48 results about "Iron nitride" patented technology

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.

The invention provides a high-toughness austenitic stainless steel welding rod for 5Ni steel and a preparation method of the high-toughness austenitic stainless steel welding rod. The welding rod comprises a core wire and a coating coated on the surface of the core wire, and based on the total amount of the core wire, the core wire comprises the following components in percentage by mass: less than or equal to 0.09% of C, less than or equal to 0.15% of Si, 1.6-2.5% of Mn, 18.5-20.5% of Cr, 12.5-14.5% of Ni, 2.1-3.2% of Mo and 0.06-0.18% of Ti; 0.12-0.24% of Al, less than or equal to 0.007% of S, less than or equal to 0.008% of P, less than or equal to 0.006% of O, less than or equal to 0.001% of H, less than or equal to 0.012% of S + P, and the balance Fe and inevitable impurities. On the basis of the total amount of the coating, the coating comprises, by mass, 28-38% of carbonate, 15-20% of fluorite, 1-3% of lithium fluoride and sodium fluoride, 8-12% of synthetic mica, 3-6% of potassium silicotitanate, 2-4% of zircon sand, 9-15% of electrolytic manganese metal, 2-4% of ferrotitanium, 2-5% of passivated nickel-magnesium alloy, 1-3% of atomized ferrosilicon, 1-3% of lanthanum cerium fluoride, 1-3% of tungsten and molybdenum, 3-5% of nitrided ferrochromium and 1-2% of CMC. The welding rod is good in all-position welding controllability, extremely low in air hole sensitivity and excellent in low-temperature toughness, and can meet the requirements for high-quality and efficient welding of 5Ni steel.

The invention discloses a preparation method of a high-hydrogen-resistance pure iron nitriding composite diaphragm, which comprises the following steps: putting a matrix into a controllable atmosphere well type nitriding furnace, raising the temperature in the controllable atmosphere well type nitriding furnace to 460-500 DEG C at the temperature raising rate of 5-15 DEG C / min, and carrying out heat preservation for 2-6 hours to nitride the matrix; the base body is placed in a uniform temperature area of a tubular vacuum heat treatment furnace, the tubular vacuum heat treatment furnace is vacuumized, the temperature in the tubular vacuum heat treatment furnace is increased to 480-520 DEG C at the speed of 5-15 DEG C / mi, and heat preservation is conducted for 0.5-2 hours; taking out the matrix after the temperature in the tubular vacuum heat treatment furnace is reduced to room temperature; the hydrogen resistance of the prepared composite diaphragm can reach 13 times that of a pure iron matrix, the performance improvement amplitude is far higher than 3 times that of single gas nitriding treatment, and the composite diaphragm has the characteristics of good mechanical stability and strong deformation resistance.

The application relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method thereof. The high-temperature-resistant flux-cored wire containing rare earth elements comprises a wire sheath and a core; the core comprises the following raw materials: dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, aluminiferous iron, potassium cryolite, potassium titanate, sodium titanate, iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, chromium-iron nitride, bismuth oxide, an additive, and the balance of reduced iron powder; the additive is a mixture of zirconium-iron alloy, ferrotitanium alloy and aluminum-magnesium alloy. The application introduces a specific alloy additive into the core to protect the transition of the rare earth yttrium, optimizes the welding performance of the yttrium and multiple components in cooperation, matches the 253MA heat-resistant steel, adjusts the components of the molten slag and the electric arc, and reasonably processes the technology, so that the welding quality of the wire is improved.

The invention provides a Yolk-shell type carbon composite iron nitride negative electrode material as well as a preparation method and application thereof. The Yolk-shell type carbon composite iron nitride negative electrode material comprises a shell, a cavity surrounded by the shell and an inner core arranged in the cavity, and the particle size of the Yolk-shell type carbon composite iron nitride negative electrode material is 180-400 nm; the shell is a carbon shell, and the thickness of the carbon shell is 10nm-30nm; the inner core is cubic iron nitride, and the particle size of the cubic iron nitride is 60-180 nm. The Yolk-shell type carbon composite iron nitride negative electrode material provided by the invention has a larger specific surface area, so that the contact between an electrolyte and an electrode is improved, the diffusion path of Na < + > transmission is reduced, and finally, the obtained sodium ion battery shows higher cycling stability.

