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Light emitting apparatus and method for producing the same
ActiveUS20100320479A1Inhibition lossIncrease brightnessSolid-state devicesSemiconductor/solid-state device manufacturingOptical controlInorganic materials
A light emitting apparatus and a production method of the apparatus are provided that can emit light with less color unevenness at high luminance. The apparatus includes a light emitting device, a transparent member receiving incident light emitted from the device, and a covering member. The transparent member is formed of an inorganic material light conversion member including an externally exposed emission surface, and a side surface contiguous to the emission surface. The covering member contains a reflective material, and covers at least the side surfaces of the transparent member. Substantially only the emission surface serves as the emission area of the apparatus. It is possible to provide emitted light having excellent directivity and luminance. Emitted light can be easily optically controlled. In the case where each light emitting apparatus is used as a unit light source, the apparatus has high secondary usability.
Owner:NICHIA CORP
Power plant
ActiveUS20100029428A1Reduce size and costMake smallEngine controllersTransmission elementsAutomotive engineeringPower station
To provide a power plant which is capable of reducing power passing through a distributing and combining device, thereby making it possible to attain reduction of the size and manufacturing costs of the power plant and enhance driving efficiency of the same. The power plant 1 for driving driven parts DW and DW includes a prime mover 3, a first distributing and combining device 20 having first, second and third elements 21, 24 and 22, a second distributing and combining device 30 having fourth, fifth and sixth elements 31, 34 and 32, and speed-changing devices 40, 50, 2, 61 and 62 which are connected to the third and sixth elements 22 and 32 and are capable of changing the relationship between the rotational speed of the third element and that of the sixth element 32. The second and fourth elements 24 and 31 are mechanically connected to an output shaft 3a of the prime mover 3, and the first and fifth elements 21 and 34 are mechanically connected to the driven parts DW and DW.
Owner:HONDA MOTOR CO LTD
Image capture lens
ActiveCN102985865ASmall outer diameterInhibition lossTelevision system detailsLensNegative refractionCamera lens
Provided is a six-layer configuration image capture lens that is compact and has adequate light at F2 or less, and wherein all aberrations are effectually corrected. In order from the object side, the image capture lens is configured of a first lens having a positive refraction and with a convex face oriented toward the object side; a second lens having a negative refraction and with a concave face oriented toward the imaging side; a third lens having either a positive or a negative refraction; a fourth lens having a positive refraction; a fifth lens having a positive refraction and with a convex face oriented toward the imaging side; and a sixth lens having a negative refraction and with a concave face oriented toward the imaging side. The imaging side face of the sixth lens further comprises an aspherical face shape, has an inflection point in a location other than a point of intersection with the optical axis, and satisfies the following formulae: ? d1 > 50, and ? d2 = 30, wherein ? d1 is the Abbe's number of the first lens, and ? d2 is the Abbe's number of the second lens.
Owner:KONICA MINOLTA INC
Semiconductor integrated circuit device and vehicle-mounted radar system using the same
ActiveUS20060226415A1Reduce chip areaReduce the high-frequency lossWave based measurement systemsSemiconductor/solid-state device detailsRadar systemsSapphire
A semiconductor integrated circuit device includes a HFET formed on part of a substrate made of sapphire and including a Group III-V nitride semiconductor layer, a dielectric film formed on the substrate to cover the top and side surfaces and upper corners of the Group III-V nitride semiconductor layer, a microstrip line formed with the dielectric film interposed between the substrate and the microstrip line, and a drain lead which is formed on part of the dielectric film and through which the HFET is electrically connected to the microstrip line.
