36results about How to "Avoid associativity" patented technology

The invention relates to a porous bioceramic with calcium phosphate nanorods on the surface layer and a formation method for the same, belonging to the field of biomaterial. In the method, the porous bioceramic with calcium phosphate nanorods on the surface layer is formed by hydrothermal process, and the calcium phosphate nanorods on the surface layer of the porous bioceramic are formed by extensional growth on the substrate surfaces with same or similar chemical compositions of calcium phosphate porous ceramic. Therefore, the calcium phosphate nanorods obtained on the surface of the porous bioceramic are closely and integrally connected with the substrates of the calcium phosphate porous ceramic. Compared with traditional calcium phosphate porous ceramic, the porous bioceramic formed by the method disclosed by the invention is high in bioactivity and mechanical strength; moreover, the formation method is simple, high in repeatability and capable of realizing large-scale production.

The invention relates to a surface grafting modified aramid fiber and a preparation method of the fiber. The method comprises the following steps of: mixing gamma-glycidoxypropyltrimethoxysilane with the aramid fiber with amino on the surface, placing the above mixture into a mixed solution of gamma-methacryloxypropyltrimethoxylsilane and another alkoxy silane, adding deionized water and an organic solvent into the resulting product, and carrying out cleaning and drying after the reaction ends to obtain hyperbranched polysiloxane modified aramid fiber, wherein the surface of the obtained fiber is connected with methacryloxy and another active functional group through chemical bonds. The surface of the fiber provided by the invention not only has the group capable of resisting strong ultraviolet irradiation, but also has the active functional group with high reactivity, as well as is improved in interface bond performance with a resin matrix; the types of the active functional groups can also be changed by regulating process conditions to adapt to reactions with a plurality of different resin matrixes to obtain a plurality of composite materials with outstanding comprehensive performance; and the fiber provided by the invention has the characteristics of high flexibility, strong controllability and wide application field range.

The invention discloses a process for improving the corrosion-resisting property of magnesium alloy by utilizing subzero treatment. The process comprises solution treatment, aging treatment and subzero treatment. Compared with the prior art, the invention adopts the magnesium alloy subzero treatment process to realize the purpose of improving the corrosion-resisting property of magnesium alloy base metal, and avoids the defects that the bonding force is poor, coating is damaged and the like when surface coating treatment is adopted.

An in situ synthesis graphene oxide / porous ceramic composite membrane preparation method comprises the following steps: (1) a silane coupling agent is added into an organic solvent for the preparation of a silane modified solution, and the volume ratio of silane coupling agent to organic solvent is 2-5:30-50; (2) a porous ceramic support is put into the silane modified solution for standing for 2-10 hours, under the condition of the temperature of 30-85 DEG C, the porous ceramic support is taken out from the silane modified solution to obtain a silane modified porous ceramic support; (3) the silane modified porous ceramic support is put into a reaction liquid for Hummers method preparation of graphene oxide, a graphene oxide / porous ceramic composite membrane with the thickness value of 80-300 nm is prepared by controlling of the reaction temperature and reaction time, and the graphene oxide / porous ceramic composite membrane is taken out from the reaction liquid, and is died by standing at room temperature to obtain an in situ synthesis graphene oxide / porous ceramic composite membrane.

The invention discloses a preparation method, product and application of BiOI / WO3 heterojunction efficient photoelectrocatalysis electrodes, and particularly relates to that a hydrothermal method is adopted firstly. WO3 films grow in situ on FTO, bismuth nitrate, potassium iodide, anhydrous ethanol and p-benzoquinone are used for preparing an electro-deposition solution according to certain raw material ratio, the electrodeposition of the BiOI is conducted on the WO3 in the electro-deposition solution to prepare the BiOI / WO3 heterojunction photoelectrocatalysis electrodes. By changing the timeof electrodeposition, BiOI / WO3 heterojunction electrodes with different shapes and thicknesses are obtained. According to the preparation method of the BiOI / WO3 heterojunction efficient photoelectrocatalysis electrodes, the prepared BiOI / WO3 heterojunction electrodes have higher activity of photoelectrocatalysis degradation of organic wastewater than pure WO3, and the preparation method has the characteristics of easy availability of raw materials, simple production processes, and the like, the heterojunction photoelectrocatalysis electrodes can be used circularly without causing secondary pollution.

