56results about How to "High breakdown strength" patented technology

The invention provides BCZT-BNT-based lead-free composite energy storage ceramic with high breakdown strength and a preparation method of the BCZT-BNT-based lead-free composite energy storage ceramic, and belongs to the field of dielectric energy storage ceramic materials. The general formula of the chemical composition is (1-x) [0.25 (Bi < 0.5 > Na < 0.5 >) TiO < 3 >-0.75 Ba < 0.85 > Ca < 0.15 > Zr < 0.1 > Ti < 0.9 > O < 3 >]-xBaZrO < 3 >, and x is the mole number and ranges from 0.05 to 0.20. According to the preparation method disclosed by the invention, chemical component disorder is induced by doping modification on an atomic scale, and a high-dynamic-polarity nano micro-region (PNRs) is formed, so that the nano micro-region has an obvious dielectric relaxation behavior and a slender ferroelectric hysteresis loop (P-E ring), and the energy storage ceramic material with high energy storage density and energy storage efficiency, ultrahigh breakdown strength and excellent frequency stability is obtained.

The invention discloses a lead-free energy storage ceramic laminated material, and belongs to the technical field of dielectric energy storage. The lead-free energy storage ceramic laminated material is formed by sequentially laminating lead-free energy storage ceramic with a texture structure and lead-free energy storage ceramic with a non-texture structure, and preferably, the material comprises at least three layers; when the lead-free energy storage ceramic with the texture structure is positioned on the middle layer, the lead-free energy storage ceramic with the non-texture structure is positioned on the two sides of the middle layer; when the lead-free energy storage ceramic with the non-texture structure is located on the middle layer, the lead-free energy storage ceramic with the texture structure is located on the two sides of the middle layer. Based on the structural design of at least three layers, the non-textured ceramic is selected as the high-voltage-resistant layer, the textured ceramic is selected as the high-polarization layer, the lead-free ceramic laminated material with excellent energy storage performance is obtained, and the lead-free ceramic laminated material has wide application prospects in the fields of power electronics and pulse power.

The invention relates to the technical field of layered product materials, and discloses a polymer-ceramic composite dielectric material, a preparation method and application of the polymer-ceramic composite dielectric material to a capacitor. The preparation method of the polymer-ceramic composite dielectric material comprises the following steps: adding composite modified pullulan and modified composite nanosheets into N, N-dimethylformamide to obtain a mixed solution A, and casting to form a film to obtain an outer film; adding the composite modified pullulan and the modified ceramic-based composite filler into N, N-dimethylformamide to obtain a mixed solution B, and pouring to form a film to obtain an inner-layer film; and clamping the inner-layer film between the outer-layer films, carrying out hot press molding, and cooling to obtain the polymer-ceramic composite dielectric material with a three-layer structure. The polymer-ceramic composite dielectric material provided by the invention has good dielectric property, energy storage property and heat resistance, and can be applied to capacitors.

The invention discloses a high-temperature-resistant flame-retardant polyolefin cable material and a preparation process thereof, and belongs to the field of polyolefin cable materials and manufacturing thereof. The high-temperature-resistant flame-retardant polyolefin cable material is prepared from the following raw materials in parts by mass: 50 to 70 parts of polyolefin resin, 20 to 40 parts of cardanol grafted polyurethane, 10 to 25 parts of ionomer, 30 to 50 parts of composite flame retardant, 1 to 3 parts of lubricant and 0.2 to 1.2 parts of antioxidant, wherein the polyolefin resin is composed of isotactic polypropylene and multiphase co-polypropylene according to a mass ratio of 1: (0.1-0.2), the ionomer is an EMAA copolymer or an SEPS-g-MZn ionomer, and the composite flame retardant is composed of modified polypropylene, magnesium hydroxide and ammonium polyphosphate. The high-temperature-resistant flame-retardant polyolefin cable material provided by the invention does not need a crosslinking process, so that the production cost is saved, and the production efficiency and the quality are easy to control; meanwhile, the cable material has excellent mechanical strength, toughness, chemical corrosion resistance, high-temperature resistance, low-temperature impact resistance, direct-current breakdown strength and flame retardance, the product quality of the cable material is improved, and the service life of the cable material is prolonged.

