370results about How to "High volume resistivity" patented technology

A sonic actuator including a multi-layer membrane having a non-metallic elastomeric dielectric polymer layer with a first surface and a second surface, a first compliant electrode layer contacting the first surface of the polymer layer, and a second compliant electrode layer contacting the second surface of the polymer layer. The actuator further includes a support structure in contact with the sonic actuator film. Preferably, the non-metallic dielectric polymer is selected from the group consisting essentially of silicone, fluorosilicone, fluoroelastomer, natural rubber, polybutadiene, nitrile rubber, isoprene, and ethylene propylene diene. Also preferably, the compliant electrode layer is made from the group consisting essentially of graphite, carbon, and conductive polymers. The support structure can take the form of grid having a number of circular apertures. When a voltage is applied to the electrodes, portions of the film held at the aperture of the support structure can bulge due to the electrostriction phenomenon. The resultant “bubbles” can be modulated to generate sonic vibrations, or can be used to create a variable surface for airflow control.

A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a composite oxide containing lithium and metal M other than lithium, and M contains Ni, Mn, and Co. The molar ratio of Ni to the total of Ni, Mn, and Co is from 0.45 to 0.65, and the molar ratio of Mn to the total of Ni, Mn, and Co is from 0.15 to 0.35. The positive electrode active material has a pressed density under a compression of 60 MPa of 3.3 g/cm³ or more and 4.3 g/cm³ or less. The positive electrode active material has a volume resistivity under a compression of 60 MPa of 100 Ω·cm or more and less than 1000 Ω·cm.

A backplane for an electro-optic display comprises a plurality of pixel electrodes, and an adhesive layer disposed adjacent the backplane, the adhesive layer comprising a plurality of pixel regions disposed adjacent the pixel electrodes of the backplane, and at least one inter-pixel region disposed between two pixels of the backplane, the at least one inter-pixel region having at least one of a lower dielectric constant and a higher volume resistivity than the pixel regions of the adhesive layer.

Examples of the present invention relate generally to high electric energy density polymer film capacitors with high charge-discharge efficiency and fast discharge speed. For example, a high energy density polymer capacitor may be fabricated using a polymer blend comprising one or more high dielectric constant PVDF-based polymers (including homopolymers, copolymers and/or terpolymers) and one or more other polymer with low dielectric loss and high volume resistivity compared to the one or more PVDF-based polymers. An example film capacitor may comprise a high temperature fluoropolymer with dielectric loss lower than 0.2% and good film manufacturability. Polymer films can be stretched and orientated at least in one direction to make thinner films with improved performance. Film capacitors can be made by winding metallized films, plain films with metal foils, or using a hybrid construction where the dielectric films comprise the new compositions. Capacitors can also have a multilayer construction where the films are metallized.

The present invention provides a dicing die bond film in which peeling electrification hardly occurs and which has good tackiness and workability. The dicing die bond film of the present invention is a dicing die bond film including a dicing film and a thermosetting type die bond film provided thereon, wherein the thermosetting type die bond film contains conductive particles, the volume resistivity of the thermosetting type die bond film is 1×10⁻⁶ Ω·cm or more and 1×10⁻³ Ω·cm or less, and the tensile storage modulus of the thermosetting type die bond film at −20° C. before thermal curing is 0.1 to 10 GPa.

Flame retardant EMI shielding materials with improved retention of shielding properties are disclosed. The shielding materials are provided with a dispersed flame retardant on the surfaces of the internal interstices. Methods of making the flame retardant shielding materials are also disclosed.

The invention discloses a silane crosslinking HFFR flame retardant polyvinyl chloride cable material and a preparation technique thereof. The compositions by weight portion of the cable material are: 100 portions of polyvinyl chloride resin, 10 to 100 portions of a plasticizer, 0.5 to 10 portions of a silane cross-linking agent, 0.5 to 6 portions of a heat stabilizer, 30 to 100 portions of a metal hydroxide flame retardant, 1 to 10 portions of a metallic compound flame retardant synergist, 0.1 to 5 portions of a preventing cross-linking agent, 0.1 to 5 portions of a lubricant, 0.1 to 0.5 portion of an antioxidizer, 0.05 to 0.1 portion of dibutyl tin dilaurate and appropriate amount of a colorant. The cable material has the characteristics that the mechanical property is good, the mechanical intensity is increased by 20 to 30 percent compared with the uncrosslinked PVC cable material, the heat resistance is good, the electrical property is good, the specific volume resistance is increased by 3 to 5 times compared with the uncrosslinked PVC cable material, the insulating property of the cable is improved and the aging property is good.

