833 results about "Niobium" patented technology

The invention relates to the technical field of multi-source information analysis, in particular to a niobium-tantalum metal ore metallogenic evaluation system based on multi-source information analysis, which comprises a geologic structure association module, a mineral distribution interpretation module, a metallogenic environment adaptation module, a spatial feature analysis module and a potential region judgment module. According to the method, by introducing a multi-source data analysis and fusion method, the evaluation precision and comprehensive capability of resource exploration are effectively improved, analysis after information fusion is combined with relevance and spatial modes of different data types, it is ensured that mineralization potential evaluation is more accurate, the limitation of a single data source and manual analysis is overcome, and the method is suitable for popularization and application. According to the method, the identification precision and reliability of the mineralization law are improved, the potential area can be identified more accurately, resource potential analysis is optimized in combination with the adaptability of the mineralization environment, the efficiency and accuracy of determining the mineralization area are remarkably improved, the problems of information isolation and analysis deviation in a traditional method are avoided, and the scientificity and the practical application value of the exploration process are enhanced.

The invention relates to the technical field of hafnium tetrachloride preparation, in particular to a process method for preparing low-niobium-content hafnium tetrachloride based on a hydrogen reduction method, which comprises the following steps: S1, raw material processing, S2, chlorination and impurity removal, S3, purification, S4, refining and S5, material receiving. According to the method, metal impurities in the hafnium-containing raw stone are removed step by step through the working procedures of raw material processing, chlorination and impurity removal, purification, refining and material receiving, high-purity hafnium tetrachloride with the low niobium content is obtained, in the refining working procedure, under the assistance of the supported catalyst, the metal niobium impurities are removed through a hydrogen reduction method, the removal rate is effectively increased, and the production cost is reduced. And moreover, the process flow is simplified, the energy consumption is reduced, and the method meets the environmental protection requirement.

The invention provides a surface-modified sulfide electrolyte and a preparation method thereof, and an all-solid-state battery, the surface-modified sulfide electrolyte comprises a sulfide electrolyte and a modification layer coated on the surface of the sulfide electrolyte, the chemical general formula of the modification layer is LiaMbNcXd, 0 < = a < = 3, 0 < = b < = 1, 0 < = c < = 1, 0 < = d < = 6, and 0 < = c < = 1. M is at least one element of magnesium, aluminum, calcium, iron, zirconium, niobium, tantalum, tungsten, gadolinium, yttrium, indium, hafnium, lanthanum and ytterbium, and X is at least one element of oxygen, sulfur, fluorine, chlorine, bromine and iodine. According to the surface-modified sulfide electrolyte, the modification layer with high ionic conductivity and high oxidation potential is coated outside the sulfide electrolyte, so that when the surface-modified sulfide electrolyte is applied to a positive electrode of an all-solid-state battery, the modification layer can improve the oxidation potential of the electrolyte on the premise of not reducing the ionic conductivity of the electrolyte; the effects of improving the interface stability between the positive electrode active material and the sulfide electrolyte and further improving the cycle performance of the battery are achieved.

The invention relates to the technical field of flux-cored wires. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 4-6 parts of chromium carbide powder, 7-9 parts of molybdenum powder, 6-8 parts of nickel powder, 10-15 parts of niobium powder, 15-18 parts of tungsten carbide powder, 7-11 parts of a modified titanium carbide agent, 5-8 parts of a blending agent added based on boron and 2-4 parts of 30-mesh natural graphite; 1-2 parts of sodium fluosilicate; 1-2 parts of aluminum powder; and 70-75 parts of iron powder. The flux-cored wire can adapt to complex service environments of parts such as rollers and continuous casting crystallizers in the metallurgical industry, the service life of the parts subjected to surfacing repair is prolonged, the production efficiency of the parts subjected to surfacing repair is improved, the obtained flux-cored wire achieves balance of high-temperature performance, mechanical performance and low-temperature stability, and the comprehensive applicability of products is improved.

