31 results about "Polymer insulation" patented technology

Described herein are devices for applying an alternating electric field to a living subject or an in vitro medium at a frequency between 100 kHz and 500 kHz. Also described herein are methods of using the described devices for applying an AC electric field to a target region comprising rapidly dividing cells, e.g., cells associated with a variety of disorders or conditions. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

The application discloses a space charge distribution calculation method based on tunneling effect and hole extraction restriction, and belongs to the technical field of electrical engineering, and comprises the following steps: a one-dimensional finite element structure model is established, taking polymer material as a main body and electrodes as boundaries; a periodic polarity reversal voltage is applied at the electrode boundary by coupling Maxwell electromagnetic field theory and Nernst-Planck theory, and a recombination carrier injection model and a hole extraction restricted boundary condition are introduced, so that a polymer material space charge distribution model based on tunneling effect and hole extraction restriction mechanism is obtained; and the polymer material space charge distribution model is solved to obtain the space charge distribution and electric field distortion law of the polymer material under the conditions of strong electric field and polarity reversal. The method solves the problem that the existing space charge model cannot effectively depict the tunneling emission and hole extraction restriction effect at the electrode interface, and provides important support for the polymer insulation aging research under the conditions of strong electric field and polarity reversal.

This invention discloses a method and system for predicting the carrier mobility of polymer insulating materials. The method includes the following steps: obtaining an amorphous polymer insulating molecular dynamics model; calculating the recombination energy and free energy difference parameters of each polymer molecule; calculating the charge transfer integral parameters between each pair of adjacent polymer molecules; calculating the electron and hole transfer rates between each pair of adjacent polymer molecules according to classical Marcus theory; performing a dynamic Monte Carlo simulation on the polymer insulating molecular dynamics model, and calculating the carrier mobility of the polymer insulating material based on the obtained electron and hole transfer rates between adjacent polymer molecules. This invention solves the technical problems of existing technologies, such as susceptibility to external interference, the need for precision instruments, high testing costs, and the inability to distinguish the contributions of electrons and holes to mobility.

Described herein are devices for applying an alternating electric field to a living subject or an in vitro medium at a frequency between 100 kHz and 500 kHz. Also described herein are methods of using the described devices for applying an AC electric field to a target region comprising rapidly dividing cells, e.g., cells associated with a variety of disorders or conditions. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

Exemplary semiconductor processing chambers may include a chamber body defining a substrate processing region. The chambers may include a substrate support positioned within the substrate processing region. The substrate support may include a ceramic or polymeric insulator plate positioned between a cathode assembly and an electrostatic chuck assembly. The chambers may include an acoustic emission probe in contact with the insulator plate of the substrate support.

The invention discloses a direct-current cable factory joint insulation interface space charge suppression method based on electric field induction, and belongs to the technical field of cable insulation. The method comprises the following steps: heating a polymer insulating material to a molten state, injecting the polymer insulating material into a mold and pouring the polymer insulating material on an insulating surface of a cable body; an external electric field of 0.1-2 kV / mm is applied in the process of recovering insulation formation, and cooling is conducted at the speed of 0.1-10 DEG C / min after heat preservation induction; and when the temperature of the mold is reduced to 25-50 DEG C, the electric field is removed, and the factory joint with the interface space charge suppression performance is formed. The invention also relates to a direct-current cable factory joint structure prepared by adopting the method and a preparation device of the direct-current cable factory joint structure. According to the method, the interface structure between the recovery insulator and the body insulator is adjusted by applying the electric field, so that charge accumulation is effectively reduced, electric field distortion is reduced, and the electrical performance and reliability of the cable factory joint are improved. The method has the advantages of simple process, high controllability and easiness in practical engineering application.

The invention discloses a preparation method of an organic electronic device with visual detection packaging, and belongs to the technical field of electronic device packaging materials. The preparation method comprises the following steps: mixing an organic long afterglow material and a water-oxygen permeable polymer doped material in a solvent to prepare a visual marking solution, and introducing the visual marking solution to the surface of an organic electronic device to be packaged to form a visual marking layer; and introducing a polymer insulating material for isolating water and oxygen on the visual marking layer, and carrying out annealing treatment to form a packaging layer so as to obtain the organic electronic device with visual detection packaging. The packaging integrity of the device can be judged by observing whether the visual mark has afterglow or not: if the visual mark has afterglow, the packaging is complete, and no water and no oxygen permeate; and if no afterglow exists, the packaging is invalid, water and / or oxygen permeates into the packaging, and internal devices are possibly damaged. According to the preparation method, the packaging effect of the organic electronic device is convenient to observe.

