carbonate precursor particles by using a supercritical fluid flash technology to form a composite precursor; and (3) performing a solid-phase synthesis reaction on the composite precursor and sintering to obtain nano-barium titanate powder. The present application, through the synergistic effect of the two means of "high-activity precursor preparation" and "nano-level uniform coating", prepares a composite precursor with extremely high specific surface area, surface energy and micro-uniformity, effectively reduces the heat sintering temperature, suppresses abnormal grain growth and lattice distortion, and significantly improves the tetragonality of the nano-barium titanate powder.

The invention relates to a base metal high-voltage multilayer ceramic dielectric capacitor and a preparation method, the base metal high-voltage multilayer ceramic dielectric capacitor is formed by stacking and firing dielectric layers, and each dielectric layer comprises a dielectric layer and an electrode printed on the dielectric layer. The dielectric layer comprises the following raw materials: a BMYT main matrix, an NN material, magnesium oxide, manganous-manganic oxide, zirconium dioxide, calcium carbonate, strontium carbonate and rare earth oxide; through the raw material composition and the preparation method of the ceramic dielectric capacitor, the prepared ceramic dielectric capacitor has excellent performances of high dielectric constant, high voltage resistance, stable dielectric-temperature characteristic curve, low loss, high insulation resistance, long-term high-voltage reliability and the like under the condition of high dielectric thickness (30 microns before firing).

The invention provides a full-automatic ceramic capacitor arrangement machine which comprises a feeding and discharging conveying line and an arrangement machine, the feeding and discharging conveying line comprises a feeding position and a discharging position, and the feeding and discharging conveying line is used for conveying a screen frame on which a plurality of material carriers are placed. The arranging machine comprises a machine table, a first mechanical arm, an overturning dust removal station, a second mechanical arm, a temporary discharging and jacking station, a net pressing and centering station and an arranging station. The overturning dust removal station comprises an overturning mechanism and a dust removal mechanism; the temporary placing and jacking station comprises a temporary placing table; the net pressing and centering station comprises a centering mechanism and a net pressing mechanism, the centering mechanism is used for conducting centering operation on the material carrier, and the net pressing mechanism can conduct pressing operation on the material carrier; the arrangement station comprises a feeding device and an arrangement mechanism, the arrangement mechanism comprises a Y-axis linear driving device, a Y-axis sliding plate, a clamping mechanism and a plurality of material carrying assemblies, the feeding device can spread products and output the products to a material carrier, manpower can be saved, and the production efficiency can be improved.

To provide a multilayer ceramic capacitor in which occurrence of cracking or chipping at a boundary part between an end face side ineffective part and a vertical ridge line ineffective part of a laminated body is prevented.SOLUTION: A multilayer ceramic capacitor 1 includes: a multilayer body 10 including a plurality of stacked dielectric layers 20 and a plurality of internal electrode layers 30; and an external electrode 40 disposed so as to be electrically connected to the internal electrode layers 30. An outer surface of the multilayer body 10 at a boundary part VLB between an end face side ineffective part LG and a vertical ridge line ineffective part VG, the outer surface of a vertical ridge line ineffective part VG, and the outer surface of the multilayer body at a boundary part VWB between the vertical ridge line ineffective part VG and the side face side ineffective part WG form a continuous curved surface VR protruding outward in a plan view from a multilayer direction T, and a protective film SC containing carbon and silicon as constituent elements is formed on the curved surface VR.SELECTED DRAWING: Figure 3

A method for manufacturing a multi-layer ceramic capacitor (MLCC) end electrode and printing a full-area inner electrode protective layer is disclosed. The method uses thin dielectric ceramic layer thickness and a plurality of nickel inner electrode stacks to achieve high capacitance. The method produces high-density electrode-to-ceramic ratio end edges and side edges. The method uses an ultralow-temperature electrochemical deposition coating technology to manufacture a low-stress multi-layer ceramic capacitor end electrode and an insulating protective layer, thereby improving the yield of the multi-layer ceramic capacitor and reducing manufacturing costs.

A multilayer ceramic capacitor includes internal electrode layers including first internal electrode layers, second internal electrode layers, and intermediate electrode layers. At least a portion of each of the intermediate electrode layers has a coverage higher than a coverage of a region of a first counter portion of each of the first internal electrode layers adjacent to a first end surface, and a coverage higher than a coverage of a region of a second counter portion of each of the second internal electrode layers adjacent to a second end surface.

