26results about How to "High volume resistivity" patented technology

The invention relates to the technical field of photovoltaic packaging materials, in particular to a packaging composite material, a preparation method thereof and a perovskite battery assembly. The packaging composite material is prepared from 5 to 25 parts of first EVA (Ethylene Vinyl Acetate) resin, 20 to 50 parts of second EVA resin, 5 to 20 parts of ethylene-acrylic acid copolymer, 10 to 30 parts of compound compatilizer, 1 to 10 parts of silane coupling agent, 0.05 to 0.5 part of modified inorganic filler and 0.05 to 0.5 part of antioxidant, the compound compatilizer is prepared from short-chain siloxane modified EVA resin, long-chain siloxane modified EVA resin and EBA resin according to the mass ratio of (5 to 30) to (5 to 40) to (1 to 15). The packaging composite material disclosed by the invention has good adhesive property, electrical property, damp heat resistance, ultraviolet aging resistance and low creep property, and meets the low-temperature packaging process requirements of the perovskite battery assembly.

The present invention relates to the technical field of solar encapsulation films, and provides a heat-conductive composite encapsulation film and a photovoltaic module. The heat-conductive composite encapsulation film is a composite encapsulation film after pre-crosslinking treatment, comprising a phase-change heat storage adhesive layer in contact with a solar cell sheet, a nano silver wire layer, and a heat-conductive adhesive layer in contact with a photovoltaic back plate or a front plate; the phase-change heat storage adhesive layer comprises a first resin and a phase-change heat storage material, the phase-change heat storage material is a paraffin microcapsule, and the addition amount thereof is 20-30% of the mass of the first resin; the heat-conductive adhesive layer comprises a second resin and a heat-conductive material, and the addition amount of the heat-conductive material is 10%-30% of the mass of the second resin; the first resin and the second resin are both EVA resins. The heat-conductive composite encapsulation film can effectively avoid the problems of reduced insulation and wet leakage performance and delamination caused by existing adhesive films in photovoltaic modules, and the heat storage and rapid heat conduction performance are effectively improved, and efficient cooling can be achieved, thereby improving the power generation and reliability of photovoltaic modules.

The invention discloses an underground heater insulating material capable of improving the insulating property through zirconium doping and a preparation method thereof. The insulating material is an insulating ceramic material prepared from a mixed material containing magnesium oxide, a doping material containing a zirconium element and a modifying reagent through ball milling, drying granulation, aging forming and plastic removal sintering. As the doped material containing the zirconium element and magnesium oxide can form a solid solution, crystal lattices of magnesium oxide crystals are activated, the compact degree and strength of the material are improved, and the insulating property is improved; the modification reagent reduces the vacancy defect of MgO crystal grains, moisture absorption is not easy to form an MgO-OH structure, and the volume resistivity is improved; compared with a high-purity magnesium oxide ceramic material, the prepared insulating ceramic material has good high-temperature insulating property and can be used as an insulating material for an underground high-power heater.

The invention discloses an underground heater insulating material capable of improving the insulating property through manganese doping and a preparation method thereof. The insulating material is an insulating ceramic material prepared from a mixed material containing magnesium oxide, a doping material containing a manganese element and a modifying reagent through ball milling, drying granulation, aging forming and plastic removal sintering. The doping material containing the manganese element and magnesium oxide can form a solid solution, so that crystal lattices of magnesium oxide crystals are activated, the compact degree and strength of the material are improved, and the insulating property is improved; the modification reagent reduces the vacancy defect of MgO crystal grains, moisture absorption is not easy to form an MgO-OH structure, and the volume resistivity is improved; compared with a high-purity magnesium oxide ceramic material, the prepared insulating ceramic material has good high-temperature insulating property and can be used as an insulating material for an underground high-power heater.