The invention relates to a packaging material of a photovoltaic module, in particular to a high-volume resistivity EVA (Ethylene Vinyl-acetate Copolymer) rubber film and a preparation process of the rubber film. The EVA rubber film comprises the following components in percentage by weight: 82%-94% of EVA resin, 5%-15% of polyolefin elastomer (POE), 0.1%-0.5% of ultraviolet aging resisting additive, 0.3%-1.5% of liquid peroxide cross-linking agent and 0.1%-1.0% of liquid silane coupling agent. The high-volume resistivity EVA rubber film disclosed by the invention reduces the VA content, reduces generation of conductive ions, and can increase the resistivity. The polyolefin elastomer is easy to be cross-linked by the effect of an initiating agent, and a plurality of positions are cross-linked with the EVA molecule, thereby realizing high cross-linking density, firmer molecular chain, smaller free volume, higher resistivity, difficulty in conduction, so the EVA rubber film disclosed by the invention has higher volume resistivity which is as high as 1x1015 ohm.cm or higher.

The invention discloses an electric insulating epoxy resin composition which comprises the following components: (A) a mixture of at least two epoxy resins; (B) a mixture of at least two anhydride curing agents; and (C) a micro-nano inorganic particle composition, wherein the micro-nano inorganic particle composition accounts for 63-73wt% of the electric insulating epoxy resin composition. The electric insulating epoxy resin composition disclosed by the invention has high volume resistivity and meanwhile has excellent electric performances such as breakdown strength, heat resistance, mechanical property and machinable property, so that the composition can be used for preparing insulating parts in electric transmission and transformation equipment of a power grid, and is particularly used for preparing insulating parts in electric transmission and transformation equipment of a direct current ultra-high voltage grid.

The invention discloses transformer oil with excellent cooling heat-radiating and moisture preventing properties. The transformer oil is mainly prepared from the following raw materials: hydrogenated stock oil, naphthene thickened oil, an antioxidant and a metal passivator, wherein the ratio of the hydrogenated stock oil to the naphthene thickened oil is (72-82):(18-28) in terms of parts by weight, the amount of the used antioxidant accounts for 0.3-0.5% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil, and the amount of the used metal pasivator accounts for 0.1-0.2% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil. The invention further discloses a preparation method of the transformer oil. The transformer oil has excellent cooling heat-radiating and moisture preventing properties, thus being very suitable for being used in southern areas of China.

Initially, an Yb₂O₃ raw material was subjected to uniaxial pressure forming at a pressure of 200 kgf/cm², so that a disc-shaped compact having a diameter of about 35 mm and a thickness of about 10 mm was produced, and was stored into a graphite mold for firing. Subsequently, firing was performed by using a hot-press method at a predetermined firing temperature (1,500° C.), so as to obtain a corrosion-resistant member for semiconductor manufacturing apparatus. The press pressure during firing was specified to be 200 kgf/cm² and an Ar atmosphere was kept until the firing was finished. The retention time at the firing temperature (maximum temperature) was specified to be 4 hours. In this manner, the corrosion-resistant member for semiconductor manufacturing apparatus made from an Yb₂O₃ sintered body having an open porosity of 0.2% was obtained.

The present invention provide a high dense aluminum nitride sintered body, a preparing method thereof, and a member for manufacturing semiconductor using the sintered body which has excellent leakage current characteristic, enough adsorbing property, good detachment property and excellent thermal conductivity and so can be applied to even a member for manufacturing semiconductor requiring high volume resistivity like the coulomb type electrostatic chucks as well as the Johnsen-Rahbek type electrostatic chucks.

The invention discloses a formulation of glass for producing a direct current glass insulator. The formulation is characterized in that the glass comprises the following compositions in percentage by weight: 65 to 72 percent of SiO2, 1.5 to 3.5 percent of Al2O3, 0.05 to 0.4 percent of Fe2O3, 5 to 8 percent of CaO, 2 to 4 percent of MgO, 5 to 9 percent of K2O, 0.1 to 3 percent of BaO and 6 to 9 percent of Na2O; and simultaneously, the glass also comprises 0.1 to 1 percent of Li2O and 0.1 to 2 percent of SrO. The formulation can effectively reduce the transfer of sodions, improve volume resistivity of the glass, reduce dielectric loss and improve electrical performance of the glass insulator.

The invention discloses an antistatic high-rigidity rotational-moulded polyethylene composition. The antistatic high-rigidity rotational-moulded polyethylene composition comprises the following components: 100 parts by weight of linear low-density polyethylene, 0.1-1.5 parts by weight of antistatic agent, 0.1-1 part by weight of surface modified carbon nanofibers, 0.05-1 part by weight of antioxidant and 0.05-0.10 part by weight of rheology modifier. The invention also provides the preparation method of the composition. The antistatic high-rigidity rotational-moulded polyethylene composition provided by the invention has an outstanding antistatic function; the volume resistivity of the antistatic high-rigidity rotational-moulded polyethylene composition is less than 1*10<8> ohm.cm; the antistatic effect of the antistatic high-rigidity rotational-moulded polyethylene composition is lasting; the volume resistivity of the antistatic high-rigidity rotational-moulded polyethylene composition almost has no change after being soaked in water for 8 months; in addition, the composition also has better rigidity-tenacity balance; the impact strength of the composition is improved by at least 20% and the bending modulus of the composition is improved by more than 30%; simultaneously, the composition is good in environmental stress crack resistance, resin homogeneity and processability.

