113 results about "Porous titanium" patented technology

The invention discloses a photo-thermal-electric coupling titanium-based implant as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The photo-thermal-electric coupling titanium-based implant provided by the invention comprises a porous titanium substrate and a hydrogel layer, the surface of the porous titanium substrate is of a TiO2 nanotube array structure; up-conversion nanoparticles and g-C3N4 nanoparticles are arranged between the porous titanium substrate and the hydrogel layer, and the up-conversion nanoparticles are NaYF4 up-conversion nanoparticles co-doped with Yb < 3 + > and Er < 3 + >; carbon nanotubes and medicinal active ingredients are loaded in the hydrogel layer. According to the titanium-based implant, collaborative coupling in light-heat-electricity multi-energy forms is achieved, the titanium-based implant is endowed with the integrated function of light response, heat conversion, electric signal conduction and local treatment, and an integrated solution with structural supporting, biological activity regulation and treatment effects is provided for bone tissue defect repair.

The invention relates to the technical field of automobile essence preparation, and particularly discloses automobile essence capable of removing formaldehyde and releasing anions and a preparation method of the automobile essence. Comprising the following raw materials in parts by weight: 500-600 parts of deionized water, 18-24 parts of a negative ion release enhancing component, 12-20 parts of an aldehyde removing component, 30-40 parts of absolute ethyl alcohol, 8-14 parts of a dispersing agent, 14-18 parts of phenoxyethanol, 22-26 parts of an initiator solution and 6-10 parts of citral. A negative ion release enhancing component and a formaldehyde removal component are added, the negative ion release enhancing component is prepared by modifying core-shell particles with a silane coupling agent, the outer layer of each core-shell particle is of a porous titanium dioxide structure, the inner core of each core-shell particle is modified electrical powder, and the formaldehyde removal component is prepared by carrying out a ring-opening esterification reaction on sodium alginate and allyl glycidyl ether, so that the formaldehyde removal effect is improved. And then carrying out chemical cross-linking with hydroxypropyl acrylate and methacrylic acid, thereby coordinating and enhancing the formaldehyde removal capability, the anion release capability and the antibacterial effect.

The application provides a preparation method of a high-performance porous titanium-based intermetallic compound filter and relates to the technical field of filter preparation.The method comprises sequentially performing titanium raw material hydrogenation, micron-sized titanium hydride powder preparation, mixed powder preparation, mixed powder dehydrogenation alloying, micron-sized alloy powder preparation, cold isostatic forming mold preparation of the porous titanium-based intermetallic compound filter, titanium-based filter compact preparation and porous titanium-based intermetallic compound filter preparation.The application uses off-grade titanium as a matrix raw material, adds alloying elements such as aluminum and iron, combines the hydrogenation-dehydrogenation process with high-energy ball milling, and then realizes near forming of the porous titanium-based intermetallic compound filter through cold isostatic pressing and vacuum sintering.The prepared filter has high porosity, uniform pore size distribution and excellent corrosion resistance, can be used stably for a long time in a high-temperature and strong-corrosion environment, can realize efficient and high-precision purification of titanium tetrachloride, and is beneficial to industrial large-scale production and popularization.

To provide an electrolysis method for water, a manufacturing method for hydrogen, and a manufacturing method for a cell of a PEM type water electrolysis apparatus, in which a titanium porous body within the cell has a relatively smooth surface on an electrolyte membrane side, has air permeability or liquid permeability, and can exhibit relatively high electrical conductivity.SOLUTION: An electrolysis method for water according to the present invention is a method for water electrolysis using a PEM type water electrolysis apparatus comprising a cell including a stack comprising a cathode, an electrolyte membrane, a porous transport layer, and an anode, where the porous transport layer has a titanium porous body, where, at a surface of the titanium porous body facing the electrolyte membrane, an average area of pores opening into the surface is 5 μm2 or more and 45 μm2 or less, where a standard deviation of the area of the pores is 90 μm2 or less, where a number of the pores existing within a rectangular region having an area of 22,000 μm2 and an aspect ratio of 4:3 is 120 or more, and where the PEM type water electrolysis apparatus is used with a pressure acting in a stacking direction of the cathode, the electrolyte membrane, the porous transport layer, and the anode being 6 MPa or more at a time of assembling the cell.SELECTED DRAWING: None

