49results about "Boron/borides" patented technology

This invention provides a boronene-coated sodium-ion battery cathode material and its preparation method, wherein the general chemical formula of the cathode material is Na[Ni]. a Fe b Mn c O2@BL (0 < a < 1, 0 < b < 1, 0 < c < 1, a + b + c = 1). This cathode material is uniformly coated with borene, effectively improving its air stability. The preparation method first involves growing a monolayer of borene on a copper surface using chemical vapor deposition, then obtaining a borene film using a wet transfer process. Finally, the borene film is mixed with the cathode material, vacuum-sealed, and sintered in a muffle furnace, ensuring the borene film is firmly coated onto the cathode material surface. This technology fully utilizes the unique cage-like structure, good conductivity, and high hydrogen content of borene materials. Introducing a borene coating layer onto the cathode material surface not only enhances its air stability but also improves its cycle life, rate performance, and energy density.

The invention discloses a PTC ceramic material and a preparation method thereof, and relates to the technical field of PTC, and the PTC ceramic material is prepared from the following components: 50-65 parts of barium titanate, 12-16 parts of lead tetraoxide, 0.1-0.3 part of yttrium oxide, 0.1-0.3 part of lanthanum oxide, 6-15 parts of modified silicon boride, 4-10 parts of aluminum oxide, 1-3 parts of ammonium polyacrylate, and 3-6 parts of polyvinyl alcohol. Through synergistic cooperation of a barium titanate main body and functional fillers such as modified silicon boride, leap-type improvement of the comprehensive performance of the PTC ceramic material is realized, on the basis of maintaining excellent PTC characteristics, the heat conductivity coefficient and the breaking strength of the material are effectively improved, the thermal shock resistance and the mechanical reliability are remarkably enhanced, and the PTC ceramic material has good application prospects. The method is especially suitable for the high-end application fields of automotive electronics, industrial control, high-power LED driving and the like.

The invention discloses a monatomic doped M-B-C material and a preparation method and application thereof.The preparation method comprises the following steps that metal boride, hydrogen peroxide and graphene are mixed according to a certain proportion, and the obtained mixture serves as a monatomic doped M-B-C precursor; and placing the precursor in a tubular furnace, carrying out annealing reduction in an Ar-H2 atmosphere, heating to a set temperature, carrying out heat preservation, and finally cooling to obtain the monatomic doped M-B-C material. The monatomic doped M-B-C material has a layered structure, and metal atoms are highly dispersed, so that the monatomic doped M-B-C material shows excellent battery performance.

To provide a method and an apparatus that enable rehydrogenation after hydrogen release of borohydride composed of (HB)n(n≥4) as a hydrogen storage material so that the borohydride can be used repeatedly and the rehydrogenation can be performed without using a heating process.SOLUTION: A method for using a hydrogen storage material includes a rehydrogenation step of placing a hydrogen desorbed boron given by hydrogen being desorbed from borohydride composed of (HB)n(n≥4) under pressurized hydrogen of 4 MPa or more, whereby hydrogen is recombined with the hydrogen desorbed boron to form the borohydride. The rehydrogenation can be carried out without using a heating process. An exemplary embodiment of the hydrogen storage material is a hydrogen storage material supported on a bendable resin carrier.SELECTED DRAWING: Figure 2

Embodiments relate to methods and processes for purification of lithium containing brines by selectively separating boron containing compounds. The method includes passing a feed brine including lithium and at least one boron compound through at least one semi-permeable membrane in which the boron compounds are separated from the lithium by preferentially passing the boron compounds through the membrane stage(s). At least one environmental condition of the feed brine and / or membrane stage(s) may be modified to allow boron compounds to be preferentially passed through the membrane stage(s). The lithium-rich concentrate stream may be further purified and / or converted into lithium products, while the resultant boron-rich permeate stream (including the separated boron containing compounds) may be further processed.

