282 results about "Titanium metal" patented technology

The invention discloses a preparation method of a bionic cornea stroma lens for refractive correction, which comprises the following steps: solution preparation: dissolving type I collagen in an acetic acid solution, adding a film aid, fully stirring, and centrifugally defoaming to obtain a type I collagen composite solution; the I-type collagen composite solution is poured into an assembling groove, the curvature radius of titanium metal is set to be 6.8-8.0 mm, the titanium metal serves as a working electrode material, platinum metal serves as a counter electrode material, current parameters are set according to the needed thickness of the lens blank, the density is 3.50-6.50 mA / cm < 2 >, and the thickness of the lens blank is set to be 3.50-6.50 mA / cm < 2 >; a high-transparency cornea embryo material which is uniform in curvature in all directions and similar to human cornea fiber structure arrangement is formed after electrochemical assembly and cross-linking curing, accurate cutting machining is carried out through excimer laser, a concave / convex matrix lens with the needed correction degree is obtained, the correction precision is high after cornea interlayer implantation, and the correction precision is high. And meanwhile, the compound has excellent performance in the aspects of in-vivo stability and biological safety.

The invention discloses a carbon nano tube reinforced tungsten carbide titanium metal ceramic material as well as a preparation method and application thereof, and belongs to the field of metal ceramic materials. According to the invention, a spark plasma coupling high-frequency induction sintering method is adopted, CNTs are uniformly dispersed in a material matrix through a method of dispersing CNTs through dry ball milling again, and the uniformly dispersed CNTs improve the discharge environment, reduce the sintering current and reduce the energy consumption under the spark plasma coupling high-frequency induction effect in the sintering process. The high-compactness, high-strength and high-wear-resistance (W, Ti) C-based metal ceramic material is prepared at the sintering temperature of 1350 DEG C by utilizing the ultrahigh conductive complementary effect of the (W, Ti) C metal ceramic material and the CNTs.

The present application relates to the technical field of image processing, and particularly relates to an image enhancement method and system for titanium metal surface detection. The method comprises the following steps: converting a titanium metal surface image to be processed from an RGB space to an HSI space, obtaining a luminance component, decomposing an initial reflection component into a plurality of high-frequency sub-band coefficients and a low-frequency sub-band coefficient, determining anisotropy degrees of each pixel point, generating an anisotropy saliency map, enhancing the high-frequency sub-band coefficients corresponding to the pixels with anisotropy degrees higher than a preset threshold, otherwise, inhibiting, reconstructing an enhanced reflection component by using the adjusted high-frequency sub-band coefficients and the low-frequency sub-band coefficient without processing, obtaining an enhanced luminance component, converting the enhanced luminance component back to the RGB space, and outputting a final enhanced image. That is, the scheme of the present application can obtain an enhanced image with a clear defect contour, few artifacts and preserved original color information, greatly improving the accuracy and reliability of subsequent automatic defect recognition.

The invention relates to the technical field of batteries, and discloses a battery and a battery pack. The shell comprises a shell main body and a cover plate, at least one end of the shell main body is provided with an opening, the cover plate covers the opening and is electrically connected with the battery cell, the cover plate comprises a plurality of laminated plate bodies, the plate body far away from the battery cell is a first plate and the plate body close to the battery cell is a second plate along the lamination direction of the plurality of plate bodies, the first plate comprises a non-titanium metal element, and the second plate comprises a non-titanium metal element. The second plate comprises a titanium element, the conductivity of the metal element is larger than that of the titanium element, the ratio of the thickness d of the first plate to the thickness e of the second plate is a, the resistivity of the cover plate is b, the content of the titanium element in the second plate is c%, and the requirement that c * b / a is larger than or equal to 11 and smaller than or equal to 130 is met. By controlling the relationship among the content of titanium, the ratio of the thickness d of the first plate to the thickness e of the second plate and the resistivity of the cover plate, the over-current capability of the cover plate is improved, the resistance in the current transmission process is effectively reduced, and the temperature rise of the cover plate is prevented from being increased.