The invention discloses an annular furnace heat-resistant supporting forged chassis and an additive manufacturing process and a fixing device thereof, and belongs to the technical field of plating of metal materials, and the annular furnace heat-resistant supporting forged chassis comprises the steps that heat-resistant alloy steel base metal with specific components is prepared; carrying out laser texturing and nickel-based alloy bottom layer pretreatment on the surface of the steel plate; performing laser cladding on high-silicon high-temperature alloy powder containing niobium and rare earth elements to form a functional cladding layer, and performing gradient cladding on the edge of the atmosphere guide hole; and finally, carrying out heat treatment and assembling with a fan-shaped refractory brick fixing device. A composite oxide film and a multi-scale strengthening system are constructed, hydrogen resistance and brittleness resistance are effectively achieved, interface thermal stress is relieved, cracking and stripping of a cladding layer are avoided, a fixing device adapts to thermal expansion, the atmosphere is dredged, and the annealing uniformity of a steel coil is improved; the problems of creep deformation, hydrogen embrittlement, cladding layer stripping and thermal stress cracking of a traditional supporting component under the conditions of high temperature, heavy load and nitrogen and hydrogen atmosphere are solved.

The invention discloses a preparation method of niobium-tungsten alloy spherical powder and a 3D printing method of the niobium-tungsten alloy spherical powder, and belongs to the technical field of refractory metal material preparation.The preparation method comprises the steps that niobium, tungsten, molybdenum and zirconium refractory metal raw materials are smelted to obtain cast ingots with uniform components, and hydride powder is formed after hydrotreating and mechanical crushing; spherical powder is prepared by adopting a plasma spheroidizing technology, then dehydrogenation is performed for 1-3 hours at the temperature of 450-750 DEG C, magnesium powder is added, treatment is performed for 2-5 hours in an inert atmosphere at the temperature of 800-1100 DEG C, and finally the low-oxygen niobium-tungsten alloy spherical powder with the oxygen content lower than 120 ppm is obtained. Compared with a traditional process, the spheroidizing treatment is innovatively carried out before the dehydrogenation and oxygen reduction process, the deoxidation efficiency is improved through the relatively small specific surface area of spherical powder, and oxygen content control is achieved in combination with magnesium powder heat treatment. The problems of high oxygen content and low powder yield in a traditional process are solved, and material support is provided for high-performance niobium-tungsten alloy components in the fields of aerospace, nuclear power and the like.

The invention discloses high-strength high-temperature-resistant fireproof industrial glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The industrial glass is prepared from the following raw materials: silicon dioxide, boric oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, a composite reinforcing component and a clarifying agent, the composite reinforcing component is prepared from hafnium oxide, gadolinium oxide and zinc oxide; the clarifying agent is obtained by mixing cerium dioxide and tin oxide. The preparation method of the industrial glass comprises the following steps: preparing functional components, melting glass, forming a glass substrate, and preparing the industrial glass. The prepared industrial glass is high in strength, good in high-temperature stability and excellent in fireproof performance.

The invention discloses a deep niobium phosphate ore positioning physical and chemical exploration method based on multi-method cooperation, and belongs to the technical field of geological mineral exploration. According to the method, a three-stage exploration system of region optimization, target region delineation and fine verification is constructed, multi-parameter cooperation of a magnetic method, an electromagnetic method, an induced polarization method, a three-component magnetic logging method and a geochemical method is combined, and each step is constrained by a basic rock-niobium phosphorite metallogenic model. An ore prospecting mark is determined through regional geological background analysis and metallogenic model construction, a metallogenic prospective region is delineated through regional optimization, a specific target region is delineated and locked, engineering verification is carried out through fine verification, and finally, a result is integrated to estimate the resource quantity. According to the method, the multiplicity of solutions of a single method is effectively reduced, the positioning precision of the deep niobium phosphorite is improved, the exploration efficiency and the target area ore finding rate are improved, and the method is suitable for accurate exploration of the deep niobium phosphorite.