Owner:PANASONIC CORP
Nanostructured quasi-solid electrolyte applied to lithium ion batteries or lithium sulfur batteries and preparation method and application thereof
ActiveCN105070946AImprove conductivityImprove stabilitySolid electrolytesCell seperators/membranes/diaphragms/spacersSolid state electrolyteLithium sulfur
The invention discloses a nanostructured quasi-solid electrolyte applied to lithium ion batteries or lithium sulfur batteries and a preparation method and application thereof. The nanostructured quasi-solid electrolyte is a macro solid-state electrolyte material which is formed by an inorganic-organic hybrid framework material adsorbing ion conductive agent. The preparation method of the nanostructured quasi-solid electrolyte is as follows: in protective atmosphere, the inorganic-organic hybrid framework material is soaked in the ion conductive agent and sufficiently mixed, and redundant solvent is then volatilized. The prepared nanostructured quasi-solid electrolyte with high lithium ion conductivity can be substituted for both organic electrolyte and diaphragms in conventional lithium ion batteries, and thereby safety problems caused by the leakage of the organic electrolyte can be effectively prevented; a lithium battery assembled from the electrolyte can use a metal lithium plate as a cathode.
Owner:CENT SOUTH UNIV
Fruit-vegetables antistaling agent, preparation and application thereof
InactiveCN101366411AAnti agingInhibit spoilage and mildewFruit and vegetables preservationAdditive ingredientSalicylic acid
The invention provides a fruit and vegetable fresh-keeping agent, a preparation method and application thereof. The fresh-keeping agent uses burdock fructo-oligosaccharides as main composition and combines aqueous solution prepared by chitosan, ascorbic acid, salicylic acid, calcium chloride and acetic acid to treat fruit and vegetable, so that a fruit and vegetable system can obtain the improved resistance, and a hyaloplasmic fresh-keeping membrane is formed on the surface of the fruit and the vegetable so as to effectively inhibit the growth of microbe, prevent moisture dissipation and contact between the fruit and the vegetable and air, and inhibit breath and transpiration, thereby greatly deferring aging of the fruit and the vegetable, and inhibiting putridity, mildew and rot. The fruit and vegetable fresh-keeping agent is applicable to storage and fresh-keeping for various fruits and vegetables with long fresh-keeping period and small consumption of nutrient materials.
Owner:SHANDONG UNIV
Polyphase permanent magnet synchronous motor current waveform optimal control method
ActiveCN103490692AEffective amplitudeEffective Phase Gain ControlElectronic commutation motor controlVector control systemsControl vectorElectric machine
The invention discloses a polyphase permanent magnet synchronous motor current waveform optimal control method, comprising the following steps of A, current reference value coordinate transformation; B, current multiple proportion resonance regulation; and C, coupling compensation. In the control method, based on polyphase permanent magnet synchronous motor vector control, a polyphase synchronous rotating coordinate system current reference value is transformed to a current reference value of each phase in a polyphase static coordinate system through polyphase coordinate transformation, the current reference value of each phase and a current feedback value of each phase of a motor are respectively subjected to improved multiple superposition proportion resonance regulation, and a resonance separation method is introduced, decoupling is realized by feed-forward compensation, and floating tracking and harmful subharmonic restraining for highly dynamic property fundamental waves and usable subharmonic are realized. The method can restrain the adverse impacts, such as motor loss, torque ripple and vibration noise, caused by a harmful harmonic current of the polyphase motor, can explore the positive effects of the usable harmonic current, gives full play to the advantages of the polyphase motor and improves the system performance.
Owner:武汉长海电力推进和化学电源有限公司
Anode and secondary battery
InactiveUS20090311608A1Improve performanceReduced characteristicsSilver accumulatorsElectrode carriers/collectorsSiliconVoltage
A secondary battery capable of improving the cycle characteristics and the voltage retention characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolyte. The anode includes an anode current collector, an anode active material layer formed on the anode current collector and including an anode active material containing silicon as an element, and a coat formed on the anode active material layer and having an integral structure of three-dimensional network.