To provide a steel part with excellent surface fatigue strength and a method for manufacturing the same. [Solution] The device comprises a steel core, a compound layer containing iron nitride, and a nitrogen diffusion layer between the steel core and the compound layer, wherein the steel core has the following composition by mass%, C: 0.05~0.30%, Si: 0.05~2.00%, Mn: 1.50~3.00%, P: 0.030% or less, S: 0.100% or less, Cr: 0.05~2.00%, V: 0.02~1.30%, Al: 0.100% or less, and N: 0.0250% or less. A steel part and a method for manufacturing the same, having a chemical composition containing the following, with the remainder being Fe and impurities, a compound layer thickness of more than 3 to 30 μm, the compound layer containing more than 50% γ' phase by area ratio, with the remainder being ε phase, containing 5 to 40% γ phase by area ratio in the region up to 10 μm from the surface of the nitrogen diffusion layer, and having a Vickers hardness of 580 HV or more at a depth of 0.05 mm from the surface of the nitrogen diffusion layer.

The invention relates to the technical field of catalyst preparation, and provides an iron-based catalyst, a preparation method and application thereof, and a method for preparing olefin from synthesis gas. The iron-based catalyst comprises 30-60 parts by mass of a carrier and 40-70 parts by mass of an active component, the active component comprises a composition of which the chemical formula is Fe100AaKbOx (Fe4N) c according to an atomic ratio; wherein A comprises at least one of Mo, W and Cr, the value range of a is 5-30, the value range of b is 1-10, the value range of c is 10-25, and x is the total number of oxygen atoms required by valence of each element in the catalyst. The iron-based catalyst provided by the invention simultaneously contains an iron oxide and an iron nitride, can be used for Fischer-Tropsch synthesis, and is beneficial to improvement of olefin selectivity; the CO conversion rate and the olefin selectivity can be further improved by limiting the ratio of iron oxide to iron nitride on the surface of the catalyst; and the method is suitable for a fluidized bed reactor, and can effectively solve the problem of difficulty in heat removal in high-temperature Fischer-Tropsch synthesis.

A permanent magnet may include a Fe16N2 phase constitution. In some examples, the permanent magnet may be formed by a technique that includes straining an iron wire or sheet comprising at least one iron crystal in a direction substantially parallel to a <001> crystal axis of the iron crystal; nitridizing the iron wire or sheet to form a nitridized iron wire or sheet; annealing the nitridized iron wire or sheet to form a Fe16N2 phase constitution in at least a portion of the nitridized iron wire or sheet; and pressing the nitridized iron wires and sheets to form bulk permanent magnet.

The invention belongs to the technical field of environmental functional materials and soil remediation, and particularly relates to a micron-sized zero-valent iron nitride catalyst as well as a preparation method and application thereof. The invention provides a nitrided micron zero-valent iron catalyst which is prepared by doping micron-sized iron powder with urea, the nitrogen content of the catalyst is 0.5 wt%-4.5 wt%, and the particle size of the micron-sized iron powder is 10-300 microns. The preparation method comprises the following steps: putting raw materials urea and micron-sized iron powder into a ball milling tank, adding grinding balls, and carrying out ball milling for 2-10 hours at the rotating speed of 450-550rpm in an air atmosphere; and drying the product after ball milling is finished, thereby obtaining the product. The catalyst is not only suitable for efficient deep treatment of high-concentration organic contaminated leacheate, but also can be directly used for chemical oxidation remediation of contaminated soil, and has remarkable engineering application value.

The invention belongs to the technical field of materials, and particularly relates to a high-performance functional composite elastomer material and a preparation method and application thereof. The iron nitride hollow microsphere wave-absorbing agent is prepared through a solvothermal reaction and a nitriding process. And the material density is reduced while the magnetic loss capability is improved. The appearance of the hollow microspheres is beneficial to multiple scattering and reflection of electromagnetic waves in the hollow microspheres, and the electromagnetic wave absorption capacity of the material is improved. When the thickness is 2 mm, the minimum reflection loss reaches-56.3 dB, and the effective absorption bandwidth reaches 6.9 GHz. Besides, iron nitride is combined with a self-repairing thermoplastic polyurethane matrix, so that the obtained high-performance functional composite elastomer material has excellent self-repairing capability, and the durability of a material system is remarkably improved. The preparation method is simple in process and low in cost, does not need complex synthesis equipment, and can be used for large-scale and large-batch production.

According to an exemplary embodiment of the present invention, provided is an ammonia decomposition system capable of minimizing the generation of iron nitride as a by-product.