The invention belongs to the technical field of rhenium alloy materials, and particularly relates to a high-strength rhenium alloy material and a preparation method thereof. The rhenium alloy material is prepared from the following raw materials in percentage by mass: 12 to 24 weight percent of molybdenum, 6 to 9 weight percent of niobium, 2 to 5 weight percent of cobalt, 1 to 3 weight percent of tungsten, 0.5 to 1.2 weight percent of modified tantalum carbide, 3 to 6 weight percent of high-entropy rare earth and the balance of rhenium and other inevitable impurities. The modified tantalum carbide is prepared by the following preparation process: adding tantalum chloride, zirconium oxychloride and phenolic resin into a mixed solution of acetylacetone and n-butyl alcohol, stirring for 1-2 hours under a heating condition, dropwise adding ammonia water, continuously stirring for 0.5-1 hour, and drying to obtain a precursor; calcining the precursor, and cooling to obtain the modified tantalum carbide. The rhenium alloy prepared through the method has high hardness, good bending strength and excellent high-temperature mechanical property.

A preparation method for high-nitrogen austenitic stainless steel. The high-nitrogen austenitic stainless steel comprises the following chemical components in percentages by weight: carbon: ≤0.02%; silicon: 0.4-0.8%; manganese: 10.2-12.5%; chromium: 24.5-26.5%; nickel: 13.5-16.5%; molybdenum: 3.2-4.8%; nitrogen: 0.75-0.95%; phosphorus: ≤0.03%; sulfur: ≤0.0025%; vanadium: 0.016-0.022%; niobium: 0.026-0.034%; copper: 0.2-0.35%; aluminum: 0.01-0.02%; cerium: 0.015-0.025%; and the balance of iron and inevitable impurities. The preparation method comprises the steps of raw material charging, vacuum melting, refining, nitrogen-added alloying, deoxidation and desulfurization, casting, electroslag remelting, and secondary casting. The preparation is implemented by using the processes of smelting in a pressurized induction furnace and electroslag remelting under a protective atmosphere; and nitrogen is added by using a method in which a nitrogen alloy and pressurized nitrogen permeation are combined.

The invention belongs to the technical field of geological sample analysis and detection, and particularly discloses a method for measuring the amount of each element of lithium ore in a closed acid-soluble system, and the method comprises the following steps: pretreating the lithium ore; the pretreated lithium ore is weighed and put into a closed sample dissolving device, hydrofluoric acid and purified nitric acid are sequentially added, and the closed sample dissolving device is closed; carrying out heat preservation on the closed sample dissolving device twice to obtain a test solution; and measuring the test solution by using an inductively coupled plasma mass spectrometer to obtain a working curve, and calculating the content of the analysis element in the sample solution by using the working curve. The method for determining the amount of each element in the lithium ore by adopting the closed acid-soluble system has the characteristics of simplicity in operation, high efficiency and good stability, realizes simultaneous determination of the amount of lithium, rubidium, cesium, beryllium, strontium, niobium, tantalum, zirconium, hafnium and rare earth elements in the large-batch lithium ore, and further provides a reference for determination of main trace elements in the lithium ore.

The invention discloses high-performance bridge steel and a production method thereof, and belongs to the technical field of ferrous metallurgy. The bridge steel comprises the following chemical components in percentage by mass: 0.09%-0.11% of carbon; silicon: less than or equal to 0.55%; 1.4%-1.6% of manganese; less than or equal to 0.018% of phosphorus; sulfur: < = 0.005%; 0.15% to 0.20% of niobium; less than or equal to 0.08% of vanadium; 0.006% to 0.03% of titanium; 0.01 to 0.02 percent of chromium; 0.01% or less of nickel; less than or equal to 0.3% of copper; 0.01% to 0.045% of aluminum; less than or equal to 0.3% of molybdenum; not more than 0.008% of nitrogen; and the balance of iron and inevitable impurities. According to the high-performance bridge steel and the production method thereof, by optimizing the component design and the production process, production of the bridge steel with high strength, low yield ratio, high toughness and good welding performance can be achieved.

