54results about How to "Improved lattice structure" patented technology

The invention discloses a multi-element mixed doping and coating modified ternary positive electrode material and a preparation method thereof. According to the lattice structure characteristics of ternary positive electrode materials, two kinds of metal ions with different ionic radii are doped selectively by multi-element mixed doping method. One kind of metal ions with lithium ion radius equalto or close to lithium ion radius can reduce the cation mixing and discharging. The other kind of metal ions with the same or close radius as transition metal ions (Mn4 +, Co3 +) can reduce the polarization and enhance the electrochemical performance. At that same time, a protective layer is coated on the surface of the ternary positive electrode material by a secondary sinter process to prevent the dissolution of transition metal ions on the surface of the ternary positive electrode material, thereby the ternary positive electrode material with excellent rate performance and cycling performance is prepare. The method is simple in process, convenient in operation and good in reproducibility, and is suitable for large-scale industrial production.

Atomic Layer Deposition (ALD) is used for heteroepitaxial film growth at reaction temperatures ranging from 80-400° C. The substrate and film materials are preferably selected to take advantage of Domain Matched Epitaxy (DME). A laser annealing system is used to thermally anneal deposition layers after deposition by ALD. In preferred embodiments a silicon substrate is overlaid with an AIN nucleation layer and laser annealed. Thereafter a GaN device layers is applied over the AIN layer by an ALD process and then laser annealed. In a further example embodiment a transition layer is applied between the GaN device layer and the AIN nucleation layer. The transition layer comprises one or more different transition material layers each comprising a AlxGa1-x compound wherein the composition of the transition layer is continuously varied from AIN to GaN.

A support for structural components that are subjected to a thermal treatment process. The support includes a frame having limbs and extending therefrom a grid of intersecting strands. In order to prevent the support from warping even when subjected to strong thermal loads or variations in temperature, the frame is produced from a temperature-resistant material and the strands are produced from carbon fibers or ceramic fibers that form the grid, extending from the limbs of the frame.

Atomic Layer Deposition (ALD) is used for heteroepitaxial film growth at reaction temperatures ranging from 80-400° C. The substrate and film materials are preferably matched to take advantage of Domain Matched Epitaxy (DME). A laser annealing system is used to thermally anneal deposition layer after deposition by ALD. In preferred embodiments, a silicon substrate is overlaid with an AlN nucleation layer and laser annealed. Thereafter a GaN device layer is applied over the AlN layer by an ALD process and then laser annealed. In a further example embodiment, a transition layer is applied between the GaN device layer and the AlN nucleation layer. The transition layer comprises one or more different transition material layers each comprising a AlxGa1-xN compound wherein the composition of the transition layer is continuously varied from AlN to GaN.

The invention relates to a preparation method of an ecological security flocculating agent for effectively removing phosphorus and algae in a eutrophic water body. The preparation method comprises the following steps of preparing materials, uniformly mixing original clay with water to obtain clay suspension, adjusting the basicity to 50-90% by dropping dilute acid into the clay suspension, uniformly mixing aluminium polychlorid powder with water to prepare aluminium polychlorid solution, adjusting the basicity to 50-90% by dropping dilute acid or dilute alkali into the aluminium polychlorid solution, pouring the aluminium polychlorid solution into the clay suspension, standing and curing at 50-80 DEG C to obtain curing solution, drying the curing solution at 50-80 DEG C, and crushing and sieving to obtain the flocculating agent. According to the invention, the removal rate of total phosphorus is 93% or more; the removal rate of CODCr is 53% or more; the removal rate of total nitrogen is also above 3%; the removal rate of water-blooming cyanobacteria is 96% or more; the removal rate of algal toxin MC-LR is 7% or more; and the risk in rapidly releasing algal toxin is not caused.

