143 results about "Niobium pentoxide" patented technology

The invention relates to a method for preparing a pyrochlore oxyfluoride solid electrolyte by a one-step solid phase method, which comprises the following steps: uniformly mixing lithium carbonate (Li2CO3), lanthanum oxide (La2O3), niobium pentoxide (Nb2O5) and lithium fluoride (LiF), and carrying out high-temperature one-time sintering under protective gas to synthesize a Li2-xLa (1 + x) / 3Nb2O6F (LLNOF solid electrolyte material. The synthesis route is optimized, a single fluorine source is used, and the types of raw materials are reduced; according to the method, secondary sintering is not needed, the pure-phase electrolyte powder can be obtained by adopting one-step sintering synthesis, the steps are simple, the efficiency is high, the cost is reduced, and the resource consumption is reduced. According to the obtained LLNOF electrolyte material powder, the synthesis temperature ranges from 900 DEG C to 1100 DEG C, heating to 1100 DEG C or above is not needed, the requirement for heating equipment is low, large-scale mass production can be conducted, the sample yield is large, and energy consumption is low. Required synthesis equipment is simple and easy to obtain, and the ionic conductivity is good. The lithium ion conductor with high conductivity and stability in air is synthesized through a one-step method.

The present disclosure relates to embodiments of a method for manufacturing a ceramic material comprising the steps of (a) homogenizing aluminum oxide, niobium pentoxide and solvent; (b) ultrasonicating the blend obtained in step (a); (c) adding an aliquot of the prepared suspension to the empty cavity of a mold, particularly between the polymeric mold and the metal mold; (d) immersing the mold into a coolant liquid-containing bath for sufficient time to ensure that all parts are completely frozen; (e) removing the ceramic body from the mold; (f) removing the solidified phase by means of sublimation hence obtaining a green tube; and (g) sintering the green tube, so as to obtain a solid structure. The present disclosure further relates to embodiments of a ceramic material and its use to manufacture a microfiltration membrane and / or a membrane support for fluid separation.

The invention relates to the technical field of piezoelectric light-transmitting functional ceramics, and discloses a high-light-transmitting ceramic material and a preparation method thereof.The preparation method comprises the following preparation steps that sodium carbonate, potassium carbonate, niobium pentoxide, antimony trioxide, samarium oxide and zirconium dioxide powder raw materials are taken, and after primary ball milling and drying are conducted on the powder raw materials, mixed powder is obtained; carrying out pre-sintering and secondary ball milling on the mixed powder, carrying out compression molding to form a tablet, and sintering and polishing the tablet to obtain a ceramic matrix; and spraying the composite slurry to the surface of a ceramic matrix, carrying out heat treatment, and cooling to room temperature to obtain the high-transmittance ceramic material. The antimony trioxide, the samarium oxide and the zirconium dioxide are co-doped, an antimony-samarium-zirconium liquid phase is generated in the ceramic material, pores of the ceramic material are filled and eliminated, and the prepared ceramic material has excellent optical transmittance, piezoelectric property and mechanical strength.

The invention relates to the technical field of secondary batteries, provides a secondary battery and a preparation method thereof, an energy storage system and electric equipment, and at least facilitates the improvement of the use stability of the secondary battery. The method comprises the following steps: preparing a diaphragm: preparing a substrate layer which is made of polyimide and niobium pentoxide and has a fiber network structure; a self-repairing layer is prepared, the self-repairing layer is located on the surface of one side of the substrate layer, the material of the self-repairing layer comprises polyurethane containing dynamic disulfide bonds, and the surface, away from the substrate layer, of the self-repairing layer is grafted with-SO3Li groups; a positive plate and a negative plate are provided, the positive plate, the diaphragm and the negative plate are subjected to winding treatment or lamination treatment and then put into the shell, the self-repairing layer faces the negative plate, the substrate layer faces the positive plate, and electrolyte is injected into the shell to obtain the secondary battery.

