15 results about "Titanium surface" patented technology

The invention relates to the technical field of etching solutions, and particularly discloses an etching solution for inhibiting etching of metallic titanium and application of the etching solution. The etching solution contains hydrofluoric acid, ammonium fluoride, an additive 1 and an additive 2; wherein the additive 1 is a fluorine capture type inhibitor, and the additive 2 is a surface adsorption type organic protective agent. The etching solution can effectively inhibit the corrosion of a titanium layer while keeping the high etching rate of silicon oxide, obviously improves the etching selection ratio of silicon oxide to titanium, has lower surface tension and higher uniformity, and is suitable for a wet etching scene with a complex structure. The additive 1 captures free fluorine ions through complexation or precipitation, the activity of the fluorine ions is reduced, and therefore the chemical attack on the titanium surface is reduced; and the additive 2 can form a transient adsorption protective film on the titanium surface to further delay the dissolution of titanium. The synergistic effect of the two additives can effectively inhibit titanium corrosion and maintain high etching efficiency.

The application relates to a low-cost surface titanium doping method of a lithium-rich positive electrode material and belongs to the field of lithium ion battery positive electrode materials. Specifically, the method comprises the following steps: placing the positive electrode material into a solution with a specific pH, then continuously stirring and adding a titanium sulfate solution into the solution; filtering the solid powder obtained after reaction for a certain time, drying, and sintering at high temperature to obtain the titanium surface-doped positive electrode material. The lithium-rich positive electrode material prepared by the method has improved first circle coulomb efficiency, discharge specific capacity and cycle performance, the process is simple, the cost is lower than that of an organic titanium source, the method is suitable for large-batch treatment of the lithium-rich positive electrode material, the use demand of the power battery can be met, and the method has a good application prospect.

The application discloses a pure titanium nanometer scale oxide layer nanometer probe precise detection method, which comprises the following steps: S1, preparing a titanium sample to be measured, and pretreating the titanium sample to be measured to make the surface of the titanium sample to be measured smooth; S2, selecting multiple test points on the surface of the titanium sample to be measured and marking the test points, using a pressure head of a nano indentation instrument to make an indentation on the marked test points, and obtaining surface indentation data; S3, selecting multiple test points on the cross section of the titanium sample to be measured and marking the test points, using the pressure head of the nano indentation instrument to make an indentation on the marked test points, and obtaining cross section indentation data; S4, summing up the maximum contact depth in the surface indentation data of each test point and taking an average value, and marking the average value as a; summing up the maximum contact depth in the cross section indentation data of each test point and taking an average value, and marking the average value as b; and taking a difference between a and b to obtain an influence value of the oxide layer on the titanium surface. The application can simply and quickly evaluate the influence of the oxide layer on the titanium surface by using the nano indentation method.

This invention belongs to the field of biomass materials technology, specifically relating to a titanium-doped biochar, its preparation method, and its applications. In this invention, supercritical fluid is used for composite processing. Its unique high diffusion and low surface tension characteristics enable uniform distribution of the titanium source within the protein fibers and induce condensation reactions between hydroxyl groups on the titanium surface and carboxyl groups in the protein fibers within the supercritical system, forming high-density Ti-O-C chemical bonds. Furthermore, low-temperature thermal induction is performed based on the supercritical pre-swollen matrix structure to complete the ordered reconstruction of the carbon skeleton structure and the regulation of active sites, achieving in-situ self-doping of N and S while avoiding the TiO2 phase transformation. This further improves the stability and photocatalytic performance of the titanium-doped biochar, enabling visible light response.

The invention discloses a preparation method of a titanium metal surface laser sintering rare earth metal modified polyether-ether-ketone composite material, and belongs to the field of dental implants. The invention aims to solve the technical problem of poor interface bonding property between polyether-ether-ketone and titanium metal. The method comprises the following steps: completely dissolving CeCl3 and urea in an ethanol water solution, immersing hydroxylated polyether-ether-ketone in the CeCl3 solution at room temperature, heating for reaction, cooling to room temperature, cleaning and drying to obtain cerium oxide modified polyether-ether-ketone powder; the surface of a titanium metal substrate is pretreated, the titanium metal substrate is placed in a forming cavity of additive manufacturing equipment, cerium oxide modified polyether-ether-ketone powder is formed in a powder feeding cavity under the protection of inert gas through a laser powder bed melting technology, heat preservation treatment is conducted after printing is finished, and then the method is completed. According to the method, a Ti-O-Ce bonding or CeTiO4 spinel structure is formed on the surface of cerium oxide and titanium, an interface inert layer is broken, chemical bond bonding of polyether-ether-ketone and a titanium matrix is achieved, and the interface bonding strength is remarkably improved.

