35results about How to "Effective mechanical support" patented technology

The invention discloses a Zn-Li series zinc alloy as well as a preparation method and application thereof. The Zn-Li series zinc alloy comprises Zn and Li; and based on weight percent, the mass percent content of the Li in the zinc alloy accounts for 0 to 30%, but not including 0. The preparation method of the Zn-Li series zinc alloy comprises the following steps: (1) mixing the Zn and the Li to obtain a mixture; (2) treating the mixture according to the following step a) or step b) and then cooling the mixture to obtain the zinc alloy: a) under the protection of a CO2 and SF6 atmosphere, carrying out smelting or sintering on the mixture; and b) under the protection of a vacuum atmosphere, dissolving hydrogen gas into the mixture and carrying out the smelting. The zinc alloy prepared by the preparation method disclosed by the invention has an excellent mechanical property and can provide a long-term effective supporting force in vivo; and the zinc alloy has excellent cellular compatibility, blood compatibility and tissue and organ compatibility and can be used for preparing biomedical implant materials.

The invention provides a method for achieving eutectic soldering of chips. The method comprises the steps of a, compressible areas in the chips are determined, and a photoetching mask panel is manufactured; b, conducting adhesives in the compressible areas of the chips are removed through a photoetching develop method on a gilded ceramic wafer; c, ball points, used as protruding points, are planted at the position, where the adhesives are removed, on the ceramic wafer through a gold ball bonding method; d, the ceramic wafer is cut into small ceramic wafers consistent with the chips in size through a gear cutting method; e, a tool locating clamp is manufactured according to the shapes of cavities to be welded, and a small ceramic wafer pressing block clamp with gold protruding points makes contact with non-circuit areas of the chips through the protruding points; f, a pressing block is arranged on the small ceramic wafer pressing block clamp, and vacuum compressible soldering of the chips is indirectly achieved. The gilded ceramic wafer is used as the base material, the mature photoetching technology and the ball-bonding ball planting technology are used for manufacturing the protruding points to provide effective mechanical support for soldering, and the method is wide in application range.

The invention discloses a Zn-Li-Mg-system zinc alloy and a preparation method and application thereof. The zinc alloy comprises, by weight, 0-1% of Li, 0-1% of Mg and the balance Zn, wherein the masspercents of Li and Mg are not zero. The zinc alloy prepared by the preparation method is excellent in mechanical performance, can provide long-term and effective supporting force in a body, has excellent cellular and blood compatibility, and can be applied to preparation of biomedical implants.

The invention discloses a Zn-Li-Mn-based zinc alloy and a preparation method and application thereof. The Zn-Li-Mn-based zinc alloy comprises, by mass, greater than 0 and less than or equal to 1% of Li, greater than 0 and less than or equal to 1% of Mn and the balance of Zn. The Zn-Li-Mn-based zinc alloy has excellent mechanical properties, can provide long-term effective support in the human body, has excellent cell compatibility and blood compatibility and can be used for preparation of biomedical implants.

The invention provides a gas chamber structure for gas sensing and a manufacturing method of the gas chamber structure. The gas chamber structure comprises an outer wrapping layer (1), a reflection layer (2) and a hollow core structure (3). The outer wrapping layer is located on an outermost layer, and the outer wrapping layer is a polymer outer wrapping layer. The reflection layer is an omni-directional reflection layer, and the omni-directional reflection layer is located on the inner side of the polymer outer wrapping layer. The inner side of the omni-directional reflection layer is provided with the hollow core structure, and the hollow core structure is a hollow channel for light and gas transmission. The gas chamber structure provided by the invention can solve the problems that an existing metal gas chamber is heavy, excessively large in size and difficult to couple and cannot be microminiaturized, and overcome the shortcomings that an existing optical fiber type gas chamber ispoor in mechanical performance, weak, single in material and incapable of covering an infrared wave band. Meanwhile, the processes of a thermal evaporation method, a thin film winding method, a hot drawing method and a coating method are used for preparing the flexible, low-loss and easy-to-couple microminiaturized gas chamber structure for gas sensing.