The invention discloses a high-power high-stability cable material which is prepared from the following raw materials in parts by weight: 6-8 parts of oxidized polyethylene wax, 15-25 parts of PVC (polyvinyl chloride) resin, 3-4 parts of epoxy soybean oil, 3-5 parts of soluble polytetrafluoroethylene, 2-4 parts of nano titanium dioxide, 5-7 parts of ethylene-octylene copolymer, 3-4 parts of carbon fiber, 2-3 parts of benzotriazole, 4-5 parts of red phosphorus, 2-3 parts of nano graphite, 1-2 parts of accelerator CZ, 45-55 parts of nitrile silicone rubber, 6-7 parts of nano calcium carbonate, 2-5 parts of maleic anhydride grafted polypropylene and 8-12 parts of filler. The cable material has favorable chemical property stability, physical and mechanical properties, electrical insulation properties, aging resistance and flame retardancy, and can satisfy the demands for cable manufacturing industry.

The invention discloses a preparation method and a usage method of a low-viscosity flame-retardant heat-conducting solvent-free polyurethane electronic-pouring sealant. The electronic-pouring sealant comprises a component A and a component B, wherein the component A is prepared by means of the following process: adding 100 parts of castor oil, 5 to 15 parts of flame retardant, 1 to 5 parts of high heat conductive insulation composite powder and 0.05 to 3 parts of an anti-foaming agent into a reaction kettle in parts by mass, performing uniform mixing and vacuum dehydration, then adding 0.05 to 0.3 part of a catalyst, and performing uniform mixing to obtain the component A; and the component B is liquefied diphenylmethylene diisocyanate. In the invention, a high heat conductive insulation composite powder heat conduction technology, a polyurethane in-situ polymerization self-flame-retardant technology and a thermal sensitive catalyst asynchronous catalysis technology are adopted, the product viscosity is smaller than 6000mPa.s, the heat conduction coefficient is greater than 1.85W/MK, the volume resistivity is greater than 4.2*10<12>omega.m, and the flame retardant property can be up to the American FMVSS302 standard.

The invention discloses a white packaging film for a double-glazed photovoltaic module. The white packaging film comprises, by weight, 45-65 parts of ethylene-vinyl acetate, 25-50 parts of ethylene propylene rubber, 1-7 parts of white pigment and 0.5-10 parts of aids, wherein the ethylene-vinyl acetate comprises, by weight, 14-33% of vinyl acetate and 15-55% of ethylene propylene rubber; and the ethylene propylene rubber has a density of 0.80-0.91g/cm<3> and Mooney viscosity of 20-40. The dedicated white EVA film for the double-glazed photovoltaic module has high reflection rate, tenacity, volume resistivity and impact resistance, and the double-glazed photovoltaic module made of the film does not cause starved joints, bubbles or the like.

A method for producing a polymer electrolyte membrane type fuel cell including a polymer electrolyte membrane, fuel and air electrodes that sandwich therebetween the polymer electrolyte membrane and that each include a gas diffusion layer and a catalyst layer provided in contact with the polymer electrolyte membrane, and separators provided in contact with the gas diffusion layers. A paste containing at least a carbon powder having a catalyst supported thereon is spread over a predetermined support, and the coated support is dried to form the catalyst layer. A cracking occupation area on the electrodes is controlled to a predetermined tolerance by controlling at least one of (1) a thickness of the catalyst layer, (2) a kind of carbon having the catalyst supported thereon, and (3) a drying rate of a solvent of the paste.

A connector terminal which can achieve high mechanical connection strength and stabilized low electrical connection resistance when it is crimped to an aluminum electric wire, and in addition, can suppress electrical contact resistance low when it is fitted to a mating connector terminal is provided. In a connector terminal (1A) having an electrical contact section (10) which is brought into contact and conducted with a mating connector terminal by fitting to the mating connector terminal, and a conductor crimping section (12) which is crimped to the conductor of an electric wire, a metal material which constitutes the terminal uses aluminum or an aluminum alloy as a base material (100), a Zn layer (101) having a thickness in the range from 0.1 μm to 2.0 μm by electroless plating and a Cu layer (102) having a thickness in the range from 0.5 μm to 1.0 μm by electrolytic plating are formed in sequence on the surface of the base material (100), and an Sn layer (105) having a thickness in the range from 0.7 μm to 1.7 μm by electrolytic plating is formed on the outermost surface.

An electroluminescence element includes a first electrode, a second electrode, and a light emission layer arranged between the first electrode and the second electrode. The first electrode is formed of a material having a higher volume resistivity than that of the material of the second electrode. A connector portion electrically connects a feeder portion to the first electrode. The resistance value of the connector portion differs in correspondence with a position at which the connector portion connects the feeder portion to the first electrode. The brightness distribution of the electroluminescence element is thus adjusted to a desired state.