The invention belongs to the technical field of paint, and discloses a preparation method and application of insulating paint. The preparation method comprises a raw material component A and a raw material component B, the raw material component A comprises the following components in parts by weight: 55-65 parts of epoxy resin, 10-20 parts of modified filler, 1-5 parts of dihydroxy polydimethylsiloxane, 1-10 parts of auxiliaries and 30-50 parts of water; the raw material component B comprises a curing agent; the preparation method of the modified filler comprises the following steps: mixing nano aluminum nitride, mica powder, glass fibers, sodium dodecyl benzene sulfonate and a solvent, then adding sorbitol, and stirring and dispersing to obtain the modified filler. A film layer formed by the insulating paint has high breakdown strength and good impact resistance at the same time, the breakdown strength is not lower than 161 KV / mm, and the impact resistance is not lower than 85 cm.

The invention discloses an aromatic amine epoxy resin curing agent, a design method thereof, insulating epoxy resin and a preparation method thereof, and belongs to the technical field of insulation. At least two benzene ring structures are designed, and the benzene ring structures are connected through functional bridge bonds; an amino functional group is arranged at each of two ends of the designed structure; the ortho-position of the designed amino functional group is not provided with a high-electron-withdrawing substituent group; the aromatic amine epoxy resin curing agent is obtained; and the functional bridge bond is arranged at a 1, 4 or 1, 3 substitution position of the benzene ring structure. Polyaromatic diamine is used as a curing agent component of the epoxy resin, and a rigid aromatic structure is introduced into an epoxy main chain to enhance the thermal stability of the epoxy main chain and increase the glass-transition temperature; functional bridge bonds are introduced between benzene rings to break the conjugated structure of the benzene rings, so that the electrical performance is improved. And the high-temperature-stability and high-resistance insulating epoxy resin for the high-voltage direct current can be prepared. And the electrical performance of a key insulating part in the direct-current GIS / GIL under the action of a high temperature gradient and a high electric field can be improved.

The invention provides an energy storage capacitor preparation method and an energy storage capacitor, and relates to the technical field of capacitors, and the method comprises the steps: pasting an SrTiO3 (STO) substrate on a heating support through silver glue, and then heating; the heating support is placed in a PLD cavity, air in the cavity is extracted, the pressure intensity in the PLD cavity is made to be lower than the first pressure intensity, the PLD cavity is heated, and the oxygen pressure is adjusted to be the first oxygen pressure; srRuO3 (SRO) is deposited in an oxygen atmosphere; the PLD cavity is cooled, the oxygen pressure is adjusted to be second oxygen pressure, and Pb < 0.97 > La < 0.02 > Zr < 1-x > Sn < x > O < 3 > (PLZS) is used as a target material for thin film deposition; and pattern transfer of the top electrode is carried out through photoetching, and Pt is plated on a thin film to serve as the top electrode. According to the invention, the saturation polarization time is delayed by designing the anti-ferroelectric nano-domain structure, so that the strain stress of anti-ferroelectric-ferroelectric phase change is slowly released, and the energy storage capacitor with large energy storage density is effectively generated.

The invention provides a polypropylene film for a new energy automobile capacitor and a preparation method of the polypropylene film, and relates to the technical field of capacitor manufacturing. The preparation method comprises the following steps: S100, preparing a base film from a raw material comprising polypropylene resin; s200, preparing steeping liquor from raw materials including titanium salt, terephthalic acid, isophthalic acid and ethylene glycol; and S300, soaking the base film in the impregnation liquid, dropwise adding hydrochloric acid into the impregnation liquid, and carrying out ultraviolet radiation to obtain the modified polypropylene film. According to the invention, the polypropylene film is modified by dipping and irradiation, so that the interface bonding strength between the polypropylene film and the metal coating is improved, and the breakdown strength of the polypropylene metallized film is improved.