The application discloses a composite heat insulation material with wave absorption performance, a multilayer phase interface structure containing the composite heat insulation material and a preparation method of the multilayer phase interface structure; the composite heat insulation material comprises: a heat insulation material and a wave absorber, wherein the heat insulation material is yttrium zirconium oxide YSZ powder; the wave absorber is samarium iron nitride SmFeN powder; the mass ratio of the heat insulation material to the wave absorber is 1:1; the multilayer phase interface structure containing the composite heat insulation material comprises: a YSZ / SmFeN uniform mixing structure, an interface structure parallel to incident electromagnetic waves, an interface structure vertical to the incident electromagnetic waves and a periodic arrangement interface structure containing both the interface vertical to the incident electromagnetic waves and the interface parallel to the incident electromagnetic waves.

The invention relates to the field of functional polymer materials, and discloses a samarium-iron-nitrogen magnetic EPDM (Ethylene-Propylene-Diene Monomer) foamed rubber composite material and a preparation method thereof.The preparation method comprises the following steps: firstly, uniformly dispersing samarium-iron-nitrogen magnetic powder in an EPDM (Ethylene-Propylene-Diene Monomer) matrix by adopting a mechanical blending method, and forming a foamed rubber matrix with an open-pore or closed-pore structure by adopting a two-stage vulcanization process; and finally, magnetizing by adopting a single-sided multi-stage magnetizing device to obtain the magnetic EPDM foamed rubber composite material. According to the preparation method provided by the invention, the samarium-iron-nitrogen magnetic EPDM foamed rubber composite material with excellent magnetic property, good mechanical property and relatively high foaming ratio can be obtained, the sealing property can be improved by utilizing the excellent magnetic property, and the samarium-iron-nitrogen magnetic EPDM foamed rubber composite material has a good application prospect in the field of magnetic sealing.

The invention provides a flexible magnetic sheet and a preparation method thereof and false eyelashes, and the flexible magnetic sheet comprises the following components in percentage by weight: 88-94 parts of samarium-iron-nitrogen magnetic powder, 6-10 parts of a binder, 0.7-1.5 parts of a coupling agent, 0.2-0.8 part of a lubricant and 0.2-0.8 part of a heat stabilizer; wherein the samarium iron nitrogen magnetic powder is granular, and the average particle size of the samarium iron nitrogen magnetic powder is 2-50 microns. The false eyelashes prepared by the method have better flexibility and stability and strong sweat corrosion resistance, and the flexible magnetic sheet has better flexibility, light weight, better suitability with the false eyelash body and longer service life, and has wide industrial application prospects.

The invention provides a preparation method of samarium-iron-nitrogen magnetic powder, which comprises the following steps: mixing iron, samarium oxide and rare earth hydride (as a reducing agent, preferably lanthanum hydride and / or cerium hydride), performing ball milling treatment, and performing briquetting treatment on the obtained mixed material to obtain a green body; performing vacuum heat treatment on the green body to obtain a coarse samarium ferromagnetic powder material; crushing the coarse samarium-iron magnetic powder material, placing the crushed coarse samarium-iron magnetic powder material in an ammonia atmosphere, and carrying out high-temperature nitriding treatment to obtain coarse samarium-iron-nitrogen magnetic powder; and transferring the crude samarium-iron-nitrogen magnetic powder into a washing solution for cleaning treatment so as to remove residual non-magnetic impurities in a solid phase, thereby obtaining the samarium-iron-nitrogen magnetic powder, the preparation method for preparing the samarium-iron-nitrogen magnetic powder has the advantages of being small in reducing agent dosage, low in heat treatment temperature, short in time and the like, and the preparation cost of the samarium-iron-nitrogen magnetic powder is effectively reduced.

The invention relates to the technical field of catalyst preparation, and provides an iron catalyst, a preparation method and application thereof, and a method for preparing olefin through carbon dioxide hydrogenation. The iron catalyst comprises an active component and a carrier in a mass ratio of (40-70): (30-60), the active component comprises a composition with a chemical formula of Fe < 100 > A K O < x > (Fe < 4 > N) < c > according to an atomic ratio; wherein A comprises at least one of Mn, Cu and Zn, the value range of a is 10-30, the value range of b is 1-10, the value range of c is 1-8, and x is the total number of oxygen atoms required by valence of each element in the catalyst. The iron catalyst provided by the invention simultaneously contains an iron oxide and an iron nitride, can be used in a reaction for preparing olefin through carbon dioxide hydrogenation, and is beneficial to improving the conversion rate of carbon dioxide and the selectivity of olefin, especially C4 + olefin; and the method is suitable for a fluidized bed reactor, and can effectively solve the problems of difficulty in heat removal, easiness in temperature runaway and easiness in catalyst deactivation in high-temperature Fischer-Tropsch synthesis.