This invention relates to the field of insulating aluminum busbar technology, and in particular to an insulating aluminum busbar for high-voltage connection in a power battery system, its preparation method, and its application. An insulating aluminum busbar for high-voltage connection in a power battery system includes: a three-dimensionally bent aluminum alloy substrate; a ceramic insulating layer, which covers the outer surface of the three-dimensionally bent aluminum alloy substrate and is metallurgically bonded to it; and two conductive ends, which are located at both ends of the three-dimensionally bent aluminum alloy substrate, with a nickel sheet fixedly connected to each conductive end and covered with a heat-shrink tubing. This application achieves metallurgical bonding between the ceramic insulating layer and the aluminum substrate, resulting in extremely strong bonding and solving the problem of coating peeling. The two conductive ends located at both ends of the substrate ensure the conductivity of the high-voltage connection and provide secondary protection for the welded area through the heat-shrink tubing, improving connection reliability.

This application relates to the field of sealing materials, specifically disclosing an insulating sealing gasket for nuclear power equipment and its preparation method. The insulating sealing gasket for nuclear power equipment of this application comprises an outer layer material and an inner layer material, with the outer layer material covering the surface of the inner layer material. The outer layer material is composed of the following components by mass percentage: 50%-60% silane coupling agent modified phenolic resin, 35%-45% composite fiber, and 3%-5% epoxy functionalized silane bonding accelerator. The inner layer material is composed of the following components by mass percentage: 45%-55% fluorine-modified epoxy resin, 30%-40% polyimide fiber, and 10%-20% high-temperature resistant nano-reinforced microspheres. The insulating sealing gasket for nuclear power equipment of this application has the advantages of high pressure resistance and high temperature resistance.

The utility model relates to the technical field of novel ceramic insulated steel rails with columnar stress points, and discloses a novel ceramic insulated steel rail with columnar stress points, which is characterized in that the stress points of a first ceramic column and a second ceramic column in the prior art are changed, and an original ball-shaped limiting hole is changed into a ball plane type, so that the connected steel rail can be prevented from being damaged; an adhesion layer and an insulating layer are arranged on the outer wall of a first ceramic column and the outer wall of a second ceramic column, the adhesion layer is coated on the surface of a steel rail, and at least one insulating layer is coated on the surface of the adhesion layer; the thickness of the adhesion layer is not more than 200 microns, the thickness of each insulating layer is not more than 200 microns, the high-temperature-resistant and wear-resistant ceramic insulating paint can form a ceramic coating which has higher volume resistivity, can bear a stronger electric field and is not broken down on the surface of a coated object, and the coating has higher mechanical strength and good chemical stability, can resist aging, and can be applied to the surface of an object to be coated with the high-temperature-resistant and wear-resistant ceramic insulating paint. And water resistance and chemical corrosion resistance are realized.

The invention relates to the technical field of inorganic non-metal insulating materials, in particular to an insulating material resistant to high voltage breakdown at high temperature and a preparation method thereof.The preparation method comprises the steps of raw material pretreatment and homogeneous mixing, forming and low-temperature pre-sintering, high-temperature densification sintering, gradient cooling annealing and finish machining. By optimizing the combination of the base material, the reinforcing phase material and the functional modifier, the insulating material has excellent high voltage breakdown resistance and high volume resistivity in a high-temperature environment, and the reliability and stability of the material under extreme conditions are ensured; by adopting the preparation method, high densification and microstructure optimization of the material are realized, so that the mechanical strength and electrical performance consistency of the insulating material are improved.