The invention discloses a high-energy-storage-density anti-ferroelectric ceramic material and a preparation method thereof. The general chemical formula is (Pb < 0.98 > La < 0.02 >) (Zr < 0.7 > Sn < 0.3 >) < 0.995 > O < 3-x > wt% Al < 2 > O < 3 >, x is smaller than or equal to 0.7, Al2O3 is a sheet-shaped template, the Al2O3 sheet-shaped template is directionally arranged in the anti-ferroelectric ceramic material along the same direction through a tape casting preparation process, and the Al2O3 sheet-shaped template is regulated to be parallel to a test electrode through polishing and metal spraying on the upper surface and the lower surface parallel to the Al2O3 sheet-shaped template. According to the anti-ferroelectric ceramic material, the Al2O3 sheet-shaped template and the test electrode are arranged in parallel, so that the Al2O3 sheet-shaped template effectively disperses an applied electric field in the whole anti-ferroelectric ceramic material matrix, non-uniform distribution of a local electric field is reduced, improvement of the breakdown strength of the anti-ferroelectric ceramic material is facilitated, and the energy storage density of the anti-ferroelectric ceramic material is further improved.

The invention belongs to the technical field of dielectric materials, and discloses a silicon modified energy storage dielectric film and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a powdery polymer with an organic solvent to obtain a polymer solution according to a ratio that 0.15-0.2 kg of the polymer is added into each liter of the organic solvent; uniformly stirring and mixing tetraethyl silicate and the polymer solution according to a volume ratio of 1: (5000-50000) to obtain a mixed solution; and coating the mixed solution, and carrying out heat treatment and drying to obtain the silicon-modified energy storage dielectric film. According to the invention, a small amount of tetraethyl silicate is introduced into a polymer solution, stirring is carried out, so that tetraethyl silicate is slowly hydrolyzed to generate free silicon, and the free silicon connects a plurality of polymer single chains in the subsequent heat treatment process to realize cross-linking among different polymer single chains; and the motion space and the degree of freedom of a polymer molecular chain can be effectively reduced, so that the insulating property of the polymer can be effectively improved, and the breakdown strength is improved.

The invention relates to the technical field of preparation of insulating materials, in particular to a hydrophobic modified heterocyclic aramid-based insulating film, a preparation method and application. According to the method, a heterocyclic aramid polymer with high breakdown strength and high heat resistance is prepared to serve as a base material, hydrophobic long-chain alkane is grafted through active sites on imidazole of heterocyclic aramid, and the hydrophobic modified heterocyclic aramid-based insulating film is obtained. The heterocyclic aramid is endowed with hydrophobic performance on the basis of flame retardance, temperature resistance, excellent mechanical strength and high breakdown strength of the heterocyclic aramid, and the high-strength, high-modulus, heat-resistant and hydrophobic heterocyclic aramid-based insulating film is successfully prepared. The insulating property of the film is doubly enhanced under the action of imidazole in the film and the assistance of a surface hydrophobic function, and the method is simple and has important significance in application of the heterocyclic aramid insulating material in complex scenes. The problems of poor hydrophobicity and insulativity of a heterocyclic aramid film in the prior art are solved.

The present invention discloses a microcrystalline glass energy storage ceramic material for LTCC and a preparation method thereof, belonging to the technical field of electronic information ceramics. The material comprises the following raw materials in weight percentage: 2-5% alkaline earth metal oxide, 30-40% SrO, 20-40% SiO2, 5-10% Na2O and 20-30% Nb2O5; the preparation method comprises the following steps: (1) ball milling the raw materials after mixing, and drying to obtain a mixed powder; (2) melting the obtained mixed powder, then casting, annealing, and finally annealing and crystallizing to obtain. The present invention combines the traditional melting method with casting molding to prepare microcrystalline glass with high dielectric constant, high breakdown strength and high energy storage density. The preparation process is simple, the stability is good and the cost is low, it is suitable for mass production, and has industrial significance.