The invention relates to the field of nitrogen oxide treatment, and particularly provides preparation and application of a Fe-Mn / NbOPO4 catalyst for improving water resistance and sulfur resistance of NH3-SCR (selective catalytic reduction) reaction. The preparation method comprises the following steps: 1, preparation of an NbOPO4 carrier: mixing and stirring a niobium source and a phosphorus source, dropwise adding ammonia water, filtering and washing to obtain a precipitate, further adding a CTAB / H2O solution, adjusting the pH value with H3PO4, carrying out hydrothermal aging in a reaction kettle, and finally filtering, washing, drying and calcining; and 2, loading Fe and Mn active components, dissolving an iron source and a manganese source in water by adopting a wet impregnation method, adding the NbOPO4 carrier, stirring, carrying out rotary evaporation, drying and calcining. When the air speed is 60000mL. G <-1 >. H <-1 >, the NOx conversion rate in the temperature range of 75-297 DEG C reaches 90% or above, and in a water-resistant and sulfur-resistant performance test of 5vol.% H2O and 100ppm SO2, the reaction activity is almost not obviously reduced. The SCR reaction temperature window of the manganese-based catalyst is widened, the water resistance and sulfur resistance of the manganese-based catalyst are effectively improved, and the manganese-based catalyst has wide application prospects.

The invention provides a method for recovering fluorine in tailings containing fluorine, tantalum and niobium. The recovery method comprises the following steps: mixing and leaching the fluorine-containing tantalum-niobium ore tailings and a sulfuric acid solution, and carrying out solid-liquid separation to obtain a leachate; mixing and reacting a reducing agent with the leaching solution to reduce iron ions in the leaching solution into ferrous ions, so as to obtain an extraction material solution; mixing the extraction feed liquid with an organic phase, carrying out extraction treatment, and carrying out phase splitting to obtain a fluorine-containing extraction liquid; the organic phase comprises trioctylamine, an additive and a diluent; and mixing the fluorine-containing extraction liquid with an alkali solution, carrying out reverse extraction treatment, and carrying out phase splitting to obtain a fluorine-containing reverse extraction liquid and a no-load organic phase.

The invention discloses a high-temperature-resistant titanium alloy and a preparation method thereof. The high-temperature-resistant titanium alloy comprises, by mass, 5.5%-6% of aluminum, 3.5%-4.2% of tin, 3.8%-4.5% of zirconium, 0.2%-0.4% of molybdenum, 0.8%-1.2% of tungsten, 0.2%-0.4% of niobium, 0.25%-0.4% of silicon, 0.4%-0.55% of manganese, 0.2%-0.5% of silicon carbide, 0.03%-0.06% of carbon and the balance titanium and inevitable impurities. The titanium alloy disclosed by the invention is excellent in room-temperature and high-temperature strength, relatively high in thermal stability, creep resistance and oxidation resistance and relatively high in high-temperature resistance, the room-temperature tensile strength is greater than 1100MPa, the high-temperature tensile strength at the temperature of 650 DEG C is greater than 650MPa, and the high-temperature tensile strength at the temperature of 750 DEG C is greater than 450MPa.

The invention discloses a quaternary ferrocolumbium cobalt sulfide crystal, a preparation method and application, and belongs to the technical field of magnetic materials, the quaternary ferrocolumbium cobalt sulfide crystal has remarkable in-plane and out-of-plane magnetic anisotropy, and the chemical general formula of the quaternary ferrocolumbium cobalt sulfide crystal is Nb3 (Fe, Co) S6; the preparation method comprises the following steps: (1) preparing and packaging raw materials; (2) vacuum packaging; (3) carrying out CVT reaction; and (4) cooling and sampling. An improved double-temperature-zone chemical vapor transport (CVT) method is adopted, and a proper transport agent is selected, so that a multi-component raw material can be transported and recrystallized in a gaseous form at a relatively low temperature, and a single crystal with uniform components and a complete structure is obtained. The material can be applied to spintronics devices, high-density magnetic storage units and magnetic sensors; and a new platform is provided for researching complex magnetic interaction, magnetic anisotropy sources, potential superconductivity, topological properties and the like.

