161results about How to "Improve bonded state" patented technology

A multi-layer ceramic capacitor includes a multi-layer unit, a side margin, and a bonding unit. The multi-layer unit includes ceramic layers and internal electrodes. The ceramic layers are made of first ceramics and laminated in a first direction, the first ceramics having a first average crystal grain diameter. The internal electrodes are disposed between the ceramic layers. The side margin is made of second ceramics and covers the multi-layer unit from a second direction orthogonal to the first direction, the second ceramics having a second average crystal grain diameter. The bonding unit is made of third ceramics and disposed between the multi-layer unit and the side margin, the third ceramics having a third average crystal grain diameter that is larger than the first average crystal grain diameter and the second average crystal grain diameter.

The invention discloses an ultrasonic-assisted laser material additive manufacturing device, which comprises a precise double-shaft numerical control rotating table, a support fastening base, a mold, an ultrasonic device, a base plate and a powder supply spray nozzle, wherein the precise double-shaft numerical control rotating table mainly consists of a double-support rotating table and a processing table; the support fastening base is arranged on the processing table; the mold is arranged on the support fastening base and is provided with a groove; the ultrasonic device is arranged in a way of passing through the processing table and the support fastening base and is connected with the bottom of the mold; the base plate is arranged in the groove formed in the mold; the powder supply spray nozzle is positioned above the base plate. The invention also provides a realization method of the ultrasonic-assisted laser material additive manufacturing device. The ultrasonic vibration is transmitted to the base plate, so that the base plate generates resonance; ultrasonic vibration stirring is performed in a molten pool formed under the laser effect in the laser material additive manufacturing process; a cavitation effect and a mechanical effect are generated; the combination state between layers can be improved; the formation probability of microsegregation and air holes inside forming elements can be reduced; meanwhile, crystal grains are refined; the residue stress is reduced; the forming elements with the good mechanical property are obtained.

The invention relates to a preparation method of a high heat-conducting diamond/copper-based composite material which consists of matrix copper, diamond powder and a molybdenum coating, wherein the volume fraction of molybdenum is 1-2%, the balance of diamond particles and copper. In diamond and copper, the volume fraction of the diamond powder is 15-50%. The preparation method provided by the invention can solve the problem that in methods of infiltration, powder metallurgy and the like, diamond powder and copper are non-wetting to lead to sintering densification. The preparation method comprises the following steps: I, plating molybdenum on the surfaces of the diamond particles by adopting a magnetron sputtering method to prepare molybdenum-coated diamond powder; II, plating copper on the surface of the molybdenum-coated diamond powder by a chemical plating method to prepare copper and molybdenum-coated diamond powder; III, mixing the composite powder obtained in step II and pure copper powder in a certain proportion by a mechanical mixing manner; and IV, hot pressing and sintering the mixed powder prepared in step III in vacuum to obtain the diamond/copper-based composite material. The material has a good interface bonding condition, high density and heat conductivity.

A method for constructing rubber particles asphalt concrete road surfaces relates to a method for constructing asphalt concrete road surfaces, aiming to resolve the problems that: the asphalt concrete road surfaces have weak wear-resistant, and the attachment coefficient and the adhesive force are reduced and vehicles have the problem of braking stability when the road surfaces are covered by snow and ice. The construction method comprises the following steps that: compositions by weigh percentage of the following materials are adopted: 76.5 to 91.5 percent of mineral aggregate, 2.5 to 7.5 percent of asphalt, 4 to 10 percent of mineral powder and 2 to 6 percent of rubber particles; the mineral aggregate is heated up to 190 to 200 DEG C, the rubber particles are added into the mineral aggregate with mixing about 20 to 25 seconds, the asphalt heated up in advance and the mineral powder are added into the rubber particles and the mineral aggregate with mixing lasting for 70 to 80 seconds, and then the road surfaces are subject to the pavement, the first stage initial pressure, the first and the second stage re-pressure and the second stage final pressure. The invention can increase the deformation capabilities of the road surfaces effectively, improve the bond state between the road surfaces and snow, and the invention can improve the attachment coefficient, increase the adhesive force, and improve the braking and turning operation stability of vehicles when the road surfaces are cover by snow and ice.

The utility model belongs to field of solar battery, and relates to a manufacturing approach of flexible nanometer-crystalline film of dye sensitizing solar battery, which adopts nanostructured porous TiO2 powder as the material and forms the porous TiO2 film by depositing on a conducting substrate by vacuum deposition. The utility model is characterized in that a porous TiO2 film is made by vacuum cold coating, wherein the nanostructured porous TiO2 powder is accelerated by airflow and impacts on the substrate or the TiO2 coat at a high speed to speed up the combinations of the powder under the pressure of high speed impact at instantaneous high temperature rise; therefore the coat is combined well with the substrate and so are the grains in the coat. The film made by the above approach dose not need to go through high temperature process during manufacturing and after manufacturing, therefore is suitable for manufacture of flexible nanometer-crystalline film of dye sensitizing solar battery.

