48results about How to "Effect of mechanical strength" patented technology

The invention discloses a three-dimensional connected honeycomb porous calcium phosphate ceramic artificial bone material. A plurality of longitudinal straight-through holes are distributed in the calcium phosphate ceramic artificial bone material in a honeycomb manner; and a plurality of transverse through holes are distributed in the hole walls of the straight-through holes to connect the adjacent straight-through holes. The invention also discloses a preparation method of the three-dimensional connected honeycomb porous calcium phosphate ceramic artificial bone material. The three-dimensional connected honeycomb porous calcium phosphate ceramic artificial bone material is prepared once through an extrusion molding technology and a pore forming agent adding technology. The straight-through holes are helpful for growing newborn bone tissues and forming blood vessels, and the three-dimensional connected holes are helpful for connecting cells into pieces and facilitate transportation of nutrient substances and discharging of metabolites. The preparation method is simple and can realize continuous production; and the prepared porous calcium phosphate ceramic has the advantages of high porosity, high connectivity and good mechanical performances.

The invention relates to a manufacturing method for a cover layer of a semiconductor device interconnected structure. The manufacturing method comprises the following steps: providing a semiconductor device interconnected structure matrix provided with interlevel dielectrics; forming a bottom cover layer on the interlevel dielectrics; forming a first sandwich layer in the bottom cover layer; and forming a top cover layer on the bottom cover layer and the first sandwich layer. Correspondingly, the invention also provides the cover layer of the semiconductor device interconnected structure. The invention adopts a compound medium layer as the cover layer of the semiconductor device interconnected structure, improves the mechanical strength of the whole interconnected structure and ensures that a chip is not easy to break in the use process. While further improving the mechanical strength of the whole interconnected structure, the metal material with higher thermal conduction in the cover layer can easily and timely dissipate heat generated in the working process of the chip so as to ensure that the chip cannot be burned down due to overhigh temperature and ensure the working efficiency and the stability of the chip.

The invention relates to a wear-resistant low-floating fiber glass fiber-reinforced polyphenylene sulfide composite material and a preparation method thereof. The composite material comprises 45-85wt% of polyphenylene sulfide resin, 5-45wt% of glass fibers, 1-15wt% of wear-resistant anti-floating fiber master batches, 0.1-1.5wt% of an anti-oxidant, 0.1-1wt% of a coupling agent, 0.3-1.5wt% of a compatilizer and 0-2.5wt% of other auxiliary agents. The wear-resistant anti-floating fiber master batch comprises 65-95wt% of polyphenylene sulfide resin, 1-25wt% of molybdenum disulfide, 1-25wt% of graphite, 0.1-1wt% of an anti-oxidant, 0.1-2wt% of a compatilizer and 0-2.5wt% of other auxiliary agents. The composite material can eliminate floating fiber-caused influence on product appearance, reduce a wear-resisting agent use amount and improve wear resistance. The preparation method has simple processes and high production efficiency.

The application discloses a surface correction structure and correction method of a semiconductor structure. The surface correction structure comprises a back film and a stress layer adjacent to the back film. The back film is arranged on the surface of the semiconductor structure and is adjacent to the surface of the semiconductor structure. According to the correction structure, a flat surface is provided for the follow-up cover layer and the correction structure is suitable for surface warping with various directivity, so that the yield and reliability of the semiconductor device are improved.

The invention relates to a catalyst for preparing ethylene glycol through dimethyl oxalate gas phase hydrogenation. The catalyst comprises the following components, by mass: 20-70 wt% of CuO, 25-79 wt% of SiO2, and 1.0-5.0wt% of oxide of a metal auxiliary agent. The catalyst has a specific surface area of 100-500m<2>/g, a pore volume of 0.3-1.5mL/g, and a pore size of 1.0-15.0nm. According to the invention, a pore-expanding agent and an environment-friendly auxiliary agent are added during a preparation process, such that the pore structure of the catalyst is effectively improved. When the prepared catalyst is used in a reaction for preparing ethylene glycol through oxalate gas phase hydrogenation, catalyst activity and ethylene glycol selectivity can be effectively improved; catalyst bed layer temperature can be stabilized; impurity generation can be significantly inhibited; no adverse influence is caused on the mechanical strength of the catalyst; and the wear resistance of the catalyst is improved. The service life of the catalyst can be longer than 1 year, such that the needs of industrial production can be satisfied.

