225 results about "Aluminum borate whiskers" patented technology

The invention relates to a method for preparing a carbon nanotube and aluminum borate whisker hybrid reinforced aluminum-matrix composite material, which relates to a method for preparing an aluminum-matrix composite material which is simultaneously reinforced by microfibers and nanofibers. The method solves the problem that the aluminum-matrix composite material prepared by the conventional method for preparing aluminum-matrix composite materials has poor performance, low interface bonding and difficult uniform distribution of two wild phases of carbon nanotubes and whiskers. The method comprises the following steps of: 1, mixing raw materials by a wet process; 2, preparing a prefabricated block; 3, drying the prefabricated block; 4, sintering the prefabricated block; and 5, casting molten aluminum alloy into a mould provided with the prefabricated block and applying pressure on the mould to obtain the carbon nanotube and aluminum borate whisker hybrid reinforced aluminum-matrix composite material. In the method, the two wide phases of the carbon nanotubes and the whiskers are uniformly distributed, and the carbon nanotube and aluminum borate whisker hybrid reinforced aluminum-matrix composite material prepared by the method has high performance and high interface bonding.

A light-reflective anisotropic conductive adhesive used for anisotropic conductive connection of a light-emitting element to a wiring board contains a thermosetting resin composition, conductive particles, light-reflective needle-shaped insulating particles, and light-reflective spherical insulating particles. Each of the amount of the light-reflective needle-shaped insulating particles and the amount of the light-reflective spherical insulating particles in the thermosetting resin composition is 1 to 50 percent by volume based on the volume of the thermosetting resin composition, and the mixing ratio (V/V) of the light-reflective spherical insulating particles to the light-reflective needle-shaped insulating particles is 1:1 to 10. The light-reflective needle-shaped insulating particles are titanium oxide whiskers, zinc oxide whiskers, titanate whiskers, aluminum borate whiskers, or wollastonite.

The invention relates to an alumina ceramic low temperature brazing connection method and aims at solving the problems that existing brazing alumina ceramics are high in soldering temperature and low in connection strength of obtained joints. The brazing connection method comprises the following steps: 1, mixing Bi2O3, B2O3, ZnO and SiO2, and obtaining low-melting-point bismuthate glass powder; 2, conducting mechanical grinding on an alumina ceramic, conducting ultrasonic cleaning, and obtaining a pre-treated alumina ceramic; 3, preparing an alumina ceramic where aluminum borate whiskers grow; 4, applying glass soldering paste to the surface of the alumina ceramic where the aluminum borate whiskers grow; 5, making two alumina ceramic parts to be soldered be in contact and aligned with each other; 6, conducting brazing connection at the temperature of 480-650 DEG C. By means of the alumina ceramic low temperature brazing connection method, connection of the alumina ceramic is achieved at the low temperature, the thermal expansion coefficient of the adopted glass brazing material is matched with the alumina ceramic, the shearing strength of an obtained soldered joint can reach 60-100 MPa, and reliability of alumina connection is guaranteed.

The invention relates to ZnAl2O4 covering aluminium borate crystal whisker strengthening aluminium base or magnesium base composite and its manufacturing method. It solves the current problems that aluminium borate crystal whisker and basal body wet ability is bad and their bonding strength is not high. And it can effectively obstruct interface reaction. The composite is made up of ZnO, aluminium borate crystal whisker, and aluminium base or magnesium base. The preparing steps as the following: adding aluminium borate crystal whisker into ZnO sol to make ZnO coating aluminium borate crystal whisker; preparing ZnAl2O4 covering aluminium borate crystal whisker precast block; extrusion casting to gain the composite. The superficial reacted by ZnO and aluminium borate can improve aluminium borate crystal whisker and basal body wet ability and interface bonding strength to obviously improve composite mechanical property.

The invention relates to a heat insulation spray coating, belonging to the field of fireproof materials. The heat insulation spray coating comprises the following components in parts by weight: 38-58 parts of waste lightweight clay bricks, 3-9 parts of raw perlite, 10-20 parts of cement, 20-30 parts of flint clay powder, 5-8 parts of Guangxi mud, 1-3 parts of talc powder and 0.5-2 parts of additional aluminum borate whiskers. The heat insulation spray coating disclosed by the invention can be used for rapid construction in use, is practical, does not need special maintenance, has good acid resistance and reduction resistance, is good in service performance, and is suitable for occasions requiring heat insulation or occasions with strong reducing properties.

