160 results about "Niobium oxide" patented technology

The invention relates to a p-type niobium oxide dipole-based metal-oxide-semiconductor device and a manufacturing method thereof, and belongs to the technical field of semiconductor device manufacturing. According to the technical scheme, the MOS device is provided. A gate dielectric stack of the MOS device sequentially comprises an interface layer, a high-k dielectric layer and a p-type electric dipole layer containing niobium oxide from bottom to top. According to the preparation method, the dipole layer is deposited by adopting an atomic layer deposition process, and then atoms in the dipole layer are driven to be diffused to the interface of the high-k dielectric layer and the interface layer through high-temperature rapid annealing treatment so as to form effective electric dipoles. Compared with the prior art, the high dielectric constant characteristic is utilized, the threshold voltage can be positively regulated and controlled to a larger extent, meanwhile, the increase of EOT is remarkably inhibited, and good interface quality is kept.

Provided is a piezoelectric stack including: a substrate having a main surface with a diameter of 3 inches or more; and a piezoelectric film on the substrate, comprising an alkali niobium oxide containing K, Na, Nb, and O, wherein in the piezoelectric film, a composition of K, Na, and Nb satisfies a relationship of 0.94≤(K+Na) / Nb≤1.03 over an entire inner region of the main surface of the piezoelectric film, excluding its periphery.

The invention relates to the technical field of lithium ion batteries, in particular to a nickel cobalt lithium manganate positive electrode material and a preparation method thereof. According to the invention, the technical problems of poor cycle performance and low specific capacity of the existing nickel cobalt lithium manganate positive electrode material are solved. The preparation method comprises the following steps: synthesizing precursor powder by adopting a coprecipitation process; then carrying out high-shear mixing on the precursor, lithium hydroxide, nano niobium oxide and magnesium fluoride; after the mixed material is subjected to pre-oxidation and high-temperature oxygen-enriched gradient sintering, a gradient reduction etching process is adopted in the cooling stage, and strong wind quenching is matched for surface shaping; and finally, carrying out air jet pulverization and demagnetization to obtain the nickel cobalt lithium manganate positive electrode material. According to the method, lattice respiration stress is effectively dissipated by constructing a radial ordered structure, a bulk phase structure is stabilized through multi-element synergistic doping, interfacial ion transport kinetics is optimized through reduction-induced surface oxygen vacancies and a lattice distortion layer, and the synergistic strategy ensures high stability of the material structure and meanwhile, the material structure has a good application prospect. And the de-intercalation efficiency of the active lithium is greatly improved.

Provided are an oxide sintered body mainly containing a molybdenum oxide, a sputtering target containing the sintered body, and an oxide thin film formed by the sintered body. In the present invention, by adding a specific (pseudo) metal oxide in a prescribed range to a molybdenum oxide and a niobium oxide which are difficult to sinter, the sinterability can be improved and high-density characteristics can be ensured even if pressureless sintering is performed.

An anti-reflection film (1) is provided with a transparent base film (2), an anti-reflection layer (3), and an antifouling layer (4) in this order toward one side in the thickness direction. The transparent substrate film (2) is provided with a transparent resin film (21). The anti-reflection layer (3) is an alternating laminate comprising at least one niobium oxide layer (31) and at least one silicon oxide layer (32), and the layer of the anti-reflection layer (3) closest to the antifouling layer (4) is the silicon oxide layer (32). Furthermore, in a difference spectrum calculated from Fourier transform infrared spectrophotometer analysis (FT-IR analysis), when the maximum absorption peak intensity originating from Si-O-Si symmetric scaling near 1050 cm <-1 > is standardized to 1 and the absorption peak intensity originating from Si-O-Si asymmetric scaling at 1200 cm <-1 > is defined as X, 1 / X is 5.0 or more.

