657 results about "Barium titanate" patented technology

The invention discloses a high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film and a preparation method thereof. The high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film is prepared from the following raw materials in parts by weight: 100 parts of polypropylene; 17 to 36 parts of polyvinylidene fluoride; 3-12 parts of enhanced and improved talcum powder; 1-6.5 parts of modified barium titanate; 1-6 parts of a cross-linking agent; 2-10 parts of a compatilizer; and 0.05-2 parts of an initiator. The capacitor base film is high in mechanical strength, and has excellent high temperature resistance, thermo-oxidative aging resistance, high voltage resistance and anti-breakdown performance; the enhanced and improved talcum powder is constructed by taking expanded layer modified talc as a carrier and titanium dioxide-carbon dot composite particles as a loading component and grafting and coating the organic matter, so that the defects of the talcum powder can be overcome, and the improvement effect of the talcum powder on heat resistance, high-voltage resistance and breakdown resistance can be fully exerted; meanwhile, the system can be endowed with excellent thermo-oxidative aging resistance.

The invention discloses a method for preparing nano barium titanate based on sol-gel synergistic hydrothermal reaction, which comprises the following steps: (1) dissolving barium acetate in an acetic acid aqueous solution to obtain a barium source solution; weighing tetrabutyl titanate according to the molar ratio of barium to titanium being greater than 1.25, and dissolving the tetrabutyl titanate in alcohol to obtain a titanium source solution; (2) uniformly mixing the barium source solution and the titanium source solution, preserving heat at 20-80 DEG C to obtain gel, drying and grinding to obtain white powder of the barium titanate precursor: (3) preparing a 2-4mol / L inorganic strong alkali aqueous solution, adding the white powder and a dispersing agent into the inorganic strong alkali aqueous solution, and fully stirring to obtain a barium titanate precursor suspension; and (4) transferring the barium titanate precursor suspension into a reaction kettle for hydrothermal reaction, and after the reaction is completed, washing, drying and grinding to obtain the nano barium titanate powder. The preparation method is low in cost, and the prepared nano barium titanate powder is uniform in distribution, spherical or sphere-like in morphology, small in particle size, 80-150nm in average particle size and good in particle crystallinity.

The invention discloses a high-refractive-index nano-composite optical adhesive and a preparation method thereof, and belongs to the technical field of optical transparent adhesives. The optical adhesive is prepared by taking a polyurethane acrylate oligomer with a specific structure as matrix resin, introducing surface-modified barium titanate and zirconium oxide core-shell nanoparticles as a functional filler, and matching with an active diluent, a photoinitiator and a silane coupling agent in a specific proportion. Through the design of the core-shell structure, the core problems that the high-refractive-index nanoparticles are easy to agglomerate in an organic resin matrix, the dispersion stability is poor and the bonding force with a matrix interface is weak are effectively solved. The prepared optical adhesive has a refractive index of more than 1.65, a light transmittance of more than 99% and a haze of less than 0.3% after being cured, has excellent bonding strength, weather resistance and long-term use stability, and is especially suitable for precise lamination of high-end display devices (such as OLEDs (Organic Light Emitting Diodes) and micro-lens arrays).

The invention relates to a self-generating interbody fusion cage and a preparation method thereof, the interbody fusion cage comprises a porous tantalum support and bioactive piezoelectric ceramic arranged on the porous tantalum support, and the bioactive piezoelectric ceramic comprises hydroxyapatite and barium titanate; the preparation method comprises the following steps that the porous tantalum support is obtained through 3D printing, assembling positions of the bioactive piezoelectric ceramics are reserved on the upper surface and the lower surface of the porous tantalum support, the bioactive piezoelectric ceramics are embedded into the assembling positions of the upper surface and the lower surface of the porous tantalum support, and the weight ratio of barium titanate to hydroxyapatite is (92-98): (2-8). Compared with the prior art, the vertebral fusion cage has the advantages of promoting vertebral fusion by utilizing mechanical force in a human body to generate electricity, matching mechanical properties of a contact surface of the fusion cage, providing osteogenesis related ions, being relatively good in interface combination and the like.

