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A diamond copper-based composite material and a preparation method thereof
ActiveCN121555835Bhigh densityhigh thermal conductivityVacuum evaporation coatingSputtering coatingThermal dilatationHigh density
The application belongs to the technical field of copper-based diamond composite materials, and particularly relates to a diamond copper-based composite material and a preparation method thereof. The preparation method comprises the following steps: mixing modified diamond powder and copper powder by ball milling, and obtaining a diamond copper core material after hot-pressing sintering; activating the diamond copper core material, then magnetron sputtering a Ni / Pr alloy target material onto the upper and lower surfaces of the activated diamond copper core material to form a Ni / Pr composite intermediate layer; vacuum welding copper sheets on the upper and lower surfaces of the Ni / Pr composite intermediate layer to obtain the diamond copper-based composite material. The diamond copper-based composite material prepared by the application has high density, excellent thermal conductivity, low thermal expansion coefficient and is convenient to process.
Owner:CHANGSHA SHENGHUA MICROELECTRONIC MATERIALS CO LTD
Lithium-free high-heat-resistant ceramic paste and preparation method thereof
ActiveCN121318406BImprove bending strengthImprove thermal shock resistanceN dimethylformamideSpinning
The application discloses a lithium-free high-heat-resistant ceramic mud and a preparation method thereof, and relates to the technical field of ceramic materials. In the preparation of the lithium-free high-heat-resistant ceramic mud, alumina is reacted with 3-(2,3-epoxypropoxy) propyl trimethoxysilane to obtain pre-modified alumina; the pre-modified alumina is reacted with starch to obtain modified alumina; ethyl acetoacetate, isopropyl alcohol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide are mixed to form a spinning solution, the spinning solution is electrospun, and then immersed in yttrium oxide sol to obtain alumina-zirconia-yttria composite fibers; the modified alumina, talc, alumina-zirconia-yttria fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water are stirred and mixed, and vacuum pugging is carried out to obtain the lithium-free high-heat-resistant ceramic mud. The lithium-free high-heat-resistant ceramic mud prepared by the application has good thermal shock resistance and bending strength after sintering.
Owner:广东枫树陶瓷原料有限公司
A testing device and testing method for high temperature test deformation
PendingCN122259646AAccurate and reliable measurement resultsMeet the needs of high temperature testingInvestigating phase/state changeStrength propertiesMechanical engineeringTest set
Owner:SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
Insulating coating liquid, insulating coating, and oriented silicon steel
ActiveCN117511261Bsmall expansion coefficientreduce tensionCoatingsO-Phosphoric AcidPhysical chemistry
The application relates to an insulating coating liquid, an insulating coating and oriented silicon steel, components of the insulating coating liquid comprising: a dihydrogen phosphate, a silica sol, phosphoric acid, a zirconium oxide dispersion liquid and chromic anhydride; wherein the content of the zirconium oxide dispersion liquid is 1-5% in mass fraction. The zirconium oxide dispersion liquid can be dissolved into the phosphate coating liquid, and zirconium phosphate generated after heat treatment can reduce the coating expansion coefficient and thus improve the coating tension. The phosphoric acid and the zirconium oxide dispersion liquid can be dissolved in the water-based coating, and zirconium phosphate can be generated after heat treatment. The low expansion coefficient of the zirconium phosphate can improve the coating tension, so that the technical problem of low coating tension existing in the prior art phosphate insulating coating is solved.
Owner:SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
Low-expansion fast-charging modified graphite negative electrode material and preparation method and application thereof
PendingCN122276735Asmall expansion coefficientgood removal effectAlkaline earth metalPhysical chemistry
This invention discloses a low-expansion, fast-charging modified graphite anode material, its preparation method, and its application. The method includes the following steps: A solution of alkaline earth metal fluorides is spray-dried to uniformly deposit onto the surface of crushed, pulverized, and granulated coke raw material, yielding a coke material containing alkaline earth metal fluorides; the coke material is then subjected to low-temperature activation treatment at 800-1000°C under an inert atmosphere to obtain a product; the product is mixed uniformly with the alkaline earth metal fluoride solution and impregnated, followed by graphitization under an inert atmosphere to obtain the modified graphite anode material. This invention introduces alkaline earth metal fluorides for doping modification during the preparation process, thereby promoting impurity removal, improving graphitization efficiency, and ultimately preparing an anode material with a low coefficient of expansion.