The invention provides a surface damage self-diagnosis insulating material as well as a preparation method and application thereof. The surface damage self-diagnosis insulating material comprises a silicon rubber base material, microcapsules and an alkali reagent, wherein the microcapsules and the alkali reagent are dispersed in the silicon rubber base material; the microcapsule comprises a shell and a core material, the shell is a urea-formaldehyde resin polymer, and the core material comprises 2 ', 7'-dichlorofluorescein and ethyl phenylacetate. The mass fraction of the microcapsule in the silicone rubber matrix is 1-10%, and the mass fraction of the alkali reagent in the silicone rubber matrix is 1-10%. According to the surface damage self-diagnosis insulating material provided by the invention, the microcapsule component is added into an existing silicone rubber material, so that the composite material has a damage self-diagnosis function on the premise that the mechanical property and the insulating property are kept good, and red can be displayed as an indication after the material is damaged; the method is of great significance in detection of insulation damage of power equipment, early warning of faults and improvement of use safety and reliability of polymer insulation materials.

This invention provides a high-permeability multilayer flexible soft magnetic film, its preparation method, and its applications. The multilayer flexible soft magnetic film is composed of alternating layers of magnetic metal layers and polymer insulating dielectric layers. Each magnetic metal layer is precisely controlled to be 200–900 nm thick, and each polymer insulating dielectric layer is controlled to be 100–500 nm thick, with the total thickness of the magnetic metal layers accounting for 30%–80%. Through this structural design, the polymer insulating dielectric layer effectively blocks interlayer eddy current paths, significantly suppressing high-frequency eddy current losses. Simultaneously, the high proportion of magnetic layers provides sufficient magnetic flux and magnetic loss contribution, avoiding insufficient magnetic performance due to excessively thick insulating layers or exacerbated eddy current losses due to excessively thick magnetic layers. Therefore, the imaginary peak value of the film's effective permeability is greater than 400, exhibiting excellent high-frequency magnetic loss, wave absorption, and noise suppression capabilities. Furthermore, the structure is stable and flexible, making it suitable for high-frequency filtering, electromagnetic compatibility, and other applications.

Disclosed herein are systems for catheter-like leads. The catheter-like leads include a body made of a super-elastic conductive metallic material, an insulating polymeric sheath made layer-by-layer from one or more chemically compatible polymeric materials, and a silane coupling material that couples the super-elastic conductive metallic material to the insulating polymeric sheath. The catheter includes at least two catheter-like leads configured to form a polymeric-insulated basket structure with a plurality of individual electrodes and / or an electrode basket structure of leads that are themselves relatively large electrodes.

The invention discloses a 3D printing manufacturing method of a quadrupole rod mass analyzer for a QTRAP composite mass spectrum system, and belongs to the technical field of mass spectrometer core component manufacturing. Aiming at the problems of low machining and assembling precision, limited material performance, serious thermal mismatch, insufficient structural design freedom degree and the like in traditional quadrupole rod manufacturing, a metal electrode rod is printed by adopting a selective laser melting technology, and high-precision forming is realized through pre-deformation compensation and electrolytic polishing; printing a PEEK-like insulating support structure by adopting a photocuring technology to form functional structures such as self-concentric positioning, internal dot matrix, stress release and the like; and then precise assembly is carried out through a thermal compensation flexible fastening system. Integrated high-precision manufacturing of the metal electrode and the polymer insulation structure is achieved, the electric field uniformity, the structural reliability and the thermal stability are remarkably improved, and the strict requirements of a QTRAP system for ion transmission efficiency and quality analysis precision can be met.

This suppresses short circuits between electrodes that detect capacitance. [Solution] The problem is solved by a servo accelerometer that detects the displacement of a pendulum by capacitance, where the inertial force generated in the pendulum and the Lorentz force generated by the current flowing through the torque coil wrapped around the torque cup and the magnetic field passing through the yoke are in equilibrium, and the pendulum is equipped with a thin film electrode 10d for detecting capacitance, the yoke is equipped with electrode surfaces 15e and 16e that detect capacitance and are paired with the thin film electrode 10d, and the surface of the thin film electrode 10d is equipped with a polymer insulating layer 40 made of polymer material.

