10 results about "Sodium titanate" patented technology

The application provides a 650MPa-grade ultra-supercritical high-temperature steel welding electrode and a coating and deposited metal, and belongs to the field of welding materials.The raw material of the coating comprises, in weight parts, 39-43 parts of magnesia, 30-35 parts of fluorite, 3-5 parts of dolomite, 5-10 parts of ferrosilicon, 2-5 parts of sodium titanate, 10-15 parts of metallic chromium powder, 0.1-0.4 parts of chromium oxide green, 0.1-0.3 parts of aluminum-magnesium alloy and 1.5-2.5 parts of sodium alginate.Through the research on the composition of the coating, the sodium titanate and the aluminum-magnesium alloy are added to stabilize the electric arc, the electric arc has stability and concentration when high-current welding is performed, the weld pool temperature is moderate, the fluidity of the molten iron is moderate, the electric arc blowing force is stable and concentrated, and the welding operation performance is good.

This invention belongs to the field of metallurgical solid waste resource utilization technology, specifically disclosing an iron-based additive, its preparation method, and its application. The preparation method includes: mixing red mud, sodium salt, and a reducing agent; subjecting the mixture to reduction roasting to obtain reduced clinker; grinding and separating the reduced clinker by magnetic separation to obtain iron concentrate, thus obtaining the iron-based additive. This invention uses red mud, sodium salt, and a reducing agent stored in alumina plants as raw materials. The sodium salt significantly lowers the reduction temperature of iron ore, and by controlling the temperature and the amount of reducing agent added, the hematite is partially or completely reduced. The resulting iron-based additive is returned to the Bayer process leaching, which can significantly improve the alumina leaching rate. Simultaneously, the titanium minerals in the obtained titanium-containing tailings exist in a specific phase or in the form of amorphous sodium titanate, exhibiting higher reactivity. This invention realizes the recycling and value-added utilization of solid wastes such as red mud, and has good application prospects.

The present application relates to the technical field of welding material, and discloses a kind of ultra-low carbon bainite high-strength steel matched flux-cored wire for high-speed train bogie and welding method.The flux-cored wire of the present application includes outer skin and flux filled in the outer skin, and the flux includes the following components by mass fraction: sodium fluoride 23-28%, CaCO3 8-15%, sodium titanate 12-15%, natural rutile 5-10%, potassium feldspar 4-7%, electrolytic manganese 6-10%, ferrosilicon 4-6%, nickel powder 6-9%, copper powder 0.5-0.8%, molybdenum iron 2.5-4%, niobium iron 0.2-0.3%, titanium iron 1.2-1.8%, and iron powder 8.6-13.1%.The flux-cored wire of the present application is used for welding of the steel in the manufacture of high-speed train bogie frame, and the weld metal has excellent strength, toughness and corrosion resistance, the weld is fine and has low risk of fatigue cracking, and meets the high standard requirements in the manufacture and service of high-speed train bogie.

The embodiment of the present application relates to a calcium ion doped modified sodium lithium titanate material and a preparation method thereof, a negative plate and a battery, and belongs to the technical field of lithium ion battery negative materials.The embodiment of the present application aims to solve the technical problems of poor conductivity, low reversible capacity and poor cycle stability of sodium lithium titanate as a negative material in the prior art.The calcium ion doped modified sodium lithium titanate material of the embodiment of the present application has a chemical molecular formula of: Na2Ca x Li 2‑x Ti6O 14 , wherein the value range of x is 0 <= x <= 0.30.The material provided in the embodiment of the present application shows a higher discharge specific capacity, a lower internal resistance and a better cycle life in electrochemical tests, which indicates that the material has potential in the application of lithium ion batteries and can meet the performance and cycle life requirements.

This invention relates to the field of piezoelectric ceramics technology, specifically to a high-electrostrain bismuth sodium titanate-based lead-free piezoelectric ceramic material and its preparation method. The general chemical formula of the ceramic material is: (Bi 0.5 Na 0.5 ) (1‑x) (Ca 0.5 Sr 0.5 ) x Ti 0.98 (Sn 0.5 Sb 0.4 ) 0.02 O3, in which x =0.03~0.4. Its preparation method includes: weighing raw materials according to stoichiometric ratio, ball milling and mixing, pre-calcination synthesis, secondary ball milling, granulation and molding, and debinding sintering. This invention introduces Ca at the A-site. 2+ and Sr 2+ Constructing quasi-isomorphic phase boundaries to lower the polarization energy barrier; introducing Sn through the B site. 4+ and Sb 3+ The formation of defect dipoles pins domain walls and enhances the random field. These two factors work synergistically to significantly improve the electrostrain properties of the material; the prepared ceramic exhibits a maximum strain of [value missing] under an electric field of 100 kV / cm. S max The inverse piezoelectric coefficient is 2.18%, the inverse piezoelectric coefficient is 2572 pm / V, and the memory strain is 2.18%. S r With a lead content of 1.19%, and a simple, environmentally friendly process, it is suitable for mass production and has broad application prospects in the field of high-performance lead-free actuators.