The invention discloses a method for preparing a graphene radiating fin, comprising the steps: adding graphite oxide to deionized water, adding a dispersing agent, and performing stirring, shaking orultrasonicizing to prepare an aqueous graphene oxide solution; placing a polyimide film in a carbonization furnace, introducing an inert gas, and then performing carbonization treatment; coating the carbonized polyimide film with the aqueous graphene oxide solution to obtain a graphene oxide-polyimide film; placing the graphene oxide-polyimide film in a graphitization furnace, introducing an inertgas, and then performing graphitization treatment; and rolling the the film obtained by the graphitization treatment to obtain a graphene radiating fin. According to the invention, a graphene radiating fin with excellent heat dissipation performance can be prepared by adopting a technology of combining graphene oxide with a carbonized polyimide film, the process is easy to control, and the purityis high.

The invention discloses a large-size graphene stack structure wafer which is characterized in that a wafer structure comprises a graphene single crystal layer, an h-BN (hexagonal boron nitride) single crystal layer, an h-BN buffer layer and SiO2 / Si wafer substrates from the top down sequentially. The wafer and the preparation method have the benefits that the wafer can be compatible with a production technique of the available silicon substrate semiconductor device sufficiently, and can take full advantage of the characteristic of a hexagonal boron nitride substrate material; growing graphene has a most perfect crystal structure and a carrier transport environment with the weakest scattering; the super-high mobility of carriers in graphene is kept at the utmost; and the performance of a graphene substrate electronic device is improved greatly.

The invention discloses a preparation method of titanium dioxide hollow nanospheres. The preparation method comprises the following steps: firstly, taking tetraethyl orthosilicate as a silicon sourceand preparing silicon dioxide microspheres by adopting a Stobe method; then cladding the surfaces of the silicon dioxide microspheres with a titanium dioxide precursor; then removing a silicon dioxideinner core by adopting strong alkali corrosion; finally, carrying out calcination and hydrothermal treatment to prepare anatase form titanium dioxide hollow nanospheres. The invention further discloses the titanium dioxide hollow nanospheres prepared by the preparation method provided by the invention. The method disclosed by the invention is simple to operate, low in production cost, small in process pollution, high in product yield, good in repeatability and suitable for large-scale production. A titanium dioxide nano-product prepared by the method has the advantages of high purity, good crystallization, controllable crystal form, fine particle granularity, uniform particles, good monodispersity, small particle size, large specific surface area and high photocatalytic activity.

The invention discloses a preparation method of a graphene heat dissipating fin, which comprises the following steps: adding graphite oxide into deionized water, adding a dispersant, and preparing an aqueous graphene oxide solution by stirring, oscillating or ultrasonic wave; coating a substrate by the aqueous graphene oxide solution, drying the aqueous graphene oxide solution to obtain a graphene oxide film, and peeling the graphene oxide film off the substrate; irradiating the stripped graphene oxide film by laser to reduce graphene oxide to obtain a graphene film; placing the graphene film in a carbonization furnace for carbonization treatment; rolling the carbonized graphene film to obtain the graphene heat dissipating fin. The graphene heat dissipating fin having excellent heat dissipation performance can be prepared by reducing graphene oxide by laser and carbonizing the graphene oxide, and the process is easy to control and has high purity.

The lithium nickel manganese oxide positive electrode material, the preparation method thereof and the electrochemical device are characterized in that the lithium nickel manganese oxide positive electrode material provided by the embodiment of the invention comprises a base material and a coating layer located on the surface of the base material, the general formula of the base material is Li (LiaNixMnyMbO4), the element M comprises at least one of Ti, Zr, Al, Nb and Mo, and a is more than or equal to 0.02 and less than or equal to 0.06; 0.45 < = x < = 0.55, 1.4 < = y < = 1.6; 0.05 < = b < = 0.55; a + x + y + b = 2, and the coating layer contains phosphate. According to the lithium nickel manganese oxide positive electrode material, through doping and coating technologies, under the condition that the capacity is not sacrificed, the gas production phenomenon is effectively reduced, the cycling stability of the lithium nickel manganese oxide positive electrode material is improved, and the service life of an electrochemical device applying the lithium nickel manganese oxide positive electrode material is prolonged.

