134 results about "Calcium titanate" patented technology

A dielectric ceramic composition includes a first crystal grain that has a perovskite structure expressed by a general formula of BaCaTiO3, and has a core portion and a shell portion surrounding the core portion and including a rare earth element and manganese, and a second crystal grain in which an elemental ratio of total of barium and calcium to titanium is 0.70 or less and a main component is barium calcium titanate.

Disclosed is a curable composition which contains: a curable component that is radically polymerizable and contains an ethylenically unsaturated double bond; and an inorganic filler that is at least one substance which is selected from the group consisting of titanium oxide, calcium titanate and strontium titanate.

This resin composition for molding comprises a curable resin and an inorganic filler containing alumina particles and at least one of calcium titanate particles and strontium titanate particles. The total content of the calcium titanate particles and the strontium titanate particles is 5.0 vol% to 15.0 vol% with respect to the whole inorganic filler, and the content of the whole inorganic filler exceeds 60 vol% with respect to the whole resin composition for molding.

A resin composition for molding, comprising a curable resin and an inorganic filler, the inorganic filler comprising silica particles and / or alumina particles and calcium titanate particles, the content of the calcium titanate particles being 10 vol% or more and less than 30 vol% with respect to the total amount of the inorganic filler, and the content of the calcium titanate particles being 10 vol% or more and less than 30 vol% with respect to the total amount of the inorganic filler. The total content of the inorganic filler is more than 60 vol% with respect to the total amount of the molding resin composition.

The invention provides a blasting hole sealing waterproof material with a low reaction temperature and a rapid solidification function, and belongs to the technical field of hole sealing materials. The blasting hole sealing waterproof material comprises a component A and a component B, the component A is prepared from magnesium oxide, metakaolin, calcium fluotitanate, lithium carbonate, nano zirconium oxide and water; the component B is prepared from monopotassium phosphate, borax, lithium phosphate, superfine calcium carbonate and polytetrafluoroethylene particles. The two components are mixed according to the volume ratio of 1: 1. The material can be rapidly solidified at a low reaction temperature, the compression resistance and the impermeability are remarkably improved, the material is suitable for occasions such as underground engineering, tunneling and coal mine excavation, and the problem that the performance of an existing hole sealing material is reduced under moisture permeation is solved. In addition, the adopted preparation method is simple and easy to implement, and the excellence and the application effect of the material are ensured.

The invention provides filling slurry, a corrosion-resistant long-service-life sagger and a preparation method and application of the sagger, and relates to the technical field of sagger preparation. The filling slurry comprises the following raw materials in percentage by mass: 40-60% of solid aggregate, 25-35% of a binder and the balance of a dispersing agent; the solid aggregate comprises a component A and a component B; the component A comprises one or more of aluminum oxide powder, magnesium oxide powder, zirconium oxide and silicon oxide; the component B comprises one or more of calcium titanate, calcium zirconate, silicon carbide and boron carbide. Through cooperation of the component A and the component B, the mechanical strength of the filling slurry is increased, the thermal expansion coefficient is reduced, and the corrosion resistance and the thermal shock stability are enhanced.

The invention relates to ultra-sensitive and conformal electronic skin based on a microporous structure and a preparation method, and aims to improve the sensitivity and the wearable performance of the electronic skin for sensing and monitoring. According to the main scheme, sodium chloride soluble crystal particles with microscale and copper calcium titanate nanoparticles with giant dielectric constant are prepared. The soluble sodium chloride crystal particles are combined with a polydimethylsiloxane matrix formed by mixing calcium copper titanate nanoparticles, an organic / inorganic composite film is obtained in a silk-screen printing mode, then the film is immersed in water, the soluble sodium chloride crystal particles are etched away, and the compressible microporous film is obtained. The upper and lower surfaces of the film are sprayed with electrodes and are connected with leads to prepare the ultra-sensitive electronic skin. The electronic skin has high sensitivity and high linearity, is not influenced by environment temperature and humidity, can detect dynamic load, and is suitable for the flexible wearable field.

