26 results about "Magnesium borate" patented technology

According to the low-temperature high-durability magnesium phosphate cement and the preparation method thereof, dead burned magnesia powder serves as a core gelling base material and can provide a large amount of active Mg < 2 + >, ammonium dihydrogen phosphate can provide an acid environment and PO4 < 3->, the dead burned magnesia powder and the ammonium dihydrogen phosphate are subjected to an acid-base neutralization reaction in the presence of water to generate ammonium magnesium phosphate hydration products, and the magnesium phosphate hydration products are subjected to a low-temperature high-durability magnesium phosphate cement. The products are interwoven to form a hardened body framework, and a strength foundation is laid for cement; borax is adopted as a key retarder, borate ions generated after the borax is dissolved in water can be adsorbed on the surfaces of dead burned magnesia powder particles, a magnesium borate complex film is formed, the dissolution of Mg < 2 + > and the reaction of PO4 < 3-> are hindered, the cement setting time is effectively delayed, and the construction requirements are met; and the borax can also refine the crystal structure of a hydration product, reduce the porosity, improve the impermeability and the volume stability of a hardened body, and avoid shrinkage cracking.

The invention discloses a high-insulativity coating treatment method of a metal soft magnetic composite material, which belongs to the technical field of metal soft magnetic materials, and comprises the following steps: firstly, performing vacuum dehydration treatment on metal soft magnetic powder, and controlling the moisture content to be not higher than 0.1%; carrying out ultrasonic dispersion treatment on the boron nitride nanosheets to form a suspension, and modifying the magnesium borate nanowires and a silane coupling agent for later use; preparing an inorganic coating solution and an organic coating solution; activating the powder in the fluidized bed by adopting radio frequency plasma of argon-oxygen mixed gas; enabling the activated powder to enter a three-fluid nozzle fluidized bed reactor, and implementing synchronous spray coating in two stages: in the first stage, spraying inorganic coating liquid and applying pulse plasma to form a composite bottom layer; in the second stage, spraying organic coating liquid and carrying out ultraviolet precuring to form a resin layer; and the coated powder is treated by a stepped thermocuring procedure to obtain a finished product. The technical problem of how to improve the insulation coating performance of the metal soft magnetic composite material is solved.

The invention discloses a preparation method of a boron-based magnesium salt and alcohol / phenol magnesium additive composite magnesium salt electrolyte, and relates to the technical field of magnesium ion batteries, and the preparation method comprises the following steps: S1, in an inert atmosphere or an air environment, dissolving / dispersing a magnesium source in an organic solvent, and stirring to obtain a solution a; s2, adding alcohol or phenol into the solution a, and reacting to obtain a solution b; s3, performing post-treatment on the solution b to obtain alcohol magnesium salt or phenol magnesium salt crystals; and S4, co-dissolving alcohol magnesium salt or phenol magnesium salt and fluorine-containing alkoxy magnesium borate in an ether solvent according to a molar ratio of 1: (3-100) to form the composite magnesium salt electrolyte. According to the magnesium battery using the electrolyte, the cycle life can be prolonged by 20%-100%, the actual service cycle of the battery is prolonged, the coulombic efficiency is improved to 97%-99.5%, irreversible capacity loss in the charging and discharging process is reduced, the energy utilization efficiency is improved, the oxidation potential is improved by 0.2-0.5 V compared with that of a traditional electrolyte, the stability and oxidation resistance of the electrolyte are enhanced, and the service life of the magnesium battery is prolonged. And the working voltage window of the battery is widened.

A CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite that includes orthorhombic calcium metaborate (CaB2O4), tetragonal lead tetroxide (Pb3O4), magnesium borate (Mg3B2O6), and carbon (C). The CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite includes 55 to 70 atomic percent (at. %) oxygen (O), 5.0 to 12.5 at. % calcium (Ca), 7.5 to 15 at. % magnesium (Mg), 7.5 to 15 at. % lead (Pb), 2.5 to 7.5 at. % boron (B), and 2.5 to 7.5 at. % carbon (C), each based on a total number of atoms in the CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite. The nanocomposite is used in a method of removing organic pollutants and / or heavy metals from water.