The invention discloses low-viscosity electrical insulating oil and a preparation method thereof, and relates to the technical field of insulating oil, and the low-viscosity electrical insulating oil is prepared from the following raw materials in parts by weight: 80-90 parts of base oil, 0.1-5 parts of an antioxidant, 1-8 parts of oleic acid coated inorganic heat-conducting particles and 1-8 parts of a viscosity modifier. According to the method disclosed by the invention, the problem of high viscosity of the insulating oil at low temperature caused by separation of the crystals is effectively reduced by carrying out breaking treatment on non-uniform and irregular crystals separated from the freezing points of the high-melting-point glyceride and wax in the base oil through ultrasonic waves. In addition, the super-hydrophilic adsorbent is adopted for adsorption treatment of the insulating oil, polar molecules of the insulating oil are greatly reduced, and therefore the volume resistivity of the insulating oil is improved. In addition, the oleic acid-coated inorganic heat-conducting particles are added, so that the heat conduction rate of the insulating oil can be increased, and the performance of electrical equipment is improved.

The invention discloses a protective coating for the surface of an electronic component and a preparation method thereof, and relates to the technical field of coatings. The coating is prepared from the following raw materials in parts by mass: 100 parts of epoxy modified acrylate copolymer, 8 to 9 parts of butyl acetate, 6 to 7 parts of propylene glycol methyl ether acetate, 6 to 7 parts of isododecane, 4 to 6 parts of modified boron nitride nanotube, 3 to 5 parts of synergist, 0.2 to 0.4 part of 2-methylimidazole, 0.1 to 0.3 part of defoaming agent, 0.2 to 0.4 part of flatting agent and 0.1 to 0.3 part of sterilizing agent. The epoxy modified acrylate copolymer, the modified boron nitride nanotube, the synergist and other components are introduced, so that the adhesive force, impact resistance, wear resistance, weather resistance, aging resistance, dielectric strength, volume resistivity and high-frequency signal adaptability of the protective coating are effectively improved while the weldability of a lead of an electronic component is not affected. Therefore, the method has a wider application prospect.

The invention relates to the technical field of iron-silicon magnetic powder inductance processing, in particular to an iron-silicon magnetic powder inductance material and a preparation method thereof.The iron-silicon magnetic powder inductance material is prepared from, by weight, iron-silicon alloy, a composite insulation coating agent, a surfactant, ferric nitrate, citric acid and an adhesive solution; the preparation method comprises the following steps: ultrasonically dispersing phosphate and n-type semiconductor oxide nano powder in ethanol, adding a silane coupling agent, adjusting the pH value to 4.0-5.5, reacting at 60-80 DEG C for 2-4 hours, filtering and drying to obtain the composite insulating coating agent, the iron-silicon magnetic powder inductance material prepared through the method solves the key technical problems that iron-silicon magnetic powder is large in loss, low in magnetic conductivity and poor in design flexibility, the high-frequency performance and reliability are improved, and the urgent requirements for high frequency, miniaturization and high efficiency of power inductors in the fields of consumer electronics, new energy automobiles, 5G communication and the like are met.

The invention discloses a polypropylene cable material as well as a preparation method and application thereof, and relates to the technical field of wire and cable materials. The invention provides a polypropylene cable material. The polypropylene cable material is prepared from the following components in parts by weight: 25 to 45 parts of homo-polypropylene, 25 to 45 parts of co-polypropylene, 25 to 45 parts of ethylene-octylene copolymer, 1 to 3 parts of modified TiO2-ZnO composite nanoparticles and 0.1 to 8 parts of auxiliaries. The modified TiO2-ZnO composite nano particles are self-made products, and by using the modified TiO2-ZnO composite nano particles, the dispersity of the TiO2-ZnO nano particles in a matrix can be greatly enhanced, the compatibility of the matrix and the nano particles in a composite material system is improved, and the composite material can be used for preparing a composite material. Therefore, the prepared polypropylene cable material has high insulating property, dielectric property and strong breakdown field.