The invention discloses a conductive polyurethane sole material which comprises the following components in percentage by weight: 30-45% of polyhydric alcohol, 4-9% of a chain extender, 0.03-2% of a catalyst, 0.09-0.3% of a foamer, 0.05-2% of a foam stabilizer, 3-10% of plasticizer, 30-45% of prepolymer, 0.5-5% of graphite and 1-8% of aluminum borate crystal whiskers. The conductive performance of the polyurethane shoe material can be extremely improved by adding graphite and aluminum borate crystal whiskers. The affinity of graphite and aluminum borate crystal whiskers to the polymer is improved by surface pretreatment for graphite and aluminum borate crystal whiskers through a coupler. The toughness of the polyurethane material is not reduced to a great extent due to the addition of the inorganic conductive component by adding the plasticizer. In addition, the conductive polyurethane sole material disclosed by the invention is simple in process and environment-friendly.

The invention discloses toughened ceramic for an insulator and a preparation method of the toughened ceramic. The toughened ceramic is prepared from, by weight, 2-3 parts of aluminum borate whiskers, 70-80 parts of silicon carbide micro powder with the proper size, 20-30 parts of aluminum nitride micro powder with the proper size, 1-1.5 parts of calcium fluoride powder, 10-15 parts of carbon powder, 10-15 parts of molybdenum silicide, 6-8 parts of ethyl orthosilicate, 3-5 parts of absolute ethyl alcohol, 3-5 parts of purified water and 1.5-2.5 parts of thermoplastic phenolic resin. By means of the steps of raw material preparation, insulator pre-preparation, insulator sintering and completing, the high-tenacity insulation ceramic with the volume resistivity larger than or equal to 2*1,013 omega-cm, the dielectric strength larger than or equal to 750 kV/cm, the thermal conductivity larger than or equal to 25 W/m.K, the bending strength larger than or equal to 400 Mpa, the Young modulus larger than or equal to 320 Gpa and the breaking tenacity larger than or equal to 25 Mpa is formed. The toughened ceramic is good in economical efficiency, resistant to high temperature oxidation and high in breaking tenacity, and the functions of main materials complement one another.

The invention relates to an aluminum alloy sliding valve which comprises a valve body and a valve element. The valve body and the valve element are made of aluminum alloy materials. Aluminum alloy comprises, by mass percent, 1.0-1.5% of Mg, 0.6-1.0% of Si, 0.3-0.5% of Cu, 0.1-0.3% of Zn, 0.1-0.3% of Mn, 0.05-0.2% of Cr, 0.05-0.1% of Ti, 0.3-0.6% of Fe, 0.15-0.5% of Zr, 0.05-0.3% of Nb, 0.5-0.8% of Bi, 0.3-1% of rare earth element, 10-30% of aluminum borate whisker and the balance Al and inevitable impurity elements. The valve body and the valve element of the sliding valve are made of aluminum alloy materials, and the beneficial effects of being low in weight, high in strength, resistant to corrosion and the like are achieved.

The invention provides an aluminum borate crystal whisker reinforced low-temperature unleaded composite soldering paste and a preparation method thereof, relating to a soldering paste and a preparation method thereof, which solve the problem that extremely serious coarsing of tissues and an intermetallic compound after high-temperature aging exists in the traditional low-temperature unleaded solder. The aluminum borate crystal whisker reinforced low-temperature unleaded composite soldering paste is prepared from aluminum borate crystal whiskers, Sn-58Bi powder and rosin type scaling powder. The method comprises the steps of: weighing raw materials, filtering and drying the aluminum borate crystal whiskers after stirring, putting the aluminum borate crystal whiskers together with the Sn-58Bi powder, 12-hydroxystearic acid and ZrO2 grinding balls into a ball milling jar for ball milling to obtain composite solder powder; and stirring the composite solder powder and the rosin type scaling powder to obtain the soldering paste. According to the invention, the tissues are obviously refined, the tensile strength of the prepared soldering paste is 59.4-62.0 MPa, the 0.2% yield strength ofthe prepared soldering paste is 51.9-55.2 MPa, the percentage elongation of the prepared soldering paste is 33.1-56.5%, and the shear strength of a BGA (Ball Grid Array) soldering point is increased by 14-29.3%.