The application provides a TPMS porous titanium-based composite structure based on selective laser melting and a preparation method thereof, relates to the technical field of titanium-based composite materials, and the method takes TC4 titanium alloy powder as a matrix, introduces TiB2 ceramic particles as a reaction precursor, uses high-energy laser action to induce in-situ reaction of TiB2 and the titanium matrix in the selective laser melting process, and generates TiB reinforcing phases; on the basis, a porous structure with periodic continuous curved surface characteristics is constructed by combining a three-period minimal surface structure design method, and the synergistic regulation of material performance and structural performance is realized; it is verified that by regulating process parameters such as laser power, scanning speed and scanning interval, the stable forming of the TPMS porous structure can be realized, and the TiB reinforcing phases are uniformly distributed in the structural matrix; the prepared structure has good mechanical response characteristics while keeping high forming precision, and presents stable deformation behavior and continuous energy absorption process under the action of compression load.

The invention relates to the technical field of polymer coatings, in particular to a solvent-free permeation-resistant anti-corrosion polymer coating and a preparation method thereof. The invention relates to a preparation method of a solvent-free permeation-resistant anti-corrosion polymer coating. The preparation method comprises the following steps: preparation of an MXene nanosheet, preparation of a modified MXene filler, preparation of a slow-release corrosion inhibitor and preparation of a polymer coating. The double modified MXene and the slow-release corrosion inhibitor are adopted to synergistically improve the corrosion resistance of the coating. Modified MXene is subjected to intercalation modification by tannic acid and phytic acid, so that the modified MXene has physical barrier and chemical corrosion inhibition characteristics, the compatibility with a resin interface is enhanced, and the permeation resistance of a solvent-free coating is improved; according to the slow-release corrosion inhibitor, porous titanium-based oxide is used for loading MBT, slow release is triggered when the coating is damaged, active repairing is achieved, the pain point that a traditional coating is damaged and fails is solved, and the corrosion resistance in the severe environment is greatly improved.

The invention belongs to the technical field of implant materials, and discloses a porous titanium-based implant material surface calcium-phosphorus coating and a preparation method thereof. According to the method, a porous titanium-based implant material is used as a cathode, an annular platinum electrode is used as an anode, the cathode is located in the center of the annular electrode, a solution containing calcium and phosphorus is used as an electrolyte, biomimetic mineralization is carried out under the condition of pulse micro-potential, and the calcium-phosphorus coating is formed on the surface of the porous titanium-based implant material. According to the method, the biomimetic mineralization process of the surface of the beam structure in the porous titanium-based material is regulated and controlled by adopting the annular electrode and the weak electric field, migration of ions and ion groups in the porous scaffold is improved by adjusting the current of the annular electrode and combining the biomimetic mineralization process, and the porous titanium-based implant material uniformly covered with the calcium-phosphorus coating is obtained. The method is simple, and uniform covering of the calcium-phosphorus coating of the porous titanium-based implant material is achieved.

The invention discloses a titanium-magnesium nail plate system capable of promoting fracture healing and a manufacturing and forming method. The manufacturing and forming method comprises the steps that a bone fracture plate digital model containing a bone trabecula simulation porous area and a partition filling cavity is established according to a bone anatomical structure, and a titanium-based workpiece of a porous structure is manufactured through selective laser melting forming; a titanium-zinc-calcium component gradient transition layer is constructed layer by layer on the surface of the porous inner wall of the titanium-based workpiece through a directional deposition process, interface bonding is strengthened through low-temperature heat treatment, and the titanium-based workpiece with a gradient interface is obtained; the titanium-based workpiece with the gradient interface is placed in an inert atmosphere, after heating is conducted, molten magnesium or magnesium alloy is injected into all the cavities through a partitioned vacuum pressure injection technology, and after cooling is conducted, a titanium-magnesium composite workpiece is formed; through a customized and interface-controllable manufacturing method, a high-strength titanium skeleton and a degradable healing-promoting magnesium material are firmly combined, and integrated design and manufacturing of mechanical support and biological activity of the internal fixation device are achieved.