The application provides a high-thermal-conductivity radiation refrigeration coating for a 5G communication base station cabinet and a preparation method thereof, and belongs to the technical field of coatings. A SiC@BN / TiB2 three-phase fiber framework obtained through three-stage calcination is bonded with methylphenyl silicone resin through a silane coupling agent to form a longitudinal high-speed thermal conduction framework. Starburst calcium titanate and edge in-situ magnesium fluoride form a refractive index ladder and a rough multi-faceted structure, which not only reflects ultraviolet-near infrared light, but also endows weather resistance. Holmium / ytterbium co-doped calcium fluoride nanosheets are transversely overlapped to scatter near infrared light and convert the near infrared light into medium-far infrared radiation which can penetrate the atmospheric window, thereby further dissipating heat. Through mutual cooperation of a longitudinal continuous heat conduction path, a transverse heat dissipation network, optical multiple scattering and energy downshift radiation, stable chemical bond network support is achieved to realize high-efficiency, long-term reliable heat dissipation performance.

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

To provide a dielectric ceramic composition and a laminated ceramic electronic component which suppress changes in capacitance due to firing temperature and have high insulation properties in a wide firing atmosphere.SOLUTION: Disclosed is a dielectric ceramic composition comprising: first crystal particles having a perovskite structure represented by general formula ABO3 and having a core portion and a shell portion covering the core portion and containing a rare earth element and manganese; and second crystal particles having barium calcium titanate as a main component and having an element ratio of the sum of barium and calcium to titanium of 0.70 or less.SELECTED DRAWING: Figure 1

The invention relates to the technical field of titanium slag separation, in particular to a method for separating perovskite and preparing a battery material based on blast furnace titanium slag. According to the method, the silicate mineral phase in the blast furnace titanium slag is reconstructed so that the silicate mineral phase can be completely dissolved by acid, meanwhile, low-valence titanium in the silicate mineral phase is oxidized into high-valence titanium, the high-valence titanium is enriched in the perovskite phase, and then separation and purification of CaTiO3 in the titanium slag are achieved; furthermore, sodium titanate hydrate and calcium titanate hydrate with porous network structures are loaded on the surface of the separated and purified CaTiO3, so that the bonding strength of the CaTiO3 and the polyethylene diaphragm can be enhanced, and the thermal stability of the solid electrolyte interface layer of the lithium battery prepared on the basis of the high titanium slag is further improved. In a word, the invention not only provides a new method for separating and purifying the blast furnace titanium slag, promotes high-value utilization of the blast furnace titanium slag, but also provides a new thought and method for preparing the solid electrolyte interface layer of the lithium battery, and has a wide application prospect.

The invention belongs to the technical field of electronic materials, and particularly relates to a calcium titanate composite wave-absorbing material and a preparation method thereof. The material comprises the following components: a carbon material, metal powder, calcium titanate and organic silicon resin. The preparation method comprises the steps of blending, ball milling, polymerization molding and the like. The material has a three-layer structure, namely a calcium titanate resin layer, a calcium titanate low-carbon resin layer and a calcium titanate high-carbon resin layer. The effective bandwidth with the wave absorbing efficiency smaller than or equal to-10 dB covers the whole S wave band, the lowest wave absorbing efficiency is-31.5 dB, the preparation process is simple, raw materials are easy to obtain, and the material has application potential in the fields of 5G technology electromagnetic compatibility and equipment electromagnetic stealth.

The invention belongs to the technical field of coating preparation, and provides a high-thermal-conductivity radiation refrigeration heat dissipation coating for an LED illumination module and a preparation method of the high-thermal-conductivity radiation refrigeration heat dissipation coating. The preparation method comprises the following steps: firstly, cooperatively coating a hexagonal boron nitride sheet with dopamine and tannic acid, and performing in-situ deposition of zinc oxide to obtain a sheet-shaped heat-conducting filler with low interface thermal resistance; secondly, hydrothermally generating magnesium silicate by utilizing the lignocellulose template, locally carbonizing in a nitrogen atmosphere, and grafting aminopropyl silane to form a heat-conducting framework; ytterbium-doped calcium titanate hollow spheres are prepared through a citric acid complexation method, an aluminum oxide-phosphate double-layer shell is constructed, three kinds of functional particles are dispersed with methyl-phenyl siloxane resin, a coupling agent and a low-volatility solvent at a high speed according to a set proportion, and the high-thermal-conductivity radiation refrigeration heat dissipation coating of the LED illumination module is obtained after vacuum defoaming.