Owner:SONY CORP
STATCOM unbalance compensation control method based on modular multilevel converter
ActiveCN103532156AImprove efficiencyEliminate imbalanceFlexible AC transmissionAc-dc conversionPower gridModularity
The invention discloses a STATCOM unbalance compensation control method based on a modular multilevel converter (MMC). The method comprises a converter compensation current dead-beat control method and a converter interphase circular current active damping control method. A comprehensive compensation current dead-beat control part is used for compensating active loss in the MMC by controlling active current, reactive current and negative-sequence current which are output by the MMC so as to eliminate unbalance of the current of a power grid and compensate reactive power; the interphase circular current active damping control method is used for summing by detecting the bridge arm current of upper and lower bridge arms of each phase and multiplying by 0.5 to obtain the circular current of each phase, and superposing the output of three-phase current passing through an active damping controller to dead-beat control output so as to inhibit the alternating current component of the circular current, reduce the current stress of converter devices and reduce the loss of the converter. Through the adoption of the method provided by the invention, compensation of the negative-sequence current and reactive current of unbalanced load of the power grid is realized, inhibition of the interphase double frequency circular current of the MMC is simple, the response speed is high and the stability is high.
Owner:HUNAN UNIV
Electric heater for pipeline
InactiveCN1908499AImprove efficiencyIncrease heat conduction areaPipe heating/coolingPipeline systemsElectric heatingEngineering
An electric heater for pipeline is an electric heater used for heating the pipeline or the medium therein. A temperature control unit is composed of a SCM and a temperature sensor, also has two bush-shape metal endoconches. On the inwall side of the two metal endoconches is fixed with an electric heating pipe, also has two bush-shape molding heat-conducting layers made of heat conducting materials used in shrinking on the pipeline. The outerwall side of the molding heat-conducting layers is joint with the inwall side of two metal endoconches. Also provided are two bush-shape molding insulating layers joint with the outerwall side of the two metal endoconches, two bush-shape shell on the external surface of the two molding insulating layers. Also provided are the fixed links joining the heating module on the pipeline. The invention has the advantages of high thermal efficiency, convenient to assemble and disassemble and is widely used in a variety of pipeline heating occasions.
Owner:成都市兴岷江电热电器有限责任公司
Lightweight energy-saving paint and its preparation method
The invention discloses a lightweight energy-saving paint and its preparation method. The paint provided by the invention comprises the following components of: by weight, 45-55 parts of corundum hollow spheres, 20-30 parts of a lightweight filling material, 5-10 parts of fiber, 15-20 parts of a binder and 0-5 parts of an additive. The lightweight energy-saving paint prepared in the invention has characteristics of good fluidity, high strength, low thermal conductivity, strong adhesive force, high refractoriness, good chemical stability, strong corrosion resistance and the like, can be used for the surface coating of high temperature pipelines, thermal equipment and hearth inside and outside parts to effectively inhibit heat radiation and calorific loss, and can be used for spraying and coating the internal and external surfaces of various concrete structures and steel structure buildings so as to save energy, insulate sound and prevent fire.
Owner:王立旺
Apparatus and process for producing acetylene by plasma pyrolysis of coal and natural gas
Production of ethyne by coal and natural gas plasma pyrolyzation and its apparatus are disclosed. It is produced by spraying plasma, buggy steam current and natural gas protective gas in plasma reactor, reacting and generating mixed ethyne gas, cooling, separating, storing ethyne, passing gas into plasma generator and reutilizing, sprayed natural gas forming gas protective layer on plasma reactor wall to prevent carbon fragment from coking, and pyrolytic reacting to obtain mixed ethyne gas. It achieves high converting efficient and reacting efficient.