An insulator that supports a line from a pin includes a core that defines an opening configured to receive the pin, and includes a shell formed from a polymer disposed over an outer surface of the core. The insulator also includes a head formed from the core or the shell, and configured to support the line spaced from the pin.

The invention discloses a preparation method of a polyetherimide / metal organic framework composite medium with high insulating property, which comprises the following steps of: performing ligand exchange reaction on a Znsite with coordination capability in 2-methylimidazole zinc salt (ZIF-8) and a polyetherimide (PEI) monomer 4, 4 '-diaminodiphenyl ether (ODA) through thermal field activation in an imidization process of the polyetherimide (PEI), and performing thermal field activation to obtain the polyetherimide / metal organic framework composite medium with high insulating property. A cross-scale multi-site bonding network is formed, so that close combination of 2-methylimidazole zinc salt (ZIF-8) and a polyetherimide (PEI) matrix is realized on a molecular level; the problems of interface defects, uneven dispersion, weak bonding and the like in a traditional composite medium are effectively solved, the breakdown strength of the composite film is remarkably improved, leakage current and dielectric loss are inhibited, meanwhile, excellent frequency stability and high-temperature insulation performance are kept, and a new thought is provided for development of high-performance polymer insulation materials.

The invention relates to the technical field of polymer insulation, in particular to a preparation method of high-compatibility low-dielectric insulation paper based on ceramic modified FPI fiber, which comprises the following steps: S1, pretreating nano AL2O3 powder by using a silane coupling agent; s2, preparing a fluorinated modified polyamide acid glue solution from diamine and dianhydride, and placing the fluorinated modified polyamide acid glue solution in a spinning injector for standing; s3, spinning is conducted through an electrostatic spinning machine, an AL2O3 / FPI modified fiber primary product is obtained, and AL2O3 / FPI modified fibers are obtained after imidization treatment; s4, weighing the AL2O3 / FPI modified fibers, weighing cellulose, and preparing mixed fiber paper pulp; s5, performing vacuum filtration to obtain paper sheets; s6, performing vulcanization treatment to obtain a mixed fiber paperboard; and S7, performing hot-pressing shaping to obtain a primary sample. The fluorinated modified insulation paper is insulation paper obtained by physically blending the ceramic modified FPI fiber and the cellulose to obtain the insulation paper fiber primary pulp and then carrying out a hot pressing process, so that the dielectric constant of the wood insulation paper is effectively reduced, and the temperature resistance grade of the insulation paper is greatly improved.

A multilayer Busbar coating system, in which individual layers are tailored to address functional requirements of electrical insulation, thermal conductivity, EMI shielding and corrosion resistance. A conductive metal core, including any of a Copper or Aluminum, is provided, over which is applied at least one polymer based layer incorporating a Graphene, functionalized Graphene, carbon nanotube, nano-material, MXene material or electrically conductive filler. In a preferred embodiment, a first thermally conducting polymer insulation layer coating is applied over the conductive metal core, with a second EMI resistant layer applied over the first insulation layer. At least one of the polymer layers further includes any of a flame retardant or intumescent coating.

The invention discloses a side chain screening method and system for improving the insulating property of an insulating polymer, and belongs to the technical field of chemical engineering. Determining an energy gap value, an electron trap energy level, a hole trap energy level, a free volume element and a maximum hole diameter and a maximum phonon frequency of each molecular model; determining a trap depth sum through an electron trap energy level and a hole trap energy level, and weighting the trap depth sum with an energy gap value to determine an electron injection factor; determining the number of free volume intervals by dividing the free volume elements into volume intervals; and determining a carrier acceleration factor according to the free volume interval number, the maximum hole diameter and a preset critical diameter, further constructing a breakdown potential comprehensive scoring model taking the breakdown potential index as output, and carrying out comprehensive scoring on the breakdown potential of each molecular model. The method can accurately and comprehensively measure the potential of the alternative side chain for improving the breakdown performance of the polymer.

The invention belongs to the technical field of high-voltage power transmission equipment, and particularly relates to an electric field intensity accurate calculation method and system for a converter transformer valve side bushing. An electrothermal coupling simulation model used for calculating the internal electric field distribution of the valve side sleeve is provided, verification shows that the calculation method result can accurately calculate the internal electric field intensity of the valve side sleeve, and the problem that a traditional electric field calculation method is insufficient in precision is effectively relieved. The method provides theoretical and technical support for electric field intensity optimization of the converter transformer valve side sleeve and reliable design of an insulation system.

