172 results about "Magnesium nitride" patented technology

The invention discloses an environmental-protection anti-corrosive heat-dissipation powder paint, and a preparation method and application thereof. The environmental-protection anti-corrosive heat-dissipation powder paint comprises the following raw materials in parts by weight: 40-90 parts of matrix resin, 2-40 parts of curing agent, 0.5-10 parts of carbon nanotube, 0.5-2 parts of additive, 0-4.5 parts of hexagonal boron nitride, 0-15 parts of aluminum nitride, 0-10 parts of magnesium nitride, 0-10 parts of silicon carbide and 5-30 parts of pigment and filler. The composition and proportioning of the raw materials of the powder paint disclosed by the invention are scientific and reasonable. The experimental result indicates that the powder paint has the advantages of favorable heat-dissipation effect, high efficacy enhancement rate (higher than 60%) and favorable cooling effect (more than 20 DEG C), and can effectively solve the problem of poor heat-dissipation effect in the high-power electronic product, thereby prolonging the service life of the electronic product. The powder paint disclosed by the invention is free of organic solvent, and is environment-friendly and safe; the powder paint disclosed by the invention also has favorable comprehensive properties, such as flexibility, hardness, adhesive force and the like, and stable chemical properties; and the coating formed by the powder paint has the advantages of high corrosion resistance and shock resistance, favorable insulation property and wide application range.

A light emitting diode structure including a substrate, a strain-reducing seed layer, an epitaxial layer, a first electrode and a second electrode is provided. The strain-reducing seed layer having a plurality of clusters is disposed on the substrate, and the material of the clusters is selected from a group consisting of aluminum nitride, magnesium nitride and indium nitride. The epitaxial layer includes a first type doped semiconductor layer, a light emitting layer and a second type doped semiconductor layer. The first electrode is disposed on the exposed first type doped semiconductor layer and electrically connected thereto. The second electrode is disposed on the second type doped semiconductor layer and electrically connected thereto.

The invention discloses a preparation method of a magnesium oxide-mesoporous carbon composite material. The method is characterized by comprising the following steps: oxidizing the surface of a carbon material by adopting mesoporous carbon as a carrier, so that the carbon material is more likely to adsorb a metal salt solution; eliminating water impurities in pores in a vacuum drying box, so that the pores are adequately opened; adding a magnesium nitride solution onto the carbon material to be completely absorbed; and roasting the carbon material under the inert gas after the solution is completely volatized, so that the magnesium nitride is decomposed into magnesium oxide to be remained in the pores of the mesoporous carbon. The magnesium oxide-mesoporous carbon composite material prepared by the method is high in specific surface area and high in magnesium oxide loading capacity; when being applied to the carbon dioxide adsorption at a high temperature, the magnesium oxide-mesoporous carbon composite material has the following good properties: the adsorption capacity of CO2 at the temperature of 50 to 80 DEG C and the pressure of 0.1MPa to 0.2MPa is 2.0 to 2.5 mmol/g, the adsorption agent can be reduced and regenerated at the temperature of 350 to 500 DEG C, and the magnesium oxide-mesoporous carbon composite material is a CO2 adsorption material with a promising application prospect.

A structure and a fabrication method for a nitride semiconductor device are provided so that the device has a lower defect density resulted from incompatible lattice constants between its constituent layers. The nitride semiconductor device contains a substrate, at least a first intermediate layer made of aluminum-gallium-indium-nitride (Al_1-x-yGa_xIn_yN) at least a second intermediate layer made of silicon-nitride (Si_iN_j) or magnesium-nitride (Mg_mN_n), and a nitride epitaxial layer. The second intermediate layer is used to form a mask so that the subsequent epitaxial growth would have a smaller defect density and a better epitaxial quality.