The invention belongs to the technical field of metal preparation, and particularly relates to a Fe-Al-Nb alloy and a preparation method thereof. Comprising the following steps: mixing ferric oxide, niobium pentoxide powder and a metal diluent, performing ball milling, and pressing into a green body; and the blank is put into a reaction kettle, then an ignition agent is added, protective gas is inflated, a self-propagating reaction is conducted at the temperature of 260-300 DEG C, and the Fe-Al-Nb alloy is obtained. The Fe-Al-Nb alloy is prepared through the self-propagating reaction, the reaction temperature is reduced, the thermal stress during forming is improved, the temperature of the self-propagating reaction is only 260-300 DEG C, meanwhile, the self-propagating reaction mode is adopted, the alloy is rapidly cooled after reacting, the fine grain strengthening effect is promoted to be more obvious, a microstructure of a Fe3Al matrix phase and a C14 Laves reinforced phase is formed, and the Fe-Al-Nb alloy is obtained. And the distribution of a reinforced phase is more uniform, and the wear resistance of the material is improved.

The invention discloses a compact anti-cracking fused zirconia corundum brick and a preparation method thereof, and belongs to the technical field of refractory materials, the compact anti-cracking fused zirconia corundum brick comprises the following raw materials by mass fraction: 42.7-46.6% of alumina, 36.8-40.5% of zirconium dioxide, 11.5-14.2% of silicon dioxide, 2.5-4.4% of niobium pentoxide, 0.7-1.1% of soda ash, 0.6-1% of manganese dioxide and 0.5-1% of copper oxide, the preparation method comprises the following steps: mixing and melting the raw materials, introducing oxygen to remove carbon, casting and molding molten feed liquid, and annealing and cooling. The fused zirconia corundum brick has excellent compactness and crack resistance, and the service life of the fused zirconia corundum brick is greatly prolonged.

The invention belongs to the technical field of target material production, and discloses a ZMO target material which is prepared from zinc oxide, magnesium oxide and doped metal oxide. Wherein the doped metal oxide is selected from at least one of tantalum pentoxide, cerium dioxide, titanium dioxide, niobium pentoxide, manganese sesquioxide and chromium sesquioxide, the mass ratio of metal elements in zinc oxide to metal elements in magnesium oxide is (73-91): (9-27), and meanwhile, the metal elements in the doped metal oxide account for 1000-10000 ppm of the total mass of the metal elements in the target material. Through the design, on one hand, the relative density of the target material is improved, and on the other hand, higher carrier concentration or more excellent carrier migration capability is provided for the target material by doping the metal oxide, so that the resistivity of the target material is reduced; in addition, the invention also discloses a preparation method of the ZMO target material.

The invention discloses an oxide electrode for a lithium ion battery and a preparation method of the oxide electrode, and belongs to the technical field of lithium ion batteries. The preparation method of the titanium-niobium oxide negative electrode material comprises the following steps: weighing corresponding titanium dioxide powder and niobium pentoxide powder according to the chemical dosage ratio of TixNbyO2x + 2.5 y, putting the titanium dioxide powder and the niobium pentoxide powder into a mortar, fully grinding, uniformly mixing to obtain a precursor, uniformly coating and flatly paving the precursor on a slide, putting the slide under laser heating equipment, and carrying out high-temperature sintering to obtain the titanium-niobium oxide negative electrode material. And finally, preparing the product into a pole piece assembled battery, and carrying out electrochemical test on the pole piece assembled battery. According to the method, the solid-phase synthesis time is remarkably shortened through laser heating, the rate capability and the cycle performance of the battery are improved, and the preparation efficiency of the material is improved on the basis of ensuring high-quality formed phase and fine and uniform particle size.

The invention relates to a preparation method of a niobium pentoxide loaded molybdenum disulfide catalyst and application of the niobium pentoxide loaded molybdenum disulfide catalyst in lignin conversion. The preparation method comprises the following steps: dissolving ammonium molybdate heptahydrate and thiourea in distilled water, adding Nb2O5, and adjusting the pH value of the mixture to 0.8-1.1 by using hydrochloric acid; transferring the solution into a stainless steel autoclave for hydrothermal reaction; centrifugally separating to obtain a black precipitate, washing with water and absolute ethyl alcohol, and drying in vacuum overnight; and placing the obtained substance in a high-temperature and high-pressure reaction kettle, screwing the reaction kettle to seal the reaction kettle, discharging gas after introducing H2, discharging air in the device, pressurizing to 3-5 MPa, and reacting to obtain the catalyst Nb2O5-MoS2. The catalyst shows excellent activity of aromatic phenol and ether compound hydrodeoxygenation for aromatic hydrocarbon preparation. The invention provides the catalyst which is low in cost, simple and convenient to prepare and excellent in performance, after ten cycle experiments, the activity of the catalyst is still stable, and the indexes of the conversion rate and the yield are reduced by less than 5%.