The invention provides a preparation method of high-density ZTA ceramic granulation powder, which comprises the following steps: mixing aluminum oxide powder, nano zirconium oxide and calcium titanate powder according to a certain proportion, dispersing in deionized water, carrying out ball milling, and adding a binder, a dispersant, a release agent and a defoaming agent during ball milling; and finally, sieving the ball-milled slurry by using a 90-mesh sieve, performing spray granulation by using centrifugal spray granulation equipment, and screening granulation powder under a 100-mesh sieve to obtain the ZTA ceramic powder. By introducing calcium titanate as a sintering aid, the sintering temperature of the ZTA ceramic is successfully reduced to 1500 DEG C from 1600 DEG C or above, a glass phase generated by a traditional aid is avoided during sintering, flaky calcium hexaluminate is generated in situ, grains can be refined, crack deflection can be induced, and high density of 98.4% or above is realized, so that the toughness and strength of the material are synergistically improved.

The invention provides submerged arc sintered flux for welding SA-508Gr. 3C1.1 steel in third-generation nuclear power equipment and a preparation method of the submerged arc sintered flux. The submerged arc sintered flux comprises, by weight, 20-40 parts of fluorite, 35-50 parts of magnesia, 15-30 parts of aluminum oxide, 10-20 parts of wollastonite, 1-5 parts of silica powder, 0.5-2 parts of silicon iron, 2-5 parts of manganese ore, 1-5 parts of calcium titanate and 1-5 parts of rare earth materials. And the water glass accounts for 25-30% of the sum of the flux powder. The flux provided by the invention has good welding manufacturability, excellent slag removal, beautiful formation and more excellent mechanical properties.

Disclosed is a method for preparing porous adsorbent material (22), the method comprising providing a mixture of metakaolin (10) and calcium titanate (12, CaTiO3), mixing the mixture with alkali solution (14) and reacting to obtain alkali-activated modified material (16), providing oil comprising oleic acid (18) as a foaming agent to the alkali-activated modified material (16), and providing hydrogen peroxide (20) as a foaming agent to the alkali-activated modified material (16), and allowing the alkali-activated modified material to foam in the presence of the hydrogen peroxide to obtain porous adsorbent material (22) comprising alkali-activated titanate-modified metakaolin. Also disclosed is porous adsorbent material comprising alkali-activated titanate-modified metakaolin, a flow- through column (24) comprising the porous adsorbent material and system for treating contaminated water.

The present invention belongs to the technical field of core coating preparation, and particularly relates to a core coating for aluminum alloy castings and a preparation method thereof. The core coating for aluminum alloy castings consists of the following raw materials: pyrophyllite, fayalite, zircon powder, magnesia, calcium titanate, cryolite, phosphorus pentoxide, sodium pyrophosphate, rectorite, octylphenol polyoxyethylene ether, n-octanol, and water. The core coating for aluminum alloy castings of the present invention uses a mixture of pyrophyllite, fayalite, zircon powder, calcium titanate, magnesia, cryolite, and phosphorus pentoxide as refractory materials, water as a carrier liquid, a mixture of sodium pyrophosphate and rectorite as a suspending agent, and simultaneously adds an n-octanol defoamer and an octylphenol polyoxyethylene ether surfactant. The synergistic effect between the raw materials ensures that the prepared core coating has good resistance to metal liquid erosion, anti-adhesion to sand, and thermal stability during application, thereby enabling the core coating to have excellent stripping strength and refractoriness.

