166 results about "Boron containing" patented technology

A boron-containing polyethylene glycol fatty acid ester surfactant belongs to the field of organic chemistry and functional materials. The boron-containing polyethylene glycol fatty acid ester surfactant is prepared as follows: polyethylene glycol (PEG), boric acid and fatty acid are used as raw materials, first esterification reaction of the PEG and the boric acid is performed, then esterification reaction of the PEG and the fatty acid is performed to obtain boron-containing poly ethylene glycol fatty acid ester; by changing the species of fatty acids and catalysts and molecular weight of the PEG, the esterification rate can be enhanced, the boron-containing poly ethylene glycol fatty acid ester product can be used as a surfactant, and the boron-containing poly ethylene glycol fatty acid ester can reduce water surface tension and has good emulsifying properties.

The invention discloses a boron-containing copper-based three-dimensional metal organic framework material as well as a preparation method and application thereof, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: preparing Zn-based MBON from zinc salt, boric acid and imidazole through a hydrothermal method, and then completely replacing the zinc component with copper to obtain Cu-based MBON, namely the boron-containing copper-based three-dimensional metal organic framework material. The specific surface area of the material is large, and a three-dimensional nano flower-shaped unique structure is formed. The prepared material is used as a catalyst for furfural electro-hydrogenation and carbon dioxide reduction reaction, the diffusion efficiency of reactants (such as furfural and CO2) can be enhanced, rapid desorption of products (such as furfuryl alcohol and ethylene) can be promoted through the surface capillary action, meanwhile, generation of by-products caused by excessive reaction is inhibited, and the selectivity of target products is improved.

The invention discloses an argillaceous sandstone uranium ore leaching method and device based on a recyclable activation material, and relates to the technical field of uranium ore resource development. The preparation method of the recyclable activated material comprises the following steps: adding WS2 and Fe3O4 into an aqueous solution, uniformly stirring, adding a boron-containing compound, a fluorine-containing precursor aqueous solution and a nitrogen-oxygen-containing compound, uniformly stirring, heating, stirring for reaction, filtering, washing and drying to obtain a precursor; and calcining the precursor in a protective atmosphere to obtain F / O co-doped h-BN / WS2 / Fe3O4 which is used as a recoverable activation material. The obtained recoverable activated material has good catalytic performance, can be widely applied to preparation of a catalyst for leaching uranium from argillaceous sandstone uranium ore, and can generate strong turbulence, secondary circulation and near-wall shear force for high-viscosity ore pulp and efficiently excite the catalytic activity of a piezoelectric material in cooperation with the device provided by the invention.

The embodiment of the invention discloses a composite shielding plate and a preparation method thereof, and the composite shielding plate comprises a cladding which is provided with an accommodation space, and the accommodation space is in a vacuum state; the shielding material is arranged in the accommodating space; wherein the shielding material comprises a neutron moderation base material, and the cladding is made of a boron-containing metal material; or the shielding material comprises a neutron moderation base material and a neutron absorption base material, the cladding is made of a metal material, the neutron moderation base material comprises rare earth hydride, and the neutron absorption base material comprises boron-containing ceramic. The composite shielding plate provided by the embodiment of the invention not only comprises the neutron moderation base material which is high in hydrogen content and excellent in temperature resistance so as to effectively moderate fast neutrons, but also is combined with the neutron absorption base material containing boron atoms so as to efficiently absorb thermal neutrons, so that the complete neutron moderation-absorption integrated shielding performance of the composite shielding plate is realized; and stable shielding performance can be provided at the temperature of 300-1000 DEG C.

The invention belongs to the technical field of organic electroluminescence, and particularly relates to a boron nitrogen-phosphorus oxygen skeleton fused series compound and an organic electroluminescence device.A phosphorus oxygen unit is introduced into a boron / nitrogen type multiple resonance thermal activation delayed fluorescence skeleton through a one-step phosphorus oxygen post-modification method, metal does not need to participate in the synthesis route, the yield is high, and the method is suitable for industrial production. A universal strategy is provided for expanding the structural diversity of an MR-TADF system, the provided multi-resonance type thermally activated delayed fluorescent material containing fusion of the boron, nitrogen and phosphorus oxygen frameworks has the characteristic of wide color gamut emission, and an organic electroluminescent device prepared by using the material as a luminescent material realizes wide color gamut and narrow spectrum TADF emission and has wide application prospects. And the electroluminescent device has relatively low efficiency roll-off, and is an organic luminescent functional material with good performance.