The invention relates to the technical field of titanium metal smelting, in particular to a precise sponge titanium distillation production process which comprises the following steps: after the sealing performance of an assembled reactor is qualified, heating the first to fourth areas of a distillation furnace to 1000-1050 DEG C; a vacuum unit composed of a roots pump and an oil diffusion pump is opened, the vacuum degree is accurately controlled in the 15th hour, the 30th hour, the 45th hour, the 60th hour, the 75th hour, the 90th hour and the 105th hour in the distillation process, the corresponding vacuum degree ranges are 3000-3500Pa, 1000-1200Pa, 400-450Pa, 50-80Pa, 30-50Pa, 10-15Pa and 3-7Pa in sequence, the vacuum degree is monitored 1h in advance in each stage, and the vacuum degree is maintained by adjusting the rotating speed through a variable frequency motor or starting a standby pump for combined air exhaust; after distillation is finished, an inert gas circulating cooling system is adopted for cooling, and the cooling rate is smaller than or equal to 10 DEG C / min. According to the process, the vacuum degree and the temperature are precisely regulated and controlled in stages, impurities in the sponge titanium can be effectively removed, the product purity is improved, meanwhile, it is guaranteed that the production process is stable and controllable, and the production efficiency and the product quality consistency are improved.

The invention relates to the technical field of image processing, in particular to an image enhancement method and system for titanium metal surface detection. The method comprises the following steps: converting a to-be-processed titanium metal surface image from an RGB space to an HSI space, obtaining a brightness component of the to-be-processed titanium metal surface image, decomposing an initial reflection component into a plurality of high-frequency sub-band coefficients and a low-frequency sub-band coefficient, determining the anisotropy degree of each pixel point, and generating an anisotropy saliency map; and enhancing the high-frequency sub-band coefficient corresponding to the pixel of which the anisotropy degree is higher than a preset threshold value, otherwise, suppressing the high-frequency sub-band coefficient, reconstructing an enhanced reflection component and an enhanced brightness component by utilizing the adjusted high-frequency sub-band coefficient and the unprocessed low-frequency sub-band coefficient, converting the enhanced reflection component and the enhanced brightness component back to an RGB space, and outputting a final enhanced image. According to the scheme of the invention, the enhanced image with clear defect contour, few artifacts and reserved original color information can be obtained, and the accuracy and reliability of subsequent automatic defect identification are greatly improved.

The invention provides an oblique coil electromagnetic classificator for separating weak magnetic impurities from strong magnetic concentrate, which comprises a separation cylinder, an ore feeding device and a flushing device, an ore feeding pipe of the ore feeding device extends into the separation cylinder from the top end of the separation cylinder, the flushing device is arranged below the ore feeding pipe, and an oblique coil is arranged on the outer side of the separation cylinder, so that the weak magnetic impurities can be separated from the strong magnetic concentrate. Magnetic lines of force are obliquely distributed, magnetic linkages formed by magnetic particles are oblique, the whole magnetic linkages can be efficiently impacted in cooperation with vertical component force Fz of water flow of the flushing device, and scattering of magnetic aggregates is facilitated; the tail control flat coil and the concentrate gathering flat coil at the upper end and the lower end effectively control tailings and concentrates respectively, so that the separation efficiency of strong magnetic concentrates and weak magnetic impurities is improved, for example, in the iron-titanium separation operation of vanadium titano-magnetite ore dressing, ilmenite mixed into iron ore concentrates can be reduced, the grade of the iron ore concentrates can be improved, and titanium metal resources can be fully recycled.