The invention relates to a bimetal MOFs modified titanium implant capable of achieving dual-waveband optical response and a preparation method and application thereof. The method comprises the following steps: (1) pretreating titanium-based metal; (2) immersing the pretreated titanium-based metal substrate into a sodium hydroxide solution to obtain titanium-based metal with a sodium titanate pre-coating; and (3) the titanium-based metal with the sodium titanate pre-coating reacts with a mixed solution composed of a tetrabutyl titanate solution, a copper nitrate hexahydrate solution and a 2-aminoterephthalic acid solution, and the bi-metal MOFs modified titanium implant capable of achieving dual-waveband optical response is obtained. According to the bimetal MOFs modified titanium implant capable of achieving dual-waveband optical response, OH, O2, 1O2, H2O2 and other various active oxygen can be produced according to dual-waveband illumination as required, rapid sterilization in an operation and precise antibacterial after the operation are achieved, the occurrence rate of infectious bone defect feeling is remarkably reduced, and a programmable photocatalytic antibacterial barrier is provided for orthopedic implants.

The application provides a Q690qENH coating-free bridge steel welding wire, a flux core and a cladding metal, and belongs to the field of welding materials.The raw material of the flux core comprises, in terms of weight parts, titanium dioxide: 3.0-3.5 parts, silicon-zirconium-iron: 3-6 parts, sodium-calcium-silicate: 0.6-1.2 parts, potassium-sodium titanate: 0.3-0.5 parts, magnesium powder: 0.1-0.6 parts, metallic titanium: 0.1-0.3 parts, metallic manganese: 1-3 parts, nickel powder: 0.8-1.4 parts, copper powder: 0.10-0.40 parts, chromium-iron: 0.5-0.8 parts, molybdenum-iron: 0.3-0.6 parts, aluminum oxide: 0.2-0.4 parts, iron powder: 0.6-2.0 parts, and manganese-silicon alloy: 0.4-0.8 parts, so as to solve the problem that the welding material in the prior art is not suitable for the welding of the Q690qENH coating-free bridge steel.

This invention discloses an in-situ reaction-generated sodium titanate-coated modified oxygen cathode material and its preparation method, belonging to the field of battery cathode material technology. The preparation method includes: first, ball milling and mixing a nickel source, an iron source, a manganese source, and a sodium source, followed by high-temperature sintering at 800–1000℃ to obtain an O3 phase cathode material matrix; then, ball milling and mixing the obtained matrix material with a trace amount of titanium-containing compound, followed by a secondary sintering at a lower temperature of 500–600℃. The titanium-containing compound undergoes an in-situ solid-phase chemical reaction with residual sodium carbonate on the matrix surface to generate a sodium titanate coating layer chemically bonded to the matrix, primarily composed of the Na2TiO3 crystalline phase. This coating layer possesses both fast sodium ion conduction characteristics and the ability to chemically neutralize acidic substances in the electrolyte, significantly reducing interfacial impedance, improving rate performance, and effectively suppressing transition metal dissolution and interfacial side reactions, thereby endowing the material with excellent high-voltage cycle stability and long lifespan.

The application provides a welding wire, a flux core and a cladding metal suitable for welding of 09CrCuSb steel, and belongs to the field of welding materials.The raw material of the flux core comprises, in weight parts, 3.0-6.0 parts of natural rutile, 1-3 parts of 75# ferrosilicon powder, 0.2-0.5 parts of sodium titanate, 0.1-0.3 parts of aluminum powder, 0.2-0.3 parts of fluoride, 1-3 parts of manganese iron powder, 0.6-1.2 parts of metallic chromium, 0.20-0.80 parts of copper powder, 0.2-0.4 parts of ferrochrome, 0.2-0.5 parts of quartz sand, 0.1-0.3 parts of antimony powder, 0.8-1.8 parts of iron powder and 0.4-1.0 parts of electrolytic manganese, so as to solve the problem of poor sulfuric acid dew point corrosion resistance of the cladding metal formed by welding of 09CrCuSb steel in the prior art.

The application belongs to the technical field of water treatment, and particularly relates to a defective sodium titanate nanotube and application thereof. The defective sodium titanate nanotube is prepared by taking titanium dioxide and a sodium hydroxide or alkaline sodium salt solution as raw materials, and then introducing oxygen vacancy defects through one-step thermal reduction in a reducing gas atmosphere. The defective sodium titanate nanotube is loaded on a support film material to obtain a defective sodium titanate nanotube catalytic film. The defective sodium titanate nanotube in the catalytic film presents a one-dimensional hollow tubular structure, and can maintain a higher permeation flux. Meanwhile, the surface of the defective sodium titanate nanotube is rich in oxygen vacancy defects, which is conducive to providing more catalytic active sites and enhancing the mass transfer efficiency of ozone and the interfacial reaction activity. Therefore, the catalytic film can efficiently degrade refractory organic pollutants in wastewater, especially ozone-inert organic pollutants, achieves the integration of catalyst separation and pollutant degradation, and provides an efficient solution for water treatment.