The invention belongs to the technical field of nuclear physics and particle accelerators, and relates to a high-precision wide-energy-spectrum neutron source target body structure applied to a spallation neutron source device. The method comprises the following steps: a tungsten target is adopted, and a 6cm thin target design is adopted; the cooling layer contains boron water and the like and can be used for cooling and slowing down neutrons; the moderation layer moderates the neutron energy spectrum to a thermal neutron energy region by using boron-containing water; the shielding layer is made of low-carbon steel and concrete to ensure radiation safety; the tail end of the neutron channel is connected with an experimental terminal; according to the thin target design, the energy resolution is improved, the energy resolution of neutrons below 100 keV is higher than 0.1%, and the energy resolution of neutrons below 1 MeV reaches 0.3%; the boron element reduces the gamma ray background; and the five neutron pore channels meet various requirements. The overall design realizes the effect required by the high-precision neutron experiment and improves the precision of the device.

The invention relates to a moderator of a compact single-ball neutron spectrometer, and the moderator is characterized in that an inner layer is of a cylindrical structure, and a plurality of thermal neutron detectors are installed in the inner layer; the thermal neutron absorption layer sleeves the outer side of the inner layer and is made of boron-containing polyethylene; the scattered neutron moderation layer sleeves the outer side of the thermal neutron absorption layer; the inner layer comprises a detector placing block and a thermal neutron absorption block, and the thermal neutron absorption block is provided with a storage groove; a plurality of thermal neutron detectors are placed in the detector placement block along the axis direction, the first thermal neutron detector is placed in the storage groove, and the thermal neutron absorption block is made of boron-containing polyethylene; the diameter of the inner layer is 8 cm, the outer diameter of the thermal neutron absorption layer is 14 cm, and the outer diameter of the scattered neutron moderation layer is 20 cm. The purposes that the size is controlled by controlling the diameter of the cylindrical structure and the scattering shielding effect is enhanced by arranging the three layers of moderator structures in a sleeving mode are achieved, and therefore the technical effects that the moderator is small in size, convenient to transport and high in scattering shielding effect are achieved.

This invention relates to an 8.8 grade boron-containing cold heading steel wire rod and its production method. The process involves rolling, wire drawing, hot coiling, and slow cooling in a holding tunnel furnace. The wire drawing temperature is controlled at 900-950℃. After wire drawing, the wire rod is conveyed to the coiling process under holding conditions. The coiling temperature is 800-850℃. During slow cooling in the holding tunnel furnace, the furnace entry temperature is controlled at 720-770℃. The cooling rate of the coil in the 700-600℃ temperature range is ≤0.1℃ / s, and the exit temperature is ≤500℃. Utilizing the residual heat of the coil in the holding tunnel furnace for slow cooling results in a higher ferrite content and online softening of the microstructure. This effectively reduces the tensile strength and hardness of the boron-containing cold heading steel wire rod while improving its plasticity. The wire rod can achieve a tensile strength ≤450MPa, a reduction of area ≥58%, and a hardness ≤75HRB. It can be used for the non-annealing production of 8.8 grade nuts and other large deformation fasteners.

The present invention belongs to the technical field of quantum dots, and specifically to a boron-containing quantum dot composite aggregate and a preparation method therefor and use thereof. The boron-containing quantum dot composite aggregate includes a tricoordinate boron-containing quantum dot composite and a tetracoordinate boron-containing quantum dot composite conforming to Formula I and Formula II formed by chemically bonding a boron-containing compound and quantum dots, wherein the boron-containing compound in the tricoordinate boron-containing quantum dot composite is linked to the quantum dots by covalent bonds, the boron-containing compound in the tetracoordinate boron-containing quantum dot composite is linked to the quantum dots by coordination bonds, and a proportion of the number of X-B coordination bonds in the boron-containing quantum dot composite aggregate is 0.10%-50% of a sum of the number of X-B covalent bonds and the number of X-B coordination bonds. The boron-containing quantum dot composite in the present invention can have relatively strong binding capacity and oxidation resistance, and good heat resistance, which facilitates improving stability of the quantum dots, meanwhile ensures excellent optical performance, and effectively avoids appearance of black and yellow spots.