The invention relates to the technical field of environment-friendly coatings, in particular to a coating with good wear resistance and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 30 to 40 parts of deionized water, 20 to 30 parts of alkyd resin, 15 to 25 parts of waterborne acrylic emulsion, 10 to 20 parts of wear-resistant additive, 5 to 10 parts of molybdenum disulfide micro powder, 1 to 3 parts of dispersing agent, 0.5 to 2 parts of thickening agent and 0.5 to 1 part of defoaming agent. According to the invention, the nickel-based metal glass micro powder provides rigid support by an amorphous structure, a polar interface is formed after a surface oxide layer of the nickel-based metal glass micro powder is removed, the nickel-based metal glass micro powder and a resin matrix construct an anti-load framework, magnesium borate whiskers are inserted into gaps of the framework by virtue of needle-shaped structures to form an interlocking network, and an amino silane coupling agent forms chemical bond bridging on the surfaces of the whiskers, so that the anti-load performance of the magnesium borate whiskers is improved. After the polytetrafluoroethylene micro powder is pretreated, a lubricating film is formed on the surface of the coating, the friction coefficient is reduced, and high wear resistance of the coating is achieved through linkage of the polytetrafluoroethylene micro powder, the lubricating film and the friction coefficient.

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

The invention relates to the technical field of preparation of polishing solutions, in particular to an ultra-pure polishing solution for fine polishing of silicon wafers and a preparation method of the ultra-pure polishing solution. 1.2 to 1.5 parts of zirconium oxide coated aluminum oxide; 0.002 to 0.004 part of a magnesium borate nanowire; sodium periodate; 0.4 to 0.6 part by weight of the cleaning agent and 96.0 to 97.2 parts by weight of ultrapure water. A nano hydrogenated diamond, cubic boron nitride and zirconium oxide coated aluminum oxide ternary abrasive system is adopted, a path for eliminating metal pollution from the source is combined with an all-organic metal-free additive, and meanwhile cooperative control over abrasive monodispersity and purity is achieved through the electrochemical purification and acoustic magnetic resonance dispersion technology; and finally, in the fine polishing process of the silicon wafer, the surface roughness is smaller, the metal pollution is lower, the polishing rate is greatly increased compared with that of a traditional process, the storage stability reaches 180 days without sedimentation, and the polishing agent is suitable for various application scenes of fine polishing of the silicon wafer.

The application belongs to the technical field of lithium ion battery electrode materials, and discloses a method for in-situ coating of magnesium borate on a lithium ion battery positive electrode material. By adjusting the feeding ratio of a magnesium source and a boron source, and by using the positive charge layer on the surface of the lithium ion battery positive electrode material, the borohydride groups with negative charges dispersed in the solution, and the magnesium ion groups with positive charges, a positive-negative-positive charge distribution layer is constructed. Then, through a hydrolysis reaction, a uniform and complete amorphous magnesium borate coating is in-situ coated on the surface of the positive electrode material, a series of in-situ coating of magnesium borate (Mg2B2O5, Mg3B2O6, MgB4O7) is realized, and a lithium ion battery positive electrode material with good interface stability in air and electrolyte is prepared. The method provided by the application has remarkable effects, simple and efficient steps, low cost, and is easy to realize industrialized preparation.

A mixed metal oxide nanocomposite comprises magnesium, titanium, boron, and oxygen. The nanocomposite comprises a first phase of magnesium titanium oxide (MgTi2O5) and a second phase of magnesium borate (Mg3B2O6). The first phase and the second phase are present as a homogeneous mixture within the nanocomposite and exhibit an orthorhombic crystal system. The nanocomposite is mesoporous with a mean pore diameter of 5 to 10 nm.

The present application relates to the technical field of thermal insulation homogeneous bricks, and particularly discloses a cement thermal insulation homogeneous brick, which comprises cement, shale mineral powder, modified vitrified microbeads, lime, polymer glue powder, perlite, reinforced fiber, EPS polystyrene particles, deionized water, calcium carbonate, calcium silicate, magnesium borate, straw powder, AR glass fiber, carboxymethyl cellulose, water reducing agent, foaming agent, foaming regulator, catalyst, crosslinking agent, foam stabilizer and glyoxal, and the components are respectively 300-400 parts of cement, 42-45 parts of shale mineral powder, 33-38 parts of modified vitrified microbeads, 15-25 parts of lime, 2-5 parts of polymer glue powder, 15-18 parts of perlite, 8-12 parts of reinforced fiber, 10-15 parts of EPS polystyrene particles, 200-300 parts of deionized water, 2-3 parts of calcium carbonate and 2-3 parts of calcium silicate in terms of weight ratio. The present application can effectively solve the problems of low structural strength, poor fire resistance and thermal insulation performance and failure to meet the use requirements of the existing cement thermal insulation homogeneous bricks.