The utility model discloses a preparation device for high-purity boron. The preparation device comprises a reaction furnace, a fixed electrode, a movable electrode, an elastic piece and a heating wire. The reaction furnace has a heating cavity; the fixed electrode and the movable electrode are respectively connected to two opposite ends of the reaction furnace and extend into the heating cavity; the movable electrode can reciprocate along the length direction of the reaction furnace; the elastic piece is arranged between the reaction furnace and the movable electrode and is used for providing an acting force for keeping the movable electrode away from the fixed electrode; the two ends of the heating wire are connected with the fixed electrode and the movable electrode respectively. With the adoption of the preparation device, after the heating wire is heated to expand, the elastic piece can drive the movable electrode to be far away from the fixed electrode, so that the heating wire is kept straight and is prevented from being bent and shaken, the high-purity boron crystal deposited on the heating wire is prevented from being broken or falling off, and the defects of fault, non-uniform thickness and the like of the high-purity boron crystal are avoided; the product quality is improved.

The invention discloses a preparation method of two-dimensional boron hydride alkene, and belongs to the technical field of preparation of two-dimensional nano materials. The method comprises the following steps: dispersing metal boride and purified hydrogen type ion exchange resin in an organic solvent with a DN value of less than 19, and carrying out a sealed reaction under the protection of inert gas; according to the method, through the synergistic effect of the low-DN-value solvent and the purified resin, the ion exchange efficiency is effectively improved, competitive adsorption is avoided, the yield of the two-dimensional boron hydride is made to exceed 70%, and the method is mild in reaction condition, easy and convenient to operate, environmentally friendly and suitable for large-scale preparation.

The present invention relates to a method of preparing composite particles comprising contacting a plurality of particles in a reaction zone with a gas comprising at least 25% by volume of a silicon-containing precursor at a temperature effective to cause deposition of silicon within the pores of the porous particles, wherein during the contacting step, a controlled temperature differential is maintained between the maximum temperature of the interior surface of the reaction zone and the minimum temperature within the plurality of porous particles at the same time.

Methods and assemblies for diffusion-based boriding as provided. The methods include accounting for faster immersion of a sample by applying an additional power to heat the electrolyte prior to immersion and applying a negative bias voltage to the sample to mitigation or eliminate oxidation. A fixture including a sample holder to apply the negative bias voltage is also provided.

A crosslinked adhesive composition comprising: (i) a polymer; (ii) solid particles embedded within the polymer; and (iii) a multiplicity of boronate linkages crosslinking between the polymer and solid particles, wherein the boronate linkages have the formula (I), wherein the polymer and particles are connected to each other through the boronate linkages, and the crosslinked adhesive composition has an ability to bond surfaces and a further ability to thermally debond and rebond the surfaces. Also described herein is a method of bonding first and second surfaces together, the method comprising placing the above-described crosslinked adhesive composition onto the first surface and pressing the second surface onto the crosslinked adhesive composition on the first surface.

The invention discloses a method for preparing a silicon isotope and a boron isotope. The method comprises the following steps: purifying boron powder through a pretreatment process to obtain high-purity boron powder; vacuumizing the reactor to-0.08 MPa to-0.09 MPa, then introducing inert gas to replace air in the reactor, and carrying out reduction reaction on the high-purity boron powder and the high-purity silicon tetrafluoride gas rich in silicon-28 in the reactor to obtain a crude silicon-28 isotope product; the method comprises the following steps: removing impurities from a crude silicon-28 isotope product through plasma zone melting to obtain a silicon-28 isotope product, removing excessive silicon tetrafluoride from generated boron trifluoride gas through a low-temperature rectification process, preparing boron-10 and boron-11 isotopes, and returning the excessive silicon tetrafluoride to a system for recycling. The one-step coupling preparation technology of the silicon and boron isotopes is developed, the silicon-28 isotopic, the boron-10 isotope and the boron-11 isotope are prepared at the same time, efficient directional conversion of the silicon and boron isotopes is achieved, the production cost is further reduced, and the economic benefits of the process are remarkable.