The invention relates to a preparation method of high-barrier and high density polyethylene (HDPE) plastic, and belongs to the technical field of preparation of plastic products. The preparation method comprises the following steps: mixing and stirring aluminum borate whiskers, attapulgite crystals, isinglass, a sodium hydrogen carbonate solution and talcum powder to obtain a mixture, performing microwave radiation, soaking the mixture into a sulfamic acid solution for heating and dispersion, performing ultrasonic treatment on suspensions, filtering, washing and drying the suspensions on the upper layer, mixing and stirring an obtained material with silicon dioxide, polyisobutylene colloidal particles, stearic acid, organic montmorillonite, HDPE-g-MAH and a silane coupling agent, drying, then adding HDPE plastic powder, performing blending and extrusion through two screw rods to obtain high-barrier HDPE plastic particles, and melting the particles to obtain the high-barrier HDPE plastic. Compared with the prior art, barrier materials such as the isinglass are added into the HDPE, so that the prepared HDPE has the characteristics of high barrier and high intensity, and can be used for high-barrier packaging of thin films, bottled and canned foods, medicines, daily necessities and the like.

The invention discloses an anti-aging and wear-resistant rubber material for a tire. The anti-aging and wear-resistant rubber material for the tire is prepared from, by weight, 15-35 parts of natural rubber, 25-35 parts of 320 type chloroprene rubber, 25-35 parts of neoprene, 20-50 parts of modified kaolinite, 0.5-1.5 parts of 616 antiager, 0.2-0.8 part of phosphite, 0.5-1.2 parts of tetramethyl thiuram disulfide, 0.5-1.5 parts of zinc oxide, 1-3 parts of magnesium oxide, 5-15 parts of pumice, 10-18 parts of zinc borate, 1-2 parts of aluminum borate whiskers, 12-18 parts of sodium antimonite, 5-15 parts of aluminum phosphate, 10-20 parts of carbon black, 0.2-0.8 part of polyepoxy soybean oil, 0.1-0.9 part of hydroxyl silicone oil, 1-2 parts of white oil, 1-3 parts of pine tar, 0.2-0.8 part of fatty acid, 0.5-1.5 part of stearic acid and 1-2 parts of 3-aminopropyltrimethoxysilane. The anti-aging and wear-resistant rubber material for the tire is good in wear-resistant and anti-tear performance and excellent in anti-aging performance.

The invention discloses an anti-cracking self-lubricating metal ceramic bearing. The anti-cracking self-lubricating metal ceramic bearing is prepared from, by weight, 2.3-2.4 parts of ferric citrate, 3.1-3.5 parts of basic nickel carbonate, 0.2-0.3 part of flaky niobium pentoxide, 0.3-0.4 part of dimolybdate boride, 25-30 parts of water, an appropriate amount of ammonium hydroxide, 2.9-3 parts of TiH2, 12-12.5 parts TiC, 2-2.3 parts of aluminum borate whisker, 1.6-1.8 parts of tantalum-doped tungsten bronze powder, 0.7-0.9 part of lubricant, 1-1.1 parts of C, 8.6-9 parts of W, 6.1-6.3 parts of Mo, 3.1-3.3 parts of V and 65-66 parts of Fe. By means of flaky niobium pentoxide, dimolybdate boride, aluminum borate whisker and tantalum-doped tungsten bronze powder, the lubricating performance in the pressing process is improved, and the toughness and cracking resistance are improved after sintering.

The invention provides a porcelain formula and a manufacturing process thereof. Soft kaolin, flint clay, potassium feldspar and large ball mud are used as raw materials to prepare a matrix material; silicon dioxide, potassium fluoroaluminate, cerium dioxide, yttrium oxide, aluminum borate whiskers, nano-zinc oxide, cerium-graphene nano-particles and large ball mud superfine powder are used as rawmaterials to prepare glaze, the raw materials of the glaze are properly matched in thickness, the compactness of a glaze layer is improved, the apparent porosity is low, contamination is not likely tohappen, the wear resistance is good, and the bactericidal effect is achieved. The matrix material and the glaze material generate light interaction, so that the porcelain has relatively high whiteness and glossiness, and the attractiveness is greatly improved.