The invention discloses a method for preparing a porous titanium-based material with low mass transfer resistance by using magnetic field induction, and relates to the technical field of electrode manufacturing, and the method comprises the following steps: preparing titanium powder slurry containing magnetic components and titanium powder slurry without magnetic components, and preparing a double-layer or multi-layer composite structure from different slurries; directionally arranging the magnetic components by using a magnetic field; the sintering treatment enables the magnetic components to be decomposed or sintered to generate a directionally-arranged supporting structure, and the directionally-arranged supporting structure is obtained; and continuously sintering at the temperature higher than the first temperature interval, and pickling to remove the directionally arranged support structure to obtain the porous titanium-based material with the dual-scale pore structure, the problems that in the prior art, mass transfer efficiency is low, mass transfer resistance is large, a directional through pore structure is difficult to achieve, cooperative construction of pores with different pore diameters is difficult, the functionality of the pores is single, and the pores are prone to being polluted are solved.

The invention discloses a preparation method of a carbon-coated lithium titanate composite silicon negative electrode material, which comprises the following steps: mixing raw materials, carrying out two-stage high-temperature calcination, converting a lithium source and a titanium source into lithium titanate, carrying out disproportionation reaction to convert silicon monoxide into silicon simple substance silicon dioxide, removing silicon dioxide by acid etching, and carrying out carbon coating by chemical vapor deposition to obtain the carbon-coated lithium titanate composite silicon negative electrode material. A final product is obtained. The porous lithium titanate has the characteristics of zero volume expansion, high safety, long service life and low energy density, and the nano silicon has the characteristics of high specific capacity, large volume expansion and poor cycle performance, so that the comprehensive performance of high capacity, long cycle and high safety is finally realized by utilizing the synergistic effect of the porous lithium titanate and the nano silicon; compared with a silane chemical vapor deposition silicon process, the process is safe and low in cost; compared with a process of respectively preparing porous lithium titanate and nano silicon and then mixing, the preparation method disclosed by the invention has the advantages that the problem that nano silicon is easy to agglomerate is avoided, and the electrochemical performance of a finished product is effectively improved.

The invention discloses a method for enhancing fatigue performance of a Ti175 porous titanium alloy, which comprises the following steps of: under the protection of inert atmosphere, quickly putting a sample into a central isothermal area of a tubular furnace preheated to a first target temperature, continuously heating to a second target temperature, preserving heat, converting an original structure into a double-state structure, and cooling to room temperature at a controlled cooling rate; under inert atmosphere protection, the sample is heated to a third target temperature and subjected to heat preservation, then cyclic loads within the elastic range are applied in a stress control mode, and after loading is finished, the sample is cooled to the room temperature at the controlled cooling rate; under the air or inert atmosphere, the sample is rapidly placed into a box-type furnace preheated to a fourth target temperature, the temperature continues to rise to a fifth target temperature, heat preservation is conducted for a short time, residual stress is released, a surface oxygen solid solution strengthening layer is formed, and then the sample is cooled to the room temperature at the controlled cooling rate.

The application discloses a method for preparing an oxide composite insulating layer on a titanium alloy surface and relates to the technical field of insulating material preparation. The titanium alloy is subjected to high-temperature oxidation to obtain a porous titanium oxygen layer, then the porous titanium oxygen layer is subjected to ultrasonic-assisted sealing treatment by using an organic sealing agent, and after solidification, the oxide composite insulating layer is obtained on the titanium alloy surface. The oxide composite insulating layer prepared on the titanium alloy surface has good insulating capacity in a solution environment and is resistant to hydrochloric acid and nitric acid corrosion, and has good application on a gold plating and nickel plating hanger in the watch industry.