The embodiment of the invention discloses a donor-receptor complementary co-doped hafnium oxide-based ferroelectric film material and a preparation method thereof. The method comprises the following steps: according to the composition of the donor-receptor complementary co-doped hafnium oxide-based ceramic target material, mixing raw material powder to obtain mixed raw material powder; calcining the mixed raw material powder under a preset condition; pressing and molding the calcined product into a target material green body; and sintering the target material green body to obtain the donor-receptor complementary co-doped hafnium oxide-based ceramic target material. Wherein the composition of the donor-acceptor complementary co-doped hafnium oxide-based ceramic target material is expressed as AxByHf (1-x-y) O2, A is a donor and comprises elements niobium and tan, and B is an acceptor and comprises elements yttrium and lanthanum; x is more than 0.01 and less than 0.05, and y is more than 0.01 and less than 0.05; the raw material powder containing the donor comprises niobium oxide and tantalum oxide, and the raw material powder containing the acceptor comprises yttrium oxide and lanthanum oxide; and taking the donor-acceptor complementary co-doped hafnium oxide-based ceramic target material as a sputtering target, and obtaining the donor-acceptor complementary co-doped hafnium oxide-based ferroelectric material film by using a pulse laser deposition method.

The invention discloses a preparation method of high-purity Nb2O5, belongs to the field of preparation of Nb2O5, and solves the problem of low purity of Nb2O5 prepared by the existing method. The preparation method comprises the steps that a metal niobium ingot with the purity larger than or equal to 99.999% is adopted, and vacuum drying is conducted after surface peeling, dilute nitric acid ultrasonic cleaning and high-purity water flushing are conducted; the pretreated niobium ingot is subjected to a hydrogenation reaction in a pure hydrogen atmosphere, niobium hydride is generated and then crushed, and niobium hydride powder is obtained; carrying out dehydrogenation treatment on the niobium hydride powder under a high vacuum condition; dissolving the metal niobium powder with electronic-grade hydrofluoric acid, and filtering to obtain fluorine niobic acid filtrate; performing multi-stage counter-current extraction and reverse extraction on the fluobiobic acid filtrate by adopting an extracting agent to obtain fluobiobic acid reverse extraction liquid; introducing high-purity ammonia gas into the fluobiobic acid strip liquor, and precipitating to generate niobium hydroxide; ageing, filtering and washing with high-purity water for multiple times to obtain a niobium hydroxide filter cake; and calcining the niobium hydroxide filter cake in a high-purity oxygen atmosphere in stages to obtain niobium pentoxide. The niobium pentoxide prepared by the method disclosed by the invention is high in purity.

The invention provides a preparation method of ultra-pure niobium pentoxide, which is stable in process and high in efficiency, and aims to reduce the silicon content to be less than 3ppm and obtain ultra-pure niobium pentoxide through the synergistic effect of directional dissolution silicon removal and precision filtration and washing impurity removal.

The invention discloses an oxygen sensor and a preparation method of an oxygen sensor substrate. The oxygen sensor comprises a substrate, the substrate is provided with a zirconium oxide layer, and the zirconium oxide layer comprises Zr, trivalent elements, Nb and Al in terms of elements; the phase of the zirconium oxide layer comprises 96wt%-99.7 wt% of tetragonal phase zirconium oxide, the remaining phase is monoclinic phase zirconium oxide, in the tetragonal phase zirconium oxide, the ratio of the molar content of trivalent element oxide to the total molar content of zirconium oxide, trivalent element oxide and niobium oxide is a, a is equal to 4.5 mol%-5.5 mol%, b is equal to 4.5 mol%-5.5 mol%, and c is equal to 4.5 mol%-5.5 mol%. The ratio of the molar content of niobium oxide to the total molar content of zirconium oxide, trivalent element oxide and niobium oxide is b, and a-b is equal to 4mol%-5mol%; wherein the trivalent elements comprise one or more of Y, Sm, Er, Sc and Nd, and the substrate of the oxygen sensor provided by the invention has relatively good mechanical properties.

A thermal resistance sensor comprising a substrate, a structure bonded to the substrate, and a niobium oxide layer bonded to the structure.

Various embodiments herein relate to electrochromic devices and electrochromic device precursors, as well as methods and apparatus for fabricating such electrochromic devices and electrochromic device precursors. In certain embodiments, the electrochromic device or precursor may include one or more particular materials such as a particular electrochromic material and / or a particular counter electrode material. In various implementations, the electrochromic material includes tungsten molybdenum oxide. In these or other implementation, the counter electrode material may include nickel tungsten oxide, nickel tungsten tantalum oxide, nickel tungsten niobium oxide, nickel tungsten tin oxide, or another material.