All example composition may include a plurality of grains including an iron nitride phase. The plurality of grains may have an average wain size between about 10 nm and about 200 nm. An example technique may include treating a composition including a plurality of grains including au iron-based phase to adjust an average grain size of the plurality of grains to between about 20 nm and about 100 ma. The example technique may include nitriding the plurality of grains to form or grow an iron nitride phase.

The invention provides a secondary battery, a preparation method thereof and an electric device. The secondary battery comprises a positive pole piece, a negative pole piece and a diaphragm, the diaphragm is located between the positive pole piece and the negative pole piece, the diaphragm comprises a first polymer layer and a material layer arranged on the first polymer layer, and the material layer comprises an inorganic material. The inorganic material comprises lithium titanium aluminum phosphate, lithium germanium aluminum phosphate, lithium titanium germanium aluminum phosphate, lithium titanium tantalum aluminum phosphate, lithium tetrathiophosphate, lithium germanium phosphorus sulfur sulfide, lithium phosphorus sulfur chlorine sulfide, ferric oxide, copper oxide, titanium dioxide, tin dioxide, manganese dioxide, zinc oxide, zirconium dioxide, chromium nitride, vanadium nitride, nickel nitride, iron nitride, graphene oxide, graphite oxide and graphite fluoride; the secondary battery is one or more of fluorinated graphene, fluorinated carbon nanotubes and fluorinated carbon fibers, and the secondary battery has excellent high-rate cycle performance and long service life.

The invention relates to a four-layer metal oxide / metal / metal / metal oxide coating that provides multispectral camouflage. Said coating having camouflage characteristics provides thermal, multispectral and electromagnetic protection by offering reflection, absorption and transmission properties against infrared (IR), ultraviolet (UV) and electromagnetic waves. As the ceramic layer, it comprises titanium dioxide (TiO₂), titanium nitride (TiN), zinc oxide (ZnO), zinc nitride (Zn₃N₂), iron (III) oxide (Fe₂O₃), iron (II) oxide (FeO), iron nitride (Fe₂N), aluminium oxide (Al₂O₃), aluminium nitride (AlN), tin oxide (SnO₂), magnesium oxide (MgO), magnesium nitride (Mg₃N₂), calcium oxide (CaO), calcium nitride (Ca₃N₂), cobalt oxide (CoO), tungsten oxide (WO₃), vanadium oxide (V₂O₅), vanadium nitride (VN), manganese oxide (MnO₃), chromium oxide (Cr₂O₃), chromium nitride (CrN), nickel oxide (NiO), boron oxide (B₂O₃), boron nitride (BN) or barium oxide (BaO). As the metal layer, copper (Cu), aluminium (Al), nickel (Ni), cobalt (Co), silver (Ag), gold (Au), iron (Fe), tungsten (W), tin (Sn), zinc (Zn), magnesium (Mg), vanadium (V), chromium (Cr), lead (Pb) or platinum (Pt) is used to provide protection against thermal cameras and UV rays, while electromagnetic waves are blocked. The adhesive-free layered structure is resistant to wear and provides versatile protection for military clothing and mobile platforms by optimising reflection and transmission.

The utility model relates to an electric control heating technology, in particular to a split mounting type all-wood surrounded electric heating digital display temperature control tea frying pan which comprises a conical outer barrel formed by encircling and splicing a plurality of wood plate shells, and a heat preservation rock plate inner barrel arranged in the conical outer barrel, a circle of wooden upper edge is arranged on the edge of the top of the conical outer barrel, a nitriding iron pan is arranged on the wooden upper edge, an electric heating plate is installed in the inner barrel, and the electric heating plate is electrically connected with a circuit module installed on the surface of the conical outer barrel through a controller. A wood bottom is arranged at the bottom of the conical outer barrel, and the wood bottom, the conical outer barrel and the wood upper edge are connected through mortise and tenon joint structures. The nitriding iron pan is not easy to rust and longer in service life after being subjected to gas nitrogen treatment, and the electric heating disc is connected with the circuit module through the controller, so that not only can the temperature be adjusted, but also the effects of over-current protection and electric leakage protection are achieved.