A metal-ceramic composite (“cermet”) has been produced by a chemical reaction between a lithium compound and another metal. The cermet has advantageous physical properties, high surface area relative to lithium metal or its alloys, and is easily formed into a desired shape. An example is the formation of a lithium-magnesium nitride ceiniet by reaction of lithium nitride with magnesium. The reaction results in magnesium nitride grains coated with a layer of lithium. The nitride is inert when used in a battery. It supports the metal in a high surface area form, while stabilizing the electrode with respect to dendrite formation. By using an excess of magnesium metal in the reaction process, a cermet of magnesium nitride is produced, coated with a lithium-magnesium alloy of any desired composition. This alloy inhibits dendrite formation by causing lithium deposited on its surface to diffuse under a chemical potential into the bulk of the alloy.

A semiconductor light-emitting device including a P-type semiconductor cladding layer, an N-type semiconductor layer, a light-emitting layer, and a hole injection layer is provided. The P-type semiconductor cladding layer is doped with magnesium. The light-emitting layer is disposed between the P-type semiconductor cladding layer and the N-type semiconductor layer. The hole injection layer is disposed between the P-type semiconductor cladding layer and the light-emitting layer. The hole injection layer includes a first super lattice structure formed by alternately stacking a plurality of magnesium nitride layers and a plurality of semiconductor material layers. The chemical formula of each of the semiconductor material layers is Al_xIn_yGa_1-x-yN, and 0≦x≦1, 0≦y≦1, and 0≦x+y≦1.

The present invention relates to ion mobility spectrometry, in particular to methods and devices for generating and delivering of ammonia gas as dopant into the ionization region of an ion mobility spectrometer. It provides an ion mobility spectrometer (IMS) with an ion source and device for generating ammonia gas, wherein the device comprises a dopant reservoir filled with alkali metal nitride or alkaline earth metal nitride, preferably lithium nitride and/or magnesium nitride, said reservoir being fluidly coupled to the ion source and to a water reservoir.

The invention discloses an ultraviolet LED and a manufacturing method therefor. According to the technical scheme, a p type hole injection layer comprises a plurality of superlattice layer period units stacked in a first direction, wherein each superlattice layer period unit comprises an aluminum nitride layer, at least one magnesium nitride layer and at least one gallium nitride layer; the magnesium nitride layer and the gallium nitride layer are both positioned on one side, deviating from a substrate, of the aluminum nitride layer; at least one of the two opposite surfaces of the magnesium nitride layer in the first direction is adjacent to the gallium nitride layer. At least one of the two side surfaces of the magnesium nitride layer is adjacent to the gallium nitride layer, so that more Ga atoms can be distributed around Mg atoms by virtue of the abovementioned setting, and the activation energy of the Mg acceptor can be greatly lowered, thereby improving the hole concentration ofa p type doped Al<X>Ga<1-X>N material.

The invention discloses an amino magnesium nano-particle product which can be used as hydrogen storage materials and a preparation method thereof. Nano magnesium nitride is prepared by the method of arc heating and is aminated to obtain Mg (NH2)2 particle product with particle size which is 50-200nm. The nano Mg(NH2)2 particle of the method has high purity and has excellent hydrogen absorption and desorption kinetic properties when used as the hydrogen storage materials, and therefore has very significant application value and wide application prospect in the technical field of hydrogen storage.

The invention discloses a lignin modified activated carbon adsorbent which is prepared from the following raw materials in parts by weight: 20-25 parts of rice husk, 20-25 parts of bamboo charcoal, 6-9 parts of potassium chloride, 2-3 parts of cerium oxide, 0.5-1 part of ammonium persulfate, 6-9 parts of powdered pumice, 8-10 parts of diatomite powder, 100-120 parts of activated carbon powder, 10-13 parts of attapulgite, 3-5 parts of magnesium nitride, 10-14 parts of lignin, 4-5 parts of modified diatomite and a suitable amount of water. By virtue of high-temperature carbonization of the rice husk, a thin pore structure can be easily formed, and activated carbon with more-developed pores and better adsorptive property can be prepared; by use of powdered pumice, the pores of the activated carbon can be increased; by use of the diatomite powder and attapulgite, antibacterial property, deodorization, moisture absorption, mould prevention as well as catalytic decomposition of organics can be realized; by use of the lignin, the cohesive force is improved, so the lignin modified activated carbon adsorbent is less in possibility of being disintegrated, and is safe and environment-friendly. The lignin modified activated carbon adsorbent disclosed by the invention is suitable for dust desorption.