The invention discloses a welding device for preparing a continuous large-length polyimide / fluorine-containing polymer insulating composite belt. The welding device comprises a heating platform for providing a controllable welding heat source; the device comprises a heating platform, a welding platform arranged above the heating platform, a heat insulation structure arranged between the heating platform and the welding platform, and pressing and fixing mechanisms arranged on the two sides of the welding platform. And aligning the overlapped part of the two sections of insulating composite tapes with a welding area, starting the heating platform to heat to a set temperature, transferring heat to the overlapped part of the composite tapes through the welding area, and performing welding. By means of the mode, the polyimide / fluorine-containing polymer insulating composite belt can be subjected to on-line rapid butt welding, the welding time is short, the welding strength is high, a welding joint completely meets the tension requirement of the subsequent wrapping procedure, and the continuity and reliability of the production process are guaranteed.

The invention discloses a space charge distribution calculation method based on tunneling effect and hole extraction limitation, and belongs to the technical field of electrical engineering, and the method comprises the steps: building a one-dimensional finite element structure model with a polymer material as a main body and an electrode as a boundary; coupling a Maxwell electromagnetic field theory and a Nernst-Planck theory, applying a periodic polarity reversal voltage at an electrode boundary, and introducing a composite carrier injection model and a hole extraction limited boundary condition to obtain a polymer material space charge distribution model based on a tunneling effect and a hole extraction limited mechanism; and solving the polymer material space charge distribution model to obtain the space charge distribution and electric field distortion rule of the polymer material under the conditions of strong electric field and polarity reversal. The method solves the problem that an existing space charge model cannot effectively describe the tunneling emission and hole extraction limited effect at an electrode interface, and provides important support for polymer insulation aging research under the conditions of a strong electric field and polarity reversal.

The invention relates to a double-sided flexible neural electrode and a preparation method thereof, and the preparation method comprises the steps: preparing a first polymer insulating layer with a pit on a sacrificial layer, and then forming a metal electrode point and a wire for filling the pit; covering a second polymer insulation packaging layer, etching a patterned opening in a region corresponding to an electrode point on the second polymer insulation packaging layer, enabling the upper surface of the electrode point to be partially exposed through the design, and enabling the packaging layer material which is not etched to serve as a supporting structure to be in close contact with the surface of the electrode point to form mechanical anchoring; and removing the sacrificial layer to completely expose the lower surface of the electrode point, thereby forming a unique double-sided contact interface. Compared with the prior art, the device has the advantages that the upper surface and the lower surface of the electrode point are exposed at the same time for bidirectional electrophysiological recording / stimulation, the structural stability of the electrode point is enhanced through the unique mechanical anchoring design, and therefore the long-term reliability of the device in the biological environment is guaranteed while the signal collecting capacity is improved.

Devices, systems, and methods are provided for a high voltage switch. The device can include a first housing, a switch, and a polymer insulating material. The housing can be at ground potential. The switch can be located within the housing and can include a current-breaking component and a moving contact. The current-breaking component can include a fixed contact and an opening contact. The fixed contact can be coupled to a first power lead. The opening contact can be configured to receive a moving contact. The moving contact can be coupled to a second power lead and can be controlled by an actuating mechanism. The polymer insulating material can surround the switch within the housing.

The application provides a preparation method and device of a stretchable conductive interface. The method comprises the following steps: pouring a precursor mixture of a stretchable polymer solution or silica gel into a gradiently changed polytetrafluoroethylene mold placed on a water platform to form a stretchable polymer film with a thickness gradient; covering an electrode patterning mask on the surface of the stretchable polymer film, and depositing a conductive circuit on the surface of the stretchable polymer film by vacuum thermal evaporation or magnetron sputtering to form a micro-crack gold conductive layer covering the surface of the stretchable polymer film, so as to complete electrode patterning and obtain a gradiently changed flexible electrode; connecting one end of the stretchable polymer film with a large thickness of the gradiently changed flexible electrode to a flexible printed circuit board (FPCB), covering a polymer insulating layer film with a modulus matched with the substrate on the surface of the gradiently changed flexible electrode to perform encapsulation and protection, and completing the preparation of the stretchable conductive interface. The application can effectively disperse stress and improve the mechanical stability and durability of the interface.