In general, the disclosure is directed to bulk iron-nitride materials having a polycrystalline microstructure having pores including a plurality of crystallographic grains surrounded by grain boundaries, where at least one crystallographic grain includes an iron-nitride phase including any of a body centered cubic (bcc) structure, a body centered tetragonal (bct), and a martensite structure. The disclosure further describes techniques producing a bulk iron-nitride material having a polycrystalline microstructure, including: melting an iron source to obtain a molten iron source; fast belt casting the molten iron source to obtain a cast iron source; cooling and shaping the cast iron source to obtain a bulk iron-containing material having a body-centered cubic (bcc) structure; annealing the bulk iron-containing material at an austenite transformation temperature and subsequently cooling the bulk iron-containing material; and nitriding the bulk iron-containing material to obtain the bulk iron-nitride material.

The embodiment of the invention provides a samarium-iron-nitrogen magnetic material and a preparation method and application thereof.The samarium-iron-nitrogen magnetic material comprises samarium-iron-nitrogen particles and samarium oxide particles, at least part of the samarium oxide particles are free among the samarium-iron-nitrogen particles, the average mass content of oxygen in the surface layers of the samarium-iron-nitrogen particles is smaller than or equal to 3.6%, and the average mass content of the samarium oxide particles is smaller than or equal to 3.6%. The surface layer is an area of the samarium-iron-nitrogen particles with the radius depth of 100nm from the surface to the inside. The oxidation degree of the samarium-iron-nitrogen particles in the samarium-iron-nitrogen magnetic material is low, the magnetic performance and stability are improved, and the free samarium oxide particles have a dispersion strengthening effect and can generate a grading effect with the samarium-iron-nitrogen particles; when the samarium-iron-nitrogen magnetic material is used for preparing a magnet, the filling rate of the magnetic material in the magnet can be increased, and the magnetic properties and mechanical properties such as residual magnetism, coercive force and magnetic energy product of the magnet are enhanced.

The present application relates to the technical field of stainless steel material, and particularly discloses a high-temperature-resistant stainless steel for ovens and a preparation method thereof. First, the stainless steel is passivated by using a sodium molybdate electrolyte to inhibit the migration of elements such as chromium in the stainless steel during use. Then, a titanium iron nitride layer and an aluminum titanium nitride / titanium silicon nitride layer are designed on the stainless steel. The two layers work together to transition the thermal expansion coefficient and enhance the high-temperature resistance. The element migration and diffusion are prevented. Finally, a porous magnesium titanate ceramic layer loaded with silver zinc antibacterial agent is deposited. The magnesium titanate ceramic itself has good high-temperature resistance and thermal shock resistance, and has a good thermal conductivity. After impregnating the antibacterial agent and sealing the pores, the magnesium titanate ceramic has good antibacterial performance.

The invention discloses a preparation method of a porous nitrogen-doped carbon carrier loaded multivalent iron active center. The method comprises the following steps: crushing the waste biomass, mixing the crushed waste biomass with a Fe precursor solution composed of FeCl2, FeCl3, citric acid and ascorbic acid, dipping, and evaporating to dryness to obtain a pretreated sample; then high-temperature pyrolysis treatment is carried out in the ammonia gas atmosphere, by regulating and controlling the pyrolysis temperature and the proportion of the Fe precursor solution, iron species are gradually reduced, active nitrogen species generated through ammonia gas pyrolysis are doped into a carbon skeleton, nitrogen sites anchor iron particles, lone pair electrons of pyridine nitrogen and pyrrole nitrogen coordinate with iron atoms, a Fe-Nx active center is formed, iron particles are prevented from being migrated and agglomerated, and a Fe-Nx composite material is obtained; the porous nitrogen-doped carbon material loaded with different forms of iron (such as elemental iron, iron oxide, iron nitride and the like) is obtained. The method is simple in process and low in cost, and the obtained material has high specific surface area and rich active sites and can be widely applied to the fields of supercapacitors, catalysis and the like.