The present invention provides a method for forming a boron-containing diamond film (MPCVD method) that does not use a boron-containing gas G1 as a boron doping element source. [Solution] A method for producing boron-containing diamond films using the MPCVD method, in which a film-forming gas G0 is supplied from a film-forming gas inlet S0, an exhaust gas G2 is discharged from an exhaust port E, and boron-containing diamond is deposited on a substrate P0, characterized in that the film-forming gas G0 is supplied from a film-forming gas inlet S0 and a boron-containing quartz part 95 constituting a quartz injection head 90 is used as a boron doping element source.

The application belongs to the technical field of building materials, and specifically discloses a kind of nuclear power use radiation-proof boron-containing cement and its preparation method.Nuclear power use radiation-proof boron-containing cement, by weight parts, includes the following raw materials:portland cement 325-342 parts, boron nitride 115-128 parts, fine river sand 650-662 parts, water 226-238 parts.The nuclear power use radiation-proof boron-containing cement prepared in the application has good strength and tensile strength, and a certain amount of portland cement, boron nitride, fine river sand is set, and the components can significantly improve the compressive strength and durability of the nuclear power use radiation-proof boron-containing cement.

The invention relates to the technical field of cold heading steel wire rod production, in particular to a non-annealing boron-containing cold heading steel wire rod and a production method thereof. The wire rod comprises the following chemical components in percentage by weight: 0.31%-0.33% of C, less than or equal to 0.05% of Si, 0.70%-0.90% of Mn, less than or equal to 0.010% of P, less than or equal to 0.010% of S, 0.02%-0.06% of Al, 0.0010%-0.0025% of B, 0.20%-0.30% of Cr, 0.015%-0.040% of Ti, less than or equal to 0.0050% of N and the balance of Fe and inevitable impurities. The structure of the wire rod is composed of ferrite and pearlite, the content of the ferrite is not lower than 55% according to the area, the grain size of the ferrite is 10-25 micrometers, the percentage reduction of area is not lower than 60%, the hardness is not higher than 85 HRB, the hardness range in the circumferential direction is not larger than 20 HV, and the production cost of the wire rod is reduced.

The invention discloses a boron-doped porous silicon-carbon composite material and a preparation method thereof.The preparation method comprises the following steps that S1, silicon dioxide, a solid carbon source and boron-containing particles are subjected to high-energy ball milling, and a mixed product A is obtained; s2, mechanically mixing the mixed product A with magnesium powder to obtain a mixed product B; s3, putting the mixed product B into a reactor, roasting for 6-9 hours at 600-1000 DEG C under an inert condition, and naturally cooling to obtain a mixed product C; and S4, sequentially carrying out acid pickling on the mixture C in dilute acid and hydrofluoric acid, then cleaning with pure water and absolute ethyl alcohol, and carrying out centrifugal drying to obtain the boron-doped porous silicon-carbon composite material. The method is simple in process and low in raw material cost, and the prepared boron-doped porous silicon-carbon composite material is high in conductivity and good in cycling stability.

The invention discloses a method for preparing a ceramic frit from electronic waste. The ceramic frit is prepared from the following raw materials in parts by mass: 40-55 parts of waste electronic glass, 15-27 parts of polishing powder, 8-10 parts of waste aluminum oxide, 6-8 parts of waste desulfurized gypsum, 3-6 parts of a boron-containing modifier, 5-8 parts of waste fuel and 1-3 parts of a mineralizing agent. The method comprises the following steps: stirring and mixing waste electronic glass, polishing powder, waste aluminum oxide, waste desulfurized gypsum, a boron-containing modifier and a mineralizer, adding waste fuel, further stirring and mixing, and then feeding into a granulator for granulation; feeding the prepared particles into a smelting furnace for calcining, wherein the calcining temperature is 1050-1150 DEG C; and carrying out water quenching molding on the molten material to obtain the ceramic frit. The method for preparing the ceramic frit from the electronic waste solves the technical problems of high energy consumption of ceramic frit calcination and resource waste caused by direct treatment of the electronic waste in the prior art.