The present invention relates to a galactosyl grafted-modified alginate hydrogel microsphere carrier preparation method. According to the present invention, the occupation on the hydroxyl site of alginic acid does not affect the gelation performance of the alginic acid, such that the embedding type hydrogel microsphere carrier with characteristics of good sphericity and good stability can be prepared from the galactosyl alginic acid being subjected to the grafting reaction, and can further be subjected to the film forming reaction with polycations to form the galactosyl alginate/polycation microcapsule.

The invention discloses a waterproof and dampproof gypsum board and a preparation method thereof, and relates to the technical field of novel building materials. The gypsum board is prepared from the following raw materials in parts by weight: calcined desulphurization gypsum, Faku clay, laumontite powder, polyimide fiber, sodium bentonite, silicone polyether emulsion, dimethyl sulfoxide, methyl chlorostearate, a starch adhesive, a waterproofing agent, an activator, a foaming agent and a water reducer. The preparation method of the waterproof and dampproof gypsum board comprises the steps: adding water into the raw materials stage by stage, uniformly mixing and aging the raw materials, and performing pouring, preforming and drying operation, thus obtaining the waterproof and dampproof gypsum board. By improvement and optimization of the production raw materials and the process, a finished product board is high in waterproof and dampproof property, so that reduction of the mechanical strength of the board and deterioration of an indoor environment can be prevented; the service life of the gypsum board is prolonged; and the gypsum board is higher in reliability and safety and suitable for being popularized and applied.

The invention belongs to combustion engine crank box, which is a crank box for the vibration damping motorcycle engine, made up of left crank box and the right crank box, the character lies in: the left and the right crank boxes use magnesium alloy to be cast and formed, the thickness of the box wall is 3.5-6mm, several reinforcing ribs with width of 3-5mm are arranged on the box surface and the cover. Compared to the gearing aluminum alloy crank box, when the structure intensity of the box is upgraded, the heat irradiating area is also increased, it can reduce the high temperature creep, the mechanical intensity of the magnesium alloy crank box in the high temperature environment is not affected; the experience to the same motorcycle LC125 testifies, the crank box of the invention caters all the demands of engine, and the weight is reduced, thus it can save 0.4l oil per hundred kilometers, the average heat vibration and noise only the 1/3 of the traditional crank box.

The present invention belongs to the field of preservatives, and particularly relates to a wood preservative, which comprises, by weight, 2-15% of a quaternary ammonium salt compound of boron, 2-6% of triazole, 3-10% of acetic acid, 5-15% of lignin, 2-6% of a silicon resin, and the balance of deionized water, wherein the quaternary ammonium salt compound of the boron is at least one selected from a dimethyldidecyl boron tetrafluoride quaternary ammonium salt (DBF), a boron tetrafluoride quaternary ammonium salt, an alkoxy methyl decyl dimethyl boron tetrafluoride quaternary ammonium salt and a nitrate. According to the present invention, the wood preservative has characteristics of long-term efficiency, uniform action, no trace on the wood surface, no toxicity on human and animals, no environmental pollution or destruction, and no influence on mechanical strength, good texture and good color.

The invention relates to the technical field of road inspection well construction, in particular to a road inspection well and a manufacturing process and a construction method thereof. The concrete is prepared from the following raw materials: Portland cement, medium sand, super absorbent resin, pebbles, a fiber mixture, fly ash, an expanding agent, a polycarboxylate superplasticizer, gravel-typegranules, montmorillonite powder, attapulgite, a retarder, an early strength agent and water. The fiber mixture is used as a raw material for preparing the road inspection well, wherein the fiber mixture is formed by mixing polypropylene fibers and steel fibers according to a certain proportion, as a result, the polypropylene fibers and the steel fibers are matched with each other to effectivelyreduce the volume shrinkage phenomenon of the road inspection well in the early stage, and the anti-cracking performance of the road inspection well is improved; and moreover, proper vibration compaction treatment is carried out on the concrete during pouring, so that the compactness and the uniformity of the concrete are improved and guaranteed, the crack resistance and the bearing capacity of the road inspection well are remarkably improved, and the service life of the road inspection well is effectively prolonged.