The invention relates to the technical field of biomedical material manufacturing, in particular to spraying equipment for a sustained-release coating of a drug-loaded porous titanium fusion cage. The spraying device comprises a spraying gun, the spraying gun comprises a coating flow channel and a spraying head, and a sudden pressure buffering mechanism is arranged between the coating flow channel and the spraying head. According to the device, the flow area of the connecting pipe is increased in real time through movement of the conical flow guide body, magnetorheological fluid is arranged in the storage cavity of the conical column body, and when the conical flow guide body is influenced by coating impact force to move into the storage cavity, a contact, a controller and a fixed coil are triggered to be matched; the magnetic field intensity formed by the fixed coil is changed to quickly adjust the viscosity of the magnetorheological fluid, the moving resistance of the conical flow guide body is controlled in real time when the paint pressure is suddenly increased, the situation that the flow area of the connecting pipe is suddenly changed due to the fact that the conical flow guide body moves too quickly due to the paint pressure is suddenly increased is avoided, and the paint flowing stability is maintained; and the problem that a traditional filtering structure is insufficient in adaptability when the pressure is suddenly increased is effectively solved.

The application relates to the technical field of titanium disc piece machining equipment, and discloses a forming device and method for pressing and forming porous titanium dioxide disc pieces, which comprises a machine body, the surface of the machine body is provided with a pressing device, the pressing device comprises a lower mold, the lower mold is fixedly connected with the upper surface of the machine body, the upper surface of the lower mold is fixedly connected with a guide column, the upper side of the guide column is fixedly connected with a mounting frame, the upper surface of the mounting frame is fixedly connected with a hydraulic cylinder one, the piston rod of the hydraulic cylinder one is fixedly connected with an upper mold, the lower surface of the upper mold is provided with a forming groove, and the inner wall of the machine body is fixedly connected with a horizontal plate. In the application, the pressing device is arranged, so that the cutting and shaping can be combined during the machining of the forming device, the single workpiece machining time is shortened from 25 seconds to 12 seconds, the material transfer process is reduced, and the production efficiency of the forming device and the workpiece yield are improved.

The invention provides spatial layered porous titanium dioxide as well as a preparation method and application thereof. The preparation method of the spatial layered porous titanium dioxide comprises the following steps: S1, mixing a carbohydrate carbon source, an organic solvent and water, carrying out hydrothermal reaction, centrifuging, washing and drying to obtain carbon spheres; s2, styrene, water, polyvinylpyrrolidone and potassium persulfate are mixed, heated and stirred, and polystyrene microsphere emulsion is prepared; s3, dispersing carbon spheres in a solvent to prepare a carbon sphere dispersion liquid; s4, under the vacuum filtration condition, dispensing and assembling the carbon sphere dispersion liquid and / or the polystyrene microsphere emulsion to form a hard template with a spatial sequence structure; and S5, completely infiltrating the hard template with TiCl4, and sequentially drying and calcining to obtain the spatial layered porous titanium dioxide. The spatial layered porous titanium dioxide disclosed by the invention shows excellent photocatalytic reaction performance, and has relatively high CO selectivity during photocatalytic reduction of carbon dioxide.

The present application belongs to the field of foot and ankle surgical implant devices and biomedical material surface engineering technology, and discloses a tibial component of ankle prosthesis with a composite coating, which comprises: a metal substrate which is a bionic trabecular three-dimensional interconnected porous titanium alloy structure, the porosity is 50-80%, the average pore size is 400-900 mu m, and the connected porosity is greater than or equal to 85%, so that the elastic modulus is controlled in the range of 5-20 GPa, and is matched with the cancellous bone of the tibia; a composite functional coating is in situ grown on the surface of the metal substrate, and the composite functional coating comprises a bioactive layer and a functional ion doped layer. The tibial component of the present application comprises a porous titanium alloy metal substrate and a composite functional coating constructed in situ on the surface thereof, the porous titanium alloy substrate is designed in a bionic trabecular structure to form a three-dimensional interconnected porous structure, so as to provide an elastic modulus matched with the cancellous bone of the tibia and promote the growth of bone tissue.