A ceramic electronic component, includes: a body including a dielectric layer and first and second internal electrodes alternately disposed with the dielectric layer interposed therebetween in a first direction; a first external electrode connected to the first internal electrode; and a second external electrode connected to the second internal electrode, wherein the body includes a capacitance formation portion including the first and second internal electrodes, and a cover portion disposed on both end surfaces of the capacitance formation portion in the first direction, the dielectric layer includes BaTiO3 and (Ba1-xCax)TiO3(0.01≤x≤0.15), and the cover portion includes BaTiO3, and in a cross-section of the body in the first and third directions, a ratio of an area occupied by pores in the cover portion is S1, and a ratio of an area occupied by pores in the dielectric layer of the capacitance formation portion is S2, S1<S2.

The invention discloses a preparation method of a mold shell for titanium alloy investment casting, and belongs to the technical field of titanium alloy precision casting. According to the high-stability zirconium oxide-based surface layer coating for titanium alloy investment casting and the preparation method of the mold shell of the high-stability zirconium oxide-based surface layer coating, firstly, silica sol, micron-sized yttrium oxide stabilized zirconium oxide powder, micron-sized calcium titanate powder, a wetting agent and a defoaming agent are mixed to prepare slurry, the slurry is used for preparing the first two layers of a wax mold, and sanding is conducted; then mixing silica sol, micron-sized mullite powder, a wetting agent and a defoaming agent to prepare slurry, preparing the rear six layers of a coated wax mold and sealing slurry by using the slurry, and finally performing steam dewaxing and sintering to obtain the mold shell. The method solves the problem that a high-activity molten titanium alloy reacts with a mold shell surface layer material in the casting process, so that a brittle layer on the surface of a casting is too large; the surface-based coating and the mold shell prepared from the surface-based coating are mainly suitable for precision casting of titanium alloy and have good industrial application prospects.

The invention discloses a method for preparing a photocatalytic membrane with a hydrophilic and light trapping dual-function microstructure by using pulse laser, which comprises the following steps: firstly, blending a calcium titanate and graphene oxide composite material (CTO / rGO composite material) prepared by laser liquid phase ablation with polyvinylidene fluoride (PVDF) by using a blending method to prepare a CTO / rGO photocatalytic membrane; and then the surface of the CTO / rGO photocatalytic membrane is etched by pulse laser to obtain a pattern microstructure surface with double functions of hydrophilicity and reflection resistance, so that the reusability of the photocatalyst is improved, the photocatalytic degradation effect is enhanced, and the long-term stable photocatalytic degradation capability of the photocatalyst is maintained.

A porous particulate nanocomposite material comprising, as determined by X-ray diffraction: carbon; an orthorhombic CaTiO3 crystalline phase; and, a rhombohedral MgTiO3 crystalline phase. Based on the total number of atoms in the nanocomposite material and as determined by energy dispersive X-ray spectroscopy (EDX): the atomic concentration of carbon (C) is from about 1 to about 5 atom % (at. %); the atomic concentration of titanium (Ti) is from about 20 to about 35 at. %; the atomic concentration of magnesium (Mg) is from about 5 to about 15 at. %; and, the atomic concentration of calcium (Ca) is from about 5 to about 15 at. %.

Provided are: a spherical calcium titanate powder exhibiting excellent resin-filling properties and with which a higher relative permittivity and low dissipation factor can be achieved; and a resin composition including said spherical calcium titanate powder.　The spherical calcium titanate powder has a ratio (D50 / BET) of the average particle size (D50: μm) to the specific surface area (BET: m2 / g) of 10-20. The resin composition includes said spherical calcium titanate powder, and at least one resin selected from thermoplastic resins and thermosetting resins.

A resin composition for molding, which contains a curable resin and an inorganic filler that contains alumina particles and calcium titanate particles and / or strontium titanate particles, the total content of the calcium titanate particles and the strontium titanate particles being 5.0-15.0 vol% with respect to the entire inorganic filler, and the content of the calcium titanate particles and the strontium titanate particles being 5.0-15.0 vol% with respect to the entire inorganic filler. The content of the entire inorganic filler is more than 60 vol% with respect to the entire molding resin composition.