The invention provides a metal ceramic composite material for a brake pad of a new energy automobile and a preparation method thereof, and relates to the field of brake pad materials. The metal ceramic composite material comprises, by weight, 40-60 parts of alloy powder, 1-3 parts of titanium powder, 2-5 parts of zirconium diboride, 5-10 parts of titanium nitride, 5-10 parts of aluminum nitride, 5-10 parts of tungsten carbide, 5-10 parts of silicon carbide, 20-30 parts of aluminum oxide, 1-5 parts of molybdenum disulfide, 10-18 parts of graphene, 6-12 parts of aciform wollastonite, 4-8 parts of boron-cashew phenol modified phenolic resin, 3-7 parts of modified aramid fiber, 5-10 parts of carbon fiber modified with long chain silane coupling agent, 8-16 parts of polyxylene, 5-10 parts of polystyrene, 30-50 parts of nitrile rubber powder, 20-30 parts of ethylene-propylene-diene monomer powder and 10-15 parts of maleic anhydride grafted ethylene propylene diene monomer rubber. The metal ceramic composite material has good wear resistance, the overall performance index is in a reasonable change range, the heat dissipation performance is good, and the service life is long.

The invention discloses multi-material photocuring 3D printing equipment, and belongs to the technical field of 3D printing. The multi-material photocuring 3D printing equipment comprises a forming platform, an integrated nozzle extrusion mechanism, a coating spreading mechanism and a photocuring mechanism, wherein the integrated nozzle extrusion mechanism is arranged above the forming platform, comprises a plurality of extrusion nozzles and a plurality of charging barrels corresponding to the extrusion nozzles, discharge ports of the charging barrels communicate with the extrusion nozzles through conveying pipes, the coating spreading mechanism is arranged on one side of the forming platform, and the photocuring mechanism is arranged above the forming platform; and different kinds of printing materials are sequentially stacked on the forming platform through the plurality of extrusion nozzles, the stacked printing materials are evenly spread through the coating spreading mechanism, and the photocuring mechanism provides a light source for curing the printing materials and enables the printing materials to be polymerized and formed by adjusting a light path. The multi-material photocuring 3D printing equipment can achieve integral manufacturing of large-size multi-material parts, is easy to operate, can avoid mutual pollution of different materials, is high in interface bonding performance of formed heterogeneous materials, and is suitable for preparing heterogeneous and multi-level structure heterogeneous materials.

The invention discloses a steel rim vehicle wheel surface phosphating treatment method and relates to the technical field of steel treatment. The method comprises: (1) grinding, (2) cleaning, (3) plasma treatment and (4) phosphating treatment. The method can well protect the steel rim vehicle wheel surface, improve the film forming stability, greatly improve the compactness and uniformity of the phosphated film, realize high phosphated film adhesion, improve the corrosion resistance and wear resistance of the surface of the steel rim vehicle wheel surface, realize high phosphated film purity,facilitate precipitate removal, shorten the conventional high-temperature surface phosphating treatment time, realize fast phosphating treatment at the normal temperature, prevent heating, solve the problem that the conventional high-temperature phosphating treatment method easily causes phosphated film impurities and precipitates difficult to remove, and improve the phosphating efficiency.

The invention relates to the field of building thermal insulation materials, in particular to honeycomb thermal insulation mortar as well as a manufacturing method and a using method thereof. The raw material formula of the honeycomb thermal insulation mortar comprises the following ingredients in parts by weight: 110-130 parts of silica powder, 5-6 parts of silica aerogel, 13-15 parts of polyphenyl granules, 3.8-5.8 parts of dispersible emulsion powder, 0.12-0.19 part of HPMC (hydroxy propyl methyl cellulose), and 3-3.5 parts of a foaming agent. The honeycomb thermal insulation mortar has the beneficial effects that the fireproof performance reaches the class A, the thermal conductivity is lower than 0.035 W / (m.k), the traditional thermal insulation mortar can be replaced, the safety performance of building fire protection is added, and an effect of building energy conservation is enhanced; the manufacturing method and the using method are simple, and problems existing in the prior art are economically and effectively solved.

