33results about How to "Good resistance to mechanical shock" patented technology

The invention provides a microstrip antenna organic composite substrate material and a preparation method thereof, and belongs to the technical field of electronic materials. The organic composite substrate material is compounded from a principal phase material and an auxiliary phase material in mass percent ratio of 100:(80-120); the principal phase material is Co2Z type hexagonal ferrite with a formula molecular formula of (Ba(1-x)Srx)3Co2Fe24O41, wherein x ranges from 0 to 0.5; and the auxiliary phase material is polytetrafluoroethylene resin. The preparation method for the microstrip antenna organic composite substrate material comprises the following steps: (1) weighing, mixing and drying after carrying out primary ball-milling; (2) carrying out pre-sintering; (3) carrying out secondary ball-milling and drying; (4), compounding and drying; and (5) thermally pressing and molding. The method is simple and convenient to operate, and low in cost; the obtained composite substrate material has relatively high magnetic conductivity and a dielectric constant within a frequency range of 100 MHz-1000MHz, relatively low magnetic loss and dielectric loss; and the obtained substrate has relatively good softness and uniformity.

The invention provides an electrical contact based on powdered copper and a preparation process thereof. The electrical contact based on the powdered copper is prepared from the following materials in percentage by weight: 0.3 to 7 percent of nickel, 0.1 to 6 percent of boron, 0.1 to 8 percent of tungsten, 0.2 to 10 percent of graphite, 1 to 7 percent of titanium, 0.1 to 6 percent of molybdenum, 0.1 to 8 percent of diamond, 0.2 to 7 percent of lanthanum, 0.5 to 9 percent of aluminum, 0.5 to 8 percent of niobium, 0.1 to 5 percent of silicon, 0.1 to 6 percent of yttrium, 0.1 to 6 percent of chromium, 0.1 to 5 percent of cerium, and the balance of copper powder. The preparation process comprises the steps of mixing, cold pressing and sintering. In the preparation process, a general silver alloy contact is replaced by copper, so that the cost of silver alloy contacts of electric switches is reduced. The electrical contact based on the powered copper has high electrical performance and mechanical properties, and is a cheap substitute product of silver alloy materials of electrical contacts of low-voltage electric switches.

The invention relates to a bidirectional tempering and thermal runaway anti-diffusion device for an automobile power battery. A plurality of battery mounting holes and fluid through holes are horizontally/vertically formed on a blocked heat-conducting matrix at intervals; a cylindrical battery tightly sleeves inside each battery mounting hole; the axial direction of the battery is vertical to or parallel to the axial direction of the fluid through holes; an inlet confluence slot and an outlet confluence slot which are communicated with the fluid through holes are formed on the heat-conducting matrix; at the two ends of the corresponding fluid through holes, a flat plate type sealing cover plate is respectively coated on each of the outer surfaces on the two opposite sides of the heat-conducting matrix; an inlet of the inlet confluence slot and an outlet of the outlet confluence slot are formed on the positions at the vertical slide of the heat-conducting matrix provided with the cover plate and close to the bottom side of the heat-conducting matrix; and a heat exchanger is communicated with the inlet of the inlet confluence slot and the outlet of the outlet confluence slot, so as to form a heat-conducting fluid circulating heat exchange channel. The device can be used for solving the problems of insufficient heat exchange capability, uneven battery temperature, complex device structure and easiness in interference with a circuit of the present heat management device and can avoid the risk in heat dispersing to the surrounding battery due to thermal runaway.

The invention relates to the technical field of manufacturing of steel plates of thermal-pressure-resistant containers, in particular to a steel plate of a thermal-pressure-resistant container used for a furnace shell and a manufacturing method of the steel plate. The steel plate is prepared from, by mass, 0.12-0.20% of C, 0.10-0.35% of Si, 0.50-0.90% of Mn, 0-0.020% of P, 0-0.005% of S, 0.25-0.35% of Mo, 0.020-0.050% of Alt and the balance Fe and inevitable residual elements. The carbon equivalent of the steel plate is smaller than or equal to 0.43%. The steel plate can be applicable to the environment with the working temperature as high as 500 DEG C and cope with challenges of bad conditions such as high temperature, mechanical shock and thermal stress. In addition, the function of improving the high-temperature performance of steel through the Mo element is brought into play ingeniously, and therefore the steel is still excellent in strength and hardness at a high temperature and can further meet the using requirements in various application fields. The steel plate is stable in performance, high in safety coefficient, low in cost and can also be applied to the field of nuclear power pressure container construction.