The invention relates to a preparation method of trimethoxy pentamethyl cyclopentadienyl titanium, which comprises the following steps: (1) vacuumizing a reactor for replacement, detecting the content of moisture and oxygen in gas in a reaction kettle by an instrument, and stopping vacuum replacement when the content is lower than 50ppm; (2) pentamethyl cyclopentadienyl titanium trichloride, ammonia and a solvent are added into a reactor, methanol is dropwise added into the reactor, a crude product trimethoxy pentamethyl cyclopentadienyl titanium is obtained through a reaction, the reaction temperature ranges from-30 DEG C to 50 DEG C, and the pressure ranges from-0.05 MPa to 0.05 MPa; (3) filtering and desalting the crude product trimethoxy pentamethyl cyclopentadienyl titanium obtained in the step (2) in an inert environment; and (4) the filtrate obtained in the step (3) is refined, pure trimethoxy pentamethyl cyclopentadienyl titanium is obtained, and the metal purity reaches 5N. Methanol is used as a raw material, the synthesis route can be shortened, the cost is reduced, and meanwhile, the material is relatively safe.

The embodiment of the invention provides a preparation method of a titanium foil strip with high elongation and good surface microcosmic quality. The preparation method comprises the steps that a sponge titanium raw material is smelted and machined through a primary electron beam cold hearth smelting furnace; the titanium metal plate blank is coated with an anti-oxidation coating to form an anti-oxidation coating; the titanium metal plate blank coated with the anti-oxidation coating is subjected to heating, heat preservation, hot rolling and continuous annealing shot blasting acid pickling treatment; the hot-rolled titanium coil is subjected to first-rolling-process cold rolling, and continuous annealing, shot blasting and acid pickling are conducted after cold rolling; carrying out multi-rolling-process cold rolling and semi-finished product annealing by adopting a cold rolling unit and an argon protection cover type furnace; carrying out finished product rolling on the annealed master tape by adopting a cold rolling unit; performing finished product heat treatment on the titanium strip by adopting an argon shield continuous annealing furnace; and straightening the annealed titanium strip by adopting a tension straightening machine. According to the embodiment of the invention, the titanium foil strip with high elongation and good surface microcosmic quality is obtained, and the prepared titanium foil strip is excellent in forming performance and surface microcosmic quality.

The application provides a steam heating cooking device with a titanium inner container and belongs to the technical field of daily necessities. The steam heating cooking device solves the technical problems of poor safety, complex structure and poor heat preservation effect in the prior art. The steam heating cooking device comprises a pot body, the pot body comprises an inner container made of titanium metal or titanium alloy, an outer shell one made of metal is arranged on the periphery of the inner container, and a vacuum cavity is arranged between the inner container and the outer shell one. The inner container made of titanium metal or titanium alloy can improve the cleanliness, avoid the penetration of harmful substances during cooking and improve the safety.

The present invention belongs to the technical field of titanium metal processing waste acid treatment, and specifically relates to a method for regenerating titanium metal pickling waste liquid. The regeneration method comprises the following steps: adding a fluorosilicic acid solution to the titanium metal pickling waste liquid and mixing uniformly, then adding a potassium salt solution, stirring the reaction at room temperature, and centrifuging or filtering after the reaction is complete to separate the solid portion as a potassium fluorotitanate / potassium fluorosilicate complex; and the liquid portion as a regenerated titanium metal pickling liquid. The method of the present invention can significantly improve the titanium ion recovery rate without destroying the pickling liquid components. The titanium metal pickling waste liquid can be regenerated and reused, and has the advantages of good treatment effect and simple treatment process.

A method for producing a metal-organic framework. The method includes: dissolving an acid compound having terephthalic acid as its main molecular structure, polyacrylic acid, and a silver-containing compound to produce an intermediate A; mixing a titanium-containing metal oxide cluster into the intermediate A to produce an intermediate B; heating the intermediate B to produce an intermediate C in a solid form; and repeatedly dissolving and centrifuging the intermediate C to produce a metal-organic framework.