The invention relates to a multi-element synergistic doped ATO target material and a preparation method thereof. Comprising the following steps: 1) uniformly mixing water and a powder dispersant, then adding an oxide 1 (at least one of tantalum pentoxide, niobium pentoxide, vanadium pentoxide, gallium oxide and tungsten trioxide), an oxide 2 (at least one of zinc oxide, copper oxide, cobalt oxide, manganese oxide and cerium oxide) and ATO raw material powder, and mixing and homogenizing to prepare slurry; 2) grinding the slurry and adding a powder forming adhesive; 3) carrying out spray drying granulation on the ground slurry; according to the preparation method, the ATO target material with high compactness (relative density gt, 98.5%) and low resistance (resistivity lt, 5 * 10 <-3 > omega.cm) is prepared through multi-element synergistic doping of the oxide, and the problem that compactness and conductivity of the ATO target material are difficult to consider at the same time in the prior art is solved.

The invention relates to the technical field of electrode materials, in particular to a compaction-resistant ultrahigh-nickel high-entropy positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out a co-precipitation reaction on a mixed salt solution and a mixed nano metal oxide sol under an alkaline condition to obtain a precursor; and mixing the precursor, a high-hardness nano metal oxide and a lithium source, and sintering to obtain the compaction-resistant ultrahigh-nickel high-entropy positive electrode material, the mixed salt solution comprises Ni < 2 + >, Co < 2 + > and Mn < 2 + >; the nano metal oxide in the mixed nano metal oxide sol comprises at least three of nano aluminum oxide, nano zirconium oxide, nano titanium dioxide and nano magnesium oxide; the high-hardness nano metal oxide comprises one or more of nano zirconium oxide, nano titanium dioxide, nano tungsten trioxide and nano niobium pentoxide. The compaction-resistant ultrahigh-nickel high-entropy positive electrode material prepared by the preparation method provided by the invention is uniform in granularity and high in compression resistance.

The invention discloses an AR film and a preparation method thereof. The AR film comprises a surface film layer group, an AR use layer group and a bottom film layer which are sequentially laminated, the AR use layer group comprises an AR coating group, a hardened coating, a base material layer, a colorful coating and a pressure-sensitive adhesive layer which are attached in sequence; the AR coating group comprises an AF coating and a functional coating, and the functional coating comprises one or a combination of more of a silicon dioxide coating, a niobium pentoxide coating and a silicon oxide coating; according to the invention, the AR coating group and the colorful coating are reasonably arranged, and on the basis of having the anti-reflection and anti-reflection functions of a traditional AR film, the visual effect of the AR material is enhanced by utilizing the optical performance of the colorful coating and having the light arrangement polarization function, so that the overall color phenomenon looks more uniform and gorgeous, the visual feeling of consumers is improved, and the user experience is further improved. According to the preparation method provided by the invention, the AR film with good anti-reflection and anti-reflection effects and a good visual effect can be rapidly and stably prepared, and wide popularization and application are facilitated.

The invention discloses a current collector active material and a preparation method and application thereof, and relates to the technical field of electrochemical energy storage. Comprising the following steps: dissolving acid, a niobium precursor and aniline in water to form a solution A; dissolving ammonium persulfate in water to form a solution B, adding the solution B into the solution A, uniformly mixing, standing for reaction, carrying out suction filtration and drying to obtain niobium-doped polyaniline carbon nanotubes, and carrying out heat treatment on the niobium-doped polyaniline carbon nanotubes in a protective atmosphere to obtain amorphous carbon nanotubes embedded with niobium pentoxide nanoparticles. The method can be used for preparing a negative-electrode-free sodium metal battery current collector and a negative-electrode-free sodium metal battery. According to the method, hectogram or even kilogram-level superfine amorphous carbon nanotubes embedded with niobium pentoxide nanoparticles can be prepared in a single batch in a macroscopic manner, and Nb2O5 nanoparticles anchored in the carbon tubes are subjected to reversible intercalation pseudocapacitance reaction, so that the sodium ion migration rate is remarkably increased, sodium ions are preferentially adsorbed, the nucleation overpotential is greatly reduced, and the performance of the carbon nanotubes is improved. And the assembled negative-electrode-free sodium metal total battery shows an extremely high capacity retention ratio.