The invention relates to an automatic dip angle compensated contact electromagnetic induction waterproof distance measuring pen comprising a waterproof housing (1), a liquid crystal display panel (2), a collection key (3), a contact wheel shaft (4), a hall element (5), a signal amplifier (6), a analog-digital converter (7), a micro processor (8), a digital single-axis gyroscope (9), a display panel drive device (10), a battery (11) and a back clamp (12). The collection key (3) is pressed, the contact wheel shaft (4) rolls on the surface of an object to be measured, the distance between a stripped magnet and the hall element (5) changes regularly, and the strength of the magnetic field surrounding the hall element (5) changes regularly; according to the hall principle, the distance amount is calculated according to the change amount of hall potential difference through the micro processor (8), the change amount of the dip angle of the waterproof housing (1) detected by the digital single-axis gyroscope (9) is combined, the error caused by the change of the dip angle in the measuring process is compensated, and counting is performed through the liquid crystal display panel (2) to achieve the distance measuring purpose. The pen is reasonable in structure, accurate in measurement, convenient to use, high in adaptability, energy saving and environment-friendly.

The invention discloses a preparation process of a polypropylene-modified montmorillonite nano composite material, and relates to the field of wood-plastic materials. The preparation process includesthe step of: preparing modified montmorillonite, drying materials, mixing the materials, performing extrusion molding and granulation on the mixed materials and the like. The composite material is prepared by performing mixing and granulation on polypropylene, wood powder, filler, the modified montmorillonite and a silane coupling agent, and has good weather resistance, corrosion resistance, excellent mechanical shock resistance, excellent fatigue resistance and excellent dimensional stability, and the modified montmorillonite has higher dispersibility, so that the composite stability of the material structure is enhanced.

The invention belongs to the technical field of refractory materials and provides a refractory material for a smelting furnace liner. The refractory material is prepared from quartz sands, electric melting crystal powder, a toughener, a sintering agent, ferric oxide, crystalline flake graphite, magnesia and silica micro powder with a reasonable weight proportion and is prepared by the following steps of mixing and stirring, crushing, primary pelleting, secondary pelleting, modification with toughening and smelting. The refractory material has the advantages of high strength, high softness under load, stability in chemical performance, erosion resistance, long service life, low cost, simpleness in production technology, convenience and safety in use and short time for repairing the furnaceliner. In addition, in the formula of the refractory material, the toughener is adopted for modification, the modified refractory material has good toughening effect, and refractory material powder can be endowed with the characteristic of high toughness.

The invention belongs to the technical field of refractory materials and discloses a fiber toughened refractory material. The material is mainly prepared from raw materials in parts by weight as follows: 40 parts of magnesium oxide, 85-95 parts of calcium oxide, 5-7 parts of toughening fiber, 1-3 parts of a granulation binder and 0.5-1.0 part of a forming binder. The refractory material adopts the reasonable raw material proportion, the refractory performance is higher, and the coat can be reduced properly; the fiber toughened refractory fiber has higher fracture toughness and better mechanical shock resistance.

The invention relates to a ceramic fiber combined packing block for packing a water beam of a steel rolling heating furnace and a packing method. The ceramic fiber combined packing block comprises more than one group of packing blocks surrounded on the periphery of the water beam of the heating furnace, the water beam of the heating furnace comprises a water pipe at the furnace bottom of the heating furnace and a sliding block, the ceramic fiber combined packing block is characterized in that each group of the packing blocks comprise a hard ceramic fiber water beam packing block A and a hard ceramic fiber water beam packing block B which are processed and molded by hard ceramic fiber and are symmetrically meshed and connected, the inner sides of the packing blocks are in close contact with the sliding block and the outer wall of the water pipe at the furnace bottom of the heating furnace, fastener mounting holes are formed at the upper parts and lower parts of the hard ceramic fiber water beam packing blocks A and B, fasteners are respectively assembled in the upper and lower fastener connecting holes of the hard ceramic fiber water beam packing blocks A and B for combining and assembling the hard ceramic fiber water beam packing blocks A and B into one group of the hard ceramic fiber combined water beam packing blocks, and all groups of the hard ceramic fiber combined water beam packing blocks are tightly connected and packed on the outer side of the water beam of the heating furnace according to the length of the water beam of the heating furnace.

The invention relates to a cable, and discloses a fireproof insulated cable. The fireproof insulated cable comprises at least one conductor, each conductor is wrapped by a first insulated layer, the one or more conductors wrapped by the first insulated layers are wrapped by ceramic short fiber layers, magnesium oxide mineral substance insulated powder is arranged between the first insulated layers and between the insulated layers and the ceramic short fiber layers, and each ceramic short fiber layer is sequentially wrapped by a copper jacket, a second insulated layer and a fireproof layer; the fireproof layers comprise, by weight, 30%-50% of inorganic base stocks, 20%-40% of environment-friendly fire retardants, 10%-30% of organic polymer and 5%-10% of fireproof pigment. By means of the fireproof insulated cable, double-layer insulation is adopted, and the insulation performance of the cable is greatly improved; the fireproof layers are additionally arranged, and the safety performance of the cable is greatly improved.