The invention discloses an underground high-power heater insulating material and a preparation method thereof. The insulating material is an insulating ceramic material prepared from a mixed material comprising magnesium oxide, a doping material containing a manganese element, a doping material containing a zirconium element and a modifying reagent through ball milling, drying granulation, aging forming and plastic removal sintering. The doping material containing the manganese element and the doping material containing the zirconium element can form a solid solution with magnesium oxide, so that crystal lattices of magnesium oxide crystals are activated, the compact degree and the strength of the material are improved, and the insulating property is improved; the modification reagent reduces the vacancy defect of MgO crystal grains, moisture absorption is not easy to form an MgO-OH structure, and the volume resistivity is improved; the prepared insulating ceramic material has good high-temperature insulating property and can be used as an insulating material for an underground high-power heater.

This invention belongs to the field of ceramic materials technology and discloses a high-temperature, high-insulation 96 alumina ceramic and its preparation method. The material is made by mixing α-Al₂O₃ powder with a dopant, wherein the dopant is composed of TiO₂ and CaO mixed in a mass ratio of (1-3):(3-1). Its average volume resistivity at room temperature is higher than 10 Ω·cm. 15 The optimal component insulation resistivity can reach 1.75 × 10⁻⁶ Ω·cm at a high temperature of 500°C. 12 The preparation method involves mixing α-Al₂O₃ powder with dopants TiO₂ and CaO according to their doping content; mixing the raw material powder with anhydrous ethanol and then ball-milling; drying and sieving the ball-milled slurry; adding a binder to the obtained powder, sieving it again, granulating it, and pressing it into a green body; firing the green body after debinding to obtain the final ceramic sample. This invention utilizes Ca... 2+ Ti 4+ By doping and modifying the material, 96 alumina ceramics that meet the properties of coulombic electrostatic chucks were prepared. While reducing the sintering temperature, the resistivity was maintained, thus better meeting the practical application requirements.

The invention belongs to the technical field of photovoltaic module packaging materials, and particularly relates to PVB (polyvinyl butyral) resin and a PVB film for packaging a solar photovoltaic module as well as a preparation method and application of the PVB resin and the PVB film. The preparation method of the PVB resin comprises the following steps: adding an emulsifier, hydrochloric acid and n-butyraldehyde dissolved with an antioxidant into a PVA solution, carrying out a condensation reaction, adjusting the pH value to 3.8-4.1, adding water at 40-45 DEG C for washing until the pH value is neutral, and drying to obtain the PVB resin. According to the PVB resin provided by the invention, alkali liquor is not added in the washing stage, the PVB resin has extremely low metal ion content, the prepared PVB film for packaging the solar photovoltaic module is high in volume resistivity, high in transparency and good in weather resistance, long-time and high-efficiency operation of the photovoltaic module can be ensured, and the PVB film is good in mechanical property, moderate in hardness, large in tensile strength and good in weather resistance. The application requirements in the solar photovoltaic field are met, and the application prospect is good.

The preparation method comprises the following steps: carrying out prepolymerization reaction on a hydroxyl-containing elastic polymer, a liquid aryl diisocyanate prepolymer, modified epoxy-acrylic resin and a catalyst in an inert atmosphere to obtain a precursor mixture; the preparation method comprises the following steps: sequentially carrying out silane coupling treatment and boron nitride coating treatment on multi-particle-size spherical aluminum oxide to obtain surface-functionalized composite powder; mixing a reactive diluent, a plasticizer, a dispersing agent and a defoaming agent, then adding the composite powder, and carrying out shear dispersion and defoaming treatment to prepare high-solid-content filler slurry with thixotropy; the precursor mixture and the high-solid-content filler slurry are mixed according to a preset proportion, and pouring sealant slurry is obtained; the pouring sealant slurry is injected into a mold to construct a heat-conducting passage, and then is cured and shaped, so that the pouring sealant material with high heat conductivity, good electrical insulating property and stability is provided.