The application relates to the technical field of dental implants, in particular to a trans-zygomatic implant and a processing technology thereof, and the processing technology comprises variable-distance multi-stage sand blasting and acid etching surface treatment on an anchoring part with threads of the trans-zygomatic implant and electrochemical polishing surface treatment on an extension part without threads. The trans-zygomatic implant is treated by variable-distance multi-stage sand blasting combined with acid etching, so that a uniform micron-level rough base and a multi-stage micropore structure can be formed on the titanium surface, osteoblast adhesion and differentiation are facilitated, the early bone combination speed is accelerated, the combination strength is improved, the early implant loosening risk is reduced, the extension part of the trans-zygomatic implant is treated by electrochemical polishing, a smooth surface can be obtained, plaque adhesion and bacterial colonization are greatly reduced, the implant peri-implantitis risk is reduced, and soft tissue adhesion is promoted; the dual optimization of bone anchoring and tissue adhesion is realized, and the long-term function and health of the trans-zygomatic implant under complex stress are guaranteed.

A liquid chromatography apparatus includes a diffusion-bonded separation column comprising a lower substrate comprising titanium, an upper substrate comprising titanium, and a titanium patterned foil disposed between the lower substrate and the upper substrate. The lower substrate, titanium patterned foil, and upper substrate are diffusion bonded together to form a fluid path extending from an inlet port to an outlet port, wherein walls defining the fluid path within the diffusion-bonded separation column include a titanium surface coating.

Provided are methods and apparatus for bonding metals. In an example, a provided method includes (i) disposing a layer of Vanadium onto a first Titanium surface of a first tangible object, (ii) placing a second Titanium surface of a second tangible object in direct contact with the layer of Vanadium, and (iii) imparting, using a sonotrode, compressive and shear forces to the first Titanium surface, the layer of Vanadium, and the second Titanium surface, to cause plastic deformation that bonds the first Titanium surface to the second Titanium surface.

The invention relates to the technical field of medical materials, and particularly discloses a titanium surface composite coating with osteogenesis promoting and antibacterial functions. The micro-arc magnesium oxide coating is arranged on the surface of the titanium substrate; the chitosan coating is arranged on the surface of the micro-arc magnesium oxide coating; the chlorogenic acid is loaded in the chitosan coating; a magnesium-containing porous microstructure is constructed on the surface of a titanium substrate through a micro-arc oxidation technology, so that the biological activity and corrosion resistance of the coating are improved; furthermore, chitosan is used as a biocompatible carrier to load a traditional Chinese medicine active ingredient chlorogenic acid, so that the surface of the implant has excellent osteogenic differentiation promoting capability and broad-spectrum antibacterial property at the same time. Physical modification, biopolymer drug loading and traditional Chinese medicine active ingredients are combined, and the problems that a traditional titanium implant is high in surface biological inertness, infection is likely to be caused and osseointegration is poor are solved through the synergistic effect on the three aspects of the structure, the material and the biological function.

The invention belongs to the technical field of preparation of titanium alloy pipe fittings from recycled coarse powder, and particularly relates to a low-cost method for preparing titanium alloy pipe fittings from recycled coarse powder, which comprises the following steps: firstly, recycling titanium alloy coarse powder with the particle size of more than 100 mu m, then exposing a fresh titanium surface through hydrogenation fragmentation by utilizing a hydrogenation dehydrogenation (HDH) technology, adsorbing oxygen in the atmosphere, and diffusing for solid solution; the O content of the powder is increased; interstitial O atoms can be subjected to pinning dislocation, so that the yield strength, tensile strength and hardness of sintered parts are remarkably improved, and low cost and high performance are realized (namely, the O content of powder is improved through HDH, and a basis is provided for good performance of subsequent parts); according to the preparation method, coarse powder with low utilization rate is recycled through a set of complete preparation process, the cost for preparing the titanium alloy pipe fitting is reduced, and meanwhile, the performance of the titanium alloy pipe fitting is improved.

