18 results about "Lanthanum fluoride" patented technology

The invention specifically discloses a positive plate and a lithium ion battery applying the same. The positive plate comprises a current collector, a bottom coating and a positive active material layer, the bottom coating and the positive active material layer are sequentially arranged on at least one surface of the current collector, and the bottom coating is located between the current collector and the positive active material layer; the bottom coating layer comprises lanthanum fluoride nanoparticles and lithium aluminum titanium phosphate; the positive active material layer includes a ternary active material. The high-temperature-resistant performance of the high-nickel lithium battery can be remarkably improved while the high-nickel lithium battery has the dynamic performance of the high-nickel lithium battery.

The invention discloses a flexible silicon-based negative electrode material and a preparation method and application thereof.The unit structure of the flexible silicon-based negative electrode material is obtained by taking carbon fiber as a substrate, growing a vertical carbon nano tube through chemical vapor deposition and sequentially carrying out magnetron sputtering on nano silicon and lanthanum fluoride on the surface of the vertical carbon nano tube, and the preparation method of the flexible silicon-based negative electrode material comprises the following steps that S1, the carbon fiber is pretreated; s2, growing SiO2 on the surface of the carbon fiber; s3, vertically growing a carbon nanotube through chemical vapor deposition, heating to 800-900 DEG C in an inert atmosphere, injecting the precursor solution, keeping the temperature for 30-40 minutes, cooling to room temperature, and taking out; s4, carrying out surface magnetron sputtering of nano silicon; and lanthanum fluoride is subjected to magnetron sputtering on the surface of S5, the vertical carbon nanotubes can effectively accommodate volume expansion of silicon without damaging the integrity of the overall electrode structure, and the lanthanum fluoride (LaF3) subjected to magnetron sputtering remarkably improves the interface stability and the overall performance of the electrode.

The invention belongs to the technical field of rare earth aluminum alloy production, and discloses a method for preparing an aluminum-yttrium alloy wire in a continuous and stable temperature reduction manner, which comprises the following steps: weighing the following raw materials in parts by weight: 75-85 parts of aluminum ingot, 4.5-5.5 parts of aluminum fluoride, 4.5-5.5 parts of yttrium oxide, 5-10 parts of lanthanum fluoride and 2-4 parts of calcium fluoride; an aluminum ingot is taken and placed in a medium-frequency smelting furnace to be heated and melted into metal aluminum melt; the metal aluminum melt is taken and placed in a medium-frequency smelting furnace to be heated, aluminum fluoride, yttrium oxide, lanthanum fluoride and calcium fluoride are sequentially added for smelting, and an alloy solution is obtained; and putting the alloy solution into a holding furnace, adding lanthanum fluoride and calcium fluoride, cooling to 700-720 DEG C, continuing smelting, feeding the smelted alloy solution into continuous casting extrusion equipment, cooling, casting and extruding to obtain an aluminum yttrium wire rod product. The method is simple in process and convenient to operate, and the problem that in the aluminum-yttrium alloy machining process, alloy crystals are distributed unevenly, and the performance of the obtained wire is reduced due to coarse grains can be solved.

The invention provides a submerged-arc welding flux for T / P 91 and T / P 92 steel of an ultra-supercritical thermal power generating unit. The submerged-arc welding flux comprises the following components: 36-42% of fluorite, 3-8% of aluminum fluoride, 0.6-2.2% of lanthanum fluoride, 1-6% of marble, 1-3% of magnesite, 3-8% of alpha-type aluminum oxide, 1-3% of bentonite, 2-5% of bauxite, 2-8% of cryolite, 5-15% of fused magnesite, 2-6% of wollastonite, 6-14% of manganese-silicon alloy and 1.2-2.8% of silicon-calcium alloy. When the submerged-arc welding flux is matched with T / P91 and T / P92 steel submerged-arc welding wires, the welding weldability is excellent, no iron particle bulge or undercut exists in a welding seam, a weld toe line is neat, deslagging is excellent, and the welding seam is attractive in forming. The obtained deposited metal is low in crack sensitivity and porosity, excellent in high-temperature creep property, good in impact toughness and low in temper brittleness.