The invention discloses a ductile niobium-titanium alloy material, a preparation method and application of the ductile niobium-titanium alloy material to preparation of a central conductor. The ductile niobium-titanium alloy material comprises, by weight, 44.5%-47.5% of Nb, 47.0%-50.0% of Ti, 1.0%-2.0% of Zr, 0.8%-2.0% of Mo, 0.2%-0.6% of V, 0.1%-0.3% of Al, 0.05%-0.12% of Si, 0.015%-0.025% of C, smaller than or equal to 0.035% of O, smaller than or equal to 0.01% of N, smaller than or equal to 0.25% of Fe + impurities and the balance Ti. The preparation process comprises the steps of double-vacuum melting, double-stage pre-homogenization heat treatment, gradient temperature control thermal machining and double-stage aging heat treatment, a fine grain beta matrix + dispersed alpha phase + nano MC carbide synergistic strengthening structure is obtained, and 3-10% of metastable beta phase is reserved. The central conductor made of the material has longitudinal and transverse absorption energy of not less than 180 J / cm and not less than 178 J / cm at-273 DEG C, longitudinal and transverse performance difference of not more than 8%, yield strength of not less than 780 MPa, salt spray corrosion resistance of not less than 1000 hours, and no obvious corrosion, and is suitable for manufacturing the central conductor of the low-temperature superconducting wire.

Molding core for manufacturing an OMC hollow aeronautical part, in particular a fan module part, including a composite material including on the one hand a first phase of formula Mn+1AlCn, where n=1 to 3, and M being a transition metal selected from the group consisting of titanium, niobium, chromium or zirconium, the composite material including on the other hand a second phase of formula Al4C3.

The invention relates to the technical field of mineral separation, in particular to separation equipment and a separation process for micro-fine particle low-grade tantalum-niobium ore, the separation equipment comprises an outer barrel, and a vibration barrel, a rotating barrel and a fixed barrel are sequentially arranged in an inner cavity of the outer barrel from the edge to the center; an annular partition plate is arranged on the upper portion of an inner cavity of the vibration cylinder, and a gap is reserved between the annular partition plate and the vibration cylinder. A wedge-shaped block is fixed at the bottom of the rotating cylinder; a spiral blade is fixed on the surface of the connecting shaft sleeve; circulating holes are formed in the upper end of the inner wall of the fixed cylinder; the device has the beneficial effects that the fixed cylinder which is kept fixed is arranged in the inner cavity of the rotating cylinder, when the rotating cylinder rotates, mineral aggregates rotate between the rotating cylinder and the fixed cylinder, crushing teeth can crush the mineral aggregates, crushed ore pulp can penetrate through filtering holes, and the device can crush the mineral aggregates and conduct centrifugal ore dressing on the ore pulp at the same time; and the mineral separation efficiency is prevented from being influenced by mutual adhesion and wrapping of mineral aggregates.

The invention relates to a polycrystalline cubic boron nitride coated cutting tool and a preparation method and application thereof.The polycrystalline cubic boron nitride coated cutting tool comprises a PCBN base body and a first coating formed on the PCBN base body, the PCBN base body is at least provided with a polycrystalline layer, the polycrystalline layer comprises cubic boron nitride, a first binder and a second binder, and the first coating is formed on the PCBN base body. The second binder is selected from a mixture of one or more of aluminum, titanium, cobalt, nickel, tungsten, niobium, tantalum and zirconium, and the ratio of the average particle size of the cubic boron nitride to the average thickness of the first coating is 0.5-2.5. The thermal expansion coefficient of the PCBN polycrystalline layer is matched with the thermal expansion coefficient of the coating by regulating and controlling the formula of the PCBN substrate (the type and proportion of the binder) and the formula of the coating, and the thermal stress between interfaces during cutting is reduced; and by regulating and controlling the thickness of the cubic boron nitride and the coating, the deposition nucleation of the coating is compact, and the hardness of the coating is matched with that of a polycrystalline layer.

Cast alloys comprising 20 to 35 wt. % nickel; 25% to 42.5 wt. % chromium; 1.5 to 2.5 wt. % carbon; 0.5 to 2.0 wt. % manganese; 0.25 to 2.0 wt. % silicon; 0 to 1.5 wt. % aluminum; 0 to 0.5 wt. % titanium, niobium, tantalum combined, 0 to 1 wt. % copper, other residual elements up to 0.5 wt. %, and iron to bring the total percentage to 100 wt. %, are described. The cast alloys can be used to form components for mixers, turbines and pumps, such as impellers, diffusers, and spacers, or for fracking operations as seats or flow diverters, as well as other oil and gas or energy industry components. In some applications, the cast alloys are custom made for downhole electro submersible pump applications.