This invention discloses a self-lubricating hydrogel titanium alloy biomimetic joint bearing interface and its preparation method. The self-lubricating hydrogel titanium alloy biomimetic joint bearing interface is composed of a porous titanium alloy substrate, a functionalized interface layer, a negatively charged hydrogel layer, and a self-lubricating adsorption layer. A laser drilling method is used to create a porous structure on the surface of a Ti6Al4V substrate. A hydrogel precursor solution is coated onto the surface of the Ti6Al4V sample and cured by ultraviolet irradiation to obtain a negatively charged hydrogel titanium alloy composite sample. The negatively charged hydrogel titanium alloy composite sample is subjected to freeze-thaw cycles and then immersed in zwitterionic or cationic solutions for adsorption, resulting in a hydrogel titanium alloy biomimetic joint bearing interface with self-lubricating properties. The hydrogel titanium alloy biomimetic joint bearing interface of this invention significantly improves the lubrication performance of titanium alloy materials used in artificial joints, achieving biomimetic design of natural joints in terms of tissue structure and lubrication function, and is suitable for the repair and replacement of damaged articular cartilage.

The disclosure pertains to implantable medical devices for controlled delivery of therapeutic agents. Some devices according to the disclosure have a titanium reservoir, and a porous titanium oxide based membrane to control the rate of release of the therapeutic agent. The reservoir contains a formulation of the active agent, including a stabilizer for the active agent, wherein the stabilizer is provided in an extended-release configuration or a sustained release carrier.

The invention discloses a bionic porous titanium-silicon material based on topological connectivity optimization and a preparation method thereof, and belongs to the technical field of new materials. The material is inspired by the Poincare conjecture topology principle, a three-dimensional bicontinuous porous network structure with the global single-connection and local bicontinuous characteristics is designed and constructed, and titanium-silicon intermetallic compounds (such as Ti5Si3 and TiSi2) are used as a framework. The preparation method combines an additive manufacturing template technology and a reaction synthesis technology, and is realized through the steps of three-dimensional template design, precursor slurry impregnation, programmed heat treatment and the like. The material disclosed by the invention has excellent connectivity, high specific surface area and good mechanical strength while keeping high porosity (50-98%), and has important application value in the fields of catalysis, energy storage, light structures and biomedicine.

The present application relates to the field of medical materials, in particular to a preparation method of high-performance medical tantalum coating. A thin-size-low-diffusion tantalum coating is prepared on the surface of a porous titanium alloy substrate by a chemical vapor deposition method through a halide reaction of hydrogen reduction of metallic tantalum; there is an alloy element interdiffusion zone between the tantalum coating and the porous titanium alloy substrate, and the thickness of the interdiffusion zone is less than the thickness of the tantalum coating. The present application obtains a high-performance thin-size tantalum coating with high purity, small grain size and controllable transition layer suitable for the porous titanium alloy substrate, has higher preparation efficiency and lower cost, realizes high bonding strength of the coating and simultaneous improvement of the strength and plasticity of the porous titanium alloy, avoids dissolution of toxic metal ions such as Al and V, and improves biocompatibility and osteogenic performance. The new tantalum coating porous titanium alloy implant device has obvious advantages of higher mechanical, chemical and biological safety and lower cost, and is suitable for the fields of orthopedics, dental implants and tissue defect fillers.

The application discloses a kind of porous titanium doped biochar materials and its preparation process, belong to environmental functional adsorption material technical field.The forestry waste pine cone is used as raw material, and the base biochar is obtained by inert atmosphere carbonization, then the titanium source is uniformly loaded on the biochar skeleton, and the titanium modified biochar with stable structure and abundant active sites is prepared by subsection temperature control pyrolysis activation.The characterization results show that the obtained material has anatase titanium dioxide as active crystal phase, with developed microporous structure, high specific surface area and abundant Ti-O active sites, and strong negative surface charge.The preparation process has mild conditions and controllable process, the raw material source is wide, the cost is low, and the modification effect is stable, which provides technical support for the structure regulation and heavy metal pollution repair application of biomass-based functional carbon materials.