Owner:TAIYUAN UNIV OF TECH
Method for manufacturing separator and electro-chemical device equipped with separator manufactured thereby
ActiveCN103814459AInhibition lossImprove adhesionFinal product manufactureSecondary cells manufacturePorous substratePorous coating
Owner:LG ENERGY SOLUTION LTD +1
Self-balancing pressure-resistant casing device
ActiveCN105197183AMaintain balanceMaintain stabilityWaterborne vesselsUnderwater vesselsControl systemAgricultural engineering
Owner:JIANGSU UNIV OF SCI & TECH
Method for preparing hydrophobic silicon dioxide
InactiveCN101070439APrevent self-condensationPromote hydrolysisCoatingsInorganic compound additionPolymer scienceEmulsion
The invention relates to one kind of preparation methods of the hydrophobic silicon dioxide using coating, rubber, resin, agricultural chemicals or paper and so on., the characteristic of this method includes the following steps: 1)Select raw materials: according to the principle that the weight of the silicon hydride resin acceptor is 2 -20% of the water affinity silicon dioxide to select the silicon hydride resin acceptor and the water affinity silicon dioxide; 2)Mixing the silicon hydride resin acceptor and the O / W emulsion sparse hydration medicinal preparation below 0 degree C to 40 degree C, making the O / W emulsion sparse hydration medicinal preparation whose surface absorbs hydrolyze substance of the silicon hydride resin acceptor; 3)Contacting the O / W emulsion sparse hydration medicinal preparation made by the second step, with the surface absorbing hydrolyze substance with the water affinity silicon dioxide, and carrying on heat treatment for the mixture of the water affinity silicon dioxide and the O / W emulsion sparse hydration medicinal preparation, the process's temperature is 100 degree C to 130 degree C, the process's time is 20 to 100 minutes, gain the hydrophobic silicon dioxide. The hydrophobic silicon dioxide made by this invention has the high hydrophobic characteristic.
Owner:WUHAN UNIV OF TECH
Method of on-line pretreatment inhibiting coking by hydrocarbon pyrolysis apparatus
InactiveCN1928020AImprove erosion resistanceInhibition lossThermal non-catalytic crackingPre treatmentBurning out
The present invention relates to method of online inhibiting coking in hydrocarbon cracking apparatus. The method is that after the coke is burnt out, the hydrocarbon cracking apparatus is pre-treated with chemical(s) containing S, Si and Mg and inert gas at 400-1000 deg.c for 1-8 hr. The technological process first poisons the catalyst n the furnace tube surface and then deposit one layer of compact ceramic coating combined tightly to the furnace tube, and can reduce coking greatly and increase the production period. The method is simple and may be completed repeatedly.
Owner:EAST CHINA UNIV OF SCI & TECH
Power plant
ActiveUS8226513B2Small sizeReduction of size and manufacturing costEngine controllersTransmission elementsPower stationEngineering
To provide a power plant which is capable of reducing power passing through a distributing and combining device, thereby making it possible to attain reduction of the size and manufacturing costs of the power plant and enhance driving efficiency of the same. The power plant 1 for driving driven parts DW and DW includes a prime mover 3, a first distributing and combining device 20 having first, second and third elements 21, 24 and 22, a second distributing and combining device 30 having fourth, fifth and sixth elements 31, 34 and 32, and speed-changing devices 40, 50, 2, 61 and 62 which are connected to the third and sixth elements 22 and 32 and are capable of changing the relationship between the rotational speed of the third element and that of the sixth element 32. The second and fourth elements 24 and 31 are mechanically connected to an output shaft 3a of the prime mover 3, and the first and fifth elements 21 and 34 are mechanically connected to the driven parts DW and DW.
Owner:HONDA MOTOR CO LTD
Illuminating device and backlight device employing the illuminating device
InactiveUS7344291B2Thin display thicknessImprove efficiencyMechanical apparatusPoint-like light sourceOptical propertyDichroic prism
Owner:SONY CORP
Strawberry preservative containing functional amino acids
InactiveCN103168836AExtended shelf lifeReduce natural decay indexFruits/vegetable preservation by coatingChemistryFruits and vegetables
The invention provides a strawberry preservative containing functional amino acids. The strawberry preservative is characterized in that the strawberry preservative comprises 0.2-0.5g / L of gamma-aminobutyric acid, 0.3-0.5g / L of arginine, 5.0-10.0g / L of ascorbic acid, 7.5-10.0g / L of calcium chloride, 5.0-10.0g / L of acetic acid, 10.0g / L of chitosan, and the balance distilled water. The preparation method of the strawberry preservative comprises the following steps: dissolving ascorbic acid and acetic acid in distilled water, adding chitosan to the obtained solution, dissolving, uniformly mixing, and sequentially adding gamma-aminobutyric acid, arginine and calcium chloride. The strawberry preservative can substantially reduce the rotting rate of fruits and prolong the storage period and the shelf life of strawberries when the strawberry preservative is used for the preservation and fresh keeping treatment of the strawberries. Additionally, the ingredients of the preservative contain a proper amount of a food additive and are rich in the functional amino acids which comprise arginine and gamma-aminobutyric acid and have nutrition and healthcare effects on human bodies, so there is no toxicity residual, and the nutrition and healthcare effects of fruits and vegetables to the human bodies can be enhanced, thereby the preservative accords with the current preservative development direction and has a good exploitation application potential.