The invention relates to the technical field of material surface engineering and metallurgical equipment, in particular to a composite coating for prolonging the service life of a crystallizer copper plate and a plasma spraying preparation method thereof.The composite coating comprises, by mass, 35%-55% of chromium, 20%-55% of nickel, 5%-10% of titanium diboride, 0.1%-0.3% of niobium and the balance chromium carbide and inevitable trace impurity elements. According to the invention, titanium diboride and chromium carbide are used as main hard reinforcing phases, so that the coating shows excellent wear resistance at normal temperature and high temperature; a hollow graphite electrode is adopted in the spraying process, plasma arc is generated, and meanwhile an ablation product (carbon) provides a carbon source for formation of chromium carbide; the titanium powder and the boron powder are subjected to an in-situ reaction in a plasma arc to generate titanium diboride, and the in-situ synthesis technology enables hard phase particles to be fine and uniformly distributed, and forms a firm interface with a metal binding phase, so that the problems of interface pollution and weak combination caused by the addition of the hard phase are avoided.

A non-oriented electrical steel sheet having a composition of the following elements, expressed in percentage by weight 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.25%, 2.9%≤Silicon≤3.4%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5%, and the following optional elements 0%≤Niobium≤0.1%, 0%≤Titanium≤0.1%, 0%≤Vanadium≤0.1%, 0%≤Chromium≤1%, 0%≤Molybdenum≤0.5%, 0%≤Tungsten≤0.1%, 0%≤Cobalt≤1%, 0%≤Arsenic≤0.05%, 0.001%≤Calcium≤0.01%, 0%≤Copper≤1%, 0%≤Nickel≤1%, 0%≤Boron≤0.05%, 0%≤Lead≤0.2%, 0%≤Tin≤0.2%, 0%≤Antimony≤0.2%, the remainder composition being composed of iron and unavoidable impurities caused by processing. The microstructure is made of ferrite and including in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses less than 25% and simultaneously having a magnetic polarization at 5000 A / m from 1.625 T to 1.690 T.

The application discloses a beneficiation method for comprehensively recovering niobium, rare earth and pyrite from low-grade niobium ore, and comprises the following steps: (1) grinding: grinding the niobium ore after crushing to a fineness of 85% to 87% of 0.038 mm, and then adjusting the ore pulp concentration to 25% to 30%; (2) pre-concentration by strong magnetic separation; (3) re-concentration of the rough magnetic separation concentrate by gravity separation; (4) re-separation of the middling concentrate; and (5) flotation separation of the gravity separation concentrate: combining the gravity separation concentrate 1 in the step (3) and the gravity separation concentrate 2 in the step (4) to obtain a gravity separation concentrate, wherein the gravity separation concentrate is a mixed concentrate rich in niobite, rare earth and pyrite; and after the gravity separation concentrate is adjusted into an ore pulp with a concentration of 25% to 35%, the ore pulp is subjected to flotation separation. The application is aimed at the multi-metal low-grade niobium ore with niobite, rare earth and pyrite being associated, realizes efficient separation among the niobium ore, the rare earth ore, the pyrite ore and the gangue ore, and achieves the purpose of comprehensively recovering the niobite, the rare earth and the pyrite.

The invention relates to a brazing method for an aluminum oxide ceramic / niobium metal high-temperature-resistant structural member, which is characterized by comprising the following steps of: 1, plating nickel on a tungsten metallization layer of aluminum oxide ceramic; and secondly, vacuum brazing is conducted on the aluminum oxide ceramic and niobium metal through the AuNi 17.5 / tungsten net / AuNi 17.5 composite brazing filler metal. According to the method, a layer of nickel metal is electroplated on the tungsten metallization layer, spreading of the brazing filler metal is facilitated, the tungsten metallization density can be increased, and the wettability of the brazing filler metal on an interface can be improved. And by adopting the gold-nickel brazing filler metal, the welding seam forming quality and the temperature resistance of the joint can be improved.