The invention belongs to the technical field of plasma thermal spraying, and discloses a preparation method and application of niobium powder for plasma thermal spraying, and the preparation method of the niobium powder comprises the following steps: S1, primary sintering: uniformly mixing niobium oxide and niobium carbide, then carrying out compression molding, and carrying out primary vacuum reduction sintering to obtain hydrogenated primary niobium; the primary sintering is segmented sintering: in the first stage, the sintering temperature is 1100-1200 DEG C; in the second stage, the sintering temperature is 1500-1600 DEG C; in the third stage, the sintering temperature is 1900-2000 DEG C; s2, primary niobium powder is prepared; s3, secondary sintering: firstly, uniformly mixing the primary niobium powder with a forming agent, then carrying out compression molding, and carrying out secondary vacuum sintering at the sintering temperature of 1900-2100 DEG C to obtain hydrogenated secondary niobium; and then, the hydrogenated secondary niobium is sieved and dehydrogenated to obtain niobium powder. The niobium powder preparation method has the advantages of being simple in technological process, high in production efficiency, low in energy consumption, small in pollution and the like, and the prepared niobium powder is uniform in particle size and low in oxygen content and completely meets the use requirement of thermal spraying.

The invention provides a preparation method and application of a monatomic catalyst for preparing 1, 3-propylene glycol through high-selectivity hydrogenolysis of glycerol. The catalyst is composed of active metal, a metal oxide auxiliary agent A and a carrier. The active metal is Pt, and the metal oxide auxiliary agent A is one or two or more of niobium oxide, tantalum oxide, molybdenum oxide and tungsten oxide. The composition and proportion of the monatomic catalyst are accurately regulated and controlled through a strong electrostatic adsorption method, 1, 3-propylene glycol is prepared through efficient catalysis of selective hydrogenolysis of glycerin, the yield of 1, 3-propylene glycol in a high-concentration glycerin solution (50 wt%) reaches up to 0.43 g of 1, 3-propylene glycol g of the catalyst h <-1 >, and excellent stability is achieved. The method has the advantages that the catalyst is simple and convenient to prepare and low in cost, the precious metal atom utilization rate is 100%, recovery is easy, products are easy to separate, and the reaction process is environment-friendly. According to the technical scheme, the invention provides a novel preparation method and application of the monatomic catalyst for preparing 1, 3-propylene glycol through efficient hydrogenolysis of glycerol, and the monatomic catalyst has an excellent application prospect.

Provided are: a negative electrode for an all-solid-state secondary battery, which has a low resistance value; a method for producing the negative electrode; and an all-solid-state secondary battery. The present invention relates to targets 12, 3, 7, 11 of sustainable development targets. The negative electrode for an all-solid-state secondary battery is characterized by comprising a molded body of a negative electrode mixture containing a solid electrolyte and a negative electrode material containing a negative electrode active material, the negative electrode material containing, as the negative electrode active material, a carbon material having, on the surface thereof, a layer containing an oxide having lithium ion conductivity. The carbon material contains at least one of graphite and hard carbon, the oxide contains at least one of lithium niobium oxide, lithium titanium oxide and lithium phosphorus oxide, the amount of the oxide is 1 part by mass or more with respect to 100 parts by mass of the carbon material, and a sulfide-based solid electrolyte is contained as the solid electrolyte. The thickness of the molded body of the negative electrode mixture is 200 [mu] m or more and 3000 [mu] m or less.