The invention relates to a method for improving the mechanical property of aluminum matrix composite materials, in particular to a method for improving the mechanical property of aluminum borate whisker enhanced aluminum matrix composite materials. The technical problem that the mechanical property of existing aluminum borate whisker enhanced aluminum matrix composite materials is poor is solved. The method comprises the first step of adding of matrix alloy elements, the second step of preparing of aluminum magnesium alloy cast ingots, the third step of preparing of aluminum borate whisker prefabricated members and the fourth step of squeeze casting. Alloying element zinc or magnesium is added into pure aluminum, and a formed binary alloy is adopted as a matrix of the composite materials. In the preparing process of the composite materials, by means of the change and the content change of the matrix alloy elements, the interface structure and state of the composite materials are changed, and interfacial wettability is improved; and interface bonding of whiskers and the matrix is improved, and the mechanical property of the composite materials is remarkably improved. The method is applied to preparing of the aluminum matrix composite materials.

The invention belongs to the technical field of rock plates, and particularly discloses a rock plate with a mutton fat jade touch feeling , the rock plate comprises a green body layer and a glaze layer from bottom to top, and the glaze layer is formed by sintering mutton fat jade glaze on the green body layer; and the mutton fat jade glaze is prepared from the following raw materials in parts by weight: 28-40 parts of potassium-containing minerals, 20-30 parts of kaolin, 15-20 parts of quartz sand, 6-11 parts of modified aluminum borate whiskers, 4-8 parts of spodumene, 3-7 parts of a lubricant and 1-4 parts of calcium silicate. The rock plate disclosed by the invention is oily, smooth and fine in touch feeling, has the touch feeling similar to that of mutton fat jade, and has a good wear-resistant effect. Under the formula system taking the potassium-containing minerals and the kaolin as the main materials, the lubricant is added, so that the rock plate which is oily, smooth and fine in touch feeling and has the touch feeling similar to that of mutton fat jade can be obtained.

The invention provides a method for preparing nano slabby aluminium borate whisker by hydrothermal method, relating to a borax preparation technology. The method includes the following steps: firstly aluminium nitrate solution is mixed with borax solution, then surfactant is added, pH value of solution is regulated, reaction is carried out, solution is moved into a hydrothermal kettle, reaction is carried out again under pressure and temperature conditions, and cooling, filtering, washing and drying are carried out, thus obtaining the slabby aluminium borate whisker. The nano slabby (band) aluminium borate whisker with high elastic modulus, good mechanical strength, heat resistance, chemical resistance, acid resistance, electric insulativity, neutron absorption performance and covalency with metal can be prepared. The whisker not only can be applied to heat-insulating, heat-resistant and corrosion-resistant materials but also can be applied to thermoplastic resin, thermosetting resin, cement, ceramic and metal reinforcing agent. The whisker also can be applied to reinforced metal base (aluminium base and magnesium base), ceramic base, plastic, glass, fiber and paint.

The invention discloses a method for manufacturing an aluminum borate crystal whisker enhancement combustor throat embedded ring inner-cooling aluminum piston. The method comprises the steps that firstly, an aluminum borate crystal whisker prefabricated piece blank is manufactured with the in-situ growth method, the shape of the blank is close to the final shape, and only one to three millimeters of working allowance is reserved; secondly, the aluminum borate crystal whisker prefabricated piece blank is manufactured into a finished product; thirdly, a ceramic salt core is manufactured; fourthly, the aluminum borate crystal whisker prefabricated piece is preheated; fifthly, after the soluble core is preheated, the aluminum borate crystal whisker prefabricated piece is taken out, and the soluble core is placed into the aluminum borate crystal whisker prefabricated piece and placed into a casting die rapidly; sixthly, an alumetized abrasion resistant cast iron embedded ring is placed into the casting die to be fixed; seventhly, an aluminum alloy solution is poured into the casting die to be pressed and formed; eighthly, a piston blank is heated and machined into a finished product. Crystal whiskers in the aluminum borate crystal whisker prefabricated piece blank formed in an in-situ growth mode are in isotropy, a formed composite material is in isotropy, and the circumferential-direction fatigue crack, caused by isotropy, of original alumina fiber composite materials is avoided.