The invention discloses a titanium metal workpiece stress detection device, and relates to the stress detection technology, the titanium metal workpiece stress detection device comprises a first circular plate, a plurality of limiting grooves are uniformly formed in the first circular plate along the circumferential direction, moving blocks are slidably mounted in the limiting grooves, two rotating shafts are rotatably mounted on the moving blocks, the upper ends of the rotating shafts penetrate through the limiting grooves, and the lower ends of the rotating shafts penetrate through the limiting grooves. The rotating shaft close to the middle of the first circular plate is sleeved with an inner expansion sleeve, and the rotating shaft far away from the middle of the first circular plate is sleeved with an outer shrinkage sleeve. According to the titanium metal workpiece stress detection device provided by the invention, after the workpiece is pressed by the inner expansion sleeve or the outer shrinkage sleeve, the workpiece is driven to rotate through the synchronous rotation of the inner expansion sleeve or the outer shrinkage sleeve, so that the side wall of the workpiece is uniformly pressed, and therefore, the workpiece can conveniently rotate to switch the stress detection position; and meanwhile, the structure for pressure detection is a clamping transposition structure, so that additional interference on stress detection is avoided.

The present invention belongs to the field of semiconductor power device technology and relates to a novel method for preparing metal contacts for silicon carbide power devices. Specifically, a method for preparing a silicon carbide field-effect power transistor with an integrated Schottky diode is provided, which simplifies the preparation process, reduces preparation costs, and shortens the manufacturing cycle, making it particularly suitable for large-scale industrial production. During the device electrode preparation process, the present invention uses a single mask to produce Schottky contact holes and gate contact holes through a single etching process. Ohmic contact is achieved above the source electrode using nickel metal through a photomask, and Schottky contact is formed above the Schottky region and gate using titanium metal through a photomask. This ensures that both ohmic and Schottky contacts achieve good performance, and not only saves manufacturing costs in large-scale production, but also reduces the device manufacturing cycle.

A device includes a gate structure, a source / drain structure, a source / drain conductor, a barrier layer, and a dielectric liner layer. The gate structure is over a semiconductor structure and includes a gate dielectric layer and at least one titanium-containing metal layer over the gate dielectric layer. The source / drain structure is adjacent the gate structure and a sidewall of the semiconductor structure. The source / drain conductor is over the source / drain structure. The barrier layer warps around the source / drain conductor. The dielectric liner layer is on a sidewall of the barrier layer. Both the dielectric liner layer and the barrier layer extend into the source / drain structure.

The hydrophilic and lipophilic oil-water separation metal mesh is woven by titanium wires, the mesh aperture is 80-300 meshes, the diameter of the titanium wire is 80-300 microns, the surface of the titanium wire has a porous nanometer film with a thickness of 10-30 microns, the porous nanometer film is a porous structure with a pore size of 5-25 microns constructed by titanium nanowires, and the diameter of the titanium nanowire is 40-80 nm. The mechanism of the metal mesh for oil-water separation is that the titanium wire mesh soaked in an alkaline solution at high temperature can quickly form a water film when encountering water, and the oil will float on the surface of the water film. The water film allows water to continue to pass through the mesh holes of the titanium metal mesh, but can block the passage of oil liquids, thereby realizing the rapid separation function of oil and water. The metal mesh can realize rapid and efficient separation of oil and water, is low-carbon and environmentally friendly, the preparation method is simple and easy to operate, the preparation cost is low, and the mass efficient construction and preparation of the oil-water separation metal mesh can be realized.

The invention provides a method for forming a titanium / titanium nitride film. The method comprises the following steps of: depositing a titanium metal layer on a semiconductor substrate; and performing thermal annealing treatment on the semiconductor substrate deposited with the titanium metal layer in a nitrogen-containing atmosphere, so that the titanium metal layer reacts with the semiconductor substrate to form a metal silicide, and meanwhile, the titanium metal layer reacts with the nitrogen-containing atmosphere to generate a titanium nitride layer. The silicide contact layer and the titanium nitride barrier layer are formed at the same time through the in-situ reaction, and the technological process is simplified. The titanium nitride layer formed by the method is thin, stress distribution of the wafer is effectively improved, the problem of wafer warping caused by the fact that the titanium nitride layer is too thick in a traditional process is solved, meanwhile, it is guaranteed that a silicon interface reacts sufficiently, contact resistance is reduced, and consistency of electrical parameters of a device is improved.