The invention discloses an improved potassium ion selective electrode, which relates to the technical field of electrochemical detection and comprises an electrode substrate and a potassium ion sensitive glass film packaged at one end of the substrate, the potassium ion sensitive glass film is prepared from the following components in percentage by mole: 40 to 50 percent of silicon dioxide, 2 to 5 percent of aluminum oxide, 42 to 47 percent of sodium carbonate, 0 to 3 percent of niobium oxide and 2 to 4 percent of alkali metal oxide; by optimizing the components and the preparation process of the glass film, the defects of high volatility and poor stability of a PVC film are overcome, the service life of an electrode is prolonged to 2-3 years, the selectivity and accuracy of potassium ion detection are remarkably improved, the stability range of 48 mV or above can still be kept in the high-concentration sodium ion interference environment, the linear correlation coefficient is larger than or equal to 0.998, and the application prospect is wide. The glass membrane is high in mechanical strength, not prone to falling off and suitable for various scenes such as medical serum detection and environmental water quality monitoring, and more reliable, long-acting and accurate potassium ion measurement is achieved.

A negative electrode according to exemplary embodiments of the present invention comprises: a negative electrode current collector; and a negative electrode active material layer disposed on the negative electrode current collector, wherein the negative electrode active material layer comprises a first area disposed on the negative electrode current collector and including niobium oxide as a negative electrode active material, and a carbon-based material which is a negative electrode active material and is disposed on the first area.

A composition comprising nanosized niobium oxide particles having a D50 of about 100 nm to about 2 μm, wherein the niobium oxide particles have a calculated particle size diameter D in nm:D=6⁢0⁢0⁢0S⁢S⁢A×ρwhere SSA is BET surface area in m2 / g and p is density of 4.6 g / cm3, that is less than about 30% different than the observed particle size diameter measured by SEM. This composition has beneficial properties for catalytic and electronic uses. Processes for making these particles and uses of these particles are further included.

The invention discloses a hybrid capacitor taking a titanium-niobium-oxygen doped porous carbon material as a negative electrode, the hybrid capacitor comprises a positive electrode, the negative electrode, a diaphragm and a lithium salt organic electrolyte, an active material of the positive electrode is coal-based graphitized porous carbon, and an active material of the negative electrode is a titanium-niobium-oxygen in-situ doped porous carbon composite material. The GPC substrate is utilized to construct a three-dimensional conductive network and an ion rapid transmission channel, so that the electronic conductivity and the ion diffusion rate of the niobium-based oxide are remarkably improved, and the inherent dynamic bottleneck of the niobium-based oxide is effectively solved. The GPC / TNO GPC hybrid capacitor constructed by the method realizes a wide voltage window of 0-4 V, has high energy density (up to 170.2 Wh kg <-1 >) and high power density (up to 24 kW kg <-1 >), and has excellent long cycle stability, and a new scheme is provided for developing a next-generation high-performance double-high energy storage device.

The application provides a metal-doped niobium oxide material, which is used as a catalyst to catalyze 1,4-butanediol to prepare tetrahydrofuran. The catalyst preparation method is simple, and the catalyst can be recycled and reused, and is safer and more environmentally friendly compared with a traditional strong acid homogeneous catalyst. In addition, the catalyst has a lower required temperature in a reaction process, a greatly prolonged catalyst service life compared with a traditional strong acid heterogeneous catalyst, and good hydrothermal stability. Therefore, the metal-doped niobium oxide material M@NbO x prepared by the application has certain industrial application prospects.

The application discloses an indium-titanium-cerium-niobium oxide ceramic target material and a preparation method and application thereof, and a transparent conductive oxide film, and realizes uniform complexation and inorganic conversion of a precursor by means of EDTA-glycerol complexation and Fe(III)-citric acid / H2O2 free radical in-situ oxidation system, and high-density, high-strength and low-resistivity target material is prepared by adopting a two-stage atmosphere sintering process. ‑4 The relative density of the obtained target material is greater than or equal to 99.5%, the resistivity is less than or equal to 3.5*10 ‑4 Ω*cm, the square resistance of a sputtered film is less than or equal to 8 Ω / sq, and the transmittance is greater than or equal to 88.3%, and the target material is suitable for preparation of a high-performance photovoltaic transparent conductive layer.