This invention relates to the field of coating technology, specifically to a polyurethane topcoat for energy storage boxes that resists electrical aging and its preparation method. This invention utilizes the synergistic compounding of three functional fillers—mica powder, nano-zinc oxide, and barium sulfate—to form a multi-level barrier system within the coating, significantly improving volume resistivity, arc resistance, and corona aging resistance. All three are indispensable. Simultaneously, functional aluminum hydroxide, after hydrophobic treatment, maintains low hygroscopicity even in humid and hot environments, preventing insulation degradation due to moisture absorption, while also providing flame retardant and smoke suppression functions. The compounding of amine light stabilizers and antioxidants effectively resists ultraviolet aging and thermo-oxidative aging, ensuring an electrical performance retention rate of ≥85% after long-term outdoor use. Furthermore, hollow glass microspheres reduce coating density, facilitating the lightweighting of the energy storage box; they also form a heat insulation layer, reducing external heat transfer and contributing to energy-saving temperature control within the box.

This invention discloses an equipment insulation coating process based on live cleaning pretreatment, belonging to the field of power equipment curing coating technology. The process includes: preparing a live cleaning solution, spraying and drying the equipment surface; preparing a silane-side group-containing acrylate copolymer solution and controlling its hydrolysis; adding nano-alumina and polyvinyl alcohol to obtain a primer and spraying and curing it to form a base coat; preparing a composite filler by surface organic modification of hexagonal boron nitride and nano-silica with a silane coupling agent; mixing and grinding this filler with epoxy resin, thixotropic agent, curing agent, etc., to obtain an insulating coating; and applying this filler to the base coat and curing it through stepped temperature increases to obtain an insulating coating. This invention enhances adhesion through cleaning activation, chemical anchoring, and nano-pinning synergistically, and improves insulation by utilizing the orientation barrier and defect filling of the composite filler, while an anti-settling system ensures the uniformity and stability of the coating.

The invention discloses a self-sensing insulating material based on graphene gradient distribution and a preparation method, and belongs to the technical field of functional composite materials. The material is composed of an insulating polymer matrix and graphene dispersed in the insulating polymer matrix, and the core of the material is that the concentration of the graphene is in non-uniform gradient distribution along the thickness direction of the material, so that the material can sense the stress, strain or aging state through the resistance change of the material while maintaining the excellent insulating property. The preparation method comprises the following steps: preparing dispersion liquids with different graphene concentrations; constructing a gradient structure by adopting a layer-by-layer tape casting or gradient centrifugal sedimentation technology; and carrying out curing molding. The material provided by the invention realizes integration of insulation and sensing functions, can realize real-time and in-situ monitoring of the state of electrical equipment without an external sensor, and has the characteristics of high sensitivity, good reliability and long service life.

The invention discloses an ethylene and alpha-olefin multipolymer, relates to the technical field of olefin polymerization, and in particular relates to an ethylene and alpha-olefin multipolymer as well as a preparation method and application thereof, the haze of the ethylene and alpha-olefin multipolymer is 1-7%, and the light transmittance is gt; the volume resistivity is gt; the molecular weight is 5.0 * 10 < 17 > omega.cm, the weight-average molecular weight is 70000-130000, and the crystallinity is 15%-35%; the method comprises the following steps: controlling the ratio of the mass flow rate of a liquid phase material A entering a fluidized bed reactor to the mass flow rate of circulating gas, and controlling the molar ratio of 1-butene / ethylene, the molar ratio of 1-hexene / ethylene, the molar ratio of 1-octene / ethylene, the molar ratio of a molecular weight regulator / ethylene, the molar content of an inert condensing agent and the injection position of the liquid phase material A in the circulating gas; the ethylene and alpha-olefin multipolymer with low haze, high light transmittance and high volume resistivity is obtained.