Owner:SHANDONG UNIV OF TECH
Short-circuit fault-tolerant vector control method for embedded hybrid magnetic material fault-tolerant cylindrical linear motor
InactiveCN105245156ASimple structureImprove reliabilityElectronic commutation motor controlAC motor controlVoltage source inverterCompensation strategy
The invention discloses a short-circuit fault-tolerant vector control method for an embedded hybrid magnetic material fault-tolerant cylindrical linear motor. The short-circuit fault-tolerant vector control method comprises the following steps: building a five-phase embedded hybrid magnetic material fault-tolerant cylindrical linear motor model; compensating normal thrust missing caused by a short-circuit fault phase and suppressing a thrust ripple caused by phase short-circuit current with non-fault phase current of the motor; and obtaining expected phase voltage by adopting a series of coordinate conversion and voltage feed-forward compensation strategies, and achieving a fault-tolerant vector control after the phase short-circuit fault of the motor by a zero-sequence voltage harmonic injection-based CPWM modulation mode. According to the short-circuit fault-tolerant vector control method, the motor can suppress the thrust ripple of the motor under the condition of a phase short-circuit fault-tolerant operation; more importantly, the dynamic property, the steady-state performance and the properties in a normal state are consistent; the switching frequency of a voltage source inverter is constant; a CPU is low in overhead; and a natural coordinate system only needs to counterclockwise rotate a certain angle in any phase short-circuit fault, so that the motor fault-tolerant operation can be achieved.
Owner:JIANGSU UNIV
Hemostatic materials
InactiveUS20060051340A1Inhibition lossShort timePeptide/protein ingredientsSynthetic resin layered productsAdditive ingredientThrombin activity
A safe and effective hemostatic material is provided. A hemostatic material comprising as an effective ingredient thrombin and fibrinogen characterized in that a bioabsorbable synthetic nonwoven fabric is used as a supporting material. The use of the hemostatic material of the present invention allows for quick and thorough hemostasis for both projectile bleeding and exudative bleeding.
Owner:JURIDICAL FOUND THE CHEMO SERO THERAPEUTIC RES INST
Drive device and vehicle with same
ActiveCN102362097ALarge reduction ratioImprove handling stability (turn)Hybrid vehiclesElectric propulsion mountingEngineeringElectric motor
A drive device (1A) provided with electric motors (2A, 2B) for outputting driving power and also with planetary gear type reduction gears (12A, 12B) arranged between axles (10A, 10B) connected to circular tube shafts (16A, 16B) serving as the output shafts of the electric motors (2A, 2B) and to rear wheels (LWr, RWr). The drive device (1A) is also provided with a unidirectional power transmitting means provided in a transmission route from the electric motors (2A, 2B) to the axles (10A, 10B) and transmitting the unidirectional rotational power of the electric motors (2A, 2B) to the axles (10A, 10B) and with a bidirectional power transmitting means for transmitting the bidirectional rotational power of the electric motors (2A, 2B) to the axles (10A, 10B).