The invention discloses a high-performance composite capacitor base film and a preparation method thereof, the method comprising the following steps: step 1, mixing polyester masterbatch and composite reinforced modified particles to obtain an extrusion masterbatch; step 2, melt extrusion, cooling, and casting; step 3, preheating the cast sheet and performing longitudinal stretching; step 4, preheating, performing transverse stretching; step 5, shaping treatment, and finally cooling, winding, and trimming to obtain a high-performance composite capacitor base film. The invention adopts PEN and PET compound as polyester masterbatch, which can improve the mechanical strength and heat resistance of the base film. The composite reinforced modified particles in the invention adopt acid-modified carbon nanotubes and nano-SiO2 as the main reinforcing fillers, and compound nano-alumina and reduced carbon dots to form a special three-dimensional network structure, which can comprehensively improve the mechanical strength, heat resistance and oxidation resistance of the base film, improve the application effect of the base film, and extend its service life.

This invention relates to the field of electronic packaging substrates, and particularly to an alumina ceramic substrate material, its preparation method, and its application. The alumina ceramic substrate comprises 90-99 wt% alumina and 1-10 wt% sintering aids. The sintering aids have the following composition: xB₂O₃·zSiO₂·yBi₂O₃, where 15≦x≦25, 50≦y≦70, 15≦z≦25, and x+y+z=100, where x:y:z is the mass ratio. The density of the alumina ceramic substrate is ≥3.8 g / cm³. 3 The alumina ceramic substrate of this invention has the following characteristics: surface roughness ≤ 0.35 μm, breakdown strength ≥ 35 kV / mm, bending angle ≥ 350 MPa, and thermal conductivity ≥ 25 W / m·K. It also features high density, uniform microstructure, good surface flatness, high mechanical strength, high breakdown strength, low dielectric loss, and high thermal conductivity.

The invention discloses an X8R type high-reliability ceramic dielectric material with a double-shell design and a preparation method and application thereof, and belongs to the technical field of electronic ceramic materials. According to the ceramic dielectric material, barium titanate is used as a main body material, at least one of Y2O3 and Dy2O3 is used as a first dopant, and at least one of MgO and MnO2 is used as a second dopant. The preparation method comprises the following steps: pre-sintering BaTiO3 and a first doping agent at a high temperature; and then adding a second doping agent for secondary mixing and high-temperature sintering. According to the method, a double-shell structure of a tetragonal phase crystal nucleus, a rare earth-rich inner shell layer and an Mg / Mn-rich outer shell layer is constructed in ceramic crystal grains. The high dielectric property of the BaTiO3 crystal nucleus is reserved, the rare earth-rich inner shell layer is used for inhibiting oxygen vacancy long-range migration, the Mg / Mn-rich outer shell layer is used for optimizing temperature stability, synergistic improvement of the high dielectric constant (epsilon r gt, 2200), X8R wide-temperature stability (delta C / C 25 DEG C is smaller than or equal to + / -15%, minus 55-150 DEG C) and high breakdown field strength (larger than or equal to 6.7 kV / mm) is achieved, and the high-dielectric-temperature-stability high-voltage-resistant MLCC is suitable for manufacturing the high-dielectric-temperature-stability high-voltage-resistant MLCC.

The invention relates to a dielectric film for high-temperature energy storage and a preparation method and device thereof, the dielectric film is prepared through supercritical spraying film formation and heat treatment, and the dielectric film comprises the following components in parts by weight: 5-30 parts of a high-temperature-resistant polymer, 0.1-5 parts of an additive and 60-95 parts of a solvent; the high-temperature-resistant polymer is selected from one or more of a polyimide polymer and a precursor polyamide acid of the polyimide polymer; the additive is selected from one or more inorganic fillers of aluminum oxide, boehmite and silicon carbide. Compared with the prior art, the invention has the advantages of uniform thickness, strong breakdown resistance and high dielectric strength.

The application belongs to the technical field of electrical insulation materials and nanocomposite material preparation, and discloses a method for preparing aramid composite insulation film by sorting long halloysite nanotubes. In the method, the halloysite nanotube raw material is sorted by natural settlement in water to obtain long halloysite nanotubes, which are then compounded with aramid nanofibers, and the composite insulation film with a dense staggered layered structure is prepared through spray film forming, solvent replacement and heat pressing densification treatment. The obtained film has excellent mechanical properties, insulation properties and high-temperature stability, and is resistant to acid, alkali, salt and organic solvent corrosion, and has good moisture-proof characteristics after hydrophobic modification. The sorting process is green and environmentally friendly, does not require organic additives, has excellent comprehensive performance, and is suitable for high-end insulation fields such as dry-type transformers, new energy motors and aviation electrical appliances.