To provide coercivity-enhanced iron nitride nanoparticles with high saturation magnetization.SOLUTION: Iron nitride nanoparticles and magnetic materials formed from iron nitride nanoparticles are described. The iron nitride nanoparticles have a core and shell morphology. The shell provides means to nitride the core. The magnetic materials have an Msat greater than about 160 emu / g and a coercivity greater than about 700 Oe.SELECTED DRAWING: Figure 1-2

The disclosure describes techniques for forming nanoparticles including Fe16N2 phase. In some examples, the nanoparticles may be formed by first forming nanoparticles including iron, nitrogen, and at least one of carbon or boron. The carbon or boron may be incorporated into the nanoparticles such that the iron, nitrogen, and at least one of carbon or boron are mixed. Alternatively, the at least one of carbon or boron may be coated on a surface of a nanoparticle including iron and nitrogen. The nanoparticle including iron, nitrogen, and at least one of carbon or boron then may be annealed to form at least one phase domain including at least one of Fe16N2, Fe16(NB)2, Fe16(NC)2, or Fe16(NCB)2.

This invention relates to a material with a high-temperature microwave absorbing and heat-insulating coating and its preparation method, belonging to the field of microwave absorbing materials technology. The material with the high-temperature microwave absorbing and heat-insulating coating provided by this invention is prepared by mechanically mixing lanthanum magnesium aluminum oxide (LAMA) powder and samarium iron nitride (SmFeN) powder, and then spraying the mixed powder onto the surface of a substrate using plasma spraying. This invention exhibits good microwave absorption and heat insulation performance even at temperatures ranging from room temperature to high temperatures (20-990℃), with a reflectivity in the 8-12GHz frequency band and a relatively small thickness. The materials and preparation method involved in this invention have simple process steps, generate no harmful or toxic pollutants during the process, and have good environmental compatibility.

Disclosed in the present invention is a preparation method for a micron-sized high-purity α"-Fe16N2 magnetic powder. The preparation method comprises the following steps: 1) sequentially performing high-pressure roller milling, high-energy grinding, and drying treatment on an iron ore concentrate to obtain a micron-sized fine particulate iron oxide powder; 2) performing hydrogen reduction on the micron-sized fine particulate iron oxide powder to obtain a porous active reduced iron powder, wherein the temperature for the hydrogen reduction is controlled within a range of 50ºC below the critical temperature of a reduction transformation pathway; and 3) performing nitriding on the porous active reduced iron powder in an ammonia gas atmosphere to obtain α"-Fe16N2 iron nitride. The method uses an inexpensive iron ore concentrate as a raw material, has a low cost and a simple process, can achieve mass production, and can obtain a micron-sized high-purity α"-Fe16N2 iron nitride powder, which can be then formed by means of a conventional additive manufacturing method to produce a high-performance magnet.

The present invention relates to a sustained-release material and a preparation method therefor, a modified ceramic coating and a preparation method therefor, a non-stick coating, and a cooking utensil. The sustained-release material comprises microspheres having a pore structure and silicone oil filled in the pore structure of the microspheres, wherein the microspheres having a pore structure are formed by a mixed slurry comprising abrasion-resistant particles and a binder by means of spray drying, and the abrasion-resistant particles comprise at least one of ferroferric oxide particles, iron carbide particles, titanium carbide particles, chromium carbide particles, zirconium carbide particles, iron nitride particles, titanium nitride particles, aluminum nitride particles, chromium nitride particles and zirconium nitride particles. By means of the sustained-release material of the present application, the silicone oil in the cooking utensil coating formed by a ceramic coating having the sustained-release material can be slowly released, and the abrasion-resistant particles of the microspheres can effectively resist abrasion and high temperature during cooking, thereby avoiding the loss of silicone oil and ensuring long-lasting non-stickiness.

The invention belongs to the technical field of new energy materials, and particularly relates to an iron nitride / gallium nitride / carbon composite heterostructure material and a preparation method and application thereof. In a protective atmosphere, the iron-containing raw material, the gallium-containing raw material and the nitrogen-containing organic compound are subjected to heat treatment, so that the iron-containing raw material and the gallium-containing raw material are subjected to reduction and nitridation reaction, an iron nitride phase and a gallium nitride phase are formed, meanwhile, a carbon phase is formed, and the iron nitride / gallium nitride / carbon composite heterostructure material is obtained. The nitrogen-containing organic compound is introduced under the inert atmosphere condition, so that the iron source and the gallium source are synchronously subjected to reduction and nitridation reactions in the heat treatment process, in-situ synergistic generation of iron nitride and gallium nitride is achieved, an iron nitride phase and a gallium nitride phase form a heterostructure interface on the nanoscale, and the performance of the device is improved. And a stable composite heterostructure is constructed under the confinement effect of a carbon phase, so that the problems that in the prior art, multi-phase materials are difficult to synergistically form, the interface effect is insufficient, the process condition is harsh and the like are solved.