The invention discloses a p-channel gallium nitride transistor and a preparation method thereof, and relates to the technical field of semiconductor devices. The p-channel gallium nitride transistor comprises a substrate; the barrier layer and the p-type gallium nitride layer are located on one side of the substrate; the p-type gallium nitride layer and the barrier layer form a hole heterojunction structure; the p-type gallium nitride layer comprises a first groove, and a first bulge and a second bulge which are positioned on two opposite sides of the first groove; the ratio range of the thickness L1 of the groove bottom of the first groove to the thickness L2 of the p-type gallium nitride layer at the first bulge and / or the second bulge is 1 / 14 < = L1 / L2 < = 3 / 14; a depletion layer located in the first groove; the depletion layer comprises a titanium metal layer and a titanium nitride layer which are laminated, and the titanium nitride layer is located between the titanium metal layer and the p-type gallium nitride layer; the source electrode and the drain electrode are located on the sides, away from the substrate, of the first protrusion and the second protrusion respectively; the grid electrode is located in the first groove and located on the side, away from the p-type gallium nitride layer, of the depletion layer. The stability and the electrical performance of the transistor are improved.

The invention discloses a titanium metal dental implant and a processing method thereof, and belongs to the technical field of medical instruments, the surface of an implant part of the implant is provided with a composite bioactive layer, and the composite bioactive layer is formed by compounding a first-stage micron hole layer formed by selective laser micro-melting and a second-stage submicron-nano mesh hole layer formed by micro-arc oxidation, and the secondary pore layer has gradient distribution of bioactive elements such as calcium and phosphorus. The processing method comprises the steps of matrix pretreatment, construction of a micron structure through selective laser micro-melting, synchronous construction of a nano structure through micro-arc oxidation, element gradient doping and post-treatment. The surface of the prepared implant has a unique micron-nano graded composite pore structure and gradient distribution of bioactive elements, the mechanical stability and the biological activity of the implant can be synergistically promoted, rapid and stable osseointegration is realized, the processing method is green and controllable, and the implant has a good application prospect.

The invention relates to the field of magnesium / titanium bimetallic materials, in particular to a copper transition magnesium / titanium bimetallic material and a preparation method thereof, and the preparation method comprises the following steps: (1) modeling a target structural member; (2) pretreating the titanium alloy substrate; (3) printing a lower titanium alloy layer; (4) printing intermediate copper; (5) printing an upper magnesium alloy layer; and (6) the electric arc additive manufacturing process is adjusted, and the process is repeated. The electric arc additive technology is generally adopted, the electric arc serves as a heat source, the magnesium / titanium metal wires serve as raw materials, instant manufacturing of parts is achieved, and the method is suitable for preparing large magnesium-titanium alloy structural parts. In the material adding process, the metal wires are rapidly solidified and deposited layer by layer, and a more uniform and tighter metallurgical bonding interface is formed. In addition, copper (Cu) is adopted as transition metal, the interface reaction can be improved, the bonding strength of the magnesium / titanium alloy can be improved, and therefore the magnesium / titanium bimetallic material good in mechanical property is obtained. According to the process, the preparation cost is saved, and the manufacturing efficiency is improved.

The utility model discloses a middle frame assembly and electronic equipment, and relates to the technical field of electronic equipment. The middle frame assembly comprises a plurality of borders and a middle plate, the borders are titanium borders or titanium alloy borders, and the borders are opposite in an end-to-end mode to form an annular structure. The material of the middle plate is different from that of the plurality of frames, and the middle plate is located in the annular structure and is connected with the plurality of frames through plastic cement. The frame plays a main role in supporting the internal space of the whole electronic equipment, the frame is a titanium metal frame or a titanium alloy frame, certain structural strength is guaranteed while the weight is reduced, and the middle plate plays an auxiliary role in supporting the internal space of the whole electronic equipment. Compared with the frame, the electronic equipment can adopt the middle plate which is lighter in weight and weaker in structural strength and is made of other materials, so that the middle frame assembly is lighter in overall weight and higher in structural strength, and two parameters of strength and weight are considered.