The invention discloses a water-soluble polymer, and a preparation method and application thereof, which belong to the field of functional polymers and application thereof. The preparation method comprises the steps of adopting 9, 10-dihydroanthracene-9, 10-alpha, beta-maleic anhydride and monofuctional polyether amine as raw materials; feeding inert gas; and after warming and reacting, diluting by adding water to prepare the water-soluble polymer. The water-soluble polymer prepared by the invention has multiple functions of aromatic nucleus, carboxyl, amidogen, a hydrophobic end and the like, so that the defects of weak combination of a dispersing agent and a pigment, poor system stability, high viscosity and the like can be avoided, the processing capacity of the water-soluble polymer with multiple pigments at the same time is outstanding, and the water-soluble polymer has wide universality in a water-based paint and has an excellent viscosity reducing effect.

The invention provides an electronic transmission system of a train marshalling sequence table, which comprises a handheld terminal, a railway intranet and a communication network used for supportingthe handheld terminal to communicate with the railway intranet, and the electronic transmission of the train marshalling sequence table is realized through the cooperation of the communication networkand the railway intranet. A driver can directly download the train grouping sequence table needing to be checked through the handheld terminal, the process of manually printing the operation system 1and conducting manual transmission in a railway station is omitted, bill transmission personnel are not needed any more, the cost of paper printing and manual transmission is avoided, and the problems of loss, wrong handover and other joint parts are avoided.

The invention discloses a semiconductor production method. A lead frame and a copper bridge frame having positioning holes are provided; the surface of the lead frame is printed with a bonding material; punching is carried out on the lead frame with the bonding material printed so as to form positioning teeth plugging with the positioning holes cooperatively; and the lead frame and the copper bridge frame are assembled and the lead frame and the copper bridge frame are welded by means of reflow soldering. Because punching is carried out after printing of the bonding material at the lead frame and then the positioning teeth are formed, welding positioning of the copper bridge frame is realized by plugging of the positioning teeth with the positioning holes of the copper bridge frame, thereby overcoming defects like the position deviation caused by reflow soldering of the copper bridge frame, protecting the copper bridge frame from being affected during the reflow soldering process, and improving the product yield. Moreover, the positioning teeth forming by punching is done after bonding material printing, so that the production difficulty can be reduced.

The invention discloses a titanium metal ceramic preparation process. According to a technical scheme: an hierarchical carburizing technology is employed to conduct surface high temperature carburizing on Ti6Al4V alloy to prepare titanium carbide ceramics on the surface and form a thick carburized layer, thus preparing the titanium alloy metal ceramic with superior biological friction performance and affinity performance. The process provided by the invention is characterized in that: the hierarchical carburizing technology is employed to conduct surface high temperature carburizing on Ti6Al4V alloy to prepare titanium carbide ceramics on the surface and form the thick carburized layer, thus preparing titanium metal ceramics.

The invention discloses a receiver pulse signal interference evaluation method based on an error rate. The method comprises the following steps: S1, determining an error rate calculation formula of a receiver under pulse signal interference; s2, preparing two groups of receiving antennas of which the working frequencies cover the passband of the receiver, wherein one group of receiving antennas is connected with a broadband oscilloscope, and the other group of receiving antennas is connected with a spectrum analyzer; s3, processing the data received by the broadband oscilloscope and the spectrum analyzer and obtaining the pulse period, the pulse width and the received signal to interference ratio of the unknown pulse signal when being interfered by the unknown pulse signal; s4, estimating the bit error rate value of the receiver under the pulse interference according to the bit error rate calculation formula obtained in the step S1; and S5, evaluating the disturbed degree of the receiver according to the predetermined relationship between the bit error rate and the working efficiency of the receiver and the estimated error rate. According to the method, the interference degree of the pulse signal on the receiver is objectively quantified, and the effectiveness of the evaluation result is ensured.

