10 results about "Magnesium titanate" patented technology

The invention discloses a method for synthesizing nano magnesium dititanate by a solid phase method, which comprises the following steps: S1, weighing a titanium-containing solid compound, a nano magnesium oxide solid and a hydrolytic alkaline solid compound, uniformly mixing, adding a surfactant, and grinding to obtain a solid mixture; s2, adding a mixed solution with an alcohol-water ratio of 1: 1 into the solid mixture, and grinding to obtain mixed slurry; s3, transferring the mixed slurry into a centrifugal tube, placing the centrifugal tube in a centrifugal machine for centrifugal separation, pouring out supernatant after the centrifugal separation is finished, and obtaining a mixed product after a water washing process and an alcohol washing process are finished; s4, soaking the mixed product in an inorganic acid solution, transferring the soaked mixed product into a centrifugal tube for centrifugal separation, sequentially completing water washing and alcohol washing processes, and then drying to obtain MgO-coated TiO2 with a core-shell structure; s5, carrying out high-temperature calcination on the obtained MgO-coated TiO2 to obtain a nano magnesium dititanate solid; according to the invention, the problems of large particle size and non-uniform chemical composition of the magnesium dititanate powder prepared in the prior art are solved.

The present invention provides a thermosetting resin composition that yields a cured product (dielectric substrate) with excellent high dielectric constant and low dielectric loss tangent, a dielectric substrate made from the resin composition, and a microstrip antenna equipped with the dielectric substrate. [Solution] The thermosetting resin composition of the present invention comprises (A) a thermosetting resin, (B) a high dielectric constant filler, and (C) a coupling agent represented by the following general formula (1), wherein the high dielectric constant filler (B) comprises at least one selected from calcium titanate, strontium titanate, barium titanate, magnesium titanate, and titanium oxide. TIFF2026111704000022.tif16153

An air cathode and an aluminum-air battery, wherein the air cathode contains an active material, the active material being any one or a mixture of two of the following materials: nickel oxide, iron oxide, manganese oxide, lithium-ion nickel oxide, lithium-ion iron oxide, lithium-ion manganese oxide; strontium titanate doped with any one or two of iron, nickel, manganese, and lanthanum; calcium titanate doped with any one or two of iron, nickel, manganese, and lanthanum; magnesium titanate doped with any one or two of iron, nickel, manganese, and lanthanum; lanthanum nickelate doped with calcium and / or strontium; lanthanum ferrite doped with calcium and / or strontium; lanthanum cobaltate doped with calcium and / or strontium; lanthanum manganate doped with calcium and / or strontium; and graphite or metal carbonitride loaded with a metal.

The invention relates to the technical field of rotary kiln castable, and discloses a three-resistant castable for a rotary kiln and a preparation method of the three-resistant castable for the rotary kiln. Comprising 8 to 10 parts of high-purity tabular corundum fine powder, 25 to 30 parts of mullite, 8 to 13 parts of titanium dioxide, 10 to 15 parts of magnesium titanate, 10 to 13 parts of aluminum titanate, 9 to 12 parts of zinc ferrite, 5 to 8 parts of forsterite, 30 to 45 parts of bauxite, 8 to 12 parts of alumina micro powder, 1 to 3 parts of trizirconium aluminum nitride, 1 to 3 parts of calcium aluminate cement, 0.15 to 0.2 part of sodium tripolyphosphate, 0.9 to 1.6 parts of heat-resistant steel fiber and 0.1 to 0.3 part of allyl polyoxyethylene ether. When a pushing piston moves upwards, a first pushing air bag is extruded, air in the first pushing air bag flows to a second pushing air bag from a connecting pipe, so that the second pushing air bag expands to push a pushing rack, the pushing rack moves to drive a first rotating gear to rotate, a water outlet pipe of a watering barrel extends to the outer side of a water outlet groove, and the pushing rack is reset; and through reciprocating motion of the water spraying structure, more comprehensive spraying on the castable is realized.

This invention discloses a high-nickel cobalt-free cathode material and its preparation method. The preparation method includes the following steps: preparing zirconium-doped high-nickel cobalt-free nickel-manganese hydroxide; adding zirconium-doped high-nickel cobalt-free nickel-manganese hydroxide, lithium hydroxide, magnesium titanate, and zirconium aluminate to water, mixing evenly, and drying to obtain a mixture; placing the mixture in a pure oxygen atmosphere and holding it at 300℃-800℃ for 6-12 hours to obtain high-nickel cobalt-free nickel-manganese lithium oxide; mixing high-nickel cobalt-free nickel-manganese lithium oxide, borosilicate, and tungsten oxide evenly, drying, and sintering to obtain the target product. In this invention, the addition of magnesium titanate and zirconium aluminate during the preparation process makes the material's crystal structure more complete; the synergistic coating of borosilicate and tungsten oxide effectively improves the specific capacity of the material, better stabilizes the crystal structure, and significantly enhances the overall performance of the material.