A solid-state imaging device according to an embodiment includes: a semiconductor substrate including a photoelectric conversion element; a lens disposed above a first light incident surface of the photoelectric conversion element; and a plurality of columnar structures disposed on a surface parallel to the first light incident surface that is located between a second light incident surface of the lens and the first light incident surface of the photoelectric conversion element. The columnar structure includes at least one of silicon, germanium, gallium phosphide, aluminum oxide, cerium oxide, hafnium oxide, indium oxide, tin oxide, niobium pentoxide, magnesium oxide, tantalum pentoxide, titanium pentoxide, titanium oxide, tungsten oxide, yttrium oxide, zinc oxide, zirconia, cerium fluoride, gadolinium fluoride, lanthanum fluoride, and neodymium fluoride.

The application discloses a welding rod for 1000MPa high-strength steel and a preparation method thereof. The welding rod comprises a coating and a welding core, and the coating is wrapped on the outside of the welding core. The coating powder comprises the following components in parts by weight: 30-35 parts of fluorite, 20-30 parts of dolomite, 5-8 parts of strontium carbonate, 2-5 parts of sodium titanium silicate, 5-10 parts of potassium oxalate, 5-10 parts of atomized ferrosilicon, 2-5 parts of titanium powder, 0.5-1.0 parts of lanthanum cerium fluoride, 1-5 parts of lithium carbonate, 1-2 parts of sodium carboxymethyl starch, 0.5-1.5 parts of copper powder and 8-15 parts of iron powder. The welding rod has excellent all-position welding process performance, the arc is stable during welding, fine droplet transition is presented, the molten slag has moderate fluidity, the welding spatter is small, and the weld formation is fine and beautiful.

The invention discloses a hot press molding process of Mg / PVDF pyrotechnic composition, and relates to the technical field of pyrotechnic composition material preparation. According to the process, magnesium powder and modified polyvinylidene fluoride are used as raw materials, an additional binder does not need to be added, and the modified polyvinylidene fluoride is prepared by compounding polyvinylidene fluoride and silane modified nano lanthanum fluoride. The pyrotechnic composition finished product is prepared through the steps of screening, wet mixing and grinding, die-filling oscillation, hot press molding, demolding and trimming and the like. Polyvinylidene fluoride is selected to replace traditional polytetrafluoroethylene as an oxidizing agent, has appropriate melting point and decomposition point characteristics, forms a stable hot working interval, is high in fluorine content, and can fully react with magnesium powder to release energy. The process improves the forming quality and combustion stability of the pyrotechnic composition.

The invention discloses a photovoltaic lanthanum fluoride and zinc co-doped tin oxide target material and a preparation method thereof, and belongs to the technical field of new materials and solar cells. The method comprises the following steps: preparing composite slurry from lanthanum fluoride, zinc nitrate and SnCl4. 5H2O through a hydrothermal reaction, cleaning the composite slurry, sequentially carrying out three-step sequential surface modification on the slurry by using a boric acid ester coupling agent, sodium aliphatate, sodium polyacrylate and a sodium citrate solution, and carrying out spray drying, stepped cold isostatic pressing forming and segmented temperature-controlled sintering, so as to obtain the composite material. And finally processing and binding to obtain the target material. According to the invention, through hydrothermal synthesis and sequential surface modification, uniform distribution of doped elements and excellent dispersity of powder are realized; the high-density and low-resistivity target material is obtained through a unique low-pressure-high-pressure-medium-pressure stepped pressing process and segmented sintering. The method is environment-friendly in process, the green dispersing agent is used, wastewater discharge is reduced, and the prepared target material is suitable for preparing a high-performance transparent conductive film.

The invention discloses main shaft bearing lubricating grease for a wind driven generator and a preparation method thereof, and relates to the technical field of lubrication, and the main shaft bearing lubricating grease comprises the following components in parts by weight: 75-85 parts of base oil, 8-15 parts of a thickening agent, 2-6 parts of an anti-wear reagent at extreme pressure, 0.5-3 parts of an antioxidant, 0.5-2 parts of an anti-rust preservative, 1-3 parts of a structure control agent and 0.2-1 part of a metal deactivator. The base oil is a mixture of high-viscosity poly-alpha-olefin PAO and metallocene poly-alpha-olefin mPAO; the thickening agent is composite lithium calcium soap generated by reaction of 12-hydroxystearic acid, azelaic acid, lithium hydroxide and calcium hydroxide; the structure control agent is vinyl silicone oil; the extreme pressure anti-wear agent is a compound mixture of nano lanthanum fluoride, molybdenum dialkyl dithiocarbamate (MoDTC) and antimony dialkyl dithiophosphate; according to the preparation method, vinyl silicone oil is added in a specific high-temperature stage and a specific cooling rate is combined; the prepared main shaft bearing lubricating grease has better extreme pressure anti-wear performance and long service life, and has better adhesivity independent of a tackifier and better composite synergistic interaction optimization.