The invention, which relates to the technical field of the semiconductor packaging structure, provides a packaging structure of a condensation type ultraviolet emission device, comprising a substrate, a light-emitting cup, an ultraviolet emission chip and a lens, the incident plane of the lens is a plane, and the light-emitting surface is a convex surface. An annular flange extending in the direction away from the lens is arranged on the peripheral face of the end, used for making contact with the light outlet cup, of the lens, a first annular boss extending towards the base is arranged on the edge, away from the lens, of the annular flange, a first annular groove is formed in the end face, provided with the light outlet, of the light outlet cup, and the first annular boss extends into the first annular groove. The inner wall of the first annular boss abuts against the side wall of the first annular groove, the bottom face of the first annular boss abuts against the bottom face of the first annular groove, the inner wall of the first annular boss is connected with the side wall of the first annular groove in an adhesive mode through an adhesive, and the bottom face of the first annular boss is connected with the bottom face of the first annular groove in an adhesive mode through an adhesive mode. According to the scheme provided by the invention, the transmission distance of ultraviolet rays and the stability of a product structure can be improved.

The invention relates to the technical field of top cover and oil cylinder connecting structures, in particular to a hydraulic oil cylinder top cover and oil cylinder connecting structure which comprises an oil cylinder body, an oil cylinder top cover body is arranged on the outer surface of the upper end of the oil cylinder body, and inner hexagon screws which are evenly distributed are arranged on the outer surface of the upper end of the oil cylinder top cover body. The oil cylinder body is fixedly connected with the oil cylinder top cover body through an inner hexagon screw, and a movable rod is movably connected to the outer surface of the upper end of the oil cylinder top cover body in a penetrating and sealing mode. Through the arrangement of the first connecting groove, when oil starts to enter the oil cylinder body, due to the fact that the temperature of hydraulic oil is about 70 DEG C, substances such as carbon dioxide and air which are prone to expanding after being heated are contained in the first air bag, and the first air bag is made of a silicon rubber material, the problem that in the prior art, when thread loosening is solved through thread fixing and locking glue is avoided; and the problem that the screw thread or the surface of the combined part is possibly damaged after the screw thread or the combined part is disassembled is solved, and the overall practicability is improved.

The invention relates to the field of building thermal-insulation materials, particularly a honeycomb thermal-insulation mortar and a production line mixing device thereof. The honeycomb thermal-insulation mortar is prepared from the following raw materials in parts by weight: 110-130 parts of silicon micropowder, 5-6 parts of silicon dioxide aerogel, 13-15 parts of polystyrene granule, 3.8-5.8 parts of dispersible latex powder, 0.12-0.19 part of cellulose hydroxypropyl methyl ether and 3-3.5 parts of foaming agent. The fire resistance of the honeycomb thermal-insulation mortar reaches Grade A; the heat conductivity coefficient is lower than 0.035W / (m.k); and thus, the honeycomb thermal-insulation mortar can substitute the traditional thermal-insulation mortar to increase the fireproof safety performance of the building and enhance the energy-saving effect of the building. The manufacturing and application methods are simple; and the production device is simple in structure, implements intelligent control, is suitable for industrial production, and solves the problems in the prior art in an economical and effective way.

The invention discloses a die casting moulding die which comprises an upper die and a lower die. The upper die is arranged above the lower die, a cavity is arranged at the bottom of the upper die, a mandrel is arranged at a position, corresponding to the center of the cavity, of the lower die, a pouring port is arranged above the cavity, a pouring guide way is arranged above the pouring port, and the cavity is communicated with the pouring port which is communicated with the pouring guide way. By arranging a riser or a cooling layer with a through hole, combining marks and air bubbles of products can be avoided, number of cracking and being not fully moulded of the products is reduced, processing speed of the die can be increased, poured blanks can be cooled at a same time, and product production efficiency and product quality can be improved effectively.

The invention discloses a cement grinding aid, and belongs to the technical field of cement process additives. The grinding aid is prepared from, by weight, 40-60% of carboxylic acid polymer, 3-6% ofpolyhydric alcohol, 2-5% of a complexing enhancing substance, 2-5% of glycidyltrimethylammonium chloride, 1-3% of calcium formate, 2-5% of sodium p-benzylaminobenzenesulfonate, and the balance of water. The product is good in grinding assisting effect, capable of remarkably improving the grinding efficiency of cement, wide in application range, good in adaptability to cement taking fly ash, mineral slag, coal gangue, furnace slag and the like as mixed materials, and suitable for various Portland cement, fly ash cement, mineral slag cement and pozzolanic cement.