The present invention provides a semiconductor device, including a substrate, a first semiconductor layer, a plurality of first sub recess, a plurality of insulation structures and a first top semiconductor layer. The substrate has a first region disposed within an STI. The first semiconductor layer is disposed in the first region. The first sub recesses are disposed in the first semiconductor layer. The insulation structures are disposed on the first semiconductor layer. The first top semiconductor layer forms a plurality of fin structures, which are embedded in the first sub recesses, arranged alternatively with the insulation structures and protruding over the insulation structures.

The invention discloses a porous titanium-tantalum-niobium-zirconium stent for bone defect repair. The porous titanium-tantalum-niobium-zirconium stent contains, by weight, 55%-65% of titanium, 1%-5%of tantalum, 30%-35% of niobium and 2%-6% of zirconium; the porous titanium-tantalum-niobium-zirconium stent has a regular porous structure, pores are completely communicated, the pores are 300-500 microns, and the porosity is 78.3 + / - 1.6%. The elastic modulus of the porous titanium-tantalum-niobium-zirconium stent is 2.27-18.96 GPa. The porous titanium-tantalum-niobium-zirconium stent has the effect of promoting bone defect repair. The regular porous structure and the completely communicated pores facilitate the growth of a new bone into a material, and a better osseointegration effect is obtained. The pores of 300-500 microns and the porosity of 78.3 + / - 1.6% promote cell adhesion, promote the healing of bone defects and the growth of bone tissues.

A method for reducing series resistance for transistors includes forming a conductive gate over and insulated from a semiconductor substrate, forming source and / or drain extension regions within the substrate and adjacent to respective source and / or drain regions, and forming source and / or drain regions within the substrate. The source and / or drain extension regions are formed from a material alloyed with a first dopant and a second dopant, the first dopant configured to increase a lattice structure of the material forming the source and / or drain extension regions.

The invention belongs to but not limited to the technical field of electrode materials, and particularly relates to a high-tap-density lithium nickel manganese oxide positive electrode material, a preparation method and a lithium ion battery, the chemical general formula of the high-tap-density lithium nickel manganese oxide positive electrode material is LiNi < 0.5-x > Mn < 1.5-y > M < x > N < y > O < 4 >, 0.1, 0 < = y < lt >; 0.1, M and N are doping elements and comprise one or more of Mg, Co, Al, Zr, W, Sb, Ta and Ti; the material is micron-sized spherical secondary particles formed by stacking and aggregating nano-sized octahedral primary particles, and is uniformly dispersed without agglomeration; the spherical secondary particles are formed by mixing spherical secondary particles with large and small particle size distribution, and the average particle size range of the large particles is 3lt; d < 50lt >; the average particle size range of the small particles is 1lt; d < 50lt >; 2 [mu] m.

The invention relates to a selenium and silicate co-doped high-nickel cathode material, and a preparation method and application thereof. The cathode material is a selenium and silicate co-doped modified high-nickel cathode material, and has a chemical formula of LiNixM1-xSea (SiO4) bO2-a-b, wherein M is at least one of Mn, Co or Al, and 0.5 <= x < 1, 0 < a <= 0.05, 0 < b <=0.05. The high-nickel cathode material is doped with low-valence anions by the selenium and silicate so as to improve the lattice structure of the material. The selenium and the silicate have good synergistic effect, can improve the structural stability of the material under high voltage, and obviously improve the electrochemical performance of the high-nickel cathode material. The obtained cathode material has a firstcycle discharge specific capacity greater than or equal to 185mAh / g and a capacity retention rate greater than or equal to 85% after 200 cycles at a 2.5-4.2V voltage window and 0.1C current density, and has a good application prospect.