The high-temperature-resistant brake pad material is prepared from the following raw materials in parts by weight: 18 to 22 parts of boron modified phenolic resin, 10 to 15 parts of modified carbon fiber, 4 to 7 parts of aramid fiber, 9 to 13 parts of ferrotitanium powder, 10 to 15 parts of potassium magnesium titanate lamellar crystal, 3 to 5 parts of nitrile rubber powder, 4 to 6 parts of natural graphite, 3 to 5 parts of petroleum coke, 5 to 8 parts of barite and 3 to 5 parts of aluminum oxide. According to the high-temperature-resistant brake pad material, boron-modified phenolic resin serves as a base body, functional components such as modified carbon fibers, aramid fibers, ferrotitanium powder and potassium magnesium titanate lamellar crystals are matched, and through the reasonable formula design and the forming technology, on the basis that it is guaranteed that a brake pad has the excellent friction and wear performance, the high-temperature-resistant brake pad material is obtained; the thermal stability and the interface bonding strength of the material under the high-temperature working condition are remarkably improved, and the problems that a traditional brake pad material is prone to heat fading and interface stripping under the high-temperature braking condition are solved.

The invention discloses high-weather-resistance chlorination process titanium dioxide and a preparation method. The titanium dioxide comprises a titanium dioxide base material and a coating layer located on the surface of titanium dioxide, the coating layer at least comprises a compact silicon film layer, a zinc silicate film layer and a magnesium titanate film layer from inside to outside; the compact silicon film layer is formed by adding a soluble silicic acid source and a pH regulator into chlorination-process titanium dioxide-based material slurry and homogenizing; the pH value of the slurry is kept to be greater than or equal to 10.0 in the preparation process of the titanium dioxide-based material slurry by the chlorination method. The titanium dioxide provided by the invention has extremely high weather resistance, and can be used in scenes with relatively high weather resistance requirements, such as outdoors and the like.

According to the anti-sticking coating for sintering, TiN or TiC serves as an anti-sticking and blocking material, MgO serves as a shell forming agent, MgO and a TiO2 oxide film formed on the surface of the TiN or TiC form a magnesium titanate (MgTiO3) ceramic phase through a solid-solid diffusion reaction, the magnesium titanate ceramic phase is connected with coarse TiN or TiC particles after high-temperature sintering, and the anti-sticking coating for sintering is obtained. A relatively hard TiN or TiC shell is formed, so that the friction resistance and scratch resistance of the coating are improved, and the service life of the coating is prolonged. According to the sintering tray coated with the anti-sticking coating for sintering, the surface of the coating is free of peeling, cracking and other defects after sintering, the coating is completely reserved, the good and stable barrier effect is achieved, and the problems that impurities are likely to be introduced into an existing sintering anti-sticking coating, the sintering anti-sticking coating reacts with sintered alloy at the high temperature, and the performance of a sinter is deteriorated are solved.

The invention belongs to the technical field of materials, and particularly relates to a heat insulation coating of a drill rod and a preparation method of the heat insulation coating. 13 to 17 parts of hollow mullite microspheres; 10 to 14 parts of magnesium titanate-silicon carbide composite powder; 6 to 10 parts of silane modified aerogel powder; 6 to 8 parts of mullite whisker; 7 to 9 parts of NiCrAlY alloy powder; the zirconium oxide-mullite composite powder and the hollow mullite microspheres form a high-temperature stable porous matrix, crystalline phase transformation is avoided, the porosity of 30%-35% is maintained, and solid heat conduction is blocked; magnesium titanate-silicon carbide composite powder synergistically scatters and absorbs infrared radiation and inhibits the high-temperature thermal radiation heat transfer proportion, in the preparation method, plasma spraying parameters are accurately controlled, coating crystal phase transformation and aerogel sintering are avoided, and it is guaranteed that the coating is stable in high-temperature structure; the porosity and the infrared shading performance of the coating are not influenced by low-temperature annealing post-treatment, so that the heat conductivity coefficient of the heat insulation coating in the interval of 500-1000 DEG C is stabilized at 0.3-0.5 W / (m.K).

This invention belongs to the field of refractory materials technology, and relates to a magnesia-carbon core nozzle raw material composition and mass percentage as follows: 55-70% magnesia aggregate with a particle size of 1-0.047mm, 15-30% magnesium titanate with a particle size <0.047mm, 9-12% flake graphite with a particle size of 0.1-0.3mm, 2-3% carbon fiber powder with a particle size <0.047mm, and 1-3% antioxidant with a particle size <0.047mm; the bonding system of the magnesia-carbon core nozzle consists of phenolic resin powder, lithium carbonate, and furfural; after the raw materials and bonding system are mixed and granulated in a high-speed mixer, the billet is dried and the volatile matter is controlled appropriately, then added to the core nozzle mold for medium static pressure molding, and after demolding, the billet is cured and then heat-treated; during the heat treatment process, the magnesia aggregate and the magnesium titanate as the matrix are... m MgO· n TiO2 fine powder undergoes a solid-phase reaction, MgO+ m MgO· n TiO2→ x MgO· y TiO2, where 0.5 < x / y ≤2, magnesium oxide aggregate diffuses into the matrix through solid-phase diffusion, forming reactive annular gaps. This invention improves the mechanical properties and thermal shock resistance of the material.