The invention discloses a rapid preparation method for a brake material based on polycarbosilane modification. According to the method, a low-temperature hot pressing and liquid silicon infiltration combined process mode is adopted, a low-temperature hot-pressing process takes short carbon fibers as a reinforcing body, phenolic resin serves as a matrix, polycarbosilane serves as a modified additive material, low-temperature cold pressing and carbonization treatment are carried out so as to prepare a blank, and then liquid silicon infiltration, machining and surface treatment are carried out soas to obtain a carbon ceramic friction material finished product. The preparation method has the advantage that the service life of the brake material is greatly prolonged.

The invention provides a micro-nano layer-shaped copper / copper alloy composite board and a preparation method thereof. Copper and copper alloy boards with the thickness ranging from 0.5 mm to 2 mm are stacked in a multi-layer manner, then the copper and copper alloy boards are tightly welded together through a thermal diffusion welding treatment means, then the thickness of the boards is reduced to 10 mm or below through a forging treatment process, and finally, the micro-nano layer-shaped copper / copper alloy composite board / foil is obtained through a traditional rolling technology. Compared with the prior art, layers of the board are firmly combined, the number of layers and the thickness of the board are controllable, and the thickness of the composite board can reach the thickness of a foil.

The invention discloses supporting formwork-free thick coating type cement-based repair mortar and a construction method thereof. The supporting formwork-free thick coating type cement-based repair mortar is prepared from the following components in parts by weight: 30-40 parts of ordinary portland cement, 30-40 parts of river sand, 5-20 parts of an expansion component, 1-5 parts of a wet densityregulating component, 2-8 parts of an anti-sagging component, 1-5 parts of rubber powder, 0.1-1 part of a thickening agent, 1-5 parts of a coagulation regulating component, 1-5 parts of an early strength component and 0.01-0.05 part of chemical short fibers. The supporting formwork-free thick coating type cement-based repair mortar is developed by adopting a common portland cement-river sand system through methods such as aggregate grading optimization, admixture wet density regulation and control and anti-sagging admixture composite control technologies, has a better anti-falling effect, doesnot need the supporting formwork in the construction process, and has a thicker single construction layer (5-10 cm).

The invention provides an intermediate glaze used for ceramic. The concentration of the intermediate glaze used for ceramic in glazing reaches 68 to 72 DEG Be, the sintering temperature ranges from 1120 to 1150 DEG C in glazing, and the intermediate glaze used for ceramic comprises 51.0 to 51.5 parts of SiO2, 7.8 to 8.0 parts of Al2O3, 5.5 TO 5.7 parts of K2O, 1.9 to 2.0 parts of Na2O, 10.4 to 10.6 parts of CaO, 1.8 to 2.0 parts of MgO, 0.9 to 1.1 parts of P2O5, 1.4 TO 1.5 parts of B2O3, 9.0 to 9.1 parts of ZnO, and 9.5 to 9.7 parts of ZrO2. After sintering of the intermediate glaze, obtainedglaze surfaces are smooth, and are soft in visual effect, no glaze accumulation, sagging, or glaze hanging is caused, and no fine pore is formed.

The invention relates to the technical field of performance research of a pump, and discloses a phosphating treatment method for fastener surface of a pump body. Due to the particularity of the outerelectronic structure of rare earth elements, each rare earth element is provided with a large ionic radius, is easy to polarize and deform, and is easily adsorbed on the surface of the substrate metal, so that more active points are provided, more crystalline nuclei are formed, and the phosphorylation process is accelerated. The formation speed of the phosphating film reaches 0.7 to 0.8g / (m2.min),and the phosphating crystals are refined and dense to increase the corrosion resistance of the film. The phosphating additive increases the percentage of reactive molecules in the phosphating solution and the thermal motion of the reacting molecules, and avoids the problem of excessive coarsening of the phosphating film and poor binding force due to excessive temperature, and the obtained phosphate film is 2.5-2.8g / m2, uniform and dense.

