9results about How to "Improve resistance performance" patented technology

The invention discloses a sulfur-doped molybdenum ditelluride nanosheet as well as a preparation method and application thereof, and belongs to the technical field of nano materials and components. The preparation method comprises the steps that a catalyst and a molybdenum source are mixed and placed in an ark, then a substrate is placed above the ark, and a pretreated molybdenum source is obtained; a tellurium source is also placed in the ark, then the tellurium source and the pretreated molybdenum source are placed in the double-temperature-zone tubular furnace, the tellurium source is placed on the upstream, the pretreated molybdenum source is placed on the downstream, a growth reaction is carried out, heat preservation is carried out, and molybdenum ditelluride nanosheets are obtained; and soaking the molybdenum ditelluride nanosheet in an ammonium sulfide solution, taking out the molybdenum ditelluride nanosheet, washing with water, and drying to obtain the molybdenum ditelluride nanosheet. The invention also discloses the sulfur-doped molybdenum ditelluride nanosheet and an application of the sulfur-doped molybdenum ditelluride nanosheet in preparation of a memristor device. The molybdenum ditelluride nanosheet generated by ammonium sulfide etching chemical vapor deposition realizes simple sulfur doping treatment of molybdenum ditelluride, the sulfur-doped modified molybdenum ditelluride can be used for preparing memristor devices, a foundation is laid for subsequent neuromorphic application, and the application prospect is good.

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 discloses an ultra-high thick film type cathode electrophoretic coating which comprises color paste and an emulsion, the color paste is prepared by taking thermal expansion microspheres as a filler of quaternary ammonium salt or tertiary amine salt grinding resin, adding carbon black, a dispersing agent, a defoaming agent, pure water and lactic acid, and controlling the grinding process temperature in a grinding manner; the emulsion is a universal emulsion. According to the ultra-high thick film type cathode electrophoretic coating provided by the invention, by utilizing the characteristic that the volume of the thermal expansion microspheres is expanded and amplified by several times or dozens of times after the thermal expansion microspheres are heated, the film thickness of an electrophoretic coating film is remarkably increased in the baking process so as to achieve the effect of an ultra-thick film, and the thick film effect is brought by the volume expansion and amplification of the thermal expansion microspheres, so that the thickness of the electrophoretic coating film is greatly increased in the using process. And the use cost is not increased due to the increase of the thickness of the paint film. Meanwhile, the expansion microspheres are of hollow core-shell structures and have good resistance, so that the product has very excellent throwing power and can be used in various workpiece products with complex inner cavities.

The utility model relates to the technical field of resistors, in particular to an electronic equipment resistor suitable for a wide temperature range. The resistor comprises a resistor body, supporting assemblies are movably connected to the positions, close to the two ends, of the bottom of the resistor body, and protection assemblies are arranged between the outer wall of the resistor body and the two supporting assemblies. Through collaborative design of the protection assembly and the supporting assembly, the reliability problem of a traditional winding resistor in a wide-temperature and vibration environment is solved. The protection assembly adopts an alloy spiral ring to wind a resistor body, a gap is reserved to buffer thermal expansion and cold contraction, and material oxidation and resistance drift are inhibited; the spiral structure and the gap form an elastic buffer space, vibration energy is absorbed, and welding spot stress concentration is avoided. The supporting assembly is movably connected with the bottom of the body through an L-shaped honeycomb supporting plate, disperses vibration stress, adapts to size changes and is in flexible connection with the end in cooperation with fine adjustment of screws, and structural stability is guaranteed.

The invention discloses a self-drying high-insulation coating applied to an automobile battery protection plate and a preparation method of the self-drying high-insulation coating, and relates to the field of coatings, the self-drying high-insulation coating comprises the following components: 30-50 parts of hydroxy acrylic resin, 6-10 parts of nitrocellulose, 1-3 parts of polyethylene wax, 2-6 parts of a dispersant, 2-6 parts of a pigment, 1-4 parts of matting powder, 0.1-0.6 part of a leveling agent and 8-10 parts of ethyl acetate. 8-10 parts of butyl acetate; and 1-3 parts of an adhesion promoter. The self-drying type high-insulation coating for the automobile battery protection plate, provided by the invention, has the advantages that the crosslinking density after curing is large, the performance indexes of a coating in the aspects of hardness, wear resistance, acid and alkali resistance, salt mist resistance, gasoline resistance and other organic solvents are very high, particularly, the insulating property of a paint film is very good, and the self-drying type high-insulation coating has very good adhesiveness when being coated on the surface of a high-temperature powder coating.

The utility model discloses coil winding wire groove machining and welding integrated equipment which comprises a machine body, a groove machining device and a welding device arranged on one side of the groove machining device are arranged on the machine body, and the groove machining device comprises a groove clamping assembly used for clamping a wire to facilitate groove machining. The tool assembly is erected above the groove clamping assembly and used for conducting groove machining on the wire, and the welding device comprises a first welding clamping piece and a second welding clamping piece which are used for clamping the wire with the two groove faces attached to each other so as to facilitate welding. The integrated equipment disclosed by the utility model is tight in procedure connection, reduces the degree of manual intervention, and accurately guarantees the groove processing precision and the groove surface alignment stability, thereby greatly improving the processing efficiency and the welding quality of a winding wire, enhancing the consistency of the welding quality of a coil winding, improving the resistance performance of a coil, and reducing the production cost. And finally, a continuous and efficient production mode is achieved.

This invention relates to a single-particle positive electrode active material capable of exhibiting optimal battery performance, and also to a positive electrode and a lithium secondary battery comprising the positive electrode active material. The positive electrode active material comprises a lithium composite transition metal oxide having the composition shown in Formula 1 as described in this specification and being a single-particle form consisting of 10 or fewer primary particles, wherein the D0 of the primary particles obtained from SEM images... v,50 The particle size is 2.2 μm to 3.7 μm, and the proportion of small particles according to Equation 1 as described in this specification is 5% to 10%.

The present invention relates to a heat treated coated glass for a solar reflector comprising: - a heat treated glass, and - an anti-soiling coating of TiO2 over one side of the heat treated glass, said heat treated coated glass obtainable by a process comprising: • applying over one side of a glass substrate a sol-gel solution in liquid form obtained from the hydrolysis and condensation reactions between a precursor of TiO2 and water, and • subjecting the glass thus coated to a heat treatment process by which the glass substrate is converted into a heat treated glass and concurrently the coating densifies and forms a solid anti-soiling coating of TiO2 over one side of the glass.

According to one embodiment, provided is an electrode group having a flat structure including a flat portion, that includes a wound body having a wound structure of a flat shape and a fixing tape wound one lap or more around an outer periphery thereof. The wound body is configured of a stack wound with a winding number of 50 turns or more so that a center of the wound body is positioned along a first direction, where the stack includes a positive electrode that includes a positive electrode active material-containing layer, a negative electrode that includes a negative electrode active material-containing layer, and a separator. For a thickness T of the flat structure in a second direction intersecting a principal surface in the flat portion, a swollen-state thickness TS in a state of being impregnated with propylene carbonate and a dry thickness TD in a dry state satisfy a relationship of 1.01 < TS / TD < 1.02. At both ends in the first direction, one of the positive electrode active material-containing layer and the negative electrode active material-containing layer protrudes from an end of the other by a protrusion width W within a range of 0.4 mm or more and 1 mm or less.