The application belongs to the technical field of infrared coating and discloses a high-durability antireflection film for chalcogenide glass in the 3-5 mu m infrared band, which comprises a film system structure symmetrically arranged on both sides of a chalcogenide glass substrate, wherein the film system structure comprises, in sequence from the inside to the outside of the chalcogenide glass substrate, a first germanium layer, a first zinc sulfide layer, a second germanium layer, a second zinc sulfide layer, a third germanium layer, a third zinc sulfide layer, a ytterbium fluoride layer, a fourth zinc sulfide layer and a lanthanum fluoride layer. The film system structure is arranged on the chalcogenide glass substrate to improve the wear resistance, corrosion resistance and transmittance of the lens.

The present application relates to a kind of preparation method of silicon oxide package praseodymium lanthanum fluoride yolk-shell structure nanosphere, belong to nanometer material preparation technical field.The present application includes three steps:(1) preparation of electrospray solution;(2) using single-axis electrospray ionization technology to prepare PVP / [La (NO3) 3+Pr (NO3) 3+TEOS] Composite nanosphere;(3) preparation of LaF3:Pr 3+ @SiO2 Yolk-shell structure nanosphere, using ammonium hydrogen fluoride as fluorination reagent, activated carbon particle is auxiliary reducing agent, using double crucible fluorination technology, composite nanosphere is heated fluorination treatment in air, obtain LaF3:Pr 3+ @SiO2 Yolk-shell structure nanosphere, average diameter is 794.08±4.89 nm.The preparation method of the present application is simple and easy to operate, and can be mass-produced, and the nanometer material with this special structure has broad application prospect.

The invention provides a crystallization defluorination method for fluorine-containing wastewater in the presence of high-concentration sulfate radicals, and belongs to the technical field of water treatment.The crystallization defluorination method comprises the following steps that before defluorination is conducted on fluorine-containing water containing the high-concentration sulfate radicals, lanthanum fluoride crystal seeds, a composite regulator and a defluorination agent lanthanum hydroxide are added into the water, crystallization reaction conditions are controlled, and the fluorine-containing water containing the high-concentration sulfate radicals is obtained. Enabling fluorine ions and lanthanum hydroxide to form a stable fluorine lanthanum compound crystal through directional crystallization; fluorine lanthanum compound crystals are removed through solid-liquid separation, and deep fluorine removal of the water body is achieved. According to the present invention, with the lanthanum hydroxide crystallization method, by using the extremely low solubility product of the fluorine lanthanum compound, the efficient fixation of the fluorine ions can still be achieved under the interference of the high-concentration sulfate radical, the fluorine concentration of the treated water body is stably reduced to less than 10 mg / L, the secondary pollution is avoided, and the defects of poor selectivity and easy saturation in the high sulfate radical environment of the traditional adsorption method are overcome; the method is suitable for treating high-salt fluorine-containing water bodies such as mining area wastewater and metallurgical fluorine-containing wastewater.

A solid-state imaging device according to an embodiment includes: a semiconductor substrate including a photoelectric conversion element; a lens disposed above a first light incident surface of the photoelectric conversion element; and a plurality of columnar structures disposed on a surface parallel to the first light incident surface that is located between a second light incident surface of the lens and the first light incident surface of the photoelectric conversion element. The columnar structure includes at least one of silicon, germanium, gallium phosphide, aluminum oxide, cerium oxide, hafnium oxide, indium oxide, tin oxide, niobium pentoxide, magnesium oxide, tantalum pentoxide, titanium pentoxide, titanium oxide, tungsten oxide, yttrium oxide, zinc oxide, zirconia, cerium fluoride, gadolinium fluoride, lanthanum fluoride, and neodymium fluoride.