Owner:GUANGXI CHENYU NEW MATERIAL CO LTD +4
Welding method for super invar alloy workpiece
PendingCN121988875Ahigh expansion coefficientHigh energy density - low expansion coefficientLaser beam welding apparatusButt jointIncoloy
The invention belongs to the technical field of welding, and particularly relates to a welding method for a super invar alloy workpiece. The welding method of the super invar alloy workpiece comprises the steps that first butt joint faces of two adjacent bottom plates are in butt joint to form a first seam; the bottom plate is provided with a first side and a second side which are arranged oppositely in the thickness direction of the bottom plate, and the first seam is welded from the first side through laser welding to form a first welding seam; wherein the parameters of laser welding for welding the first joint are as follows: the laser power is 5.6 KW to 6.0 KW, the speed is 1.8 m / min to 2.0 m / min, the defocusing amount is + 3 mm to + 6 mm, and the fusion depth is 5 mm. According to the welding method for the super invar alloy workpiece, the welding quality can be guaranteed.
Owner:HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
Invar alloy with ultralow expansion coefficient and precision machining method thereof
PendingCN121951388AImprove puritysmall expansion coefficientIncreasing energy efficiencyLaser beam welding apparatusInvar alloyAlloy
The invention provides an invar alloy with an ultralow expansion coefficient and a precision machining method thereof.The invar alloy is composed of 35.9%-36.3% of Ni, 0.08%-0.12% of Ti, 0.02%-0.04% of Al, 0.003%-0.008% of B and the balance Fe, double VIP + VAR ultra-high-purity smelting, large-deformation multi-directional forging + solid solution structure refining, unique low-temperature stepped aging stabilization, liquid nitrogen ultra-precision cutting and low-heat input laser welding are combined, and the ultra-low expansion coefficient invar alloy is obtained. The invar alloy with ultralow expansion coefficient and high purity is prepared, and the problems of coarse grains and abrupt performance change of a welding area are effectively solved.
Owner:WUXI BLUE GREEN METAL MATERIAL TECH CO LTD
Environment-friendly wood-plastic composite material plate forming device and method
The present application relates to a kind of environmentally friendly wood-plastic composite board forming device, including wood-plastic composite board, transmission mechanism, first support mechanism and second support mechanism being symmetrically arranged along the center cross section of transmission mechanism and being arranged at one end of transmission mechanism, and transfer mechanism being installed above transmission mechanism, first support mechanism and second support machine;Reinforcing rib installation station, lower metal buckle installation station and base plate waterproof gluing station are sequentially arranged along the circumferential direction of the first support mechanism;Cover plate adhesive application station, upper metal buckle installation station and cover plate waterproof gluing station are sequentially arranged along the circumferential direction of the second support mechanism;Thus, the present application solves the technical problem that the strength of the product of the existing wood-plastic composite board is low due to the limitation of material, and when temperature is higher, it is affected by temperature to cause expansion or bending.
Owner:ZHEJIANG YUANSENTAI FURNITURE
High-modulus high-adhesion metal-clad plate and preparation method thereof
The invention discloses a high-modulus high-adhesion metal-clad plate which comprises a metal layer, and a first polyimide layer and a second polyimide layer are sequentially stacked on one surface of the metal layer; a first coating liquid of the first polyimide layer comprises a diamine monomer containing a benzimidazole unit, a diamine monomer containing a sulfuryl unit, an active end-capping reagent and a flexible dianhydride monomer; a second coating liquid of the second polyimide layer comprises a diamine monomer of a benzimidazole-benzoxazole unit and a rigid dianhydride monomer which is equal to the diamine monomer in mole. Through compounding of the first polyimide layer and the second polyimide layer, the toughness and the mechanical strength of the composite polyimide film and the adhesive force with a metal plate are flexibly adjusted.
Owner:JIANGYIN JUNCHI PHOTOELECTRIC SCI & TECH CO LTD
A tenon-and-mortise interlocking type ultra-high strength aluminum alloy steel core conductor and its preparation method
PendingCN122091316AImprove conductivityhigh tensile strengthInsulated cablesCable/conductor manufactureSiluminUltimate tensile strength
This invention relates to the field of overhead power transmission conductor technology, and in particular to a tenon-and-mortise interlocking ultra-high strength aluminum alloy steel core conductor and its preparation method. The conductor comprises an ultra-high strength steel core and an outer ultra-high strength aluminum alloy conductive layer. The ultra-high strength steel core is a G3A grade galvanized steel core, and the ultra-high strength aluminum alloy conductive layer is composed of 3-4 layers of S / Z type tenon-and-mortise interlocking wires concentrically stranded. The S / Z type tenon-and-mortise interlocking wires are a single-layer, single-wire concave-convex interlocking structure. This invention optimizes the Mg-Si-Zr-RE-B multi-element alloy composition system, achieving a Mg to Si mass ratio of 1.0-1.4, and combines this with a "solution-cold drawing-double-stage aging" process. This maintains high conductivity while increasing tensile strength to ≥360MPa, achieving an excellent match of high strength and high conductivity, and significantly improving strength while ensuring unchanged conductivity.