The invention relates to a preparation method for a cubic indium oxide single-crystal epitaxial film. By adopting the organic metal chemical gas deposition technology, trimethylindium is used as an organic metal source, nitrogen is used as carrier gas, oxygen is used as oxidizing gas and an organic metal chemical gas deposition device is used to epitaxially grow indium oxide single-crystal film on an yttrium-doped zirconia substrate under vacuum conditions. The film is the epitaxial material with single-crystal structure, twin crystals and domain structures do not exist in the film, and the mobility of the current carrier of the film is higher than 61.2 cm<2>V<-1>s<-1>.

The invention discloses a method for preparing near-infrared cadmium telluride quantum dots through hydrothermal treatment. The method comprises the following steps: respectively adding a cadmium saltsolution and a sulfydryl ligand into an aqueous solution, and performing uniform mixing so as to obtain a mixed solution, wherein the mole ratio of the sulfydryl ligand to the cadmium salt is (2-4):1; adjusting the pH value of the mixed solution to 9-11, introducing nitrogen for 30 minutes or longer, adding a sodium hydrogen telluride aqueous solution, and performing uniform mixing so as to obtain a cadmium telluride precursor solution, wherein the mole ratio of the cadmium telluride to cadmium ions is (0.1-0.2):1; heating the cadmium telluride precursor solution for 5 minutes, adding a precipitant, performing centrifugation, removing supernate, adding water, and performing secondary dissolution; adding the cadmium salt solution and the sulfydryl ligand into the dissolved cadmium telluride quantum dots, wherein the mole ratio of thiohydracrylic acid to cadmium chloride is (2-4):1; and adjusting the pH value of the mixed solution to 9-11, and performing heating for a certain time, so as to obtain the cadmium telluride quantum dots with near-infrared light emission. By adopting the method disclosed by the invention, near-infrared cadmium telluride quantum dots can be prepared, and the obtained cadmium telluride quantum dots have good lattice structures.

The invention provides a formation method of a semiconductor device. The formation method of a semiconductor device comprises the steps: providing a substrate with isolation structures; forming a gate structure on the surface of part of the substrate between the adjacent isolation structures; forming a groove exposing the side wall of the isolation structure in the substrate at two sides of each gate structure; nitriding the side wall of the exposed isolation structure, and forming an anti-corrosion layer on the surface of the side wall of the isolation structure; after forming the anti-corrosion layer, cleaning the surface of the bottom and the side wall of the groove; and forming a stress layer filling the groove. The formation method of a semiconductor device can prevent cleaning from etching the isolation structure so as to enable the isolation structure to maintain good shape and provide good interface performance for forming the stress layer, and can enable the isolation structure to maintain good electrical isolation performance and can optimize the electrical properties for the formed semiconductor device.

The invention discloses a positively charged water-soluble cadmium telluride quantum dot preparation method, which comprises: respectively adding a cadmium salt solution and a mercapto ligand to an aqueous solution, and uniformly mixing to obtain a mixed solution, wherein a molar ratio of mercaptopropionic acid to cadmium chloride is 2-4:1; adjusting the pH value of the mixed solution to 9-11, introducing nitrogen for more than 30 min, adding a sodium hydrogen telluride aqueous solution, and uniformly mixing to obtain a cadmium telluride precursor solution, wherein a molar ratio of sodium hydrogen telluride to cadmium ions is 0.1-0.2:1; and diluting the cadmium telluride precursor solution by using an aqueous solution, and heating to obtain the water-soluble cadmium telluride quantum dots. With the method of the present invention, the water-soluble quantum dots can be prepared quickly, the fastest red cadmium telluride quantum dot obtaining time is only 1 h, and the obtained cadmium telluride quantum dots have the good lattice structure.