The application provides a single-atom ruthenium modified blue-black titanium dioxide film electrode and a preparation method and application thereof, the single-atom ruthenium modified blue-black titanium dioxide film electrode has a pore size of 200-500 mu m, a porosity of 75%-90%, and a ruthenium loading of 0.2-1.0 wt%. The preparation method comprises the following steps: step S1, 3D printing a three-dimensional ordered porous titanium dioxide film electrode; step S2, performing electrochemical reduction treatment on the three-dimensional ordered porous titanium dioxide film electrode to obtain a blue-black titanium dioxide film electrode; and step S3, placing the blue-black titanium dioxide film electrode in a ruthenium precursor dispersion liquid and performing ultraviolet light treatment to obtain the single-atom ruthenium modified blue-black titanium dioxide film electrode. The single-atom ruthenium modified blue-black titanium dioxide film electrode according to the embodiment of the application has excellent chlorine evolution, · OH excitation activity and stability, and can significantly strengthen electrode mass transfer and electron transfer, thereby more efficiently and greenly oxidizing and removing refractory organic pollutants in a salt-containing waste liquid.

The application relates to the field of horseshoes, and particularly discloses a 3D-printed porous titanium alloy horseshoe, which comprises a U-shaped horseshoe body with elasticity, a fitting sheet fixedly connected to the U-shaped horseshoe body, the inner side of the fitting sheet being attached to the outer circumferential side of a horseshoe, a circular ring fixedly connected to the U-shaped horseshoe body and located on the outer side of the fitting sheet, a metal rope arranged through the circular ring, and a tensioning mechanism used for tightening the metal rope, so that the horseshoe body is deformed, and the fitting sheet tightly wraps the horseshoe. The application guarantees the wear resistance of the horseshoe, and the horseshoe is more portable, easy to put on and take off and replace. The porous titanium alloy can be adjusted in density, size, shape and distribution of the holes, and different filling materials can be added in the hole gaps, so that the overall properties can be changed to adapt to different application scenarios.

The application relates to the technical field of titanium dioxide, and discloses a preparation process of surface-modified porous titanium dioxide and application thereof. The porous titanium dioxide has a large number of pore structures, a large specific surface area, and many adsorption sites, and is grafted with a hydroxyl-containing histidine-based polyamide containing a salicylaldehyde Schiff base structure, an imidazole structure and a polyamide structure, can have a strong coordination with Pb 2+ , Hg 2+ , and thus has excellent adsorption performance. 3,3'-diamino-benzidine is used as a polymerization monomer, the benzidine structure has heat resistance, the benzidine structure is introduced into the main chain of the polyamide after polymerization, the polyamide has excellent high-temperature resistance, the polyamide molecular chain does not pyrolyze at high temperature, the surface-modified porous titanium dioxide adsorbent still has high adsorption efficiency, and the surface-modified porous titanium dioxide adsorbent can meet the actual application of the adsorbent in the treatment of wastewater in a complex system such as high temperature.

This invention discloses a preparation process for titanium anodes used in electrolytic copper foil, relating to the field of anode plate manufacturing technology. In preparing the titanium anode for electrolytic copper foil, porous titanium is pretreated and then reacted sequentially with sodium hydroxide and chloroacetic acid to obtain nanowire titanium dioxide coated porous titanium; an iridium-tantalum pentoxide / titanium anode is prepared by mixing chloroiridium hexahydrate and tantalum ethoxide to form an iridium-tantalum pentoxide coating solution; polypyrrole is polymerized and coated onto graphene oxide to obtain polypyrrole-coated graphene oxide; a composite coating solution is prepared by reacting polypyrrole-coated graphene oxide, nickel chloride hexahydrate, and ferric chloride hexahydrate, followed by reduction with hydrazine hydrate; this composite coating solution is then coated onto the iridium-tantalum pentoxide / titanium anode to obtain the titanium anode for electrolytic copper foil. The titanium anode for electrolytic copper foil prepared by this invention exhibits excellent electrocatalytic performance and service life.