The invention discloses a polydopamine-modified boron nitride nanosheet / polyimide thermally conductive insulating composite film and a preparation method and application thereof. The preparation method comprises the following steps: adding a polydopamine-modified boron nitride nanosheet to a polyamic acid solution, stirring the reaction, and obtaining a polydopamine-modified boron nitride nanosheet / polyamic acid solution; using the polydopamine-modified boron nitride nanosheet / polyamic acid solution to prepare a polydopamine-modified boron nitride nanosheet / polyamic acid composite fiber felt; subjecting the polydopamine-modified boron nitride nanosheet / polyamic acid composite fiber felt to thermal imidization treatment to obtain a polydopamine-modified boron nitride nanosheet / polyimide thermally conductive composite fiber felt; and subjecting the polydopamine-modified boron nitride nanosheet / polyimide thermally conductive composite fiber felt to compression molding to obtain a polydopamine-modified boron nitride nanosheet / polyimide thermally conductive insulating composite film. The method is simple and reasonable in design, and the obtained film has good thermal conductivity.

The invention relates to a breakdown-resistant and aging-resistant power cable. A power cable has high anti-breakdown and anti-aging requirements, however, cable materials used at present, such as polyethylene, are poor in anti-aging capability. In order to solve the problem, the breakdown-resistant and aging-resistant power cable is invented, the breakdown-resistant and aging-resistant power cable is sequentially composed of a conductor, a conductor shielding layer, an insulating layer, a wrapping layer and a protective layer from inside to outside, and the conductor shielding layer is a composite shielding material composed of organic silicon, graphene and nano molybdenum dioxide. The organic silicon in the conductor shielding layer has good heat resistance and aging resistance; the graphene has good electric conduction and heat conduction performance, can shield electromagnetic waves, and can conduct heat out to reduce the temperature; the nano molybdenum dioxide can react with peroxide at high temperature, so that the degradation effect of the organic silicon resin is delayed, and the aging resistance of the cable can be effectively improved by combining the nano molybdenum dioxide, the peroxide and the organic silicon resin. The breakdown-resistant and aging-resistant power cable can be used in the fields of high-voltage power cables and the like.

The invention relates to the technical field of energy storage, and provides a preparation method of high-breakdown-resistance fluorine-containing aromatic polythiourea aiming at the problems of low dielectric constant, low breakdown-resistance strength, large energy loss and the like of a full-flexible polymer film, the preparation method comprises the following steps: firstly, carrying out microwave polymerization on 2, 2-bis (3-amino-4-hydroxyphenyl)-hexafluoropropane (BAHHHFP) and thiourea; a high-molecular F-ArPTU dielectric polymer is prepared; performing vacuum drying to obtain a product F-ArPTU powder; the product is prepared into a dielectric polymer film for testing and verifying the breakdown resistance and the energy storage performance of the dielectric polymer film. The method is simple and efficient in path, and the prepared polymer can be applied to flexible film capacitors.

The application relates to the technical field of prefabricated cable joint, in particular to a prefabricated positive and negative tooth type cable joint which comprises a prefabricated cable intermediate joint, two cables butted at two ends of the prefabricated cable intermediate joint, a protection mechanism arranged outside the prefabricated cable intermediate joint, a gas storage mechanism mounted on the protection mechanism and a sealing monitoring structure mounted on the protection mechanism. Two cable sheaths symmetrically distributed are additionally arranged on two independent cable segments after being cut off, when the prefabricated cable intermediate joint is butted with two cable line heads and wrapped, rotation of multiple bidirectional screws drives the extrusion pad slide way until the anti-debonding pad forcibly seals the two cables, after the sealing shell is assembled with the two cable sheaths, the gas storage mechanism assembled on the sealing cover shell can provide gas protection for the wrapped part, so that environmental moisture invasion into the wrapped part is effectively avoided.