The invention discloses a special heat dissipation electrostatic spraying coating for an LED lamp. The heat dissipation electrostatic spraying coating is prepared from the following raw materials: epoxy resin, polyurethane, unsaturated polyester resin, maleic anhydride, methyl tetrahydrophthalic anhydride, m-phthalic anhydride, 2,4,6-tri(dimethylamine methyl) phenol, trimethylolpropane, 2-butyl-2-ethyl-1,3-propylene glycol, magnesium nitride, modified carbon nano tube, graphene, nano calcium carbonate, cerium oxide, silica powder, hexamethyl-disilazane, phenyltrimethoxysilane, phenyl methyl dimethoxysilane, dibutyltin dilaurate, a leveling agent and benzoin, wherein the epoxy resin is a mixture of biscyclopentadiene dioxide epoxy resin and o-cresol formaldehyde epoxy resin. The heat dissipation electrostatic spraying coating is high in heat dissipation property and high in high temperature resistance, and the service life of the LED lamp can be prolonged.

The invention discloses a preparation method of a light emitting diode epitaxial wafer and a light emitting diode epitaxial wafer, belonging to the field of semiconductor technology. The preparation method comprises the following steps of: providing a substrate; sequentially growing a buffer layer, an N-type semiconductor layer, an active layer, a low-temperature P-type layer and a high-temperature P-type layer on the substrate, wherein the growth temperature of the low-temperature P-type layer is lower than the growth temperature of the high-temperature P-type layer, at least one of the low-temperature P-type layer and the high-temperature P-type layer is a superlattice structure, ,the superlattice structure comprises a plurality of sub-layers stacked in sequence, and each of the sub-layers is formed by continuously passing an indium source, a gallium source, an ammonia gas and a carrier gas to form an indium gallium nitride layer; stopping the injection of the indium source and the gallium source, and simultaneously continuing to inject the ammonia gas and the carrier gas, and processing the indium gallium nitride layer; injecting a magnesium source while ammonia and a carrier gas are continuously injected to form a magnesium nitride layer on the indium gallium nitride layer. The invention can improve the concentration of holes in the superlattice structure.

The invention discloses a niobium and tungsten alloy. The niobium and tungsten alloy comprises the raw materials including, by weight, 100-102 parts of niobium, 14-16 parts of tungsten carbide powder, 5-7 parts of zirconium, 1-3 parts of tin, 1-3 parts of iridium, 5-7 parts of hafnium carbide, 1-3 parts of titanium carbide, 2-4 parts of tantalum carbide, 2-4 parts of ytterbium oxide, 1-3 parts of sintered aluminum, 1-3 parts of aluminum nitride, 1-3 parts of magnesium nitride, 1-3 parts of silicon dioxide, 1-3 parts of yttrium oxide and 2-4 parts of boron carbide. The niobium and tungsten alloy is high and good in strength.

The invention discloses an efficient heat-radiating powder coating comprising the following components in parts by weight: 40-90 parts of polypropylene, 2-40 parts of carbon nano-tubes, 0.5-2 parts of additives, 0-4.5 parts of hexagonal boron nitride, 0-15 parts of aluminum nitride, 0-10 parts of magnesium nitride, 0-10 parts of silicon carbide and 5-30 parts of pigment and filler. The efficient heat-radiating powder coating is good in heat radiating effect, high in efficiency increasing rate (more than 60%), high in cooling effect (more than 20 DEG C) and capable of effectively solving the problem of poor heat radiating effect of a high-power electronic product and prolonging the service life of the electronic product.