The application belongs to the technical field of polytetrafluoroethylene pipe preparation, and particularly relates to a modified polytetrafluoroethylene pipe and a preparation method thereof. The modified polytetrafluoroethylene pipe is composed of the following raw materials in percentage by mass: polytetrafluoroethylene resin 74-76%, modified red mud 4-5%, modified nano lanthanum phosphate and magnesium borate whisker mixture 3.0-4.0%, and extrusion aid 16-18%. The modified polytetrafluoroethylene pipe has high tensile strength and low water vapor permeability due to the synergistic effect of the raw materials.

The invention provides a special grouting material for wind power grouting as well as a preparation method and application thereof, and relates to the technical field of building materials. The grouting material is prepared from the following raw materials: Portland cement, quartz sand, mineral powder, silica fume, sulphoaluminate, layered double hydroxides, fibers, nano silicon dioxide, magnesium borate whiskers, calcium alginate, a water reducing agent, an expanding agent, a defoaming agent and a preservative. The method can support foundation construction of 20MW-level fans in typhoon active areas such as eastern Guangdong and southern Fujian in China, the single-wind-field grouting cost is reduced by 40%, carbon emission in the whole life cycle is reduced by 35%, and the method has great strategic significance in guaranteeing national energy safety and achieving the dual-carbon target.

A neutron shielding composite material comprising a magnesium borate matrix and a tungsten boride filler is described, optionally including additional fillers such as tungsten. A method for manufacturing the composite material is also described.

The invention discloses a reinforced and toughened plastic pipe and a preparation method thereof, belongs to the technical field of pipe preparation, and aims to solve the technical problem that the ring stiffness and wear resistance of a toughened plastic pipe need to be further improved in the prior art. A phosphorus-silicon hybrid polyvinyl chloride matrix prepared by the invention provides a compact and stable main body structure, thermal stability and interface bonding are ensured, phosphorylated magnesium borate whisker endows a system with excellent bearing and wear-resistant characteristics, a continuous mechanical transmission path is formed, and a silicon-urethane elastic phase adjusts stress distribution on a micro level, so that the wear resistance of the system is improved. The three components are mutually supported and dynamically cooperated under different temperature and stress environments, so that the material has the characteristics of high strength, wear resistance and flame-retardant safety.

This invention discloses a fracturing emulsion polymer thickener and its preparation process in the field of oilfield chemicals. The preparation process includes: mixing white oil, Span 80, Tween 60, and octadecyl acrylate to obtain an oil phase; heating deionized water, adding acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, bimetallic layered hydroxide-modified nano-silica, organosilane coupling agent-functionalized layered silicate-magnesium borate potassium complex, disodium ethylenediaminetetraacetate, and isopropanol, adjusting the pH to obtain an aqueous phase; adding the aqueous phase dropwise to the oil phase for emulsification to obtain a pre-emulsion; purging with nitrogen, adding benzoyl peroxide, heating for polymerization, and cooling to obtain the final product. This invention constructs a rigid inorganic-organic hybrid network in the polymer matrix, significantly improving the thickener's temperature resistance, salt resistance, and shear resistance, which can meet the needs of fracturing stimulation in deep, high-temperature, and high-salt reservoirs.

This invention provides a wear-resistant, non-slip matte ceramic tile and its preparation method, relating to the field of ceramic tile preparation technology. The tile includes a ceramic matrix, the surface of which is covered with a base glaze and a functional glaze. The base glaze, by weight, comprises 38-42 parts potassium feldspar powder, 23-27 parts quartz powder, 13-17 parts kaolin, 8-12 parts calcite powder, 4-6 parts zinc oxide, 1-2 parts sodium carboxymethyl cellulose, and 55-60 parts water. The functional glaze, by weight, comprises 16-18 parts 3mol% yttrium oxide-stabilized zirconium oxide powder, 13-16 parts silicon carbide powder, 0.5-0.9 parts magnesium borate, 0.2-0.4 parts ammonium polyacrylate, 0.3-0.5 parts calcium zirconate powder, 1.4-1.6 parts tetraethyl orthosilicate hydrolysate, 27-29 parts potassium feldspar powder, 22-25 parts quartz powder, and 60-66 parts water. The beneficial effects of this invention are: high wear resistance and long-lasting anti-slip properties are achieved through zirconium oxide phase transformation stress regulation and microcrack structure design.