The invention provides surface-modified high-activity low-temperature denitration active coke and a preparation method thereof. The denitration active coke is activated and surface-modified, the maincomponent of the denitration active coke is a forming material of carbonized coal and natural manganese ore, and sulfur-containing functional groups and sulfate which mainly provide acidic adsorptionsites are formed on the surface of the forming material through surface modification. According to the invention, the problem of low nitrogen oxide removal rate of an existing denitration active cokeproduct in an adsorption-dominated denitration mode can be solved, the nitrogen oxide removal rate of the active coke product is improved through the dual effects of chemical catalysis and adsorptiondenitration, and the requirement of low-temperature denitration can be better met.

The invention relates to an automatic spaceflight high-pressure inflation and deflation system and method. The system comprises a gas adding module, a gas driving module and a control module. The gas adding module comprises a first standard gas cylinder, a target gas cylinder and a gas adding pipeline, and a booster pump is arranged on the gas adding pipeline; the two ends of the gas adding pipeline are connected with the first standard gas cylinder and the target gas cylinder correspondingly, and the gas adding pipeline is used for adding gas in the first standard gas cylinder into the target gas cylinder. The gasdriving module is connected with the booster pump through a driving gas pipeline; a pressure detection assembly, a pressure adjusting assembly, a temperature detection assembly and a temperature adjusting mechanism are arranged on the gas adding pipeline, the pressure detection assembly is used for collecting a first gas pressure signal in the gas adding pipeline and sending the first gas pressure signal to the control module, and the temperature detection assembly is used for collecting a temperature signal of the gas adding pipeline and sending the temperature signal to the control module; the control module controls the pressure adjusting assembly to enable the inflation pressure change rate of the gas adding pipeline to be within a preset safety range. The control module regulates and controls the temperature of the gas adding pipeline to be within a preset temperature range.

The invention discloses a machining device for a matt cable. The machining device comprises a sand blasting box, a centrifugal chamber and a high-pressure gas source. A sand guide pipe and a high-pressure gas pipe are arranged in the sand blasting box. The centrifugal chamber is arranged above the sand blasting box and communicated with the sand guide pipe. The high-pressure gas source is communicated with the high-pressure gas pipe. A cable inlet and a cable outlet are formed in the two sides of the sand blasting box respectively. Multiple baffles are arranged at the portion, between the cable inlet and the cable outlet, in the sand blasting box and distributed criss-cross in the cable conveying direction. One side of each baffle is provided with at least one spray gun, spray openings of the spray guns face the baffle faces, close to the conveyed cable, of the baffles, gaps allowing the cable to pass are reserved between the spray guns and the baffle faces of the baffles, each spray gun is provided with two inlets, one inlet of each spray gun is connected with the sand guide pipe, and the other inlet of each spray gun is connected with the high-pressure gas pipe. By the adoption of the machining device, the baffles are arranged criss-cross in the cable conveying direction, so that the situation that the cable swings and shakes due to blasting force in the sand blasting process, the sand blasting face is uneven, and conveyance is unstable is avoided.

The invention discloses a flotation column which comprises a spraying water component, a feeding system, a column component and a gangue system, and further comprises a taper column bottom of the flotation column and a plurality of flotation column aerators, wherein the taper column bottom of the flotation column is located on the lower part inside the flotation column; the plurality of flotation column aerators are installed on the taper column bottom; the flotation column aerators are vertically installed at different height positions of the taper column bottom of the flotation column and are distributed along a plurality of circumferences of the taper column bottom of the flotation column. The flotation column aerators are distributed on the plurality of circumferences at different height positions of the taper column bottom of the flotation column, so that the distribution quantity of the aerators in a cross section of a column body is controlled according to the needed air flow and the size of the cross section of the flotation column of a selected process, dispersion degree of gas injected in the column is high; and the flotation column aerators are longer in service lives and stable in work performance under protection of wear-resisting steel tubes.