Owner:HONDA MOTOR CO LTD
Essence particle additive as well as preparation method and application thereof
The invention discloses an essence particle additive as well as a preparation method and an application thereof. The particle additive consists of a particle carrier, cigarette essence and a polymeric membrane, wherein the particle carrier is used for loading the cigarette essence, and the polymeric membrane is used for coating the particle carrier loaded with the cigarette essence; the particle carrier is composed of calcium carbonate particles, a molecular sieve, tea dust, microcrystalline cellulose or cellulose microspheres; the cigarette essence is isoamyl alcohol, phenethyl alcohol, menthol, linalool, terpinol or limonene; and the polymeric membrane is prepared from sodium alginate tech grade, carboxymethyl cellulose, hydroxyethyl cellulose or pullulan. According to the physical form of the cigarette essence, the essence particle additive can be prepared by a liquid-state method and a solid-state method. When being applied to the flavoring of a cigarette filter and the production of a cigarette, the essence particle additive has the beneficial effects that when the cigarette is not sucked, the volatilization and diffusion of the essence are restrained, and when the cigarette is sucked, the essence can be uniformly released without the dependence on external forces.
Owner:CHINA TOBACCO CHUANYU IND
Spirobifluorene derivative and application of spirobifluorene derivative in field of organic electroluminescence
ActiveCN107141191ASuppress energy lossLong-life device performanceOrganic chemistrySolid-state devicesOrganic electroluminescenceOrganic solar cell
The invention relates to a spirobifluorene derivative and application of the spirobifluorene derivative in the field of organic electroluminescence. A compound provided by the invention can be used in electronic devices, particularly organic electroluminescent devices, organic field-effect transistors and organic solar cells and is particularly suitable for a light-emitting host material, an exciton blocking material or an electron transport material for preparing the organic electroluminescent devices. In addition, the invention also relates to the electronic device comprising the compound.
Owner:维思普新材料(苏州)有限公司
Electric power controller for vehicle with stop start system
ActiveUS20110266865A1Inhibition lossPreventing electric voltage of the power capacitorHybrid vehiclesElectrical apparatusIdle speedEngineering
An electric power controller for a vehicle with stop-start system is provided to prevent electric energy from being decreased in a power capacitor when an engine is in an idle-stop state. The engine is in the idle-stop state by idle-stop control means, the transfer of the electric energy between the power capacitor and a vehicle-mounted battery is stopped by power control means connected between the power capacitor and the vehicle-mounted battery.
Owner:MITSUBISHI ELECTRIC CORP
Two-way DC-DC converter
InactiveCN1571254AInhibition lossSimple compositionEfficient power electronics conversionOther accessoriesDc dc converterLc resonant circuit
The invention allows DC power supply systems efficiently accommodate each other for electric power, with a simple control system with no fear of a large current flowing a switching element at turning on / off, with less switching loss.A rectification element is connected parallel to each of switching elements 4-1 to 4-4 of a low-voltage side switching part 4, while a rectification element is connected parallel to each of switching elements 5-1 to 5-4 of a high-voltage side switching part 5. By performing switching control either or both of the low-voltage side switching part 4 and the high-voltage side switching part 5 at the same time, an electric power is traded between DC power sources through a transformer 3. An LC resonance circuit 6 is provided between a high-voltage side coil 3-2 of the transformer 3 and the high-voltage side switching part 5, or between a low-voltage side coil 3-1 of the transformer 3 and the low-voltage side switching part 4, so that the current flowing a primary side and secondary side is made to be sine wave, for switching near its zero crossing point.