The invention discloses a barium titanate-based ceramic material and a preparation method thereof, the chemical formula of the barium titanate-based ceramic material is (1-x) (Ba1-yCay-zSrz) TiO3-xBi (Mg0. 5Zr0. 5) O3, wherein x is greater than or equal to 0.20 and less than or equal to 0.25, y is greater than or equal to 0.2 and less than or equal to 0.25, and z is greater than or equal to 0 and less than or equal to 0.05. The barium titanate-based ceramic material disclosed by the invention has a wider temperature interval, the capacitance value change is less than 15% in the interval from-55 DEG C to 200 DEG C, the characteristic of X9R can be achieved, meanwhile, the dielectric loss can be controlled to be 0.9% or below, and the barium titanate-based ceramic material is suitable for preparing capacitors in high-temperature application scenes and has a wide application prospect.

The application discloses a full-organic polymer dielectric film with a five-layer structure and a preparation method thereof. The dielectric film comprises five-layer films; the five-layer films comprise two low-loss high-breakdown layer films located at the outermost layers, two intermediate transition layer films arranged between the two low-loss high-breakdown layer films, and a high-dielectric layer film arranged between the two intermediate transition layer films; and the full-organic polymer dielectric film is prepared by bonding the five-layer films in a continuous hot-pressing process. The organic polymers with different properties are combined together by the method of multi-layer continuous hot-pressing, so that the advantages of each component can be fully exerted, the growth of the electric tree branches is inhibited by the differences between the layers of different components, and the breakdown strength is improved. The full-organic composite film has the advantages of high dielectric constant, high breakdown field strength and high discharge energy density.

The invention discloses a preparation method of an interlayer cross-linked polyimide three-layer composite film. The preparation method comprises the following steps: preparing a solution A, a solution B and a solution C; adjusting the insertion height of a scraper to be 30 [mu] m, blade-coating a glass plate with the solution A, carrying out vacuum defoaming, drying at 60 DEG C for 1 h, and removing the solvent to obtain a bottom layer PAA film; the insertion height of a scraper is adjusted to be 20 microns, the solution C is scraped and coated on one layer, drying is conducted for 0.5 h in vacuum at the temperature of 60 DEG C, and the solvent is removed for standby application; adjusting the insertion height of a scraper to be 30 microns, blade-coating a glass plate with the solution B, carrying out vacuum defoaming, drying at 60 DEG C for 1 hour, and removing the solvent to obtain a middle layer PAA film; the top layer PAA film is obtained after the step S3 and the step S2 are repeated, and the PAA film is subjected to vacuum thermal imidization, according to the polyimide three-layer composite film produced through the method, the problem that interlayer interface compatibility is poor is effectively solved, and meanwhile the dielectric constant and the breakdown strength of the polyimide film are improved.

The invention provides a high-energy-storage-density polypropylene-based nano composite film. The high-energy-storage-density polypropylene-based nano composite film is prepared from polypropylene-boron nitride composite particles and PCOE (at) PMMA (at) BaTiO3 double-shell structure nano particles through tape casting, irradiation and stretching. The composite film provided by the invention has high dielectric property and energy storage density. According to the invention, a quantifiable high-performance dielectric solution is provided for high-power application scenarios such as an electric vehicle inverter and pulse power equipment.

The invention relates to a high-dielectric high-breakdown-strength electrostatic chuck and a preparation method thereof. The electrostatic chuck comprises a ceramic dielectric layer, a bonding layer and a metal base which are sequentially arranged from top to bottom, the ceramic dielectric layer comprises at least one ceramic dielectric layer, and raw materials of the ceramic dielectric layer comprise at least one of aluminum oxide and aluminum nitride and at least one of barium titanate, barium zirconate titanate, lead magnesium niobate and barium strontium titanate. According to the electrostatic chuck, the electrostatic adsorption technology is utilized, efficient electrostatic adsorption is achieved through a high-dielectric-constant ceramic dielectric layer material, and the high-dielectric-constant material can effectively store charges, so that the electrostatic adsorption force is enhanced, and workpieces such as wafers and the like keep better stability and precision in the machining process; and the ceramic dielectric layer material has high breakdown strength, so that the working safety of the electrostatic chuck in a high-voltage environment can be ensured. The preparation method is convenient to control, high in production efficiency and beneficial to large-scale production.