The invention relates to a blend optical film with thermodynamic stability and a preparation method thereof. The blend optical film comprises the following components in parts by weight: 15-85 parts of methacrylate polymer, 14.5-80 parts of aromatic polycarbonate and 0.5-5 parts of stabilizer. The preparation method of the blend film comprises the following steps: pretreating the raw materials, preparing and refining the coating liquid, coating to form a film, thermally stretching the film, thermally shaping the film and the like. When the methacrylic acid polymer is greater than 50%, a film hot stretching step needs to be added in the steps of coating film formation and film heat setting so as to improve the toughness of the film. The method is simple in formula and process, industrial production is easy to realize, and the colorless and transparent blend optical film with thermodynamic stability can be prepared. The blend optical film provided by the invention not only has excellentoptical characteristics of the methacrylate copolymer, but also has excellent heat resistance and toughness of aromatic (co) polycarbonate, and still shows a stable thermodynamic compatibility state at a high temperature.

The present invention relates to a redispersible powder composition for use in the preparation of dry mortar formulations, especially of cementitious bound tile adhesives (CBTA). The invention further relates to a dry mortar formulation comprising said redispersible powder composition. Furthermore, the invention is directed to a method of increasing the open time of a dry mortar formulation without deteriorating the mechanical strength of the cured dry mortar formulation.

The invention provides a flexible toughening composition. The flexible toughening composition comprises the following components in parts by weight: 50-70 parts of epoxy resin A, 20-35 parts of a curing agent A, 5-15 parts of dihydric alcohol, 0.2-0.8 part of a curing accelerator A, 0.1-0.5 part of a coupling agent and 10-20 parts of inorganic nanoparticles, the toughening type epoxy resin adhesive is prepared from the following components in parts by weight: 5-20 parts of the flexible toughening composition, 35-58 parts of epoxy resin B, 25-45 parts of a curing agent B and 0.2-0.6 part of a curing accelerator B. The invention also provides preparation methods of the flexible toughening composition and the toughening type epoxy resin adhesive. The flexible toughening composition provided by the invention has no obvious adverse effect on the high temperature resistance of the material and the bonding performance of the metal substrate while obviously improving the toughness of the epoxy resin adhesive.

The invention discloses a three-phase doubly salient motor with non-uniform stator pole width distribution. The three-phase doubly salient motor comprises a stator iron core, a rotor iron core, an excitation element, an armature winding and a rotating shaft, and is characterized in that the rotor iron core is arranged inside the stator iron core, the rotating shaft is arranged inside the rotor iron core, the excitation element is arranged at the yoke part of the stator iron core, the armature winding is wound on the stator pole of the stator iron core, a rotor pole is arranged on the rotor iron core, the pole width of the stator pole is unevenly distributed, the pole width of the rotor pole is evenly distributed, the maximum pole width dmax of the stator pole is equal to the pole width of the rotor pole, the minimum pole width dmin is two thirds of the pole width of the rotor pole, the rotor iron core and the stator iron core are both of a salient pole structure, the number of the rotor poles is 4N, the pole-arc coefficient of the rotor is 0.5, the number of the stator poles is 6N, and N is a positive integer. According to the invention, approximate sine of the induction electromotive force of the armature winding of the doubly salient motor is realized, so that the doubly salient motor can adopt sine wave power supply, the torque ripple of the doubly salient motor is reduced, and the iron core loss of the motor is reduced.

The invention discloses an antibacterial finishing auxiliary of a woolen sweater. The antibacterial finishing auxiliary comprises a preprocessing protein solution and finishing liquor. The preprocessing protein solution is prepared from, by mass, 0.05-0.09% of hydrolyzed feather meal, 0.02-0.05% of corn gluten meal and 0.8-1.0% of trehalose. The finishing liquor is prepared from, by mass, 60-81 g/L of phosphorus-containing polymaleic acid, 32-38 g/L of sodium hypophosphite and 0.8 g/L of polyoxyethylene fatty acid. The finished woolen sweater has a quite good antibacterial effect, can resist pilling, and has no influences on the whiteness and mechanical strength of the woolen sweater.