The invention provides a borane-coated sodium ion battery positive electrode material and a preparation method thereof. The chemical general formula of the positive electrode material is Na [NiaFebMnc] O2 (at) BL (a is greater than 0 and less than 1, b is greater than 0 and less than 1, c is greater than 0 and less than 1, and a + b + c = 1). The surface of the positive electrode material is uniformly coated with boron alkene, so that the air stability of the material is effectively improved. The preparation method comprises the following steps: growing a single layer of boron alkene on the surface of metal copper by adopting a chemical vapor deposition method, transferring by utilizing a wet method to obtain a boron alkene thin film, mixing the boron alkene thin film and the positive electrode material, vacuumizing, and heating and sintering in a muffle furnace, so that the boron alkene thin film is firmly coated on the surface of the positive electrode material. According to the technology, the advantages of unique cage-shaped structure, good conductivity and high hydrogen content of the Boron-Hash material are fully utilized, and the Boron-Hash coating layer is introduced to the surface of the positive electrode material, so that the air stability of the material can be enhanced, and the cycle life, the rate capability and the energy density of the material can be improved.

The present invention relates to a method for producing an oxide-based solid electrolyte powder. A method for producing an oxide-based solid electrolyte powder, according to one embodiment of the present invention, comprises the steps of: vibrating an aqueous precursor solution containing Li2CO3, H3BO3, Al2O3, and LiCl to generate fine droplets; a step of spraying fine liquid droplets; a step for generating a powder by heating the sprayed fine droplets; and a step for collecting the generated powder.

The invention discloses elemental boron B60, a preparation method thereof and a preparation method of Na4B60. The boron elementary substance B60 disclosed by the invention is characterized in that the crystal structure of the boron elementary substance B60 belongs to an Ima space group, a structural framework of each unit cell is formed by four B12 icosahedrons on average, and gaps among the four B12 icosahedrons are filled with the rest 12 B atoms. The invention also relates to a preparation method of the boron simple substance B60, which comprises the step of synthesizing the boron simple substance at 400-1000 DEG C under a vacuum condition by using Na4B60 as a raw material. The invention also relates to a preparation method of the Na4B60, which comprises the step of enabling a boron simple substance, a sodium simple substance and a zinc simple substance to react at the pressure of 0.5 GPa or higher and the temperature of 1000 DEG C or higher to obtain the Na4B60. The method is simple in process, low in cost and suitable for large-scale production. The obtained boron simple substance has the advantages of high purity, narrow optical band gap, high conductivity, high nanoindentation hardness and unique plastic deformation capacity, and has application potential in the fields of electronic devices, high-temperature ceramics and the like.

To provide a simple method for producing boron powder with reduced oxygen content.SOLUTION: A method for producing boron powder comprises a step of heat-treating a boron powder raw material in a hydrogen distribution atmosphere at a temperature of 1000°C or higher.SELECTED DRAWING: None

The invention relates to a solid material obtainable by melt quenching a mixture of lithium sulfide, boron sulfide, boron oxide and a lithium halide to form a glassy solid suitable for use as a lithium ion conductive electrolyte. These sulfide-based lithium ion conductive solid electrolytes exhibit high ionic conductivity.

The invention relates to a continuous separation production device for 10B isotope, which comprises a complexing tower for complexing a complexing agent and boron trifluoride and providing tower top reflux for an exchange tower group; the falling film cracking reactor is used for cracking the boron trifluoride-anisole complex, separating to obtain enriched < 10 > BF3 and providing tower bottom reflux for the exchange tower group; the exchange tower group is used for exchanging, enriching and separating < 11 > B in boron trifluoride and < 10 > B in boron trifluoride in a complex; and the natural abundance boron trifluoride gas raw material channel is laterally communicated with the tower bottom of the first exchange tower. The connection of the exchange towers in the device is relatively special, the liquid phase of the device flows according to the cross flow of 1-3-2-4 of the exchange towers, the effect of increasing the abundance gradient of liquid-phase and gas-phase 10B isotopes between the exchange towers is achieved, the chemical exchange mass transfer driving force is improved, the separation efficiency is improved, the balance time is shortened, and the separation efficiency is improved. The abundance of the obtained 10B isotope is higher, and the maximum abundance reaches 97% or above.