The invention discloses a photoelectric detector based on a magnesium nitride film and a preparation method thereof, which belongs to the field of semiconductor photoelectric detectors. The preparation method comprises the steps of firstly, growing a layer of transition metal electrode on a substrate by adopting a magnetron sputtering or evaporation technology; using a wet etching technology or adry etching technology to prepare an interdigital electrode structure ; then growing an Mg3N2 thin film on the substrate with the prepared interdigital electrode structure by adopting a reaction radiofrequency magnetron sputtering method; and finally growing a BN or AlN thin film as an Mg3N2 protective layer on the Mg3N2 thin film in an in-situ sputtering manner, so as to obtain the photoelectricdetection device based on the Mg3N2 thin film. According to the invention, the application of Mg3N2 in the field of photoelectric functional materials and devices is expanded; the BN or AlN thin filmnot only effectively inhibits hydrolysis of the Mg3N2 thin film and improves the stability of the Mg3N2 thin film, but also is transparent in infrared, visible light and most ultraviolet bands, and is an ideal optical window of the Mg3N2 photoelectric device.

The invention discloses a super-hard composite sheet with rigid alloy sandwich, which comprises a dual-face super-hard layer and a rigid alloy sandwich, wherein the super-hard layer is composed of artificial diamond or cubic boron nitride, and conjugation agent. The conjugation agent is at least one of aluminium nitride, titanium nitride, molybdenum nitride, nitride magnesium, nitride zirconium, nitride chromium, nitride tungsten, aluminum oxide, cobalt, molybdenum, titanium, iron, aluminum, nickel, copper, tungsten, and chromium. The surface of the rigid alloy sandwich is concave-convex one, which is combined with the super-hard layer via the concave-convex contact faces. The invention uses the concave-convex engaged sandwich structure to improve the bending strength and impact flexibility of the super-hard composite sheet, reduce the consumption of consumption of super-hard material powder, and reduce production cost, thereby expanding the application range of the super-hard composite sheet.

The invention discloses a cementitious capillary crystalline waterproof coating, a preparation method and a using method thereof. The coating comprises the following components in parts by weight: 45-50 parts of 42.5 ordinary Portland cement, 45-50 parts of 70-120 mesh quartz sand, 1.5-2 parts of a dispersible latex powder, 2-2.5 parts of capillary crystalline masterbatch, 0.1-0.2 part of hydroxypropyl methylcellulose, and 0.2-0.3 part of an organosilicone antifoaming agent, wherein the capillary crystalline masterbatch comprises the following raw materials in percent by weight: 30-55% of barium oxide, 10-15% of magnesium nitride, 5-10% of chromium sulfate dodecahydrate, 5-10% of copper sulfate, 15-20% of magnesium sulfate, and 10-15% of maleic acid-acrylic acid copolymer sodium salt. Thewaterproof coating is applied to the surface of a concrete structure, and capillary crystallization is carried out with water, so that impermeability of the concrete is improved; dormancy is carried out without water, and thereby the coating has secondary impermeability; cracks of 0.4 mm or less on the concrete surface can be repaired; the coating is high temperature resistant and freeze-thaw resistant; a coating layer is solid, and subsequent engineering construction without an additional protective layer can be directly performed on the coating layer; and the coating is non-toxic and environment-friendly, and has air-permeability.

The invention discloses a method for realizing gallium nitride p-type doping based on Mg ion implantation and a high-temperature annealing process. The method comprises the steps of performing Mg ionimplantation and high-temperature annealing on a GaN material; adopting the Mg ion implantation and high-temperature annealing processes compatible with a silicon process, and combining the application of a gallium nitride surface protective layer, protecting the surface of gallium nitride from being decomposed while Mg acceptor impurities are activated at high temperature and gallium nitride crystal lattices are repaired, so that the p-type doping of gallium nitride is realized. The first protective layer introduced in the ion implantation process is a multi-layer composite media composed ofone or more of aluminum nitride, aluminum gallium nitrogen, magnesium nitride, magnesium oxide and silicon nitride, and the deposition mode is at least one of metal organic compound chemical vapor deposition, low-pressure chemical vapor deposition, plasma enhanced chemical vapor deposition or atomic layer deposition.