The invention provides a Joule heat ultrafast sintering preparation method of barium titanate ceramic with ultrahigh dielectric constant and low loss, which comprises the following steps: ball-milling and mixing barium titanate powder and copper oxide powder, drying, pressing into a cake-shaped sample, carrying out cold isostatic pressing to obtain a sample piece, and carrying out vacuum treatment on Joule heat ultrafast sintering equipment to obtain the barium titanate ceramic with ultrahigh dielectric constant and low loss. Putting the sample preparation sheet between two layers of graphite felts, and starting Joule heat ultrafast sintering equipment to enable the graphite felts to generate Joule heat, so as to realize short-time sintering of the barium titanate ceramic. According to the invention, a Joule heat ultrafast sintering technology is adopted, and Joule heat is generated by directly applying voltage and current to the graphite felt, so that the sintering time is greatly shortened, and environmental pollution is avoided; meanwhile, the dielectric constant of the barium titanate ceramic is greatly improved by adding copper oxide, and the energy consumption is remarkably reduced.

The invention relates to the technical field of polymer composite materials, and discloses a nano-ceramic-based composite insulating coating and a preparation method thereof, and the coating is prepared from a composite resin matrix, a composite functional ceramic filler, a double-reactivity organosilicon linker and an initiator. Wherein the composite resin matrix is composed of vinyl-terminated polydimethylsiloxane and a vinyl ether functionalized fluorocarbon copolymer, and a soft and rigid interpenetrating network structure is formed. The composite functional ceramic filler is prepared from needle-shaped silicon nitride, flaky hexagonal boron nitride, nano silicon dioxide, nano cerium oxide and nano barium titanate. According to the invention, a chemical bonding interface is constructed between the inorganic filler and the organic resin, and the synergistic effect of the composite matrix and the multifunctional filler is optimized, so that the coating has excellent adhesive force, flexibility and thermal shock resistance, obtains high volume resistivity and breakdown strength, and meets the insulation protection requirements under harsh working conditions.

The invention provides a high-dielectric low-loss X7P type dielectric ceramic material and a preparation method and application thereof, and relates to the technical field of functional ceramic materials, the dielectric ceramic material is composed of a perovskite type compound as a main component and an auxiliary component; wherein the perovskite type compound contains a Ba element and a Ti element, and the auxiliary components comprise a first auxiliary component containing an Mg element, a second auxiliary component containing SiO2, a third auxiliary component containing an Mn element and a fourth auxiliary component containing a rare earth element R. According to the invention, barium titanate is doped and modified, so that the excellent performance of combining different compounds is realized, the dielectric constant and temperature stability of the dielectric ceramic material are improved, and the dielectric loss is reduced.

The invention provides a high-voltage low-loss dielectric material and a preparation method thereof, and relates to the technical field of high-voltage ceramic capacitors, and the high-voltage low-loss dielectric material comprises the following raw materials in parts by mass: 35-38 parts of barium titanate, 20-29.5 parts of strontium titanate, 15-17.5 parts of titanium dioxide, 9-12 parts of bismuth oxide, 3-4 parts of zirconium oxide, 0.8-1.0 part of X, 1.2-1.4 parts of antimony oxide, 1-1.2 parts of calcium carbonate and the like. The preparation method of the dielectric material comprises the following steps: 1, preparing the dielectric material; melting calcium carbonate, magnesium oxide, zinc oxide and the like, performing water quenching, and performing ball-milling granulation to obtain zinc borosilicate glass powder; uniformly mixing the zinc borosilicate glass powder with barium titanate, strontium titanate, titanium dioxide and the like, and granulating to obtain oxide powder; and tabletting and sintering the oxide powder to obtain the high-pressure low-loss dielectric material. The high-voltage low-loss dielectric material is high in dielectric constant, small in dielectric loss, high in compression strength and good in high-temperature stability, and the preparation method is simple.

The invention belongs to the technical field of ceramic materials, and particularly relates to a ceramic dielectric material and a preparation method and application thereof. The ceramic dielectric material provided by the invention is prepared from the following raw materials: barium titanate, calcium zirconate, a sintering aid and a modifier, the sintering aid is a Li-Zn-B-Si glass material; and the modifier comprises one or more of Nb2O5, MnCO3, MgO and RE2O3 (rare earth oxide). The ceramic dielectric material has the advantages of high-temperature stability, high dielectric constant, low loss and high insulating property.