The invention discloses an insulating material for a new energy battery shell and a preparation method of the insulating material, and relates to the technical field of polymer insulating materials. The preparation method comprises the following steps: melting bisphenol A epoxy resin, dropwise adding a butanone solution of 2-(pentadecafluorooctyl) methyl glycidyl ether under the protection of nitrogen and stirring, adding a triphenylphosphine catalyst, and heating for reaction to obtain a fluorinated modified epoxy resin prepolymer; carrying out high-temperature reaction on polyamide particles and the prepolymer in an internal mixer, cooling and crushing to obtain a fluorinated epoxy / polyamide composite resin matrix; ultrasonically dispersing the boron nitride nanosheets, dropwise adding a tetraethoxysilane solution and ammonia water, reacting, and treating to obtain BN-coated SiO2 core-shell powder; carrying out reflux reaction on the powder and hexadecyl trimethoxy silane, and treating to obtain hydrophobic modified BN-coated SiO2 particles; and premixing the matrix, the particles, the antioxidant and the zinc stearate, performing twin-screw extrusion, cooling, pelletizing and drying to obtain the insulating material. The new energy battery shell material prepared by the invention has excellent insulating property.

An electrically insulated bearing ring includes a polymeric insulating coating for blocking the passage of leakage currents, the coating being formed by spraying on at least one surface of the bearing ring. The electrically insulated bearing ring or rings may be incorporated into a rolling bearing.

The invention relates to a flexible neural electrode with a planar biological interface and a preparation method thereof. The method comprises the following steps: forming a first polymer insulating layer on a sacrificial layer; pre-defining a pit on the first polymer insulating layer by adopting an etching process; preparing a metal working electrode and a wire which fill the pit and have the lower surface flush with the lower surface of the first polymer insulating layer; after the second polymer insulation packaging layer is covered, the sacrificial layer is removed, and the flexible electrode is released; and finally, reversing the device to enable the lower surface of the original first polymer insulating layer to face upwards, so that the working electrode is exposed, and a step-free biological contact interface which is completely flush with the packaging layer is formed. Compared with the prior art, the flexible neural electrode fundamentally solves the problem that electrode steps are generated due to the fact that holes are formed in the packaging layer of a traditional flexible neural electrode, the fitting degree of the electrode and nervous tissue is remarkably improved, interface impedance can be reduced, signal quality can be improved, and long-term biocompatibility can be improved.

The invention discloses a low-dielectric high-heat-resistance motor outgoing line insulation material and a preparation method thereof, and belongs to the technical field of polymer insulation materials. The insulation material is composed of a component A and a component B. The component A comprises boric acid terminated EPDM, a polyolefin elastomer, polypropylene, N-(3, 4-dihydroxyphenethyl)-2-naphthyl formamide and an antioxidant. And the component B comprises LLDPE, polypropylene, a catalyst and an antioxidant. The preparation method comprises the following steps: respectively preparing the component A and the component B, and mixing the component A and the component B in proportion. A dynamic boric acid ester cross-linked network is formed between the boric acid terminated EPDM and the dopamine derivative, so that the final product has excellent low dielectric constant, low dielectric loss, high heat resistance, high insulating strength and unique self-repairing capability; the technical problems that the dielectric property of a traditional silane crosslinking insulating material is deteriorated and damage cannot be self-repaired due to polar small molecules are effectively solved, and the silane crosslinking insulating material is particularly suitable for high-end lead-out wire application scenes such as a high-frequency motor and a metal shielding layer-containing high-end lead-out wire application scene.

An induction heating smelting furnace comprises a refractory layer, and the refractory layer is used for containing furnace charge and molten metal and is formed by knotting and sintering a refractory material; the outer side of the fireproof layer is wrapped with the anti-leakage layer; the gradient heat preservation layer wraps the outer side of the anti-leakage layer and comprises a plurality of layers of fire-resistant heat preservation materials which are arranged from outside to inside, and the density of the fire-resistant heat preservation materials increases from small to large; the waterproof insulating layer is located on the outer side of the gradient heat preservation layer, adopts a polymer insulating film and is laid between the induction coil and the gradient heat preservation layer; the supporting body is a barrel-shaped shell, surrounds the induction coil and the gradient heat preservation layer and serves as a bearing body for fixing the induction coil, the gradient heat preservation layer, the anti-leakage layer and the fireproof layer; and the induction coil is fixedly connected with the support body. Through the optimization of the furnace body structure, the problems of high loss and absorption heat of the furnace lining are solved, the waterproof and insulating properties are improved, the formation of cracks is slowed down, the perforation tendency is reduced, and the like.