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 present disclosure provides: a spherical calcium titanate powder which has excellent resin filling properties and can achieve a higher relative dielectric constant and a low dielectric loss tangent; and a resin composition containing the spherical calcium titanate powder. This spherical calcium titanate powder has an average particle diameter (D50) of 4-10 [mu] m, and the proportion of particles having a particle diameter of 2.0 [mu] m or less is 4.0 vol% or less. Wherein the average particle diameter (D50) is calculated from a particle size distribution obtained by laser diffraction / scattering particle size distribution measurement. A resin composition according to the present disclosure contains the spherical calcium titanate powder and at least one resin selected from the group consisting of thermoplastic resins and thermosetting resins.

The present invention addresses the problem of providing a calcium titanate particle material in which changes in chromaticity due to irradiation with ultraviolet light are suppressed. This calcium titanate particle material has a circularity of 0.8 or more, a volume average particle diameter ([mu] m), and a specific surface area (b (m2 / g)), a being 0.1-8, and ab being less than 4. With this configuration, the relationship between the volume average particle diameter and the specific surface area can be rationalized, and as a result, the change in chromaticity over time can be suppressed.

The present application provides a filling slurry, a corrosion-resistant and high-life sagger, and a preparation method and application thereof, and relates to the technical field of sagger preparation. The raw materials of the filling slurry are calculated by mass ratio of 100%, including: 40%-60% solid aggregate, 25%-35% binder, and the rest is dispersant; the solid aggregate includes component A and component B; component A includes one or more of aluminum oxide powder, magnesium oxide powder, zirconium oxide, and silicon oxide; component B includes one or more of calcium titanate, calcium zirconate, silicon carbide, and boron carbide. Through the combination of component A and component B, the mechanical strength of the filling slurry is increased, the thermal expansion coefficient is reduced, and the corrosion resistance and thermal shock stability are enhanced.

A new material that may be embodied in a wafer. The wafer may include a silicon (Si) substrate. The wafer may also include a strain control layer formed on the Si substrate. The strain control layer may include strontium titanate (STO) or calcium titanate (CTO). The wafer may further include a twin-free perovskite oxide layer formed on the strain control layer and having a residual in-plane biaxial tensile strain imposed at least in part by the strain control layer. The twin-free perovskite layer may include a single crystal rare earth aluminate.

The application discloses an environment-friendly ceramic and a preparation method thereof, and belongs to the field of ceramics. The method comprises the following steps: dissolving zinc nitrate, zirconium nitrate and iron nitrate in a solvent and stirring and mixing to obtain a mixed solution; grinding and mixing kaolin, illite, magnesium oxide, iron titanate, calcium titanate, titanium, silicon powder, carbon powder and aluminum oxide, and adding into the mixed solution to mix to obtain a first slurry; taking the first slurry, adding zinc oxide and iron oxide into the taken first slurry to mix to obtain a second slurry; adding kaolin, zirconium oxide, boron carbide, carbon powder, boron oxide, aluminum, boron, titanium, silicon and titanium dioxide into a dispersing solvent to mix to obtain a third slurry; and performing sintering treatment on the prepared embryo to obtain the ceramic. The ceramic has high mechanical strength, good corrosion resistance, good antibacterial property, is not prone to cracking or damage when the external temperature changes rapidly, has stable overall performance, and has high durability.

The application belongs to the technical field of textile machinery preparation, and particularly relates to a calcium titanate-based anti-static ceramic guide and a preparation method thereof. The calcium titanate-based anti-static ceramic guide comprises the following components in percentage by mass: 72-95% of calcium titanate and 5-28% of a functional additive, wherein the functional additive comprises titanium nitride and zirconium nitride; the preparation method comprises the following steps: S1: mixing calcium titanate powder, titanium nitride powder and zirconium oxide powder, and mixing and granulating the mixed powder with an organic matrix to obtain injection granules, and injection molding to obtain a ceramic guide blank containing the organic matrix; S2: performing heat debinding on the ceramic guide blank, and then performing high-temperature reaction under a nitrogen atmosphere to obtain a ceramic guide sintered body; and S3: performing hot isostatic pressing treatment on the ceramic guide sintered body. The CaTiO3 is used as a matrix, the functional additives TiN and ZrN are combined, and the anti-static ceramic guide with good wear resistance, electrical conductivity and anti-static capability is obtained.