The invention provides a refractory material with enhanced toughness, and relates to the field of refractory materials. The refractory material with enhanced toughness comprises quartz sand, calcium oxide, magnesium oxide, manganese oxide, titanium oxide, niobium pentoxide, toughened fibers, tantalum pentoxide, a granulation binder and a forming binder, and specifically comprises 60 parts of the quartz sand, 8-10 parts of the calcium oxide, 6-8 parts of the magnesium oxide, 2-3 parts of the manganese oxide, 3-4 parts of the titanium oxide, 1-2 parts of the niobium pentoxide, 10-15 parts of thetoughened fibers, 1-1.5 parts of the tantalum pentoxide, 2-3 parts of the granulation binder and 0.5-0.7 part of the forming plasticizer. The refractory material with enhanced toughness is modified by adopting a toughening agent, and the modified refractory material has a good toughening effect. High fracture toughness of the refractory material is improved, and better mechanical impact resistance is achieved. Meanwhile, the mixture is treated by adopting a secondary granulation method, so that distribution of the toughened fibers, the granulation binder and the forming binder can be relatively concentrated in a small range.

The invention discloses a high-safety electrolyte and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The electrolyte comprises the following components in percentage by mass: 70 to 90 percent by weight of an electrolyte organic solvent, 5 to 20 percent by weight of lithium salt, 0.1 to 10 percent by weight of a film-forming additive and 0.1 to 10 percent by weight of a composite additive. The preparation method of the electrolyte comprises the steps of removing water from an electrolyte organic solvent and an additive; (2) placing the electrolyte organic solvent with the water being removed in a water-free and oxygen-free glove box to prepare a blank solvent; and (3) adding a lithium salt, a film-forming additive and a composite additive into the blank solvent, and stirring in the glove box for 3-5 hours to prepare the high-safety electrolyte. The battery assembled by adopting the electrolyte is good in flame retardant effect, better in mechanical shock resistance and relatively high in safety performance, and the electrolyte is stable in performance, simple in preparation method and suitable for large-scale industrial production and has a very good application prospect.

The invention discloses a preparation method of an unshielded microcrystalline ceramic backboard based on 5G communication signals, and the method comprises the following steps of: respectively weighing high-purity Y2O3 powder, high-purity Gd2O3 powder and high-purity ZrO2 powder as raw material powder, adding a dispersing agent, a plasticizer and a binder, and carrying out ball-milling mixing; performing filtering, then directly carrying out tape casting, carrying out self-defined cutting and stacking on the obtained biscuit, carrying out temperature isostatic pressing and shaping on the obtained green body, and performing degreasing; and carrying out vacuum sintering on the degreased green body, performing natural cooling to room temperature, then adding the green body into liquid nitrogen, performing preserving for a period of time, taking out the ceramic from the liquid nitrogen, directly putting the ceramic into a vacuum sintering furnace, performing sintering again, conducting natural cooling to room temperature, and then performing annealing to obtain the microcrystalline ceramic backboard. The microcrystalline ceramic backboard prepared by the method is excellent in performance, does not shield 5G communication signals, has good jade texture and gloss after being polished, and is low in preparation cost and simple in preparation process.

The invention discloses a meso-porous silica, a catalyst for vapor phase carbonylation of propylene to butyraldehyde with the meso-porous silica as a carrier, a preparation method of the meso-porous silica, and a preparation method of the catalyst. The preparation method of the meso-porous silica comprises the following steps: 1, carrying out a reflux reaction on bromohexadecane and tetramethylethylenediamine in a 80-90DEG C water bath to obtain a carrier template C16-2-C16; and 2, dissolving the carrier template C16-2-C16 in water, adding a silicon source, adjusting the pH value to 4.5-5.5, carrying out heating crystallization, drying granular solids, carrying out high temperature roasting at 500-550DEG C to remove the carrier template C16-2-C16 in order to obtain the meso-porous silica (SiO2). The catalyst comprises the carrier, and a catalytic activity substance and an assistant which are supported on the carrier, wherein the catalytic activity substance is acetylacetonatodicarbonyl rhodium, and the assistant is triphenyl phosphine. The meso-porous SiO2 material has the advantages of large specific surface area, stable structure, good heat stability, and superior mechanical impact resistance. The catalyst has a stable catalysis performance.