The invention relates to the technical field of materials, and discloses a high-voltage vacuum insulation part material and a preparation method thereof.The high-voltage vacuum insulation part material is prepared by taking PA66 as a matrix and assisting with a modified fiber material and the like through mixing and melt extrusion processes, and hyperbranched polymer molecular chains are modified on the surfaces of mullite fibers, so that the high-voltage vacuum insulation part material is obtained. The prepared modified fiber material can generate hydrogen-bond interaction with a PA66 molecular chain in a melting process, further entangled with the PA66 molecular chain and extend into each area of a PA66 matrix to form an interwoven miniature three-dimensional network structure, so that the mullite fiber can efficiently play a role in transmitting a load, the mechanical property of the PA66 is enhanced, and the service life of the mullite fiber is prolonged. A hyperbranched molecular chain on the surface of the mullite fiber contains a rigid chain link, so that the defect of PA66 serving as a straight-chain molecule is overcome, and the mechanical property of the mullite fiber is further improved.

The invention discloses high-strength electrical epoxy resin and a preparation method thereof in the technical field of epoxy resin. The high-strength electrical epoxy resin comprises the following components in parts by weight: 30-50 parts of bisphenol F epoxy resin, 50-70 parts of bisphenol A epoxy resin, 15-25 parts of a functionalized epoxy monomer, 30-40 parts of a hyperbranched curing agent, 5-8 parts of a reactive diluent, 0.5-1 part of an antioxidant, 10-15 parts of aluminum hydroxide and 1-2 parts of a silane coupling reagent. By introducing the functionalized epoxy monomer and the hyperbranched curing agent, the technical effects of remarkably improving the tensile strength of the epoxy resin, improving the interfacial compatibility of the inorganic filler and the resin matrix, increasing the volume resistivity and reducing the dielectric loss are achieved.

The invention relates to the technical field of power cables, in particular to a PVC cable material and a preparation method thereof. The PVC cable material comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 28-35 parts of silica powder, 50 parts of a plasticizer, 6 parts of a stabilizer and 0.5-3 parts of an auxiliary agent. According to the PVC cable material, the silica powder is adopted as the filler, compared with calcium powder, the silica powder has the advantages of being resistant to acid and alkali corrosion, good in insulativity, good in chemical stability, good in fire resistance and the like, the volume resistivity of the cable material is increased by one order of magnitude, and the insulating performance is greatly improved.

The application discloses a composite heat insulation structure suitable for radio frequency sealing and plasma ablation, and relates to the field of electrosurgical instruments. The composite heat insulation structure is arranged in a non-working area of a surgical clamp and is used for limiting heat diffusion and non-target conduction in a multi-energy working condition. The composite heat insulation structure comprises a first functional layer and a second functional layer. The first functional layer is arranged outside a metal base of the surgical clamp and is used for limiting heat and current diffusion to the non-working area in a radio frequency sealing working condition. The second functional layer is arranged outside the first functional layer and is used for improving the electrical insulation stability in a wet environment in a plasma ablation working condition. The composite heat insulation structure is designed in layers and is matched with differentiated functional layers, and is specifically adapted to different working condition requirements of radio frequency sealing and plasma ablation, so that the pain point that a single structure cannot simultaneously consider high-temperature heat insulation and wet-state insulation is effectively solved.

The invention discloses an EVA graphene composite film and a preparation method thereof, and belongs to the technical field of functional polymer composite materials. The preparation method comprises the following steps: adding organic amine into a graphene oxide dispersion liquid, reacting for a period of time, washing, and drying to obtain the modified graphene oxide. Organic matter intercalation is used for modifying titanate to obtain modified titanate. EVA, graphene and the modified titanate are mixed and subjected to hot pressing to form a film, and the EVA graphene outer film is obtained. Feeding EVA, the modified graphene oxide and an initiator into an open mill for coarse mixing; after open milling is completed, the mixture is put into a double-screw extruder to be subjected to blending extrusion and then subjected to hot pressing to form a film, and the EVA graphene inner film is obtained. And sequentially overlapping the EVA graphene outer film, the EVA graphene inner film and the EVA graphene outer film, and carrying out hot-pressing compounding to obtain the EVA graphene composite film. The composite film obtained by the preparation method has water vapor resistance and electricity resistance.