The invention provides a method for preparing boric acid from salt lake brine and a boric acid product. According to the method for producing the boric acid product from the salt lake brine, the salt lake brine is used as a raw material, a three-stage synergistic process system of external field enhanced crystallization, directional acidolysis conversion and membrane separation and purification is constructed for producing the boric acid product from the salt lake brine, hydrated magnesium borate is induced to be crystallized and separated out by adding water for dilution, and the raw material with high boron content is obtained; the method comprises the following steps of: adding magnesium borate into a raw material, adding acid for dissolving to convert a magnesium borate product into a magnesium-containing boric acid solution, finally obtaining a boron-rich concentrated solution by a membrane separation and purification method, and crystallizing to obtain a high-purity boric acid product, so that a green production mode of zero chemical reagent addition is realized, and a high-boron-content raw material is obtained by external field enhanced crystallization; sufficient raw material guarantee is provided for subsequent boric acid preparation; converting magnesium and boron in the magnesium borate product into a magnesium-containing boric acid solution in combination with directional acidolysis conversion, finally obtaining a boron-rich concentrated solution through a membrane separation and purification method, and crystallizing to obtain a high-purity boric acid product.

The application discloses a modified PET engineering plastic preparation process, which comprises the following steps: S1, raw material weighing: PET chips, nano silicon dioxide, magnesium borate whisker, coupling agent, antioxidant and lubricant are weighed separately and prepared for use; S2, raw material mixing: the raw materials in S1 are put into a mixing machine for mixing processing to obtain a mixture; S3, melt extrusion: the mixture in S2 is sent into a double-screw extruder for melt blending extrusion, drawing, water cooling, granulation and drying, and the finished product is obtained, wherein the mixing machine comprises a mixing tank, and the application relates to the technical field of engineering plastic preparation. The modified PET engineering plastic preparation process is convenient for putting the raw materials into the mixing tank, dispersing the raw materials through the first and second dispersion plates, avoiding the caking of the raw materials, and mixing the raw materials through the stirring rod, so that the mixing effect of the raw materials is improved.

The application relates to the technical field of lithium extraction from brine, and provides a pretreatment method of high-magnesium boron-containing brine and application thereof. Before entering a lithium extraction device by electrodialysis, the high-magnesium boron-containing brine is pretreated, and the pretreatment method comprises the following steps: diluting the high-magnesium boron-containing brine by adding water to obtain diluted high-magnesium boron-containing brine; adding crystal seeds into the diluted high-magnesium boron-containing brine, stirring, and then standing and settling to obtain supernatant, and the supernatant is first pretreated high-magnesium boron-containing brine; and adding acid into the first pretreated high-magnesium boron-containing brine to adjust the pH value to 5.0-6.5. By the above method, the concentration of boron ions in the brine can be reduced, the influence of magnesium borate precipitation on the electrodialysis membrane can be reduced, and the stability and continuity in the lithium extraction process by electrodialysis can be improved.

The invention discloses an interface enhancer and a construction method thereof. The interface enhancer comprises water-based latex, emulsified asphalt, an enhancer, modified nickel slag powder, a magnesium-based stabilizer, a superfine siliceous material and a dispersing agent. The magnesium-based stabilizer is sodium oleate modified magnesium oxide and magnesium borate whisker. The construction method comprises the following steps: uniformly mixing the water-based latex and the emulsified asphalt to obtain a mixed emulsion A; mixing a reinforcing agent with a dispersing agent to obtain a reinforced pre-reaction solution B, and adding the modified nickel slag powder, a superfine siliceous material and a magnesium-based stabilizer to form a reaction reinforced solution C; and finally, uniformly stirring the mixed emulsion A and the reaction strengthening liquid C, coating the well wall with the mixed emulsion A and the reaction strengthening liquid C, and reacting to form a consolidated body. The material system of the interface enhancer is high in compressive strength and excellent in toughness, and when the interface enhancer is applied to the well wall, the compressive strength of the well wall can be effectively improved.

The application relates to the technical field of waste landfill odor treatment, and particularly discloses a closed film applied to a waste landfill and a buried gas treatment process. The closed film applied to the waste landfill comprises an anti-seepage layer, an anti-aging layer and a reinforcing layer which are sequentially arranged; the raw material of the anti-seepage layer comprises the following components in parts by weight: 90-95 parts of high-density polyethylene, 1-3 parts of ethylene-vinyl alcohol copolymer, 5-8 parts of nano talcum powder, 3-5 parts of magnesium borate whisker, 0.3-0.7 parts of calcium chloride and 0.5-1 part of lubricant. In the application, the talcum powder prolongs the gas permeation path, the magnesium borate whisker fills the high-density polyethylene crystal defects and improves the size stability; the ethylene-vinyl alcohol copolymer and the calcium chloride improve the compactness, and the three components cooperatively construct a compact barrier network, reduce the gas permeability and thus improve the sealing performance of the closed film.