The application discloses a beneficiation-metallurgy combined method for comprehensively recovering niobium, silicon and scandium from niobium-containing tailings, and belongs to the technical field of mineral processing and metallurgical engineering. The application first adopts one roughing and two cleaning flotation to obtain a niobium rough concentrate, and then adopts hydrogen-based mineral phase conversion roasting to activate the niobium rough concentrate, and the roasting product is subjected to acid leaching, so that niobium and scandium enter into a leaching solution, and silicon is enriched in a leaching residue; the leaching solution is subjected to solvent extraction, precipitation and calcination to obtain a niobium oxide product; the leaching residue is subjected to alkali leaching and pH adjustment to obtain white carbon black; and the raffinate is subjected to selective extraction to obtain a scandium oxide concentrate. The preparation method has the advantages of low-temperature hydrogen-based roasting, low carbon and low energy consumption, and can realize the step-by-step recovery of three valuable products, realizes the high-value utilization of all components of the niobium tailings, and has the advantages of mild process conditions, a niobium recovery rate of greater than or equal to 70% in the whole process, a scandium recovery rate of greater than or equal to 60% in the whole process, a white carbon black SiO2 content of greater than or equal to 95%, and good industrial application prospect.

The application discloses a Sm-Mg-based hydrogen storage alloy composite material added with multi-valence niobium oxide and a preparation method thereof. x Mg 100‑x +10wt.% H-Nb2O5, wherein x is an atomic ratio, 1.7<=x<=4.5; the hydrogen storage alloy composite material is prepared by obtaining H-Nb2O5 powder through a hydrothermal method and a reduction method, and then hydrogenating and ball milling the H-Nb2O5 powder and the Sm-Mg-based hydrogen storage alloy; the preparation method is simple, the process is easy to control, the hydrogen storage alloy composite material prepared by the method generates multi-valence catalytic centers in the hydrogen absorption and release process, enhances the weakening effect on Mg-H bonds, generates nanocrystalline MgO at the same time, avoids capacity attenuation caused by Mg-MgO core-shell structure, and finally constructs a double-function Nb / Sm3H7 interface, which improves the kinetic performance of MgH2 and avoids Nb hydrogenation into NbH2; the initial hydrogen release temperature of the composite material is less than 220 DEG C, and the capacity retention rate is greater than 98% after 50 cycles at 325 DEG C.

A process for depositing a metal-niobium oxide film on a substrate using a deposition method may include a plurality of complete deposition cycles. Each complete deposition cycle may comprise performing a metal-oxidizer sub-cycle followed by a niobium sub-cycle. The metal-oxidizer sub-cycle may comprise contacting the substrate with a metal precursor and a first oxygen precursor. The niobium sub-cycle may comprise contacting the substrate with at least a niobium precursor.

The invention discloses a method for measuring sulfur content in asphalt, which belongs to the field of instrument analysis, and comprises the following steps: placing an asphalt sample in a boat-shaped porcelain crucible, pushing the asphalt sample and the carbon-sulfur analyzer with a resistance furnace, detecting the sulfur content by using an infrared absorption method, covering the asphalt sample with a reagent in the boat-shaped porcelain crucible, the sulfur content of the reagent is less than 0.0005%, the reagent comprises zinc oxide, aluminum oxide, magnesium oxide, copper oxide or niobium oxide, or the asphalt and the reagent are coated with a metal foil for testing. The method can promote the release of the sulfur element, is beneficial to preventing the sample from releasing sulfur in advance in the sample injection process, is beneficial to avoiding the problem of integral curve misalignment caused by slow release of sulfur in the later stage, improves the stability and accuracy of the test result, can shorten the test time, has good test repeatability, reliable and accurate results, and has higher test precision.

The invention belongs to the technical field of metallurgy, and particularly relates to a niobium concentrate hydrogen group reduction-step melting separation niobium-iron alloy smelting method which comprises the following steps that S1, niobium concentrate is obtained, hydrogen group reduction is conducted on the niobium concentrate to obtain first niobium ore, and the niobium concentrate comprises, by mass, 30%-50% of TFe, 1%-4% of Nb2O5 and 1.5%-5% of REO; the mass ratio of iron oxide to niobium oxide in the first niobium ore is 100: (20-35); s2, carrying out first melting separation on the first niobium ore to obtain metal iron and second niobium ore; and S3, the second niobium ore and a reducing agent are mixed for second melt separation, and the niobium-iron alloy and rare earth-rich ore are obtained. According to the method, hydrogen-based selective reduction iron and reduction smelting of the ferroniobium alloy are combined, a proper amount of FeO is reserved in the slag by controlling the hydrogen reduction degree, the property of the slag is improved, an endogenous iron source is provided for ferroniobium smelting, and efficient enrichment and separation of iron, niobium and rare earth are achieved.