The invention provides a preparation method of a high-conductivity lithium manganese iron phosphate material, the preparation raw materials of the lithium manganese iron phosphate material comprise a three-dimensional sheet niobium pentoxide conductive frame, a manganese source, an iron source, a lithium source and a carbon source, the niobium pentoxide conductive frame is of a sheet porous structure, the structure can accommodate the lithium manganese iron phosphate material to be filled between sheet layers and pores, so as to form a three-dimensional spherical structure; the obtained spherical lithium manganese iron phosphate material has excellent conductivity and processability, and can show relatively high discharge capacity of a button cell when being used as a positive electrode material of a lithium ion battery.

The invention discloses a method for preparing 6N and above high-purity Nb2O5 by using a niobium oxalate precursor, belongs to the technical field of niobium pentoxide preparation, and solves the problems of low purity and high impurity content of Nb2O5 prepared by the existing method. The method comprises the following steps: mixing niobium oxalate with high-purity water to obtain a mixed solution; performing cold crystallization purification; separating niobium oxalate crystals from the mother liquor, washing and drying; the method comprises the following steps: putting niobium oxalate crystals into a crucible, putting the crucible into a vacuum reaction distillation furnace, sealing a system, vacuumizing to below 1Pa, carrying out inert gas replacement, and then carrying out stage heating and heat preservation; cooling to 800-900 DEG C, introducing high-purity oxygen into the system, and carrying out oxidation stabilization treatment at a constant temperature; after treatment, continuously cooling to 200 DEG C or below, and then naturally cooling to room temperature to obtain a high-purity Nb2O5 product. The Nb2O5 product prepared by the method disclosed by the invention is high in purity and low in impurity content.

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.

In a method of making an electrode, a binder is dissolved in a solvent to form a solution. An Nb2O5 hydrate-based electrode material powder is suspended in the solution to form a slurry. A predetermined thickness of the slurry is dispensed onto a conductive member so that the slurry has a mass loading in a range of 1 mg cm−2 to 2 mg cm−2. The conductive member and the slurry are dried to form the electrode. A battery includes an anode, a cathode, an electrolyte and a separator. The anode includes a graphite-modified Nb2O5 composite electrode material powder applied to a conductive member. The electrolyte is in electrical communication with the anode and the cathode. The separator is permeable to the electrolyte and is disposed between the anode from the cathode.

This invention discloses a method for preparing interface-reinforced niobium pentoxide / porous graphene and its energy storage application. The method involves adding porous graphene oxide during the solvothermal synthesis of a niobium pentoxide precursor to obtain a composite precursor of niobium pentoxide and porous graphene oxide. This precursor is then annealed under a protective atmosphere to obtain the interface-reinforced niobium pentoxide / porous graphene composite material. The composite material obtained by this invention exhibits excellent performance as an electrochemical energy storage material. Furthermore, the preparation method of this invention is simple to operate, requires no complex equipment, and is easily controlled, making it suitable for mass production.

The invention discloses a fast-response thermistor material suitable for an intelligent space expansion structure and a preparation method thereof. The method comprises the following steps: by taking yttrium oxide, tetraterbium heptaoxide, niobium pentoxide and praseodymium oxide as raw materials, mixing, grinding, calcining, regrinding, performing cold isostatic pressing, sintering at a high temperature and the like, thereby obtaining the fast-response thermistor material suitable for the intelligent space expansion structure. The niobate thermistor material is obtained. The thermistor has the advantages of being high in high-temperature stability, high in linearity, low in heat conductivity and the like, and the prepared niobate ceramic wafer-shaped high-density ceramic material is good in density, has the excellent negative temperature coefficient characteristic, and is fast in response and high in reliability; the temperature sensing material is suitable for high-precision and stable temperature monitoring in the work of an intelligent space expansion structure.

The application discloses a manganese-based composite monatomic catalyst and a method for propane low-temperature oxidation to prepare acetone, the manganese-based composite catalyst is characterized by taking manganese as an active component, at least one of iron, cobalt, copper and nickel as a first assistant, at least one of carbon and nitrogen as a second assistant, and at least one of aluminum oxide, cerium oxide, zinc oxide, zirconium oxide and niobium pentoxide as a carrier. The manganese-based composite monatomic catalyst is used in propane oxidation reaction with oxygen as an oxidant, and does not need to be matched with strong acid solvents, carbon monoxide and other harmful substances during use, is green and environment-friendly, can realize high-efficiency catalytic reaction under low-temperature conditions, and can obtain acetone with high selectivity, and the acetone yield can reach 45-55mmolg 催化剂 ‑1 h ‑1 The content of acetone in the liquid product can reach 65% at most, and the catalyst has excellent stability and can be stably recycled for 5 times without obvious deactivation.