The invention relates to a preparation process of a chip-type fixed resistor with good stability. The preparation process comprises the following steps: cutting a resistor body according to a specified technological size, and respectively transversely and longitudinally arranging slots on the upper surface and the lower surface of the resistor body; printing a negative electrode on the back surface of a base plate substrate, wherein the negative electrode is arranged on a transverse cutting line between a longitudinal cutting line and through holes adjacent to the longitudinal cutting line as well as transverse cutting lines among the through holes; printing a positive electrode on the front surface of the base plate substrate, and performing the molding processing by aligning the positive electrode to the negative electrode; and then molding, washing and nickel plating to obtain the chip-type fixed resistor. By adopting a way for printing a surface electrode on the positive electrode of the base plate substrate, the surface electrode can sufficiently fill and cover the part of the front electrode on the transverse cutting lines, so that a coated conductive layer is firmly combined with the back surface electrode and the surface electrode, and the stability of the resistor is better.

Disclosed are a bonding structure, a bonding method and a packaging box body containing the bonding structure; the bonding structure comprises a quantum chip and a PCB; the PCB is used for being bonded with the quantum chip, an opening is formed in the PCB, and the length, the width or the diameter size of the opening are smaller than the corresponding size of the quantum chip; the quantum chip islocated below the opening of the PCB and makes contact with the PCB; the upper surface of the first part of the quantum chip is exposed through the opening, and the upper surface of the second part is shielded by the PCB on the edge of the opening. The size of the opening is smaller than that of the quantum chip, so that the quantum chip can be in additional contact with the PCB from the back surface of the PCB, the area where the quantum chip makes contact with the PCB can be used for grounding or signal connection, the wiring area on the front surface of the PCB is effectively saved, and the overall bonding strength is improved; and in addition, the phenomenon that the chip and a sample box base are not firmly combined and the heat contact between the chip and the base is poor during installation when a chip is placed from the front surface of the PCB can be avoided.

The invention discloses a preparation process for a steel-cast roller. High-alloy steel of a working layer of the roller is in fully metallurgical bonding with graphitic steel of a core part of the roller. The high-alloy steel comprises, by weight, 0.5% of C, 0.5% of Si, 0.5-0.6% of Mn, 4.5% of Cr, 1.1% of Ni, 0.7% of Mo, 0.04% of Re, less than or equal to 0.03% of P, less than or equal to 0.03% of S, and the balance Fe; the graphitic steel comprises, by weight, 1.5% of C, 1.8% of Si, 0.5% of Mn, 0.6% of Ni, less than 0.2% of Cr, less than 0.3% of Mo, less than 0.03% of P, less than 0.03% of S, and the balance Fe. By means of the preparation process for the steel-cast supporting roller, the obtained roller has the advantages that the abrasion resistance and the toughness of the working layer of the roller are good, the anti-accident ability is high, the service life is long, and accordingly the manufacturing cost of the roller is reduced.

The invention relates to the technical field of production of modified asphalt waterproof coiled materials, in particular to a production process of a modified asphalt waterproof coiled material. A large block of isolation materials which are combined or adhered can be scattered. The process comprises the following steps that firstly, a base tire is flatly spread; secondly, asphalt is poured on the base tire in the conveying and moving process of the coiled material; and thirdly, when the base tire poured with the asphalt passes through a spreading device, the spreading device spreads a powdery or sheet-shaped isolation material on the surface of the asphalt and compacts the isolation material.

The invention discloses a colored anti-skid pavement paving material, which comprises a base material and a colored glass anti-skid aggregate, and is characterized in that the base material is prepared from the following components in percentage by weight: 30 percent of 601 type prepolymer resin, 10 percent of 602 type prepolymer resin, 2.5 percent of toner, 57 percent of calcium carbonate, 0.5 percent of dispersing agent, 0.1 to 0.3 percent of accelerant, 0.1 percent of stabilizer, and 0.1 percent of antioxygen; the weight of the colored glass non-slip aggregate is 30 to 50 percent of the weight of the base material. The anti-skid aggregate subjected to coating is premixed in the high-fluidity base material, so that the aggregate can maintain favorable fluidity while organically combining with the base material to form a whole structure, one-time forming and paving processes can be realized, potential quality hazards, such as unevenness of aggregate distribution, poor combination of the aggregate and the base material, and impurity pollution, easily caused by the existing process are avoided, the anti-skid pavement paving quality is ensured to the greatest extent, and the problems that the existing colored anti-skid pavement paving process is low in efficiency, great in waste and high in cost, and mechanical construction cannot be adopted can be fundamentally solved.