The invention discloses a preparation method of a ceramic mold material, and belongs to the field of ceramic mold materials. The preparation method comprises the following steps: uniformly mixing a powder for the ceramic mold material with deionized water to prepare a mixed slurry, placing the mixed slurry in a mold, standing, drying, demolding to obtain a ceramic mold material green body, and carrying out high-temperature sintering to obtain the ceramic mold material. The preparation method of the powder for the ceramic mold material comprises the step of uniformly grinding alpha-aluminum oxide powder, aluminum borate whiskers, tin oxide powder, zirconium oxide bead powder and polyurethane/asbestos nano composite material powder under the action of mechanical grinding to obtain the powderfor the ceramic mold material. The powder for the ceramic mold material used in the preparation method is good in dispersity and uniform in particle, and the ceramic mold material which is good in fracture toughness and abrasion resistance, high in strength and high in hardness can be obtained.

The invention provides a thermal insulation material and a preparation method thereof, and relates to the technical field of building materials. The thermal insulation material comprises the followingraw materials: pitchstone glass beads, light magnesium oxide, sodium fluosilicate, aluminium dihydrogen phosphate, polyvinyl alcohol, kaolin, pulverized fuel ash, attapulgite, sepiolite fiber, sodiumsulfosuccinate, cement, floating beads, boron carbide, aluminum borate whiskers, glass fiber, aerogel, a fire retardant, a water reducing agent, a retarder, an air entraining agent, a foaming agent and water. The preparation method comprises the following steps: (1) weighing the raw materials; (2) stirring; and (3) putting the raw materials in a mold and curing. The thermal insulation material prepared according to the preparation method has the advantages of being high in strength, high in flame retardance and high in thermal insulation performance.

The invention relates to a preparation method of aluminum borate whisker, and particularly relates to a preparation method of the aluminum borate whisker. The preparation method of the aluminum borate whisker comprises the following steps of (1) pretreating alumen: calcining the alumen for 2-6 hours at a temperature of 250-350 DEG C, grinding or ball-milling and screening with a 120-mesh sieve; (2) mixing auxiliary materials: mixing pretreated alumen with boric acid and a fluxing agent by fully grinding or ball-milling, wherein a molar ratio of the pretreated alumen to boric acid is (1-4.5):1 and a molar ratio of the pretreated alumen and boric acid to the fluxing agent is 1:(0.5-2); and (3) tabletting the auxiliary materials: putting the mixed auxiliary materials in a mold with a diameter of 10-30 mm, regulating a pressure to 20-80 kN, tabletting the auxiliary materials to obtain a cylindrical auxiliary material; and sintering, leaching and drying the cylindrical auxiliary material to obtain the aluminum borate whisker. The preparation method is simple in process; the produced aluminum borate whisker has excellent qualities; an alum mineral product of alumen and boron resource in Qarhan salt lake are fully utilized; production cost is reduced; and the preparation method has wide industrialization prospects.

The invention discloses a preparation method for a phenolic aldehyde plate thermal insulation material for a building exterior wall, and relates to the technical field of building materials. The preparation method comprises the following steps that expanded perlite and inorganic mineral powder are mixed, the surface is sprayed with water, placing and drying are carried out, the surface of a mixture is sprayed by using an ethanol solution of thermosetting dodecyltrimethoxysilane modified phenolic resin, and curing and drying are carried out so as to obtain a material a; the phenolic resin and carboxyl nitrile rubber are mixed so as to obtain a material b; glass fibers, aluminum borate whiskers, mica powder, sepiolite powder, a silane coupling agent and ethanol are mixed and stirred, then the material b, silicon dioxide aerogel and castor oil polyoxyethylene ether are added, mixing and stirring are carried out, then dichloromethane, lauryl sodium sulfate, a curing agent and the materiala are added, and stirring is carried out so as to obtain a material c; and the material c is poured into a mold, hot-press molding is carried out, and pressure maintaining and cooling are carried outso as to obtain the phenolic aldehyde plate thermal insulation material. The phenolic aldehyde plate thermal insulation material is good in thermal insulation performance and high in strength, powderfalling and scaling-off are not liable to occur, and the fireproofing grade can reach A1 grade.