The invention relates to the technical field of graphene materials and particularly relates to a transparent conductive composite film comprising a graphene film and a poly-p-xylylene film, wherein the poly-p-xylylene film is arranged on one surface of the graphene film. The transparent conductive composite film has the beneficial effects that the transparent conductive composite film is provided; the graphene film is supported by the poly-p-xylylene film, so that the tight molecular contact between the poly-p-xylylene film and graphene can be realized; and an effective mechanical supporting effect on graphene is taken under pi-pi coupling action, so that the thermal vibration of graphene can be remarkably inhibited, furthermore, the electrical property of graphene is stabilized, and the service performance of graphene is greatly improved.

The invention provides a medically degradable Zn-based composite and a preparing method and application thereof. The Zn-based composite is composed of, by mass percent, 50.1 to 99.9% of zinc and 0.1 to 49.9% of microelement. The microelement comprises one or multiple of Fe, Ag, Ti and Cu. The method comprises the steps of according to the proportion, zinc powder and powder containing the microelement are mixed evenly; the mixed powder is pressed and formed at the pressure of 5 to 50 MPa, and a blank is obtained; the blank is placed in a mold to be pressurized and sintered; and the pressurizedand sintered material is subjected to heat treatment, finally, extrusion forming is carried out, and the medically degradable Zn-based composite is obtained. When the Zn-based composite is applied tothe degradable medical equipment implant, the requirement of the mechanical property can be met, and the degrading speed can be regulated.

The invention belongs to the technical field of roads and bridges, and particularly relates to a protection device for a bridge pier during tide ebbing and flowing and a construction method. The protection device for the bridge pier during tide ebbing and flowing provided comprises a bridge pier fixedly arranged on a pier platform; a bridge body is arranged on the bridge pier; protection devices are arranged on the front side and the rear side of the bridge pier; each protection device comprises two side protection plates fixedly arranged on a protection body; the two side protection plates extend outwards in a radial shape; an included angle is formed between the two side protection plates; and one ends of the two side protection plates are in butt joint together or the extension lines ofthe two side protection plates intersect. According to the protection device for the bridge pier during tide ebbing and flowing and the construction method, the protection devices are arranged at thefront side and the rear side of the bridge pier, and can block and distribute rising and falling seawater during tide ebbing and flowing, so that the safety of a bridge is protected, and the servicelife of the bridge is prolonged.

The invention belongs to the technical field of road bridges, and particularly relates to a defense device capable of achieving protective effect on bridge piers and a construction method. The defensedevice capable of achieving protective effect on the bridge piers provided by the invention comprises a defense body arranged at the upstream position of each bridge pier, wherein the defense body comprises a protective plate; a plurality of exploding devices towards a water flow direction are arranged on the protective plate; center positions of pressure discs in the exploding devices are provided with firing pin bins; firing pins capable of moving downwards are arranged in the firing pin bins; disc type springs for supporting the pressure discs are arranged in detonating shells; and the lower sides of the firing pins are equipped with detonators for detonating high explosives. Drifting objects which drift down from middle and upper reach of a river are blocked and distributed, and exploding devices can explode blocked large-size objects, so that the purposes of prolonging the service life of a bridge and guaranteeing bridge safety are realized.

The invention relates to preparation of polyester/periodic mesoporous bone-filling composite material with a fluorescently-labeled degradation rate, a product and application. The preparation comprises the steps of firstly, synthesizing rare-earth periodic mesoporous nanoparticles with fluorescence performance, then, subjecting the rare-earth periodic mesoporous nanoparticles to chemical modification by taking poly-L-lactic acid with low molecular weight as a modifier, and finally, adding the modified nanoparticles into a polyester matrix by a solution blending method. The invention further provides the product obtained by the method and application of the product in bone restoration as a composite bone filling material. The fluorescent mesoporous material obtained by the method provided by the invention is uniformly dispersed in an organic matrix, mechanical properties of a polyester are improved greatly, and the degradation behavior of the composite bone filling material can be monitored in real time. The preparation process is simple, and the composite bone filling material can serve as a bone filling material of load bearing bone parts with relatively high performance index requirements. The obtained composite material can meet the requirements of clinical application.