The invention provides a brazing method suitable for a medical implantable ceramic tube shell. The brazing method comprises the steps that a zirconia ceramic workpiece is cleaned; performing vacuum magnetron sputtering on the surface of the cleaned zirconia ceramic workpiece, and sequentially depositing a bottom metal layer and a surface metal layer to form a metalized layer; performing vacuum heat treatment on the zirconia ceramic workpiece with the metalized layer so as to eliminate the internal stress of the metalized layer; acid pickling is conducted on the surface of the pure titanium metal piece to remove an oxidation film, and drying treatment is conducted; placing a gold solder between the metallization layer and the pure titanium metal piece, and assembling an assembly to be welded; according to the method, a to-be-welded assembly is placed in a vacuum brazing furnace to be brazed, preset heating, heat preservation and cooling procedures are executed, and high-strength, high-airtightness and excellent-biocompatibility connection between zirconia ceramic and pure titanium is achieved through an optimized surface metallization process, stress relief treatment and a strictly-controlled full-process vacuum brazing process.

The application discloses a kind of processing methods for improving the sterilization performance and anti-adhesion performance of medical titanium metal surface, and the specific steps are as follows: 1) pretreatment is carried out on titanium metal sample and cleaned and dried for standby;2) nanosecond laser is used to process the titanium metal sample after pretreatment, to form micron grid structure on its surface;3) configure zinc oxide seed solution, and spin coating solution on the titanium metal sample after laser processing, so that micron grid structure surface is evenly fixed on zinc oxide seed layer;4) using hydrothermal synthesis method, prepare rod-shaped zinc oxide nanostructure on the titanium metal surface with zinc oxide seed layer spin coated;5) configure ethanol solution containing fluorosilane, modify the surface of micro-nano composite structure, and after standing, dry.The titanium metal surface constructed by the application has the dual functions of sterilization and inhibition of bacterial adhesion, the preparation method is simple, and bacterial resistance is not easy to produce, and has potential application prospect.

The utility model belongs to the technical field of fireproof monitoring devices, and particularly relates to a titanium metal fireproof monitoring device based on a wireless network, which comprises an explosion-proof shell seat, an explosion-proof shell is in threaded connection with the explosion-proof shell seat, a double-layer mounting plate is arranged in the middle of the explosion-proof shell seat, and a circuit assembly is mounted on the upper layer of the double-layer mounting plate. A temperature sensor probe and a smoke sensor probe are mounted on the lower layer of the double-layer mounting plate, the circuit assembly comprises a circuit board and a storage battery which are mounted on the upper layer of the double-layer mounting plate, and a control chip and a battery charging adapter are arranged on the circuit board; four circular through holes are formed in the middle of the explosion-proof shell seat and are respectively positioned in the side parts of the double-layer mounting plate; a first voltage sensor and a second voltage sensor are arranged on the circuit board, the first voltage sensor is used for measuring the voltage of the total power line, and the second voltage sensor is used for measuring the voltage of the storage battery. According to the utility model, automatic charging can be carried out when the storage battery built in the fireproof monitoring device is under-voltage.

The utility model discloses a titanium alloy composite board processing is with pretreatment device relates to the field of composite metal material manufacturing, including base, the upper surface mounting of base has dust removal polishing chamber, the inner wall rotation of dust removal polishing chamber is connected with first polishing roller, second polishing roller and third polishing roller. The utility model drives first L shape pole and hollow cylinder whole in a pair of first arc plate to move back and forth under the action of concave-convex annular groove, drives hot drying pipe and second L shape pole whole in a pair of second arc plate to move back and forth, and multiple water outlets flow out to the surface of first sponge cover and immerse, and first sponge cover rubs the opposite surface of titanium metal plate and steel metal plate, removes dust, and the electric heating tube heating hot drying pipe is installed in hot drying pipe, and second sponge cover rubs the opposite surface of titanium metal plate and steel metal plate, removes the moisture of first sponge cover adhesion, and carries out the pretreatment operation to the pre-composite rolling operation.