The invention discloses a centrifugal ceramic composite vertical mill roller sleeve and a manufacturing method thereof. The centrifugal ceramic composite vertical mill roller sleeve comprises an inner layer and an outer layer. The outer layer is high-chromium cast iron, and ceramic particles are embedded in the outer layer. The high-chromium cast iron is prepared from, by weight, 2.3-3.3% of C, 0.3-1.0% of Si, 0.6-1.2% of Mn, 18-22% of Cr, 0.7-1.7% of Ni, 1.5-3.0% of Mo, 0-0.03% of P, 0-0.03% of S and the balance Fe and inevitable impurities. According to the vertical mill roller sleeve, the material proportion of the inner layer and the outer layer is optimized; high-alloy elements are adopted by the outer layer, the matrix can be effectively reinforced by increasing the content of alloy such as C, Cr, Mo and V, the total amount of carbide is increased, and therefore the smoothness of a friction surface can be effectively improved; the outer layer of the roller sleeve is made to be high in abrasion resistance, high in strength and enough in toughness, and the service life of the roller sleeve is effectively prolonged. According to the manufacturing method, a heat treatment technique of annealing, quenching and tempering is adopted, the purposes of improving the carbide form, promoting structural transformation and refining structures are achieved, so that the abrasion resistance and fracture toughness of the roller sleeve are improved.

The invention provides a qualitative and quantitative defect detection method for a thin-walled centrifugal concrete steel tube tower. The method comprises the following steps: S1, introducing an advanced phased array defect imaging detection technology into steel tube pole weld joint detection, accurately judging the property, size and severity of defects, and achieving nondestructive evaluationof standard exceeding defects of a steel tube pole; S2, studying the influence of the welding temperature on the performance of the thin-walled centrifugal concrete steel tube tower; S3, testing the bonding condition of a concrete-filled steel tube by means of nondestructive testing; S4, determining a safety evaluation method for the allowable defect size of a defect-containing thin-walled centrifugal concrete steel tube tower; and S5, researching reinforcement schemes for the defect-containing thin-walled centrifugal concrete steel tube tower; and checking the strength of the defect-containing thin-walled centrifugal concrete steel tube tower under different reinforcement schemes, and comparing and analyzing the feasibility and economy of the different reinforcing schemes.

The invention discloses a method for preparing phenolic resin system Z-pin by using twisted carbon fibers, wherein reinforcing materials for extruding and forming the Z-pin are the twisted carbon fibers with twist degree of 80-100 t/m. The method uses the twisted fibers to generate pressure on a resin matrix to restrain the growth of bubbles in phenolic resin, and modifies the defect of generation of air holes in the Z-pin products due to volatilization of phenolic resin curing products. The obtained Z-pin products can be used for reinforcing ablation-resisting and heat-preventing composite materials of a carbon fiber/phenolic resin system, and prominently modify the stripping resistance and the scouring resistance.

The invention discloses a manganese dioxide/copper foam sodium ion battery self-supporting negative pole preparation method. The method comprises the steps that flake copper foam is treated with absolute ethyl alcohol, washed to be clean and dried, and an electrode substrate is obtained; a manganese sulfate solution of a certain concentration is prepared; the obtained solution and a copper foam sheet are put into a hydrothermal reaction kettle, heating and heat preservation are conducted for a certain time through hydrothermal induction heating equipment, and then the manganese dioxide/copper foam sodium ion battery self-supporting negative pole with a three-dimensional porous communicating frame-shaped structure is obtained.

The invention relates to a rubber particle asphalt pavement material and a method for paving the rubble particle asphalt road surface, in particular to an asphalt pavement material and a method for paving the asphalt road surface. The invention solves the problems that the prior asphalt road surface does not possess the capability of inhibiting condensation of ice and snow on the road surface or removing ice and snow; adopting other methods for removing snow on the road causes the problems of environmental pollution, low utilization rate of equipments, influence on traffic capacity of working road, high energy consumption, high cost, complex process and difficult maintenance. The rubber particle asphalt pavement material is prepared with 76.5 to 91.5 portions of ore aggregate, 2.5 to 7.5 portions of asphalt, 4 to 10 portions of mineral powder, and 2 to 6 portions of rubber articles by weight portions. The method for paving the road surface comprises that I. the ore aggregate, the asphalt, the mineral powder and the rubber particles are weighed; II. the mixture of the rubber particles and the asphalt is prepared; and III. the mixture of the rubber particles and the asphalt are stirred, paved and rolled. The road surface of the invention can effectively inhibit the condensation of ice and snow on the road surface, and facilitate the following mechanical snow removal as well as road surface management and maintenance. The invention has low cost in road pavement and improvement effects in service performance of the road.