The present invention relates to a novel photoluminescent composite comprising a BODIPY moiety covalently bonded to a blue light absorbing moiety, and a color conversion film and a backlight unit using the same.

The present invention provides a pretreatment method for detecting boron impurities in high-purity quartz sand. The pretreatment method comprises adding hydrofluoric acid, nitric acid, and a hydroxyl-containing polymer to the high-purity quartz sand to form a boron-containing complex with chitin, followed by heating and volatilization to obtain a crude boron-containing residue. The crude boron-containing residue is rinsed with ultrapure water to remove impurities, thereby obtaining a refined boron-containing residue. The hydroxyl-containing polymer is chitin, chitosan, chitosan, or cellulose. The present invention avoids the loss of boron due to volatilization in the sample, and the prepared refined boron-containing residue is suitable for various instrumental measurement methods, such as solid sampling or solution sampling.

The present invention addresses the problem of reducing the coefficient of thermal expansion of a polyimide film having a high coefficient of thermal expansion. This film contains a polyimide and an oxide containing a boron element. In addition, the boron-containing oxide is preferably obtained from boric acid and an alumina sol. Further, the film preferably has a coefficient of thermal expansion of 50 ppm / DEG C or less. Further, the film preferably exhibits a light transmittance of 74% or more at a wavelength of 420 nm. Further, the film preferably shows a yellowness (YI) of 6.0 or less. Further, it is preferable that the film exhibit a thermal conductivity in the range of 0.231 W / mK or more and 0.275 W / mK or less.

The invention belongs to the technical field of organic photoelectric materials, and provides a boron-nitrogen-containing multi-element heterocyclic ring material and an organic electroluminescent device comprising the same. The boron and nitrogen-containing multi-element heterocyclic ring material provided by the invention is a brand-new sensitized material and doped material with a boron and nitrogen six-element heterocyclic ring at the center of a molecular skeleton and a multi-benzene ring structure. The structure has good stability, and can inhibit molecular vibration relaxation and reduce non-radiative transition, thereby achieving a good service life. Meanwhile, the material has good high exciton utilization rate and small delta EST, intersystem crossing can be achieved more easily, and better photoelectric conversion efficiency is achieved.

Components and methods for forming the components are provided that promote adherence of environmental barrier coatings to surfaces of the components. The components include a substrate formed of a SiC—SiC composite that includes boron, a surface of the substrate that has a concentration of the boron that is reduced relative to a remainder of the substrate, and an environmental barrier coating disposed on the surface of the substrate. The methods include providing the SiC—SiC composite, performing a pretreatment process on a portion of the surface of the component to reduce the concentration of the boron at the surface, and forming the environmental barrier coating on the surface.

Provided in the present application are a non-stoichiometric high-entropy boron-containing carbide powder, a preparation method therefor and the use thereof. The powder comprises a substance having a molecular formula of XCyBz, wherein the X element is selected from at least four of Zr, Hf, Ti, Ta, Nb, V and W, 0.6≤y＜1.0, 0＜z＜0.4 and y+z≤0.96. The powder has a single-phase face-centered cubic structure, a particle size of ≤1μm, and an oxygen content of not more than 0.2 wt%. The powder provided by the present application has the characteristics of high-temperature resistance and high oxidation resistance, and thus can be used for preparing high-density, oxidation-resistant and ablation-resistant ceramic blocks or coatings.

The invention belongs to the technical field of radioactive substance transportation, and particularly relates to a transportation container compatible with neutron source rods of multiple specifications, the transportation container comprises a barrel body (1) and a shock absorber (6), the barrel body (1) comprises an outer barrel (12) and an inner sleeve (13), the outer barrel (12) is of a hollow barrel-shaped structure with two open ends, a top end cover plate and a bottom end cover plate are connected with the two ends of the outer barrel (12) respectively, and the inner sleeve (13) is sleeved with the inner sleeve (13). The shock absorbers (6) are arranged on the outer side of the top end cover plate and the outer side of the bottom end cover plate respectively, a plurality of parallel inner sleeves (13) are arranged in the outer cylinder (12) in the axial direction, the cylinder body (1) is of an interlayer structure, and a shielding body (110) and reinforcing rib plates (14) are arranged between the outer cylinder (12) and the inner sleeves (13). The shielding body adopts a segmented filling mode, so that the shielding requirement is met, the use amount of boron-containing polyethylene is reduced to a great extent, and the weight and the manufacturing cost of the container are controlled; due to the double-layer cover plate design, safety is improved, and it is guaranteed that under the normal transportation condition, the content does not leak from an inner cavity of the container.