The invention relates to the technical field of multilayer ceramic capacitors, in particular to an MLCC product. The MLCC product comprises a plurality of blank dielectric layers and a plurality of inner electrode layers which are alternately stacked along a lamination direction, and a first end electrode and a second end electrode which are respectively positioned at two sides of the inner electrode layers, the inner electrode layer comprises a first type electrode layer and a second type electrode layer which are arranged in a crossed manner and are respectively connected to the first end electrode and the second end electrode; the stacking sequence of the inner electrode layers comprises at least one strengthening section in the stacking direction, and in the strengthening section, the number of at least one continuously arranged inner electrode layer of the same type is not less than 2. The MLCC product has a new stacking design, the sintering strength of the strengthening section can be improved, the voltage endurance capability and the current endurance capability of the strengthening section are improved, the failure rate in a voltage endurance experiment and a high-temperature and high-pressure experiment is reduced, and therefore the consistency and the reliability of the MLCC product are remarkably improved.

Provided is a multilayer ceramic capacitor that maintains electrical characteristics and ensures sufficient mechanical strength. In a multilayer ceramic capacitor (1), in a surface layer region (400), a side edge portion (16) includes a first segregation substance (133) having silicon as a main component and having a major diameter of 10 nm to 50 nm, and a second segregation substance (135) having silicon as a main component and having a major diameter of 1 [mu] m or more, a plurality of second segregation substances (135) are present in a cross section, and in the surface layer region (400), an additive component is included. The additive component includes at least one of zirconium, aluminum, titanium, and calcium, and the concentration of the additive component in the surface layer region (400) is higher than the concentration of the additive component in the inner region (402).

The base portion includes: a first outer layer portion (X1) positioned closer to the first main surface side than an internal electrode layer closest to the first main surface side in the stacking direction among the plurality of internal electrode layers; and a second outer layer section that is positioned closer to the second main surface side than an internal electrode layer that is closest to the second main surface side in the stacking direction among the plurality of internal electrode layers. The first outer layer portion (X1) and the second outer layer portion each include an outermost layer portion (Xa) disposed on the outermost side and an inner layer portion (Xb) located on the inner side of the outermost layer portion (Xa). The maximum height (Ha) of the irregularities on the outer surface of the outermost layer section (Xa) is smaller than the maximum height (Hb) of the irregularities on the outer surface of the inner outer layer section (Xb).

In a multilayer ceramic capacitor, when an internal electrode layer closest to one of outer layer portions is defined as an outermost internal electrode layer, the outermost internal electrode layer includes an internal electrode existing region and an internal electrode dividing region. The internal electrode dividing region includes a segregated region of magnesium or manganese, and a ratio B / A of a distance B in a length direction of the segregated region of magnesium or manganese relative to a distance A in the length direction of the internal electrode existing region is about 50% or more and about 75% or less.

A multilayer ceramic capacitor includes first and second inner electrode layers alternately laminated in a lamination direction with dielectric layers therebetween. Via conductors are electrically connected to the first inner electrode layers. The via conductors extend from an inside of a capacitor body to a first main surface of the capacitor body on one side in the lamination direction. Base electrode layers are provided on a portion of the via conductors on the first main surface. Plating layers are provided on the base electrode layers such that surfaces of the via conductors on which the base electrode layers are not provided are exposed to the outside on the first main surface.

The application relates to the technical field of capacitors, and discloses a multilayer ceramic capacitor and a preparation method thereof. The multilayer ceramic capacitor comprises a ceramic body and two end electrodes arranged on two end surfaces of the ceramic body respectively, the end electrodes extend to the outer circumferential surface of the ceramic body, the ends of the two end electrodes are arranged oppositely and have a distance therebetween, an insulating layer is arranged on the end electrodes, a conductive layer is coated on the insulating layer, the conductive layer covers the insulating layer and extends to the end electrodes, and the end portions of the end electrodes are exposed to the conductive layer. The application can realize automatic electrical performance sorting, the connection area of the multilayer ceramic capacitor and the circuit board is small, the distance between the two welding points is small, the piezoelectric vibration of the multilayer ceramic capacitor is effectively inhibited from being transmitted to the circuit board, the ringing noise of the circuit board is reduced, the plating solution penetration path is long, the plating solution cannot reach the inner electrode, and the insulation resistance is not reduced.