This invention relates to the field of lubricating grease technology, and more particularly to a lubricating grease composition, its preparation method, and its application. The lubricating grease composition comprises: a base oil, a thickener, and additives; the base oil is composed of alkyl naphthalene synthetic oil and ester synthetic oil; the additives include extreme pressure anti-wear agents; the extreme pressure anti-wear agents include at least two selected from nano-lanthanum fluoride, nano-cerium oxide, calcium silicate, triphenyl phosphate, graphite, and molybdenum disulfide. The wind turbine lubricating grease provided by this invention not only exhibits excellent high and low temperature performance and superior oxidation resistance, but also possesses better lubricity and adhesion, effectively reducing friction and wear on equipment. It can adapt to the operating requirements of wind turbine equipment under harsh conditions such as extreme temperatures, humidity, and salt spray, avoiding equipment failures and downtime caused by poor lubrication, and significantly extending the service life of wind turbine bearings.

The invention discloses a method for determining calcium, magnesium, barium, strontium, zinc and aluminum in lanthanum fluoride, dysprosium fluoride and gadolinium fluoride, through the innovative combination of perchloric acid fuming and fluorine removal and ICP-OES horizontal observation, the detection pain points of lanthanum fluoride, dysprosium fluoride and gadolinium fluoride samples are specifically solved, the blank that the samples have no detection method is filled, and the detection accuracy of the lanthanum fluoride, dysprosium fluoride and gadolinium fluoride samples is improved. And through accurate sample treatment and instrument parameter optimization, rapid, accurate and environment-friendly determination of six impurity elements is realized.

The invention discloses a method for preparing a high-strength and high-toughness aluminum-lanthanum metal alloy by blending waste aluminum. The method comprises the following steps: weighing the following raw materials in parts by weight: 15-25 parts of waste aluminum, 70-80 parts of aluminum ingots, 1-2 parts of aluminum fluoride, 2-8 parts of lanthanum fluoride and 3-5 parts of calcium fluoride; waste aluminum is taken and placed in a fuel gas aluminum melting furnace to be heated to 800 DEG C, then aluminum fluoride and part of calcium fluoride are added, mixed and smelted, and waste aluminum melt is obtained; the waste aluminum melt is taken and subjected to heat preservation at the temperature of 750-800 DEG C, then aluminum ingots, lanthanum fluoride and remaining calcium fluoride are sequentially added for smelting, and an alloy solution is obtained; the alloy solution is taken and placed in a heat preservation kiln to be cooled to 300 DEG C to 320 DEG C, then the alloy solution is naturally cooled to the room temperature, the aluminum-lanthanum metal alloy is obtained, the tensile strength of the aluminum-lanthanum metal alloy is 280 MPa to 330 MPa, and the yield strength of the aluminum-lanthanum metal alloy is 260 MPa to 300 MPa. According to the method, the high-strength and high-toughness aluminum-lanthanum metal alloy is prepared by fully utilizing waste aluminum blending, the rare earth aluminum alloy with excellent performance can be obtained, and the production cost can be effectively reduced.

The invention provides a mixture for producing calcium carbide and a preparation method of the calcium carbide. The mixture for producing the calcium carbide comprises a calcium-containing raw material, a carbon-containing raw material and auxiliaries, and the auxiliaries comprise calcium fluoride, lanthanum fluoride and calcium molybdate. According to the invention, calcium fluoride is used as a mineralization basis, so that stable crystal lattices of calcium oxide are effectively destroyed; by virtue of efficient segregation of La < 3 + > at a crystal boundary, the introduced lanthanum fluoride is cooperated with calcium fluoride, so that the interface energy and the system melting point between reactants are further remarkably reduced, and the synthesis initial temperature of the calcium carbide is reduced by virtue of the calcium fluoride-lanthanum fluoride synergistic melting reduction effect; the problem that the reaction temperature of a traditional process is too high is fundamentally solved, and the electric energy consumption is greatly reduced.

The machining method is characterized by comprising the following operation steps of pretreatment of the surface layer of a front end shaft, pretreatment of the surface layer of a crank arm, pretreatment of the surface layer of a rear end shaft and overall assembly of the crankshaft. The step of surface layer pretreatment of the front end shaft, the step of surface layer pretreatment of the crank arm and the step of surface layer pretreatment of the rear end shaft respectively comprise an oxynitriding method; a salt bath is adopted in the oxynitriding method, and the formula of the salt bath comprises, by weight, 30%-50% of urea, 20%-40% of potassium nitrate, 10%-30% of sodium carbonate and 5%-15% of lanthanum trifluoride. The surface layers of all parts of the crankshaft are treated, so that the abrasion resistance of the air compressor crankshaft during operation under high strength is improved, and the service life of the air compressor crankshaft during working is prolonged.