The invention discloses a dielectric film based on dielectric graphene coating modification, and belongs to the technical field of films. The core is a composite structure of a'graphene core-double-layer dielectric shell layer 'core-shell filler and a polymer matrix, the oxygen content of the graphene core is 5-8 at%, the sheet diameter is 50-200 nm, and the high polarization characteristic is reserved; the inner layer of the double-layer shell layer is a high-dielectric oxide, the outer layer is a high-insulation oxide, and the total thickness is 3-10nm; a core-shell filler is prepared through a sol-gel + ALD fine trimming process, and the core-shell filler is compounded with matrixes such as PVDF / PI and the like to form a film with the filling amount of 2-8 wt%; according to the design, electron tunneling is blocked, electric field distortion is corrected, and performance synergy is achieved, wherein the dielectric constant is larger than or equal to 21.5, the breakdown strength is larger than or equal to 402 kV / mm, the dielectric loss is smaller than or equal to 0.017, the tensile strength is larger than or equal to 56.9 MPa, and the energy density is 12-15 J / cm < 3 >. The contradiction between dielectric enhancement and loss and breakdown strength of a traditional composite material is solved, the method is suitable for high-density energy storage devices, flexible electronic devices and the like, and the technology is compatible with large-scale production.

The application discloses a corona-resistant polyurethane composite insulating material and a preparation method thereof, and belongs to the technical field of insulating materials. A one-dimensional titanium dioxide whisker is constructed on the surface of mica through an in-situ growth technology to form a three-dimensional skeleton with sheet-line interweaving. The structure not only effectively prevents the stacking and agglomeration of mica sheets in space, significantly improving the dispersion uniformity of the filler in the resin matrix, but also connects isolated mica sheets into a complete insulating network through the bridging effect of the one-dimensional whisker, greatly enhancing the hindering ability of charge migration. Meanwhile, the interface between the titanium dioxide whisker and the mica sheet is combined through chemical bonding, avoiding interface gaps and defects caused by simple physical mixing, and further improving the breakdown strength and corona-resistant starting voltage of the material.

The invention belongs to the technical field of ceramic capacitor materials, and particularly relates to a combined-wave ceramic capacitor material and a preparation method thereof. The preparation method of the ceramic capacitor material provided by the invention comprises the following steps: mixing barium titanate, yttrium oxide, cerium oxide, manganese oxide, calcium oxide, acidic silica sol and water, and carrying out ball milling and drying; grinding and crushing the primary mixture, mixing with alkaline silica sol and water, and carrying out ball milling and drying; grinding and crushing the secondary mixture, and sintering for the first time; grinding and crushing the primary sinter, then adding absolute ethyl alcohol for ball milling, drying, grinding and crushing; mixing the ball-milled mixture with a binder, granulating, and carrying out compression molding to obtain a ceramic green body; and carrying out heat preservation on the ceramic green body, and then carrying out secondary sintering to obtain the ceramic capacitor material. According to the ceramic capacitor material prepared by the preparation method provided by the invention, the breakdown strength of the material can be effectively improved, and the dielectric loss of the material is reduced.

The invention provides an all-organic fluorine-containing elastomer for a high-energy-density capacitor and a preparation method of the all-organic fluorine-containing elastomer, and belongs to the field of capacitor materials. According to the invention, peroxide vulcanized fluororubber is used as a rubber phase, a polyvinylidene fluoride-hexafluoropropylene copolymer is used as a plastic phase, and the full-organic fluorine-containing elastomer for the high-energy-density capacitor is prepared by using a dynamic vulcanization technology. The all-organic fluorine-containing elastomer has the advantages of high discharge energy density, low energy loss and remarkable discharge efficiency. Compared with a chemical modification or physical blending mode, the dynamic vulcanization adopted by the invention is an effective method for more simply and conveniently regulating the ferroelectric behavior of the dielectric material and improving the energy storage density and the discharge efficiency of the ferroelectric material, and the prepared all-organic fluorine-containing elastomer has a wide application prospect in the aspect of preparing capacitor materials.