A multilayer ceramic capacitor (1), wherein a first external electrode (40A) and a second external electrode (40B) have first grooves (72A3, 72B3) extending in a layer stacking direction (T). In the first grooves (72A3, 72B3), a first base electrode layer (50A) and a second base electrode layer (50B) are directly connected to a first plating layer (70A) and to a second plating layer (70B). One end of each of the first grooves (72A3, 72B3) is open on a first main surface (TS1) side, and the other end of each of the first grooves (72A3, 72B3) terminates within a first end face (LS1) or within a second end face (LS2).

The application provides a ceramic capacitor chip jig, and belongs to the technical field of capacitor jigs. The ceramic capacitor chip jig comprises a bottom plate, a first supporting plate, a second supporting plate and a circumferential limiting structure. The top of the bottom plate is provided with a first area and a second area. The first supporting plate is connected to the first area of the bottom plate. The first supporting plate is provided with a welding position for placing a ceramic capacitor chip. The welding position of the first supporting plate is provided with an avoiding groove for placing a pin. The depth of the avoiding groove is greater than the diameter of the pin. The second supporting plate is connected to the second area of the bottom plate. The top of the second supporting plate is provided with a placing groove corresponding to the avoiding groove. The circumferential limiting structure is connected to the welding position of the first supporting plate to circumferentially limit the ceramic capacitor chip. Since the depth of the avoiding groove is greater than the diameter of the pin, after the ceramic capacitor chip is turned over, the pin is placed into the avoiding groove, the ceramic capacitor chip can be in contact with the first supporting plate, and the situation that the ceramic capacitor chip is not flat can be reduced.

This invention provides a bottom-electrode type multilayer ceramic capacitor that increases capacitance even in confined spaces. [Solution] The multilayer ceramic capacitor 10 comprises a laminate 12 having first and second surfaces 12a and 12b opposite to the lamination direction x, third and fourth surfaces 12c and 12d opposite to a first direction y perpendicular to the lamination direction, and fifth and sixth surfaces 12e and 12f opposite to a second direction perpendicular to the lamination direction and the first direction, first to third external electrodes 30a to 30c extending in the lamination direction of the fifth surface, a plurality of dielectric layers and internal electrode layers. The internal electrode layers include a first internal electrode layer 16a connected to the first external electrode and a second internal electrode layer 16b connected to the second and third external electrodes. The first internal electrode layer includes a first main part and a first lead portion projecting toward the first external electrode, and the second internal electrode layer includes a second main part and second and third lead portions projecting toward the second and third external electrodes, respectively.

The present invention provides a method for separating and recovering rare earth components and metal components from post-firing waste.　This separation and recovery method comprises: (A) a step for preparing post-firing waste of a multilayer ceramic capacitor in which a ceramic layer, an internal electrode layer containing a magnetic first metal component, and a fired electrode layer containing a non-magnetic second metal component are sintered; (B) a step for pulverizing the post-firing waste; (C) a step for separating and recovering, using a magnet, a first isolate containing a ceramic pulverized product and a first metal pulverized product, and a second isolate containing a ceramic pulverized product, a rare earth-containing product, and a second metal pulverized product; and (H) a step for recovering the first metal component from the first isolate after step (C) by electrolytic refining.

The application discloses a kind of Bi 3+ And Y 3+ Co-doped AgNbO3 antiferroelectric energy storage ceramic material and preparation method and application thereof, the chemical formula of the energy storage ceramic material is Ag 1‑3x Bi x Nb 1‑3x / 5 Y x O3, wherein 0 3+ And Y 3+ Co-doped AgNbO3 antiferroelectric energy storage ceramic material is in A / B site.The application also specifically discloses preparation method of the Bi 3+ And Y 3+ Co-doped AgNbO3 antiferroelectric energy storage ceramic material and application thereof in preparation of ceramic capacitor.The application prepares AgNbO3-based antiferroelectric energy storage ceramic material with pbcm space group perovskite structure by simple, easy-to-implement technical process, improves its breakdown field strength (E b ) While also reducing the remanent polarization value (P r ), and can effectively improve energy storage density and the stability of antiferroelectric phase at room temperature.

The present disclosure provides a composite particle, a multilayer ceramic capacitor, and a method for manufacturing the multilayer ceramic capacitor. The composite particle according to an embodiment of the present disclosure comprises: a conductive core; a conductive oxide layer disposed on the conductive core and including a metal oxide; and a coating layer disposed on the conductive oxide layer and including glass.