Owner:FAR EAST CABLE +2
Painting mold for horizontal enameled flat wire and preparation method of painting mold
PendingCN121945754AWear-resistantlow elastic modulusInsulating conductors/cablesThermal dilatationMagnesium matrix composite
The invention provides a lacquering mold for a horizontal enameled flat wire and a preparation method of the lacquering mold, and relates to the technical field of mold material processing. The material used by the painting mold is an aluminum-based or magnesium-based composite material reinforced by ceramic particles, and the ceramic technology is one or more of SiC, TiC, TiB2, Al2O3 particles or whiskers. The mold is manufactured by adopting a powder injection molding process. The lacquering mold for the horizontal type enameled flat wire has the advantages of being low in thermal expansion coefficient, high in hardness and elasticity modulus and good in abrasion resistance, can stably float at the design position in a paint box, and solves the problem that due to the fact that a traditional mold is large in weight and deviates from the center, the thicknesses of paint films on the upper side and the lower side of the enameled flat wire are not consistent.
Owner:BAODING TIANHUA CHUANGYUAN TECHNOLOGY CO LTD
A method for manufacturing a photosensitive integrated circuit build-up insulating film
The present application relates to the technical field of insulation film, especially to the field of IPC G03F, more particularly to a preparation method of a photosensitive integrated circuit stacked insulation film. The present application is based on the actual market demand, and scientifically designs the formula of the stacked insulation film material by combining basic research with industrial development, so as to realize the manufacturing of the fine line laminated adhesive film with low thermal expansion coefficient, high frequency low dielectric, low loss, high bonding force. The material has good performance in insulation, mechanics, heat conduction and the like, and does not depend on the expensive precision drilling equipment imported, and these performances enable it to replace ABF in the electronic field such as microchip integrated insulation technology, and have wide application prospect.
Owner:SHENZHEN SAPIENCE TECH CO LTD
Disc-shaped electronic gun filament firing tool
The utility model discloses a kind of disc incense type electron gun filament firing frock, it is related to electron gun filament firing technical field, including ceramic frock table, disc incense type customization groove and electric heating base, the inside of the ceramic frock table is provided with disc incense type customization groove, and disc incense type customization groove bottom end is provided with disc and is set in the tungsten wire of disc incense type customization groove inside, the outside of the ceramic frock table is provided with electric heating base, and the side of electric heating base is installed with external connection pipe, the inside of the external connection pipe is provided with solenoid valve, the top of electric heating base is installed with external connection block, and the top of external connection block is provided with vacuum cover body, the inside of the external connection block is provided with sealing assembly for sealing the position of vacuum cover body, the device has the ceramic material of ceramic frock table frock adoption, heating process will not cause tungsten wire and ceramic frock adhesion one piece, and ceramic expansion coefficient is small, will not extrude tungsten wire in it, and then guarantee the integrity of firing.
Owner:ANHUI HAITAIKE ELECTRONIC TECH CO LTD
Pipe connection assembly, refrigeration device and refrigeration system
ActiveCN224469853UAvoid electrochemical corrosion problemsExtended service lifePipe fittingElectro conductivity
This utility model provides a pipe connection assembly, a refrigeration device, and a refrigeration system. The pipe connection assembly includes a first pipe fitting made of copper or a copper alloy, a second pipe fitting made of aluminum or an aluminum alloy, and a transition pipe connecting the first and second pipe fittings. The transition pipe has a lower electrical conductivity and a lower coefficient of linear expansion than the second pipe fitting. Both ends of the transition pipe are inserted into the first and second pipe fittings, respectively. The outer wall of the transition pipe has an outwardly protruding annular barrier portion located between the ends of the first and second pipe fittings, which blocks the ends of both pipe fittings at any point in its circumference.
Owner:HANSHAN RUIKE METAL CO LTD
Magnetic and heat conductive film glass etching agent, its preparation method and application
The application discloses a kind of magnetic film glass etchant and its preparation method and application, the chemical composition of glass etchant is: Li2O 0~2wt%, Na2O 1.5~2.5wt%, K2O 2~4wt%, MgO 2.5~4.5wt%, B2O38~12wt%, SiO210~20wt%, TiO21.5~5wt%, Al2O30.4~1.2wt%, Bi2O320~30wt%, V2O535~45wt%, Nb2O50.5~2.5wt%.The melting temperature of the glass etchant of the application is low, the expansion coefficient is low, the surface tension is small, the high-temperature viscosity is low, can penetrate to ceramic or glass surface through metal powder layer at high temperature, play the role of etching ceramic or glass surface, thereby increase the roughness and surface area of ceramic or glass surface, make metal layer and ceramic or glass bond firm, and will not increase the resistance of metal layer, effectively improve the heating efficiency, thereby be favorable to promote the technical progress and development of electromagnetic induction furnace magnetic heating material industry.
Owner:JINGDEZHEN CERAMIC UNIV