The invention relates to a process for preparing magnesium nitride through an airflow method. The process comprises the following steps: placing Mg powder into a ceramic boat; sending the ceramic boat to a tube furnace; sealing the tube furnace; introducing ammonia gas for 10 to 15 min for displacing air in the tube furnace to avoid an influence of air on test results; keeping a temperature for 40 to 80 min in ammonia gas atmosphere when the temperature of a tube thermostatic furnace achieves 600 to 610 DEG C; ammonifying for 50 to 70 min through opening an ammonia gas valve with an ammonia gas flow of 400 to 600 ml/min when the temperature of the tube thermostatic furnace gradually achieves three specific values of 750 DEG C, 800 DEG C, and 850 DEG C; and carrying out natural cooling on the ceramic boat in the tube furnace after nitridation. The process of the present invention allows any additive not to be needed, operation to be simple, product purity to be guaranteed, synthesis efficiency to be high, a case that the process is more economical and has a higher production efficiency than processes adopting nitrogen to be realized, technology to be easily control, and low nitridation temperature, less energy consumption, short production period, and uniformity of product particles to be realized.

The invention relates to a high-nitrogen composite ceramic sprue cap for casting aluminum alloy. The sprue cap is made from silicon nitride, aluminium nitride, titanium dioxide, silicon dioxide and magnesium nitride through pre-forming and sintering. The silicon nitride, the aluminium nitride, the titanium dioxide, the silicon dioxide and the magnesium nitride are taken as raw materials, so that the nitride proportion in the manufactured ceramic sprue cap is large, and the sprue cap has excellent strength, toughness, high temperature resistance, corrosion resistance and non-sticky aluminum performance. The high-nitrogen composite ceramic sprue cap is suitable for casting of aluminum alloy.

The invention provides an organic electroluminescent device which comprises an anode conductive substrate, an organic light emitting functional layer, a cathode layer and a packaging layer; wherein the anode conductive substrate, the organic light emitting functional layer, the cathode layer and the packaging layer are successively laminated. The packaging layer comprises an organic barrier layer and inorganic barrier layer which are successively laminated. The organic barrier layer is made of a Hydrogenated carbon nitrogen compound. The inorganic barrier layer is made of an alkaline earth metal nitride. The alkaline earth metal nitride is beryllium nitride, magnesium nitride, calcium nitride, strontium nitride or barium nitride. The packaging layer of the organic electroluminescent device has high obstruction for oxygen and water vapor and furthermore has a high stress releasing function. After packaging, the lowest water vapor transmission rate of the organic electroluminescent device after packaging is only 4.50*10<-6>g/m<2>*day, and the service life is more than 14800 hours (T70@1000cd/m<2>. The invention further provides a preparation method for the organic electroluminescent device. The preparation method is particularly suitable for packaging a flexible organic electroluminescent device.

The invention relates to a lamp radiating material, and particularly relates to a high-heat conductivity temperature-resistant aluminum-based composite radiating material for an LED (Light-Emitting Diode) and a production method thereof. The radiating material is prepared from the following raw materials in parts by weight: 63-65 parts of aluminum, 15-18 parts of iron, 4-5 parts of magnesium nitride, 5-8 parts of vanadium diboride, 1-2 parts of zirconium diboride, 4-5 parts of ferrochrome slag, 8-10 parts of parts of gold ore tailings, 1-3 parts of propanetriol, 1-2 parts of triethanolamine, 0.5-0.8 part of boric acid, 12-14 parts of organic chelated titanium and 4-5 parts of auxiliary agents. The radiating material disclosed by the invention integrates the advantages of components, namely the aluminum, the iron, the vanadium diboride, the gold ore tailings and the like, has good heat-conducting property and insulating property and can be used for enhancing the resource utilization ratio by removing impurities contained in the gold ore tailings and the ferrochrome slag by carrying out soaking treatment on the gold ore tailings and the ferrochrome slag by utilizing a dilute boric acid solution; the radiating material prepared through the production method disclosed by the invention has the advantages of ideal sintering effect, smoothness and compactness of a material surface, stability in temperature change, durability and excellent heat-conduction coefficient and can be used for effectively protecting the LED lamp and greatly prolonging the service life of the lamp.