The invention relates to a rare earth doped high-temperature thermal shock resistant and corrosion resistant coating for plain carbon steel and a preparation method thereof. The coating comprises the following raw materials in percentage by weight: 5-30% of quartz sand, 2-15% of a boron-containing raw material, 1-5% of zinc oxide, 20-40% of a barium-containing raw material, 1-8% of calcium oxide, 0.5-3% of a molybdenum-containing raw material, 1-8% of bentonite, 10-40% of chromic oxide, 5-25% of cobaltous oxide and 2-8% of a rare earth raw material. The rare earth raw material comprises yttrium oxide. The coating is a glass-ceramic composite protective coating and can effectively protect a plain carbon steel substrate, the high-temperature thermal shock resistance and corrosion resistance of the plain carbon steel substrate are remarkably improved, the service life of steel is prolonged, and the comprehensive cost is greatly reduced.

The application discloses a method for reducing the thickness of boron-containing aluminosilicate glass melting material, which comprises the following steps: configuring SiO2, Al2O3, Na2O, K2O, MgO, CaO, B2O3 and ZrO2 in a certain proportion to form a glass batch; configuring mirabilite, carbon powder, water glass and water to form a composite modifier; adding the composite modifier into the glass batch to fully stir and mix, thereby forming an improved batch; preheating the improved batch in a quartz crucible; after preheating to a certain temperature, putting the improved batch into the quartz crucible; gradually heating the quartz crucible at a certain heating rate; accelerating the silicate reaction of the improved batch by the composite modifier; accelerating the melting of B2O3; heating to a predetermined holding temperature; and continuously holding at the holding temperature for a certain time, so that the improved batch is melted to form a glass liquid. The application effectively reduces the thickness of the glass melting material, reduces the volatilization of B2O3 during melting, and improves the content and uniformity of B2O3 in the glass.

The application provides a method for selectively separating and recovering boron from boron-containing aluminosilicate glass, which comprises the following steps: (1) ball milling the boron-containing aluminosilicate glass, slurryizing the material after roasting treatment by adding water, mixing the slurryized material with sulfuric acid, and obtaining a boron-containing leaching solution after pressure acid leaching treatment; (2) adjusting the pH of the boron-containing leaching solution, adding sodium carbonate to carry out magnesium removal treatment, and obtaining a sodium borate solution; (3) carrying out concentration and crystallization treatment on the sodium borate solution, and obtaining borax. The method adopts the processes of ball milling-transformation roasting-pressure acid leaching-carbonation magnesium removal-evaporation crystallization, recovers boron in the form of borax from the glass, synchronously recovers magnesium carbonate as a byproduct, and realizes selective separation and recovery of boron, magnesium and sodium elements in the glass powder.

The invention relates to a method for extracting boron from boron-containing brine based on polyol two aqueous phases, and the method comprises the following steps: (1) uniformly mixing a boron-containing brine solution, a polyol extraction agent and a first salting-out agent, and carrying out first pH value adjustment to obtain a mixed solution A; (2) carrying out extraction separation on the mixed solution A obtained in the step (1) to obtain a boron-loaded polyol solution and raffinate; (3) uniformly mixing the boron-loaded polyol solution obtained in the step (2), a stripping agent and a second salting-out agent, carrying out second pH value adjustment to obtain a mixed solution B, and carrying out stripping separation to obtain a boron-containing stripping solution and regenerated polyol; according to the method, no organic diluent is used in the extraction and back extraction processes, and the method is environmentally friendly, small in phase interfacial tension, high in phase splitting speed and high in extraction efficiency and has the advantages of being easy to operate, green, efficient and the like.