The invention relates to the field of air hydrogen production, and provides an air hydrogen production material, a preparation method and application. The invention discloses a material for producing hydrogen from air, graphene aerogel and an MOF material, the graphene aerogel can absorb solar energy and convert the solar energy into heat energy, and the MOF material can adsorb water vapor in the air and catalyze a reaction for producing hydrogen under the illumination of the sun. The preparation method of the air hydrogen production material comprises the following steps: preparing a precursor solution containing graphene oxide, a polymer binder and an MOF material as required to form a solid compound, and then carrying out vacuum freeze-drying reduction treatment. The material can adapt to different application scenes, realizes distributed hydrogen production, and is suitable for efficient hydrogen production in diversified environments.

The invention relates to the technical field of mechanochromic materials, and discloses a blue-phase liquid crystal polymer fiber capable of changing color through mechanical response and a preparation method and application of the blue-phase liquid crystal polymer fiber. The blue-phase liquid crystal polymer fiber with the mechanical response color changing function is of a skin-core structure, a skin layer is a blue-phase liquid crystal layer, and a core layer is a polymer fiber monofilament; and the blue-phase liquid crystal polymer fiber can generate color change response under stress change. When an external force is applied to the blue-phase liquid crystal polymer fiber, the lattice constant of the blue-phase liquid crystal is changed, so that the reflection wavelength is changed and the color is changed, and the blue-phase liquid crystal polymer fiber has a reversible color change behavior due to a stable polymer network structure; the preparation method disclosed by the invention is simple in process, and a blue phase structure with a good lattice structure and a large plate can be obtained through rapid cooling; the prepared blue-phase liquid crystal polymer fiber is good in processability and high in performance, and has very good application potential in the fields of sensors, display, stealth and anti-counterfeiting.

Atomic Layer Deposition (ALD) is used for heteroepitaxial film growth at reaction temperatures ranging from 80-400° C. The substrate and film materials are preferably matched to take advantage of Domain Matched Epitaxy (DME). A laser annealing system is used to thermally anneal deposition layer after deposition by ALD. In preferred embodiments, a silicon substrate is overlaid with an AlN nucleation layer and laser annealed. Thereafter a GaN device layer is applied over the AlN layer by an ALD process and then laser annealed. In a further example embodiment, a transition layer is applied between the GaN device layer and the AlN nucleation layer. The transition layer comprises one or more different transition material layers each comprising a AlxGa1-xN compound wherein the composition of the transition layer is continuously varied from AlN to GaN.

The invention discloses a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a conductive glass substrate layer, an electron transport layer, a functional layer, a passivation layer, a hole transport layer and a metal electrode layer which are sequentially arranged from bottom to top, the functional layer is mainly composed of a perovskite light absorption layer I, or a monomer molecule passivation layer and a perovskite light absorption layer II which are sequentially arranged from bottom to top; the perovskite light absorption layer I is formed by coating the electron transport layer with a precursor solution I containing monomer molecules, and the monomer molecule passivation layer and the perovskite light absorption layer II are formed by sequentially coating the electron transport layer with a monomer molecule solution and a precursor solution II without monomer molecules. According to the perovskite solar cell, charge transfer and carrier lifetime are influenced by monomer molecules, so that the open voltage and the filling factor are greatly improved, and finally the photoelectric conversion efficiency of the perovskite solar cell is improved.

The invention relates to a lithium-rich lithium iron phosphate material as well as a preparation method and the application thereof, and belongs to the technical field of materials. The preparation method comprises the following steps: taking lithium iron phosphate as a raw material in the material preparation process, assembling the lithium iron phosphate in a button cell and then performing charge-discharge cycles on the button cell to obtain the lithium-rich lithium iron phosphate material. The lithium-rich lithium iron phosphate material has a micro-nano-scale size, has a good lattice structure, is used for coating an electrode to form a working electrode and constructing an NO electrochemical biosensor; the sensor can be used for the direct growth of cells, can perform real-time in-situ detection on NO molecules released by the cells, shows extremely-high sensitivity and selectivity in the actual detection and is stable in electrochemical property and longer in cycle life. The material is simple and convenient in preparation process, low in raw material cost and convenient for commercial application.