The invention provides a high-entropy alloy resistant to high-temperature oxidation, a thermal barrier coating and a preparation method thereof. The AlCoCrFeNiTaHfY high-entropy alloy is prepared by adding alloy elements Fe, Ta and Hf into NiCoCrAlY. The designed high-entropy alloy contains Fe and Hf and has high Ta content, the configurational entropy of the high-entropy alloy is higher than 1.5R, and the high-entropy alloy has the general characteristics of high-entropy alloy. The alloy is simple in phase structure and is of a BCC and FCC double-phase structure without complicated intermetallic compound precipitated phases. Compared with the NiCoCrAlY, the thermal barrier coating provided with the high-entropy alloy as a bonding layer exhibits a lower heat generation oxide increase rateunder a 1,150 DEG C cyclic oxidation condition; an oxide layer of the high-entropy alloy is uniform and dense and is well combined with an alloy substrate; and the high-entropy alloy has the potentialof serving as a bonding layer material.

The invention provides a glass fiber reinforced PA6 composition and a preparation method thereof. The glass fiber reinforced PA6 composition is prepared from 30-60 parts of PA6, 1-10 parts of PA66, 25-45 parts of glass fibers, 0-5 parts of a flexibilizer, 5-10 parts of a nucleating agent and 5-10 parts of a surface improver through mixing and extrusion granulation. By utilizing short-cut glass fibers with a rectangular cross section, a fiber floating phenomenon can be reduced; and besides, the short-cut glass fibers are mutually matched with nylon 66 and the surface improver to ameliorate the surface fiber floating caused after the injection molding of a glass fiber reinforced PA6 material and improve the mechanical property and compressive property of the glass fiber reinforced PA6 composition.

The invention discloses a sintered aluminum electrolytic capacitor ultrahigh-voltage anode foil and a preparation method thereof. The preparation method comprises the following steps: 1) mixing spherical aluminum powder with a solvent and an adhesive to prepare aluminum powder slurry; 2) selecting an aluminum foil base material, and coating the surface of an anode foil with the aluminum powder slurry, and carrying out vacuum drying treatment after coating; 3) sintering the coated and dried aluminum foil; and 4) performing low-voltage to ultrahigh-voltage anodic oxidation treatment after the sintering process, and obtaining the sintered aluminum electrolytic capacitor anode foil after the final anodic oxidation process. The aluminum powder slurry is prepare from high-purity aluminum powder,the solvent and the adhesive, and the surface of the aluminum foil substrate is uniformly coated with the slurry for sintering under certain conditions, so that the aluminum powder and the aluminum powder and the aluminum powder and the aluminum foil substrate are sintered together to form the three-dimensional porous aluminum foil. The method is simple in process and environmentally friendly, raw materials are saved, and generation of a large amount of acid and alkali waste liquid containing metal ions generated by a traditional corrosion process is avoided.

A low-carbon magnesia carbon brick containing a nanometer zinc oxide is characterized in that the low-carbon magnesia carbon brick comprises the four following raw materials by weight percentage: 80-94wt% of electric melting magnesia particles, 1-5wt% of crystalline flake graphite, 1-3wt% of metal Al and 1-5wt% of nanometer zinc oxide, and 2-4wt% of a phenol formaldehyde resin with the quantity of the weight percentage sum of the four raw materials. The low-carbon magnesia carbon brick utilizes the characteristics of the nanometer zinc oxide powders such as fine granularity, high activity at high temperature, moderate price, and the like to improve the microstructure of the low-carbon magnesia carbon brick, prompts the used metal Al antioxidant to sufficiently play the role and prepares the low-carbon magnesia carbon brick with excellent comprehensive performance and moderate price. The prepared low-carbon magnesia carbon brick can be used for the steel-making furnace, the refining furnace and the lining of the steel ladle in the steel metallurgical industry, reduces the carbon added in the molten steel, reduces the temperature reduction of the molten steel and is beneficial for improving the quality of the steel and saving the energy resource.

A frequency generator with monolithic quartz crystal chips is composed of upper and lower cover plates, crystal chips, pits on said cover plates, and internal and external electrodes. Its preparing process includes such steps as preparing two cover plates with m*n pit array, sticking the crystal chips onto lower cover plate by electrically conductive adhesive, sticking it with upper cover plate, cutting to become product units, and evaporating to form electrodes.

An aluminum nitride bonded body includes: a stick-like attaching body containing aluminum nitride; an attached body containing aluminum nitride, in which a tip end portion of the attaching body is screwed to a support hole; and a bonding layer for bonding the attaching body and the attached body to each other.

The invention discloses a waste paper pulping and papermaking advanced waste water treatment technique, comprising the following steps of: waste water collection, magnetization, first-stage dosing reaction, first-stage precipitation, second-stage dosing reaction, second-stage precipitation and temporary storage of clear water. The technique has the advantages that (1) the technique is based on physicochemical technology, and the design is scientific and reasonable, so that good effect of advanced waste water treatment can be ensured; (2) the technique not only removes organic pollutant and chroma in the waste water with high efficiency, but also greatly reduces the hardness of the waster water and lays foundation for recycling the waste water; and (3) the technique has wide technical applicability and strong shock resistance capability.