The application discloses a mold for preparing high-porosity spherical porous titanium alloy, which comprises an upper mold punch and a lower mold punch provided with upper half-sphere grooves and lower half-sphere grooves; the upper half-sphere grooves are communicated with each other through upper mold flow channels; and the upper mold punch is further provided with a feeding flow channel. In addition, the application further discloses a preparation method of the high-porosity spherical porous titanium alloy. After titanium powder and other metal element powders are mixed and annealed, the titanium powder is mixed with a binder, and then a spherical blank is prepared by using injection molding equipment and the mold; the spherical blank is subjected to degreasing, sintering and gas suspension smelting in sequence to obtain the high-porosity spherical porous titanium alloy. The porous titanium alloy prepared by the application has high sphericity, smooth surface and relatively dense spherical wall, and the porosity can be controlled according to application conditions, so that the application demands in different fields are met. In addition, the application uses element powder in-situ alloying to prepare the spherical porous titanium alloy, the alloy composition can be freely designed, and batch production can be easily realized.

The application discloses a titanium / tantalum composite porous bone defect repairing bracket and a preparation method thereof. The bracket comprises a porous titanium inner frame unit body and a porous tantalum outer unit body which is coated on the periphery of the porous titanium inner frame unit body. The bracket has the characteristics of small overall specific gravity and light weight, and has a more ideal bone affinity capacity than the porous titanium. The porous titanium inner frame unit body and the porous tantalum outer unit body have different pore structure shapes, and a bone implant with excellent mechanical properties can be obtained. The bracket has a porous structure, and the porous metal material has the advantages of light weight and large specific surface area. The interconnected pores in the bracket are more conducive to promoting cell adhesion and bone tissue healing and growth. The bracket has the two advantages of high specific strength, low elastic modulus, low density, corrosion resistance, good biocompatibility of titanium and its alloy and excellent bioactivity and osteogenesis of tantalum metal.

The invention provides a method for repairing and recycling waste lithium iron phosphate, a positive pole piece and a lithium ion battery, the method for repairing and recycling waste lithium iron phosphate comprises the following steps: constructing a battery, the battery comprises a positive electrode, a negative electrode, electrolyte, a first current collector and a second current collector, the first current collector is arranged on one side, facing the negative electrode, of the positive electrode, the second current collector is arranged on one side, facing the positive electrode, of the negative electrode, the positive electrode comprises a waste lithium iron phosphate pole piece, and the negative electrode is a metal material with the oxidation-reduction potential lower than that of lithium iron phosphate. The electrolyte comprises a lithium source and water, and the first current collector and the second current collector are porous titanium current collectors; performing constant-current discharge on the battery to obtain a repaired lithium iron phosphate pole piece; and removing the porous titanium current collector to obtain the repaired lithium iron phosphate. The invention aims to recycle the waste lithium iron phosphate pole piece.

The application discloses a method for connecting sintered porous titanium auxiliary brazing of sapphire and metal material, which comprises the following steps: adding TiZrCuNi filler metal powder into a binder, stirring uniformly, and then preparing TiZrCuNi solder paste, wherein the TiZrCuNi metal powder is 86-91wt.% and the binder is 9-14wt.% according to the mass percentage of raw materials; preparing a sintered porous titanium intermediate layer skeleton material; setting the metal matrix on the lower side, laying a layer of TiZrCuNi solder paste with a thickness of 0.2mm-0.4mm on the upper side; pressing the sintered porous titanium intermediate layer skeleton material into the solder paste layer, and filling the TiZrCuNi metal powder into the sintered porous titanium intermediate layer skeleton material; laying TiZrCuNi solder paste with a thickness of 0.4mm-0.6mm on the upper surface of the sintered porous titanium intermediate layer skeleton material, and pressing the sapphire; and then performing brazing treatment, so as to realize the connection of the sapphire and the metal material. The application relieves the residual stress caused by the difference in characteristics of the two side matrices, and improves the brazing connection reliability of the sapphire and the metal.