The application discloses a preparation method of a niobium-doped barium titanate ceramic material with improved flexoelectric performance, and relates to the field of functional materials. The preparation method comprises the following steps: (1) preparing a niobium-doped barium titanate powder by ball-milling and mixing high-purity barium titanate powder and niobium oxide powder and then solid-phase sintering; (2) preparing a to-be-used embryo by using the powder; (3) performing traditional sintering on the to-be-used embryo to obtain a niobium-doped barium titanate ceramic; and (4) performing flexoelectric performance testing on the niobium-doped barium titanate ceramic, wherein the flexoelectric coefficient of the niobium-doped barium titanate ceramic is 23-380 muC / m, and the flexoelectric coefficient of the component with the optimal flexoelectric performance is 20 times higher than that of a pure barium titanate ceramic.

Provided are a semiconductor device, an electronic apparatus including the semiconductor device, and / or a method of manufacturing the semiconductor device. The semiconductor device includes a substrate, an oxide semiconductor layer on the substrate, a first electrode on the oxide semiconductor layer, a second electrode on the oxide semiconductor layer and apart from the first electrode, and a first layer, a second layer, and a third layer in at least one of a region between the oxide semiconductor layer and the first electrode and a region between the oxide semiconductor layer and the second electrode. The second layer includes at least one selected from tantalum oxide, niobium oxide, strontium oxide, and aluminum oxide.

The invention discloses an indium titanium cerium niobium oxide ceramic target material and a preparation method and application thereof, a transparent conductive oxide film realizes uniform complexing and inorganic conversion of a precursor through EDTA-glycerin composite complexing and a Fe (III)-citric acid / H2O2 free radical in-situ oxidation system, and the indium titanium cerium niobium oxide ceramic target material is obtained. And the high-density, high-strength and low-resistivity target material is prepared by adopting a two-stage atmosphere sintering process. The relative density of the obtained target material is larger than or equal to 99.5%, the resistivity is smaller than or equal to 3.5 * 10 <-4 > omega.cm, the sheet resistance of a sputtered film is smaller than or equal to 8 omega.sq, the transmittance is larger than or equal to 88.3%, and the method is suitable for preparing a high-performance photovoltaic transparent conducting layer.

A process of depositing a metal-niobium oxide film on a substrate using a deposition method may include a plurality of complete deposition cycles. Each complete deposition cycle may include performing a metal-oxidant sub-cycle and then performing a niobium sub-cycle. The metal-oxidant sub-cycle may include contacting the substrate with a metal precursor and a first oxygen precursor. The niobium subcycling may include contacting the substrate with at least a niobium precursor.

The method for producing the niobium-nickel intermediate alloy from the niobium-aluminum recycled materials comprises the following steps that materials are prepared, specifically, the niobium-aluminum recycled materials, nickel protoxide, calcium oxide, calcium fluoride and a heat generating agent are prepared according to the mass ratio of 1: (0.4-0.8): (0.01-0.05): (0.01-0.07): (0.1-0.4) and mixed to be uniform; treating the raw materials: drying the mixed materials at 100 DEG C to remove moisture; charging into a furnace; filling the mixed material into a reaction furnace body, compacting, and then spreading an ignition agent on the material for ignition to carry out aluminothermic reaction; according to the method, the niobium element in the niobium-aluminum recycled material is reduced through an aluminothermic reduction method, meanwhile, nickel protoxide is added in the reaction process, the nickel element is prepared, and a reducing agent is aluminum in the recycling rate; the one-step reduction reaction is adopted, independent niobium oxide does not need to be adopted while the niobium-nickel intermediate alloy is prepared, and recycling of useful elements in recycled materials is improved.