This invention discloses a thermal shock-induced catalytic electrode, its preparation method, and its application in wastewater treatment, belonging to the field of wastewater treatment technology. The catalytic electrode comprises a titanium metal substrate and a mixed metal oxide catalytic layer formed on the surface of the titanium metal substrate. The mixed metal oxide catalytic layer has a hydroxylation-rich surface, high specific surface area, and large pore volume, and its microstructure is a uniform mud-crack-like porous structure containing nanoscale grains. The preparation method includes first laser shock strengthening of the titanium metal substrate to form a mesoscale array structure; then loading the mixed metal oxide precursor using an immersion-pulling-space flow method; subsequently performing annealing; rapidly immersing the annealed electrode in a hydrogen peroxide solution for thermal shock quenching; and finally performing low-temperature tempering to eliminate internal stress and reduce resistance. The catalytic electrode of this invention achieves a balance between catalytic activity, conductivity, and stability, and its preparation process is simple and easy for large-scale industrial production.

The present invention relates to a chitosan-titanium composite, a preparation method and use thereof, and more particularly, a chitosan-titanium composite capable of effectively adsorbing and desorbing 68Ge / 68Ga by combining small molecular chitosan with titanium metal oxide to increase adsorption reactivity to 68Ge and 68Ga desorption reactivity, and a preparation method and use thereof.

The application belongs to the field of aluminum-based composite materials, and particularly relates to a kind of additive manufacturing high-performance aluminum-titanium metal composite material and a preparation method thereof. Micron-sized aluminum alloy powder and micron-sized titanium alloy powder are mixed uniformly by ultrasonic-assisted water bath stirring method for laser powder bed melting, wherein the mass fraction of the aluminum alloy powder and the titanium alloy powder is 85-98 wt.% and 2-15 wt.% respectively. The micron-sized titanium alloy powder is used to promote the formation of multi-scale layered structure of equiaxed crystal, core-shell structure, cellular substructure and nano precipitate phase, so as to simultaneously improve the strength and plasticity of the material and realize isotropic mechanical properties. The aluminum alloy-titanium metal composite material for additive manufacturing disclosed by the application has simple and easy-to-control process and low cost, and can be suitable for large-scale production.

The invention provides a mono-titanocene metal complex, a catalyst composition, a propylene and 5-vinyl-2-norbornene copolymer and a preparation method, and the mono-titanocene metal complex has a structure as shown in a formula (I). The mono-titanocene metal catalytic system provided by the invention has the characteristic of high catalytic activity; and the propylene and 5-vinyl-2-norbornene copolymer with high molecular weight, narrow molecular weight distribution and high glass transition temperature can be prepared.

The utility model discloses a bone conduction earphone loudspeaker structure, which comprises a conduction surface cover, a support, a vibrating reed, a voice coil, a PCB (printed circuit board), U iron, a washer and a magnet, the support is arranged at one end of the conduction surface cover, the support is provided with a cavity, the PCB, the voice coil, the washer, the magnet and the U iron are sequentially arranged on the cavity, the vibrating reed is a titanium vibrating reed, the vibrating reed is arranged between the conduction surface cover and the support, and the vibrating reed and the U iron are in contact positioning; thus, through the design that the vibrating reed is made of a metal material, and the vibrating reed is arranged between the bracket and the conduction surface cover, the structural firmness and the anti-falling effect of the bone conduction loudspeaker on the earphone are improved, and the stability when the bone conduction loudspeaker drives the earphone shell to vibrate so as to conduct sound waves to the inner ear is ensured; the sound conduction of the bone conduction earphone is clearer, so that the use experience of a user is improved, the usability is good, and the application range is wide.