This invention provides a multilayer ceramic capacitor with improved internal electrode connectivity, high capacitance, and excellent reliability, as well as a method for manufacturing the same. [Solution] A multilayer ceramic capacitor according to one embodiment includes a capacitor body comprising a dielectric layer and an internal electrode layer, and an external electrode disposed on the outside of the capacitor body, wherein the internal electrode layer comprises nickel (Ni), aluminum (Al), and silicon (Si), and the Al / Si weight ratio is 0.01 to 1.

The utility model relates to the technical field of sensors, and discloses and provides a temperature and pressure integrated sensor which comprises a shell, the shell comprises a containing part with a hollow cavity and a cylindrical installation part, and a first medium channel and a wire channel are formed in the installation part in the axial direction of the installation part; the core body fixing piece is in a disc shape, a medium containing cavity is formed in one side of the core body fixing piece, a positioning supporting part extending in the axial direction of the core body fixing piece is arranged on the other side of the core body fixing piece, and a second medium channel penetrating in the axial direction is further formed in the core body fixing piece; one end of the probe is closed, and the other end of the probe is open; a ceramic capacitor, a flexible circuit board, a temperature sensor and a terminal button. The pressure detection element of the ceramic capacitor and the temperature sensor are integrated together, so that the ceramic capacitor has the advantages of being easier to process, rapid to assemble and better in stability, and the manufacturing cost and the application cost are effectively reduced.

This invention discloses a high-voltage ceramic capacitor with a reinforced concave structure, aiming to solve the problem of insufficient edge breakdown withstand voltage in traditional ceramic capacitors due to edge effects. The capacitor includes a ceramic core composed of a ceramic dielectric. Its innovation lies in the fact that the upper and lower electrode surfaces of the ceramic core are not planar, but rather form a concave structure that curves inward from the center, causing the ceramic body thickness to gradually increase from the center to the edge. This structure significantly improves the edge breakdown withstand capability through the synergistic effect of electric field homogenization and improved molding density. This invention significantly improves the power frequency withstand voltage of the capacitor to over 3.5kV per millimeter, while also exhibiting excellent comprehensive electrical performance such as low loss, high insulation, and high partial discharge initiation voltage. Furthermore, the manufacturing process is simple, does not increase volume, and has strong industrial applicability.

The invention provides a multilayer ceramic capacitor and a method of manufacturing the same. The multilayer ceramic capacitor includes: a capacitor body including a dielectric layer and an inner electrode layer; and an outer electrode disposed on an outer surface of the capacitor body, in which the inner electrode layer includes nickel (Ni), and a space lattice side length of the nickel (Ni) obtained according to Formula 1 by X-ray diffraction (XRD) analysis on the inner electrode layer is about to about [Formula 1] in Formula 1, lambda is a wavelength of a Cu K alpha ray, values of lambda are h, k and l are crystal plane indexes, and theta is a Bragg angle.

The utility model discloses a release film for a chip multilayer ceramic capacitor, which comprises a base material layer provided with a bearing surface and an inner surface opposite to each other along the layer thickness, core parts arranged along the transverse direction, and folding side edges respectively arranged at two sides of the core parts; the core ultra-light release layer is arranged corresponding to the core parts of the bearing surface and the inner surface; the side edge coating is arranged corresponding to the folded side edge of the bearing surface and is provided with first high-viscosity glue strips arranged in the transverse direction and ultra-light release strips clamped between the first high-viscosity glue strips; the second high-viscosity adhesive tape is arranged corresponding to the folding side edge of the inner surface and is opposite to the ultra-light release strip along the layer thickness direction; the side ultra-light release strips are adjacent to the second high-viscosity glue strip and are respectively arranged on two sides of the second high-viscosity glue strip; the first high-viscosity adhesive tape and the core ultra-light release layer on the bearing surface are in a coplanar state or the first high-viscosity adhesive tape and the second high-viscosity adhesive tape are in a fit state. By folding the edge of the ceramic dielectric green film wrapped by the side edge and folding the edge outwards, the two surfaces of the falling broken film chips are effectively prevented from being fixed, and the coating on the side edge adsorbs finer dust.