The present disclosure addresses the problem of providing: a hydrogen boride-containing sheet production method with which it is possible to obtain a hydrogen boride-containing sheet larger than conventional products; and a hydrogen boride-containing sheet.　The hydrogen boride-containing sheet production method according to an embodiment of the present disclosure comprises: bringing a metal boride into contact with an ion exchange material to obtain hydrogen boride; and heating a mixed liquid containing the obtained hydrogen boride and a liquid medium on a substrate to form a hydrogen boride-containing sheet on the substrate.　The hydrogen boride-containing sheet according to an embodiment of the present disclosure has a length of at least 100 μm in at least one direction.

The invention relates to a process for preparing composite particles, the process comprising contacting the plurality of particles in the reaction zone with a gas comprising at least 25 vol % of a silicon-containing precursor at a temperature effective to cause deposition of silicon in the pores of the porous particles. A controlled temperature differential between the maximum temperature of the internal surfaces of the reaction zone and the simultaneous minimum temperature within the plurality of porous particles is maintained during the contacting step.

Methods for growing a single crystal ingot using a freeze dried dopant include adding semiconductor material to a crucible of an ingot puller, heating the semiconductor material to form a melt, adding a freeze dried dopant to the melt, and pulling a single crystal ingot from the melt. A doping concentration of the single crystal ingot is controlled using the freeze dried dopant.

The invention provides a combined extraction process of boron, rubidium and cesium in oilfield brine, which adopts a process enhanced coupling extraction method, solves the problem of packing blockage of a traditional extraction tower by using supergravity, enhances liquid-liquid two-phase mass transfer and shortens the retention time of fluid, thereby simplifying the traditional extraction process and realizing the unification of short process and high extraction rate. The process realizes separation and extraction of boron, cesium and rubidium elements in the oil field brine lithium extraction tail liquid, and has the characteristics of long service life of equipment, low process flow cost, easiness in industrialization and environmental protection.

Methods of synthesizing orthorhombic-structure closo-hydroborate include mixing orthorhombic-structure closo-hydroborate precursors with low shear mixing to form a precursor mixture, placing the precursor mixture in a reaction vessel with an inert environment, heating the precursor mixture to a reaction temperature for the precursor mixture, and quenching the reaction vessel from the reaction temperature. The resulting orthorhombic-structure closo-hydroborate has ionic conductive stability at 25°C. Cathode composites that include the orthorhombic- structure closo-hydroborate therein are disclosed as well as solid-state batteries or all-solid-state batteries that have the orthorhombic-structure closo-hydroborate made according to the methods as a solid electrolyte and / or as part of the cathode composite.

The invention relates to a process for preparing composite particles, the process comprising contacting the plurality of particles in the reaction zone with a gas comprising at least 25 vol % of a silicon-containing precursor at a temperature effective to cause deposition of silicon in the pores of the porous particles. A controlled temperature differential between the maximum temperature of the internal surfaces of the reaction zone and the simultaneous minimum temperature within the plurality of porous particles is maintained during the contacting step.

The present invention relates to solid materials which are obtainable by melt-quenching mixtures of lithium sulphide, boron sulphide, boron oxide and lithium halides, thereby forming a glassy solid which is suitable for use as a lithium-ion conducting electrolyte. These sulphide based lithium-ion conducting solid electrolytes exhibit a high ionic conductivity.

The utility model discloses a reduction furnace for monomer boron production, which belongs to the technical field of monomer boron production, and comprises a furnace body, a stirring mechanism is arranged at the top of the furnace body, a through groove is formed in the outer side of the furnace body, two screw rods are rotatably connected to an inner cavity of the furnace body, an inner baffle is sleeved between the two screw rods in a threaded manner, and the inner baffle is connected with an outer baffle in a threaded manner. The end face of the inner baffle is fixedly connected with a movable base. According to the boron melting furnace, the lead screw, the first motor, the inner baffle, the moving seat and the outer baffle are used in cooperation, the moving seat extends out of the inner cavity of the furnace body through cooperation between the lead screw and the inner baffle, and therefore monomer boron generated after reaction in the reaction box on the moving seat is taken out, and at the moment, the side face of the moving seat and the inner wall of the penetrating groove are attached and sealed; and the outer side face of the inner baffle and the inner wall of the furnace body are attached and sealed, hot air in the furnace body is prevented from overflowing, heat in the furnace body is prevented from hurting workers, and practicability is good.