The utility model discloses a code disc for a reflective encoder, which relates to the technical field of encoder equipment and comprises a glass code disc, a low-reflection film is fixedly connected to the surface of the glass code disc, and a high-reflection film is fixedly connected to one side, far away from the glass code disc, of the low-reflection film. The low-reflection film is formed by plating acid-resistant alkali metal and metal oxide through a vacuum coating machine, the acid-resistant alkali metal comprises niobium, molybdenum, tantalum and hafnium, one of the niobium, the molybdenum, the tantalum and the hafnium is short for H, the metal oxide comprises sio2, sio, al2o3 and zro2, one of the sio, the al2o3 and the zro2 is short for L, and the plating sequence of the acid-resistant alkali metal and the metal oxide is LHLHLHLHLHL, and after the thickness of each layer of the acid-resistant alkali metal and the metal oxide is optimized, the thickness range is 10-150nm, so that the problems that the performance of a traditional material cannot reach an ideal level and the overall effect and the accuracy of equipment are reduced when the traditional glass code disc is in a working environment under high-intensity light or in a scene requiring high reflectivity are solved.

The invention discloses a design method of an anti-corrosion and wear-resistant reinforced sucker rod, and relates to the technical field of oil exploitation equipment. According to the method, chemical components of the sucker rod are optimized, alloy elements such as chromium, nickel and molybdenum and microalloy elements such as niobium, titanium and vanadium are added, meanwhile, the surface treatment processes of boriding, nickel-phosphorus alloy plating and polyurethane elastomer coating are adopted, all links of the manufacturing process are optimized, and the manufacturing process is optimized. The corrosion resistance, the wear resistance and the comprehensive mechanical property of the sucker rod are obviously improved. Tests prove that the sucker rod adopting the design method can effectively deal with a complex and severe underground environment, the service life is prolonged, the oil extraction operation cost of an oil field is reduced, and the sucker rod has a wide application prospect.

The invention belongs to the technical field of auxiliary preparation, and provides a curing material applied to a flameless combustion process of copper-containing sludge and a preparation method. The preparation method comprises the following steps: firstly, mixing iron nitrate nonahydrate, ferrous sulfate heptahydrate, a manganous nitrate solution and citric acid to prepare a ferrite precursor; further, a rare earth phosphate nano dispersion is synthesized through a hydrothermal method, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate are used as rare earth sources, and ammonium dihydrogen phosphate and ammonium fluoride are introduced to provide phosphate radicals and fluorine ions; meanwhile, multi-element co-doped amorphous powder is prepared through a sol-gel method, tetraethoxysilane serves as a silicon source, zirconium oxychloride octahydrate, tetra-n-butyl titanate and niobium pentachloride are supplemented, a thermally stable amorphous oxide matrix is formed under high-temperature heat treatment, and the high-temperature mechanical property is provided; and finally, mixing kaolin or bentonite mineral powder with the synthesized ferrite precursor, the rare earth phosphate nano dispersion, the multi-element amorphous powder and other auxiliaries to form slurry, and drying to form the curing material.

The application discloses a potassium fluorotantalate crystallization purification method, and relates to the technical field of tantalum hydrometallurgy and fluorotantalate crystallization purification. The method comprises the following steps: filtering a tantalum-containing fluorine acid solution, adding a potassium source and a tantalum-niobium separation type composite crystallization regulator, stirring and complexing, seed induction, controlled cooling crystallization, graded removal of the regulator, solid-liquid separation, and potassium fluoride containing fluorine acid washing to obtain primary purified potassium fluorotantalate crystals, and then redissolving the primary purified potassium fluorotantalate crystals in a fluorine-containing acid solution, correcting the K / Ta molar ratio, repeatedly regulating and crystallizing, graded removal of the regulator, washing, and drying to obtain high-purity potassium fluorotantalate. The regulator can reduce the entrainment of niobium impurities and reduce the residual amount of the regulator itself, thereby improving the purity of the product and the Ta yield.

A protective layer includes a base layer, a first high refractive layer on the base layer and including titanium and niobium, a first low refractive layer on the first high refractive layer and including silicon and aluminum, a second high refractive layer on the first low refractive layer and including a material that is the same as that included in the first high refractive layer, a second low refractive layer on the second high refractive layer and including a material that is the same as that included in the first low refractive layer, and an anti-fingerprint layer on the second low refractive layer and including a perfluorinated compound.