Owner:HONDA MOTOR CO LTD
Orchard grass intercropping method
InactiveCN105993478AReduce disease incidenceImprove fertilityAlkali orthophosphate fertiliserAmmonium orthophosphate fertilisersDiseaseTree trunk
The invention relates to the technical field of agriculture, and provides an orchard grass intercropping method. The method comprises the following steps: zones are divided, wherein grass is planted between orchard lines, and straws are laid within a range of 0.5m from tree trunks; plowing is carried out, wherein an EM inoculant is spread to grass planting zone soil, and plowing is carried out after 20-30 days; seed soaking is carried out, wherein grass seeds are soaked with the EM inoculant for 4-12h, and are air-dried at a shaded and ventilated place; sowing is carried out, wherein a sprinkler irrigation treatment is carried out with a diluted composite bacterial fertilizer, and uniform sowing is carried out with a sowing amount of 12-15kg / Mu when the soil is moist; management is carried out, wherein watering is carried out after sowing, and sprinkler irrigation is carried out with a diluted EM inoculant when seedlings uniformly shoot; and maintenance is carried out, wherein a grass height is maintained at 10-20cm, and a mixture of trimmed-off grass and straws is laid within a range of a tree base. The method has water-retaining, fertilizer-retaining and drought-resisting functions. With the method, farm chemical is not applied, and the effect of green manure is good. Chemical fertilizer is saved, and disease degree can be reduced from the source. Soil salinization can be effectively ameliorated, and fruits can be green and organic.
Owner:北京百丰生物科技集团有限公司
Power supply system, vehicle provided with the same, power supply system control method and computer-readable recording medium bearing program for causing computer to control the power supply system
ActiveUS20090183934A1Loss in power supply can be suppressedReduce resistance lossPlural diverse prime-mover propulsion mountingPropulsion by batteries/cellsEngineeringRecording media
First and second converters are connected in parallel to positive and negative lines, respectively. When a required power is smaller than a reference value, an ECU controls the first and second converters such that one of the first and second converters operates and the other stops. When the required power is equal to or larger than the reference value, the ECU controls the first and second converters such that both the first and second converters operate.
Owner:TOYOTA JIDOSHA KK
3D printing preparation method for injection mold
InactiveCN105562691AAvoid crackingAdd C elementAdditive manufacturing apparatusIncreasing energy efficiencyPolymer scienceEvaporation
The invention discloses a 3D printing preparation method for an injection mold. The 3D printing preparation method comprises the following steps that 1, mixed powder is prepared, and then vacuum induction melting is carried out, wherein the mixed powder is prepared from, by weight percent, 0.4% to 0.5% of C, 0.7% to 0.75% of Si, 0.35% to 0.45% of Mn, 14% to 15.6% of Cr, 0.25% to 0.35% of V and the balance Fe; 2, an atomization powder preparing method is adopted for preparing the powder; 3, a three-dimensional model is established; 4, the injection mold is formed; and 5, the formed injection mold is separated from a substrate, and then the injection mold is placed in a muffle furnace for annealing to improve the plasticity and toughness of the injection mold. According to the 3D printing preparation method, cracking of mold steel in the 3D printing process can be effectively restrained. Meanwhile, C is added to make up ingredient changes caused by element evaporation and carbonization of the injection mold under the action of lasers.
Owner:HUAZHONG UNIV OF SCI & TECH
Surface-treated copper foil low-dielectric substrate and copper-clad laminate and printed wiring board using the same
InactiveUS6969557B2Excellent low dielectric constantHigh peel strengthInsulating substrate metal adhesion improvementPrinted circuit aspectsDielectric substrateCopper foil
The invention provides a surface-treated copper foil which can sufficiently ensure adhesive strength with a low-dielectric substrate used in forming a printed wiring board for high-frequency applications and can minimize transmission losses. There is provided a surface-treated copper foil for a low-dielectric substrate which is used in bonded relationship to a low-dielectric substrate, which is characterized in that a nodular-treated layer constituted by bump-like copper particles is formed on a surface of the copper foil and that ultrafine copper particles are caused to precipitate on the whole surface of the nodular-treated layer and adhere thereto and the roughness value Rz of the surface is 1.0 to 6.5 μm. The surface color of the surface-treated copper foil has L* of not more than 50, a* of not more than 20 and b* of not more than 15. A passivated layer containing at least one kind selected from the group consisting of zinc and nickel is provided on surfaces of the ultrafine copper particles which are caused to precipitate on the whole of the surfaces of the bump-like copper particles of the nodular-treated layer and adhere thereto.
Owner:MITSUI MINING & SMELTING CO LTD
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