The application discloses a high-entropy boride-coated cobalt-free high-nickel layered positive electrode material and a preparation method and application thereof, and belongs to the technical field of preparation of lithium ion battery positive electrode materials. First, the high-entropy boride prepared by the above method is mixed, stirred and high-temperature sintered with the cobalt-free high-nickel layered positive electrode material to obtain the high-entropy boride-coated cobalt-free high-nickel layered positive electrode material. The high hardness, high stability and excellent electrochemical performance of the high-entropy boride can avoid direct contact between the positive electrode material and electrolyte, reduce the occurrence of side reactions, effectively relieve the volume change of the cobalt-free high-nickel ternary positive electrode material during the charging process, reduce the intracrystalline and intercrystalline cracks, eliminate the trace surface residual lithium of the cobalt-free high-nickel layered positive electrode material, reduce the surface acidity and alkalinity of the material, and the material is used in a lithium ion battery, so that the initial discharge capacity and cycle stability of the battery are improved.

The application belongs to the technical field of sodium ion batteries, and particularly relates to a sodium ion battery composite positive electrode material and a preparation method thereof. The preparation method comprises the following steps: dissolving soluble nickel salt, iron salt and manganese salt in an ammonia water solution, adjusting pH to 11-12, heating and reacting under a nitrogen atmosphere, and obtaining an oxide precursor after filtration, washing and drying; adding sodium carbonate, the oxide precursor, modified silicon hexaboride and niobium sulfoselenide into ethanol, ball-milling and mixing, drying, calcining and cooling to obtain the sodium ion battery composite positive electrode material. The sodium ion battery composite positive electrode material prepared by the application has high specific capacity, good rate performance and excellent cycle stability.

This process for extracting boron contained in an aqueous solution comprising rare earth elements, consists of bringing said aqueous solution into contact and mixing it with an organic solvent, said organic solvent comprising at least one extraction compound consisting of an alcohol, comprising a chain of 6 to 18 carbon atoms, aliphatic or aromatic, linear or branched, bringing the aqueous solution and the organic solvent into contact and mixing it resulting in the transfer of boron from said aqueous solution to said organic solvent.

The application belongs to the technical field of lithium purification, and relates to a method for comprehensive development and utilization of magnesium sulfate sub-type salt lake resources, which comprises the following steps: adjusting the SO4 2‑ concentration and the molar ratio of Mg 2+ , SO4 2‑ in the composition of brine to be treated to preferentially precipitate K + and realize concentration and enrichment of lithium and boron elements in the salt lake brine. The application can make the brine directly precipitate potassium salt during concentration by controlling the SO4 2‑ concentration and the molar ratio of Mg 2+ , SO4 2‑ , realize separation of potassium element from the brine, and avoid precipitation of lithium element in the form of lithium sulfate by controlling the SO4 2‑ concentration in the composition of the salt lake brine, thereby improving the purity of potassium salt and the subsequent lithium element yield, solving the problem of loss of lithium in the form of lithium sulfate precipitate when the brine with a molar ratio of Mg 2+ , SO4 2‑ <4 is collected in the prior art, and the process does not need to remove magnesium, so that the loss of boron element is small, and effective recovery of boron element is realized.

The invention discloses a preparation method of a boron nano material, and relates to the technical field of metallurgy and chemical industry. According to the method, aluminum boron, an aluminum-titanium intermediate alloy and pure aluminum are subjected to a high-temperature smelting reaction in a smelting furnace, and then the boron nano material can be obtained in an alloy system through an acid leaching method; the adopted raw materials are aluminum boron, aluminum titanium intermediate alloy and pure aluminum which are commonly used in the industry, and are low in cost and easy to obtain; the synthesized boron nano material is high in purity and standard in morphology, and can be tubular, sheet-shaped, cage-shaped, angular and the like; the preparation method is non-toxic and can be used for batch industrial production; due to unique physical and chemical properties, the boron nano material has wide application potential in the fields of reinforced composite materials, thermal management, radiation shielding, biomedicine, energy storage, high-temperature structural materials, optical application and the like.