The invention belongs to the technical field of lithium ion battery materials and electrochemistry, and discloses high-entropy doped niobium pentoxide nanoparticles as well as a preparation method and application thereof. The chemical formula of the nano-particles is Nb < 1-x > FeaCoeNiiCrjAlkO2, x = a + e + i + j + k, and x is larger than or equal to 0.04 and smaller than or equal to 0.06, 0 lt; a < lt >; 1, 0lt; lt, lt; 1, 0lt; ilt; 1, 0lt; jlt; 1, 0lt; klt; 1; the material has an orthorhombic system and a space group P2 / m, doped metal occupies Nb sites in an atomic-scale dispersion manner, and a unit cell parameter c axis is expanded to 0.41 nm; and the size of the nano particles is 50 to 200 nm. According to the preparation method, a hydrothermal method is combined with high-temperature sintering, niobium pentachloride is used as a niobium source, specific metal salt is used as a doping source, terephthalic acid is used as a ligand, and the material is prepared through the steps of solution preparation, hydrothermal reaction, drying and sintering. The nano-particles are high in electron conductivity and fast in lithium ion diffusion, the capacity reaches 156 mAh. G <-1 > under the rate of 100 C, the capacity retention rate is 88% or above after 1000 times of circulation under the rate of 10 C, and the nano-particles can be used as an excellent lithium ion battery negative electrode material and are suitable for the field of high-power lithium ion batteries.

The invention discloses a petuntse composition, ceramic and application, and relates to the technical field of ceramic. The ceramic disclosed by the invention is obtained by sequentially carrying out ageing treatment, sieving treatment, injection molding, airing, drying and sintering treatment on a petuntse composition. The petuntse composition comprises a ceramic waste material A, a ceramic waste material B and modified particles with gallium-coated cuprous oxide as a core and aluminum oxide as a shell in a specific proportion. And the components such as a high-entropy oxide solid solution generated by the reaction of hafnium oxide, tantalum pentoxide, niobium pentoxide, titanium dioxide, zirconium dioxide, chromium sesquioxide and carbon powder, and chromium heptacarbide are introduced, so that the ceramic prepared from the ceramic waste has excellent fracture toughness, bending strength, wear resistance, high temperature resistance and self-repairing ability. Therefore, the method has a wide application prospect.

The invention particularly relates to a photochromic TPU film and a preparation method thereof.The photochromic TPU film comprises a thermoplastic polyurethane elastomer and a photochromic material, the photochromic material is formed by mixing doped metal ions and Nb < 5 + > according to the molar ratio of 20-120 mol%, the doped metal ions are # imgabs0 # Fe < 3 + >, # imgabs1 # or # imgabs2 #, corresponding metal salt is added into the doped metal ions, the doped metal ions are doped metal ions, the doped metal ions are doped metal ions, the doped metal ions are doped metal ions, the doped metal ions are doped metal ions, the doped metal ions are doped metal ions, the doped metal ions are doped metal ions, the doped metal ions are doped metal ions, the doped metal ions are doped metal ions, and the doped metal ions are doped metal ions. The molar ratio of the doped metal to Nb is controlled to optimize the distribution concentration of the doped metal and particles, and TPU is adopted to improve the mechanical property of the film. According to the photochromic TPU film, a metal in-situ growth technology is adopted, the preparation process is simplified, dependence of high energy consumption and complex preparation means is avoided by in-situ growth of niobium pentoxide nanoparticles doped with metal elements in TPU, the production cost is greatly reduced, and the photochromic TPU film has good large-scale production potential.

The invention discloses a high-capacity porous niobium pentoxide material as well as a preparation method and application thereof, relates to niobium pentoxide as well as preparation and application thereof, and aims to solve the technical problems of low conductivity and slow ion diffusion of the conventional orthorhombic phase niobium pentoxide material. The material is formed by interconnection of niobium pentoxide matrix nanoparticles of 100-300 nm, secondary nanoparticles of 10-30 nm grow on the surface, and the material is in a raspberry-shaped multistage assembly morphology; the catalyst has mesopores with the pore diameter of 2-20 nm and the specific surface area of 15-45 m < 2 > / g; and the material has an orthorhombic phase niobium pentoxide structure and a carbon doping characteristic. The preparation method comprises the following steps: by taking a surfactant containing quaternary ammonium cations as a soft template, driving niobium salt and organic quaternary ammonium cations to be assembled by utilizing an electrostatic-coordination synergistic effect, and sintering at high temperature in an inert atmosphere. When used as a negative electrode of a lithium ion battery, the lithium ion battery can reach the capacity of 350 mAh / g under the current density of 0.1 A / g, and can be used in the field of fast-charge alkali metal ion batteries.