A multilayer ceramic capacitor includes a multilayer body including inner dielectric layers and internal electrode layers laminated therein, and external electrodes. Each of the inner dielectric layers includes a middle region at a middle portion and end regions at end portions in the length direction. A thickness of each of the inner dielectric layers is defined as Td, the middle region includes a first region with a dimension in the length direction of Td / 2 and a dimension in the lamination direction of Td, and second regions adjacent to the first region with a dimension in the length direction of Td / 2 and a dimension in the lamination direction of Td, the first region has a higher porosity than other regions, and a difference between a porosity in the first region and a porosity in each of the second regions is about 1% or more and about 5% or less.

The invention discloses a ferroelectric energy storage ceramic capacitor capable of being charged / discharged quickly and a preparation method, and relates to the field of functional ceramics and electronic devices, the ceramic component is (0.7-x) BiFeO3-0. 3BaTiO3-xBaZn1 / 3Nb2 / 3O3 + 0.1 wt% MnO2, the adopted preparation method is a high-temperature solid-phase reaction method, an upper top electrode and a bottom electrode are evaporated on the upper surface and the lower surface of a ceramic sample respectively, and the upper surface and the lower surface of the ceramic sample are subjected to high-temperature solid-phase reaction to obtain the ferroelectric energy storage ceramic capacitor capable of being charged / discharged quickly. A test result shows that the lead-free ferroelectric ceramic has relatively high energy storage density and charge-discharge rate; the preparation method has the outstanding advantages of simple preparation conditions, simple preparation process, stable energy storage characteristic, high charging and discharging speed and suitability for batch production.

A multilayer ceramic capacitor includes a multilayer body including first to sixth surfaces, a first outer electrode on the first surface and the third surface, a second outer electrode on the first surface and the fourth surface, a third outer electrode on the first surface and the third surface, and a fourth outer electrode on the first surface and the fourth surface. The multilayer body includes first and second outer electrodes. The first outer electrode includes a first base layer connected to the first inner electrode, a first thin film layer on the first surface, a first upper plating layer, and a first recess located on an inner side of the multilayer body and having a dimension in a second direction longer than a dimension in a first direction.

A multilayer ceramic capacitor may include a main body, comprising a first surface and a second surface which are opposite to each other in a first direction, a third surface and a fourth surface which are opposite to each other in a second direction which intersects with the first direction, and a fifth surface and a sixth surface which are opposite to each other in a third direction which intersects with both the first direction and the second direction, and the body includes a plurality of dielectric layers and a plurality of internal electrodes stacked in the third direction; and an outer electrode disposed on an outer side of the body, where the body may include an edge region in which the inner electrodes are not disposed, the edge region being disposed on an outer periphery of the plurality of inner electrodes facing the third surface and an outer periphery of the plurality of inner electrodes facing the fourth surface, a ratio of a width of the edge region to a width of the body measured in the second direction is greater than 8.5% and less than or equal to 9.5%, and wherein an average porosity of the edge region is greater than 0% and less than 1.1%.

This invention provides a high-voltage suppression and voltage regulation protection circuit, relating to the field of circuit protection technology. The circuit includes a high-voltage discharge elimination circuit, a π-type composite EMI filter network circuit, and a voltage regulator circuit connected in sequence, with terminals at both the input and output ends. The high-voltage discharge elimination circuit consists of four DC spark discharge tubes and two varistors. The π-type composite EMI filter network circuit includes two high-voltage ceramic capacitors, two inductors, and one common-mode inductor. The voltage regulator circuit consists of an electrolytic capacitor and a Zener diode. Through the synergistic effect of the front-stage high-voltage elimination, intermediate-stage filtering, and rear-stage voltage regulation, the circuit achieves suppression and voltage regulation protection against high-voltage interference ranging from kilovolts to tens of kilovolts, ensuring continuous normal operation of the circuit system under harsh high-voltage environments.

Disclosed is a highly reliable multilayer ceramic through-hole capacitor. It includes a multilayer ceramic through-hole capacitor body, which has at least one inner hole for inserting a first controlled expansion alloy tube. A guide pin is inserted into the first controlled expansion alloy tube, which undergoes annealing and surface electroplating treatment. The guide pin, first controlled expansion alloy tube, and inner hole are all fixed using lead-free solder. By welding the first controlled expansion alloy tube with the inner hole of the disk-shaped multilayer ceramic capacitor, the stress resistance capability of the capacitor is improved. This eliminates the need for lead-containing soldering materials with high ductility in the production process, allowing the capacitor to withstand multiple temperature changes without ceramic cracking. As a result, the multilayer ceramic through-hole capacitor achieves high reliability even in harsh external environments.