The invention discloses a method for the in-situ preparation of coal-biomass prepared carbon base NOx adsorption reduction catalyst. The catalyst selects specific coal and biomass as a carrier precursor, and selects specific metal as forming accessory ingredient and active ingredient precursor so as to finish technologies including activation, forming and the like in situ in a drop furnace. The prepared catalyst has high NOx adsorption performance, meanwhile, the catalyst can catalyze micromolecule flammable gas (carbon monoxide, methane and the like) to react with NOx, realizing high NOx removal rate. According to the active ingredients of the catalyst, cheap metal is adopted to solve the problems that traditional commercial catalyst has poor replaceability, environment pollution and thelike. Compared with the conventional selective adsorption-catalytic reduction catalyst, the catalyst disclosed by the invention has the following advantages that the coal and biomass mixed material isadopted as the carrier precursor so as to omit alkali metal or alkaline earth commonly used by the NOx adsorption catalyst. The catalyst has the advantages of high nitric oxide adsorption performance, high adsorption performance and high NOx catalytic reduction performance (98% or above).

The invention discloses a large-size graphene stack structure wafer which is characterized in that a wafer structure comprises a graphene single crystal layer, an h-BN (hexagonal boron nitride) single crystal layer, an h-BN buffer layer and SiO2 / Si wafer substrates from the top down sequentially. The wafer and the preparation method have the benefits that the wafer can be compatible with a production technique of the available silicon substrate semiconductor device sufficiently, and can take full advantage of the characteristic of a hexagonal boron nitride substrate material; growing graphene has a most perfect crystal structure and a carrier transport environment with the weakest scattering; the super-high mobility of carriers in graphene is kept at the utmost; and the performance of a graphene substrate electronic device is improved greatly.

A two-dimensional non-Hofmann type coordination polymer based on K2[Hg(SCN)4] and flexible bidentate sulfur-based pyridine ligand, which is formed by a neutral two-dimensional network of {Fe[Hg(SCN)4](L)} n (L represents bis (4-pyridylthio) methane). The preparation method is: the aqueous solution of K2[Hg(SCN)4], the ligand L and the methanol solution of FeCl2 are sequentially placed in a three-arm H-shaped tube, sealed and placed in dark for two weeks to obtain yellow maple leaf-shaped crystals. The advantages of the present application are: the non-Hofmann type structure of the complex provides sufficient adsorption sites, the bonding force between the sulfur element in the bridging ligand and the mercury ion serves as the adsorption driving force, so that the adsorption rate of the complex is stably maintained at 38±2% under the test conditions that the concentration of HgCl2 is 50-8500 ppm, when the concentration of HgCl2 reaches 8500 ppm, the adsorption amount of mercury ion per milligram of complex reaches 4.25 mg, and the complex maintains a good crystal lattice structure before and after adsorption, and has potential application value in the aspects of green chemical industry, clean chemical process production and the like.

The invention discloses a making process of peanut-flavored sauce capable of being used with a sauce gun. The making process comprises the following steps: through the scientific formula combination,after heating and stirring and mixing uniformly, controlling the cooling speed and temperature through a unique pipeline cooling process and controlling the packaging temperature time, filling the product into a special triangular bag, thereby making the product form a stable lattice structure to obtain the peanut-flavored sauce which is appropriate in softness and hardness, and conveniently usedwith the sauce gun. The product is convenient to use and accurate in use amount control, and standardized control of the product is realized.

A forming method of a semiconductor structure comprises the following steps: providing a substrate; forming a first electromagnetic film on the substrate; forming a tunnel film on the surface of the first electromagnetic film; performing heat treatment on the first electromagnetic film and the tunnel film by adopting a first heating process; and after the first electromagnetic film and the tunnel film are subjected to heat treatment, forming a second electromagnetic film on the surface of the tunnel film. Therefore, the performance of the magnetic tunnel junction is improved.