A titanium superhydrophobic surface comprising a coating of a perfluorosilane on contiguous titania micrograins surrounded by crevices, the micrograins comprising a topography of nanopits shaped by contiguous peaks and valleys. The superhydrophobic surface has significantly increased hemocompatibility and enhanced antibacterial properties compared to an unmodified titanium surface. The increased hemocompatibility was confirmed by reduced platelet adhesion, reduced leukocyte adhesion, and reduced thrombus formation. The surface is prepared by a facile hydrothermal treatment of a titanium surface with sulfuric acid, leading to the formation of a unique micro-nano surface topography. The superhydrophobic surface was then achieved by coating the micro-nano titanium surface with a low energy silane using physical vapor deposition.

The present application belongs to the technical field of surface modification of biomedical materials, and specifically relates to a method for preparing a gradient-size nanowire coating on a medical titanium surface, comprising the following steps: first, titanium sheets are subjected to acid pickling pretreatment to remove the surface oxide layer, then sodium hydroxide solution is uniformly and slowly added dropwise, and a continuous-size nanowire coating is obtained through a gradient alkali etching method, laying a foundation for accurate screening of the size of the nanowire coating based on the functions of bone integration-related cells. In addition, compared with traditional orthogonal experiment screening materials, this gradient screening can realize accurate screening of the material structure, improve the screening efficiency, and the required equipment is simple, low in cost, and high in operability, and has high practicability.

The invention provides preparation and application of a titanium surface / implant self-assembly coating, and relates to the technical field of high polymer materials. The preparation and application of the titanium surface / implant self-assembled coating specifically comprise the following preparation steps of S1, pretreatment and modification of a titanium substrate, S2, preparation of the self-assembled coating, S3, characterization of a test piece and S4, evaluation of cytocompatibility, and the prepared finished product is applied to promotion of early osseointegration of a titanium implant in a complex implantation microenvironment. The success rate and the stability of the implant are improved. CeNPs and EGCG are modified on the surface of the titanium implant through a layer-by-layer self-assembly (LBL) technology, and the CeNPs and EGCG on the surface of the prepared implant can be slowly released along with degradation of a sandwich-shaped coating, so that the antioxidant osteogenic activity is synergistically exerted, the osseointegration demand of an organism in a complex implantation microenvironment is met, and more possibilities are provided for early-stage osseointegration of the implant.

The application discloses a high-roughness titanium surface conductive layer and a preparation method thereof, and belongs to the technical field of metal surface processing and modification. 5 ~2×10 6 S / m, and is composed of titanium nitride-doped titanium dioxide; the conductive layer is in-situ grown on a titanium base and has hydrophilicity and corrosion resistance. The preparation method comprises the following steps: (1) acid etching treatment of titanium; (2) primary anodic oxidation of titanium; and (3) secondary anodic oxidation of titanium. The application can simplify the pretreatment process of titanium electrode preparation, reduce the production energy consumption of the titanium electrode, and improve the performance of the titanium electrode. The titanium base surface generating the conductive layer can be directly used in electrochemical application fields such as electroplating and electrodeposition.

The invention discloses a preparation method of a Ti-TiO2 metal ceramic wear-resistant gradient coating on a pure titanium surface. The method comprises the following steps: respectively pretreating a pure titanium substrate, Ti powder and TiO2 powder; weighing the pretreated Ti powder and TiO2 powder according to the mass ratio of Ti to TiO2 in the bottom coating, the middle coating and the surface coating of the substrate, and uniformly mixing to obtain bottom powder, middle powder and surface powder; and sequentially carrying out bottom layer cladding, middle layer cladding and surface layer cladding on the surface of the pretreated pure titanium substrate to obtain the Ti-TiO2 metal ceramic gradient coating. According to the preparation method of the Ti-TiO2 metal ceramic wear-resistant gradient coating on the pure titanium surface, the formed metal ceramic gradient coating is good in interlayer bonding and good in wear resistance, the service performance of pure titanium can be improved, and the service life of the pure titanium can be prolonged.