Embodiments of the present invention generally relate to methods of epitaxially growing boron-containing structures. In an embodiment, a method of depositing a structure comprising boron and a Group IV element on a substrate is provided. The method includes heating the substrate at a temperature of about 300° C. or more within a chamber, the substrate having a dielectric material and a single crystal formed thereon. The method further includes flowing a first process gas and a second process gas into the chamber, wherein: the first process gas comprises at least one boron-containing gas comprising a haloborane; and the second process gas comprises at least one Group IV element-containing gas. The method further includes exposing the substrate to the first and second process gases to epitaxially and selectively deposit the structure comprising boron and the Group IV element on the single crystal.

One or more magnetic tunneling junction (MTJ) pillars are disposed on a substrate. The pillars have one or more magnetic reference layers and one or more magnetic free layers. The magnetic free layers have one or more external surfaces and are made of a magnetic free layer material containing atomic percentage amount of boron. A boron-containing encapsulation layer encapsulates the MTJ pillar(s) and is in direct contact with the magnetic free layer external surfaces. The boron-containing encapsulation layer contains an atomic percentage amount of boron greater than the magnetic free layer atomic percentage amount of boron. Embodiments of the boron-containing encapsulation layer contain at least 95 percent pure boron and are between 1 and 3 nanometers thick. Accordingly, the boron-containing encapsulation layer controls and limits the amount of boron diffusing out of the magnetic free layer across a boron diffusion interface formed between the magnetic free layer external surfaces and the boron-containing encapsulation layer. Alternative embodiments of boron-containing encapsulation layers and methods of making MTJ devices are disclosed.

The application discloses a high-efficiency gas deposition process, which uses porous carbon material as a substrate, uses silicon-containing gas, phosphorus-containing gas, nitrogen-containing gas, sulfur-containing gas, boron-containing gas and lithium-containing gas as raw material gas, and deposits nanoparticles in the pores of the porous carbon material after stage-by-stage gas deposition; in the first stage, the temperature in the reactor is controlled to be 300-800 DEG C, the initial pressure is 10-100 KPa, and the flow rate of the raw material gas is 2-15 L / min; when the pressure in the reactor starts to drop, the next stage is entered; in the second stage, the initial pressure in the reactor is adjusted to be 5-25 KPa, the flow rate of the raw material gas is adjusted to be 8-50 L / min; and when the pressure in the reactor starts to rise, the deposition is ended. The deposition process can significantly improve the pore structure utilization rate of the porous carbon substrate and reduce the specific surface area of the porous carbon substrate; the nanoparticles in the prepared product have high deposition amount, and exist in the pores of the porous carbon and are uniformly dispersed.

The invention discloses a boron-containing ZSM-5 molecular sieve and a preparation method thereof. The skeleton of the boron-containing ZSM-5 molecular sieve contains boron, aluminum and silicon, and the absolute value of the difference between the crystal bulk phase silicon-aluminum ratio measured by XRF and the crystal surface silicon-aluminum ratio measured by EDS is less than or equal to 1. The preparation method of the boron-containing ZSM-5 molecular sieve comprises the following steps: mixing a boron source, a first silicon source, a seed crystal and water, performing pretreatment, adding a second silicon source, an aluminum source and an inorganic additive, performing uniform mixing, and performing crystallization, solid-liquid separation, washing, ion exchange and drying to obtain the boron-containing ZSM-5 molecular sieve. According to the invention, the boron-containing ZSM-5 molecular sieve with uniform distribution of aluminum inside and outside the crystal can be prepared in the absence of a template agent and an organic additive.

This invention provides a hardened body utilizing slag containing free MgO, such as steelmaking slag. This hardened body suppresses volume expansion caused by hydration reactions based on free MgO and addresses insufficient strength. The hardened body utilizing slag containing free MgO is manufactured by adding water to a mixture containing slag containing free MgO as a material, kneading the mixture, and then solidifying the mixture. In this hardened body, the unit amount of slag containing free MgO is 2000 kg / m³. 3 The following is the unit weight of alumina cement: 75 kg / m³ 3 Above and 200kg / m 3 The following unit weight of blast furnace slag powder is 330 kg / m³. 3 Above and 530kg / m 3 The following calculations use B2O3 as the unit amount for boron-containing substances, which is 0.5 kg / m³. 3 Above and 4.0 kg / m 3 the following.