The invention discloses a preparation method for a joint prosthesis thigh bone prosthesis. The method comprises the following steps of generating holes or slots on a joint prosthesis thigh bone prosthesis body via various processing methods, and building column projections, spherical projections or other stereoscopic shaped-projections in the holes or the slots via additive manufacturing technology. A lockmaking action can be achieved between implantation material and a bone tissue, so an ideal spatial structure can be provided for growth of new bone; bone tissue cell adhesion and proliferation abilities can be improved and great bone combination can be realized; fusion property between joint prosthesis thigh bone prosthesis and self-tissues can be enhanced; the joint prosthesis can effectively play a role for long time in a human body; and the joint prosthesis thigh bone prosthesis has excellent mechanical property and high mechanical strength, can decrease stress block and maintain effective mechanical support.

The present invention provides a method of eutectic soldering of a chip in a big pad. The method includes the following steps: step (a), determining the size of an L-shaped ceramic location clamp according to the size of the pad; step (b), determining the size of a ceramic locating pressing block according to the sizes of the pad and the chip; step (c), cutting the L-shaped ceramic locating clamp in the corresponding size by using a laser; step (d), cutting the ceramic locating pressing block in the corresponding size by using a grinding wheel cutting machine; step (e), during the process for locating the chip, first fixing the pad by using the L-shaped ceramic locating clamp, then putting the ceramic locating pressing block into the pad, and finally putting a soldering lug and the chip onto the pad; and step (f), after fixing the chip by the locating clamp, putting the chip into a vacuum eutectic furnace to perform eutectic soldering by using a soldering fixture. The method effectively solves a problem of dislocation between the chip and the pad, and the method is easy, and has a low cost and a high feasibility.

The invention relates to an artificial spinal canal for preventing spinal nerve compression. The artificial spinal canal comprises an artificial spinal canal body, a transverse connector and a fixingdevice, wherein the artificial spinal canal body is connected with the fixing device through the transverse connector. The artificial spinal canal for preventing spinal cord nerve compression has theadvantages that the artificial spinal canals suitable for different segments are designed according to the shape and size of the spinal canal of different segments of the human spine, the artificial spinal canal is subjected to one-staged placement around a dural sac of the corresponding segment together after tumor tissue around the dural sac is subjected to excison by posterior spinal operation,the artificial spinal canal is finally fixed with the fixing device by the transverse connector for stabilization, compression on the dural sac and spinal cord nerves due to tumor recurrence, scar hyperplasia and the like can be effectively prevented in 360 degrees by the support function of the artificial spinal canal, and adhesion between the surrounding scar tissue, the dural sac and nerve roots can also be effectively prevented.

The invention discloses a graphene oxide-butyronitrile latex composite foam material and a preparation method thereof, and belongs to the technical field of composite material preparation, and the preparation method comprises the following steps: (1) uniformly mixing a graphene oxide dispersion liquid and butyronitrile latex to prepare a mixed dispersion liquid, and adjusting the pH value of the mixed dispersion liquid; (2) freezing the mixed dispersion liquid and then performing vacuum freeze drying to obtain a composite foam matrix material; and (3) heating and crosslinking the composite foam matrix material to prepare the graphene oxide-butyronitrile latex composite foam material. The graphene oxide and the butyronitrile latex are fully dispersed and mixed by controlling the electrostatic interaction between the graphene oxide and the butyronitrile latex, so that the phenomenon of uneven agglomeration and dispersion of the graphene oxide is improved; by controlling the concentration and freezing temperature of the graphene oxide solution, the sizes and structures of the cells are regulated and controlled; by controlling the heating temperature and the heating time, the graphene oxide is decomposed at high temperature to release free radicals to initiate high-temperature self-vulcanization crosslinking of the butyronitrile latex, and it is guaranteed that the composite foam has high compression strength.