195 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 provides a method for measuring silver content in boron-containing water, which comprises the following steps: preparing a blank standard solution and a standard working solution by using a first-stage diluent and a second-stage diluent, and respectively pretreating the blank standard solution, the standard working solution and a to-be-measured sample solution by using a third-stage diluent; the first-stage diluent comprises a nitric acid solution, the second-stage diluent comprises a boron solution, and the third-stage diluent comprises a nitric acid solution; and measuring the silver content of the to-be-measured sample solution by adopting inductively coupled plasma emission spectrometry. According to the determination method provided by the invention, the silver content in the boron-containing water of the nuclear power plant can be accurately and rapidly detected through pretreatment of the test solution, the problem of boron interference in the boron-containing water is solved, the detection accuracy of the silver content is improved, and support is provided for chemical control of nuclear power loop water.

The invention provides an antioxidant graphite material and a preparation method thereof. The preparation method of the anti-oxidation graphite material comprises the following steps: mixing an ester compound containing a boron element with a binder coal pitch, heating and kneading the mixture and coke aggregate (pitch coke or petroleum coke) to form a pasty material, cooling the pasty material, preparing pressed powder, performing isostatic compaction, roasting and graphitizing to obtain the anti-oxidation graphite material. The whole technical route is the same as a large-scale graphite production process of an enterprise and can be directly combined with an existing production process, and the aim of improving the graphitization degree so as to improve the oxidation resistance of the graphite can be achieved without increasing procedures and production cost. Boron and boron in the boron-containing solvent can be distributed in the bulk phase of graphite and reduce the number and reaction activity of carbon active sites, so that the boron-containing solvent is an intrinsic oxidation inhibitor, and the inhibition effect of the bulk phase cannot be affected even if surface loss is caused by abrasion or corrosion.

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 invention relates to an oxygen vacancy-rich modified zero-valent iron / biochar composite material and application thereof. The modified zero-valent iron / biochar composite material comprises a biochar carrier and zero-valent iron loaded on the biochar carrier, the surface of the zero-valent iron is coated with sulfur-containing ferrides and / or boron-containing ferrides, and the surface of the zero-valent iron contains rich oxygen vacancies; the modified zero-valent iron / biochar composite material is specifically prepared by the following steps: dispersing a biochar carrier and zero-valent iron in oxygen-free water, and grinding; adding a sulfur source or a boron source into the ground suspension, fully stirring and grinding, and drying; and soaking in a reducing solution, calcining at high temperature, and cooling to obtain the modified zero-valent iron / biochar composite material. Compared with the prior art, the modified zero-valent iron / biochar composite material prepared by the invention can be synergistically used with a compound oxidant to realize effective remediation of organic contaminated soil.

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 discloses an extrusion production method of a boron-containing seamless steel pipe for shielding nuclear power fuel neutrons. The extrusion production method comprises blank extrusion preparation procedures such as blank outer diameter selection and surface treatment, saw cutting, deep hole, horn mouth and arc machining. The heating temperature and the heating time of a preheating section, a heating section and a soaking section of the annular furnace are set; induction furnace heating: setting the heating temperature, the heating power and the heating time of a primary induction furnace and a secondary induction furnace; the deformation process comprises chambering and extruding, and chambering deformation is a pre-chambering process of extruding deformation. A newly designed tool and die participating in deformation comprises the design of a broaching cone, and the diameter, the cone angle and other key dimensions of the broaching cone are stipulated; design contents such as the diameter of a working belt of the shearing ring and tolerance fit of the outer diameter of the shearing ring are stipulated in the shearing ring design. Through the steps and the design of tools and dies, the seamless steel pipe with the quality meeting the standard requirement is successfully produced on an extruding machine through the material.

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.

The invention relates to the technical field of high-entropy ultrahigh-temperature carbide ceramics, and discloses a boron-containing and nitrogen-containing carbide and a preparation method thereof. The molecular formula of the boron-containing and nitrogen-containing carbide is XCyBzNw, X is at least four of Zr, Hf, Ti, Ta, Nb, V and W, y is more than or equal to 0.6 and less than 1, z is more than 0 and less than or equal to 0.4, w is more than 0 and less than or equal to 0.4, y + z + w is less than or equal to 1, and the boron-containing and nitrogen-containing carbide is a single phase solid solution and has a face-centered cubic structure. The boron-containing and nitrogen-containing carbide provided by the invention has temperature resistance and oxidation resistance of an ultrahigh melting point, and has important potential application in an ultrahigh-temperature thermal protection system.

A method for recovering boron oxide from dust generated in the ferroboron smelting process belongs to the technical field of boron metallurgy and specifically comprises the following steps: in the ferroboron smelting process, high-temperature tail gas is introduced into a cyclone dust collection system and then is fed into a bag dust collection system to obtain boron-containing dust; the preparation method comprises the following steps: taking hexanediol, isooctanol, isoamyl alcohol and butanol as raw materials to prepare mixed polyol; the method comprises the following steps: mixing boron-containing dust with a composite solvent, and then transferring to a stirring reflux device for leaching under a constant-temperature condition; after the leaching is finished, separating by adopting a vacuum filtration mode to obtain a boron-containing solution and primary residues, washing the obtained primary residues by using butanol to obtain a washing solution and secondary residues, and returning the washing solution to the washing process of the primary residues for recycling; carrying out vacuum evaporation on the boron-containing solution to obtain solid-phase diboron trioxide and a solvent, and carrying out vacuum evaporation and condensation on the solvent to obtain a mixed solvent; the solid-phase diboron trioxide is used as a ferroboron smelting raw material, and the mixed solvent is returned to the selective leaching process for recycling.

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 embodiments described herein relate to chemically and mechanically durable glass compositions and glass articles formed from the same. In embodiments, the glass composition may include 74-78 mol. % SiO2; X mol. % Al2O3, wherein X is 5-7; alkaline earth oxide comprising MgO and CaO, wherein: CaO is 0.1-1.0 mol. %; MgO is 4-7 mol. %; and a ratio (CaO (mol. %) / (CaO (mol. %)+MgO (mol. %)) is less than or equal to 0.5. The glass composition may further include Y mol. % alkali oxide, wherein the alkali oxide comprises 9-13 mol. % Na2O and less than or equal to 0.4 mol. % of a fining agent. The glass composition may be free of boron and compounds of boron.

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 relates to a method for measuring the content of boron in a boride. The method specifically comprises the following steps: pretreating a boron-containing compound to obtain a solution to be titrated; titrating the solution to be titrated by using the alkaline titration solution, and measuring the pH value of the solution to be titrated and the volume of the alkaline titration solution in real time in the titration process; drawing a titration curve graph through EXCEL software, and fitting a first straight line; connecting points on two sides of an intersection point of the first straight line and the titration curve and extending to obtain a second straight line; the volume corresponding to the intersection point of the first straight line and the second straight line is the titration end point volume, and the boron content in the boride can be calculated through a formula. The determination method provided by the invention is simple, rapid and less in interference, and improves the accuracy and stability of the test.

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.