The invention provides a multi-modified lithium-rich manganese-based positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a lithium-rich manganese-based precursor, a lithium source, lithium fluoride, niobium pentoxide and a fluxing agent to obtain a mixed material, and carrying out first sintering treatment on the mixed material to obtain a first sintered material; mixing the primary sintering material with a carbon source, and performing secondary sintering treatment to obtain a secondary sintering material; and mixing the secondary sintering material with lithium metaphosphate, and carrying out third sintering treatment to obtain the multi-modified lithium-rich manganese-based positive electrode material. The lithium-rich manganese-based positive electrode material is subjected to multiple modification, so that the problem of structural stability of a material body is solved, the interface effect is improved, surface passivation can be realized, and no extra resistance is generated for ion and electron transmission.

The invention discloses an ultrahigh-Bs manganese-zinc soft magnetic ferrite material for a PFC (power factor correction) inductor. The ultrahigh-Bs manganese-zinc soft magnetic ferrite material comprises main components and auxiliary components, the main component is prepared from the following substances in percentage by weight: 76.5 to 79.8 weight percent of Fe203, 8.8 to 12.3 weight percent of ZnO and the balance of Mn3O4; the auxiliary component is one or more of calcium carbonate, lithium carbonate, nickel protoxide, niobium pentoxide and vanadium pentoxide, and the trace amount of added Ca2CO3 is 300-800 ppm and the trace amount of added Li2C03 is 500-5000 ppm by taking ppm of mass fraction as a measurement; the content of NiO is 1000 to 5000 ppm; v2O5: 100 to 500 ppm (parts per million); and the content of Nb2O5 is 200 to 400 ppm. The beneficial effects of the invention are that the device has the characteristics of ultrahigh Bs and low power consumption; the characteristic of high Bs can be fully utilized, the inductor is suitable for the PFC inductor of the switching power supply, and the temperature rise can also be met; meanwhile, the material cost is far lower than that of a metal magnetic powder core material, the problem that a magnetic core with a complex shape produced by a metal magnetic powder core is difficult to form is solved, and the performance and cost requirements of the design of a high-power and high-power-density power transformer can be better met.

The invention discloses a preparation method of a negative temperature coefficient thermistor material for measuring the temperature of a new energy vehicle engine. The method uses raw materials such as calcium carbonate, cerium oxide, niobium pentoxide, and manganese dioxide as raw materials through processes of mixing and grinding, calcination, re-grinding, cold isostatic pressing, high-temperature sintering, and electrode coating processes to obtain a CaCeNbMnO7 composite thermistor material with a special structure, which has Ca2Nb2O7 as the main phase and a network conductive channel formed by the connection of structures such as cerium oxide and manganese oxide. The composite thermistor of the invention has the advantages of strong thermal cycle stability, high linearity, and large B value. The prepared CaCeNbMnO7 ceramic disc-shaped high-density ceramic material has good density, and the aging drift rate after aging at 500 °C for 400 h is less than 2%. It has excellent negative temperature coefficient characteristics and is suitable for use as a temperature sensing element for monitoring the temperature of a new energy vehicle engine.

The application discloses a preparation method of a sheet-shaped Nb element doped modified bismuth titanate catalyst material. 3‑x Nb x O 12 , wherein 0.15<=x<=0.40, the molar ratio of Bi, Ti and Nb is taken as bismuth oxide, titanium dioxide and niobium pentoxide; step two: the raw materials in step one and the mass ratio of the molten salt are mixed, then the mixture is put into a crucible and fully grinded to obtain a mixture; step three: the mixture prepared in step two is fired in a muffle furnace, and a light yellow product is obtained after cooling; step four: the light yellow product prepared in step three is washed with deionized water, filtered and dried to obtain a sheet-shaped Nb element doped bismuth titanate catalyst powder. The technology can significantly improve the structural uniformity, defect concentration and piezoelectric response activity of the material, greatly reduce the energy consumption and time cost, provides an efficient path for large-scale production of high-performance catalysts, and has a wide market prospect.