The application discloses a reinforced and toughened plastic pipe and a preparation method thereof, and belongs to the technical field of pipe preparation, and aims to solve the technical problem that the ring stiffness and wear resistance of the toughened plastic pipe need to be further improved in the prior art. The phosphorus-silicon hybrid polyvinyl chloride matrix prepared by the application provides a compact and stable main structure, guarantees thermal stability and interface combination, the phosphatized magnesium borate whisker endows the system with excellent bearing and wear resistance, forms a continuous mechanical transmission channel, the silicon-urethane elastic phase adjusts stress distribution at a micro level, releases external load impact and improves carbon layer completeness, and the three components support and dynamically cooperate with each other under different temperature and stress environments, so that the material has high strength, wear resistance and flame-retardant safety characteristics.

The application discloses a magnesium borate-aluminum diethyl hypophosphite core-shell structure composite flame retardant and a preparation method thereof, and belongs to the technical field of polymer material flame retardation. The flame retardant takes magnesium borate whiskers synthesized by a high-temperature solid phase method as an inner core, and aluminum diethyl hypophosphite is in-situ and uniformly coated on the surface of the inner core by a metathetical precipitation method, so as to form a composite particle with a clear core-shell structure. By constructing a core-shell structure with strong interface combination, physical enhancement of magnesium borate, auxiliary flame retardation and molecular-level synergy of efficient chemical flame retardation of aluminum diethyl hypophosphite are realized, so that the composite flame retardant can not only significantly improve the flame retardation grade and smoke suppression of the material, but also effectively enhance the mechanical properties of the matrix when the adding amount of the composite flame retardant in the polymer matrix is low, and the technical problems of weak interface, poor synergy and damage to the mechanical properties when traditional flame retardants and reinforcing fillers are simply blended are solved.

The invention belongs to the technical field of refractory materials, and discloses a hot galvanizing pot dry ramming material and a preparation method and application thereof. The dry ramming material comprises the following raw materials in percentage by mass: 40-80% of tabular corundum, 5-40% of boron nitride combined silicon carbide, 5-20% of chrome corundum, 1.5-7% of nano calcium oxide, 1-3% of zirconium oxide, 1-3% of titanium oxide, 0.5-4% of magnesium borate, 1-5% of silicon carbide whiskers, 1-2.5% of calcium fluoride and 0.3-1% of dicerium trioxide. The dry ramming material can be fully sintered under the medium-low temperature condition, material looseness and cracks are avoided, the use stability under the medium-low temperature working temperature is guaranteed, the dry ramming material has good permeability resistance and erosion resistance, the dry ramming material can adapt to different working conditions of pure zinc and alloy hot dipping, and the service life of a zinc pot under different use scenes is effectively prolonged.

The application discloses a long rod bolt heat treatment process and relates to the technical field of metal heat treatment. The long rod bolt heat treatment process steps of the application successively comprise ultrasonic cleaning, primary salt quenching, secondary salt quenching and tempering. The molten salt solution for the primary salt quenching is magnesium borate, magnesium oxide grains are formed in the long rod bolt after the primary salt quenching, so that the grain boundaries of austenite are pinned, the growth of austenite grains is suppressed, and the formation of acicular ferrite is promoted. The molten salt solution for the secondary salt quenching is aluminum silicate. When the secondary salt quenching is performed, the aluminum silicate and the borate on the surface of the long rod bolt after the primary salt quenching are combined to form a dense ceramic layer. The long rod bolt prepared by the application has high toughness and good corrosion resistance.

The invention provides a wear-resistant anti-skid matte ceramic tile and a preparation method thereof, and relates to the technical field of ceramic tile preparation, the wear-resistant anti-skid matte ceramic tile comprises a ceramic matrix, the surface of the ceramic matrix is covered with basic glaze and functional glaze, the basic glaze is prepared from the following components in parts by weight: 38 to 42 parts of potassium feldspar powder, 23 to 27 parts of quartz powder, 13 to 17 parts of kaolin, 8 to 12 parts of calcite powder, 4 to 6 parts of zinc oxide, 1 to 2 parts of sodium carboxymethyl cellulose and 55 to 60 parts of water; the functional glaze is prepared from the following components in parts by weight: 16 to 18 parts of 3 mol% yttrium oxide stabilized zirconium oxide powder, 13 to 16 parts of silicon carbide powder, 0.5 to 0.9 part of magnesium borate, 0.2 to 0.4 part of ammonium polyacrylate, 0.3 to 0.5 part of calcium zirconate powder, 1.4 to 1.6 parts of tetraethoxysilane hydrolysate, 27 to 29 parts of potassium feldspar powder, 22 to 25 parts of quartz powder and 60 to 66 parts of water. The high-wear-resistance and durable-skid-resistance zirconia ceramic has the beneficial effects that high wear resistance and durable skid resistance are achieved through zirconia phase change stress regulation and control and microcrack structure design.