The invention discloses a self-cleaning composite piezoelectric ceramic membrane as well as a preparation method and application thereof, and belongs to the field of composite ceramic membranes. The technical problem that an existing ceramic membrane separation technology is poor in biomembrane pollution resisting effect is solved. According to the preparation method, the barium titanate ceramic membrane is firstly prepared to serve as the base membrane, then the copper oxide one-dimensional nanostructure is loaded on the piezoelectric ceramic substrate, and the base membrane has a large membrane surface area and can be combined with more catalysts, so that more active sites are provided for catalytic reaction; according to the composite membrane, the hydrophilicity, the anti-pollution performance and the piezoelectric catalysis self-cleaning performance of the membrane are remarkably improved, and pollutants in water can be quickly and effectively separated, so that the flux and the anti-pollution performance of the membrane are improved.

The invention relates to the technical field of flexible electronics and sensing, in particular to a capacitive flexible pressure sensor based on a barium titanate composite dielectric layer, which sequentially comprises a lower electrode layer, an upper electrode layer, a lower electrode layer and an upper electrode layer from bottom to top, the composite dielectric layer is arranged on the lower electrode layer and is formed by compounding an elastic polymer matrix and a high-dielectric-constant barium titanate (BaTiO3) filler; the upper electrode layer is made of a flexible conductive material and is arranged on the composite dielectric layer; the lower electrode layer and the upper electrode layer are connected with an external capacitance measuring circuit through wires. According to the sensor disclosed by the invention, the comprehensive performance of high sensitivity, wide detection range, low hysteresis and excellent cycle stability is realized by optimizing the shape of the barium titanate filler, surface modification and composite structure design.

The invention relates to a thin film electro-optical crystal-silicon nitride heterogeneous integrated N * N high-speed optical switch array and a preparation method thereof. The thin film electro-optical crystal-silicon nitride heterogeneous integrated N * N high-speed optical switch array is formed by connecting 1 * 2 or 2 * 2 Mach-Zehnder high-speed optical switch units according to a certain topological structure. Wherein the high-speed optical switch unit is composed of a silicon nitride passive waveguide and a thin-film electro-optical crystal / silicon nitride heterogeneous integrated phase shift region. Comprising but not limited to thin-film lithium niobate, thin-film lithium tantalate, barium titanate and lead zirconate titanate is integrated above the silicon nitride phase shifting arm through a micro transfer printing method to form a heterogeneous integrated phase shifting region. The large-scale high-speed optical switch array with excellent performance is realized by combining the characteristics of ultra-low loss, CMOS compatibility, thermal stability and the like of a silicon nitride material, the characteristics of low power consumption, low loss, high-speed modulation and the like of a thin film electro-optical crystal and the advantages of high flexibility, parallel integration, low cost, low loss and the like of a micro transfer printing method.

The invention belongs to the technical field of lithium ion solid-state batteries, and relates to a composite polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method of the composite polymer electrolyte membrane comprises the following steps: generating a precursor salt containing Ba and Ti on the surface of an inorganic solid electrolyte through a wet chemical method, and forming a compact barium titanate coating layer on the surface of the electrolyte in a high-temperature calcination process to obtain the barium titanate surface modified inorganic solid electrolyte; uniformly dissolving a high-molecular polymer material, the barium titanate surface modified inorganic solid electrolyte and a lithium salt in a solvent, heating and stirring to prepare a uniform solution; and drying to form a membrane to obtain the polymer composite electrolyte membrane. Barium titanate has a special piezoelectric property and can be spontaneously polarized in a crystal structure to generate a polarization field, and the polarization field can sensitively sense the nonuniformity of lithium ion transmission dynamics and interact with the nonuniformity to balance the transmission process of lithium ions in the solid electrolyte, so that the bottleneck problem of ion migration in the traditional electrolyte is solved.

The invention relates to the field of ceramic materials, provides a high-voltage-resistant PTC (Positive Temperature Coefficient) thermal sensitive ceramic material as well as a preparation method and application thereof, and aims to improve the voltage resistance and PTC effect stability of thermal sensitive ceramic. The material is composed of aluminum oxide-coated manganese-doped barium titanate nanorods, hollow-core silicon dioxide microspheres and a glass phase sintering aid, and the electric heating performance and the microstructure stability are optimized by constructing a core-shell structure and a three-dimensional composite system. A hydrothermal method and a sol-gel method are adopted to precisely control a raw material structure, and alcohol dispersion, tape casting and weak oxidizing atmosphere sintering are combined, so that the compactness and consistency of the ceramic are ensured. The material is suitable for high-voltage temperature control elements and over-current protection devices, and is widely applied to the fields of new energy automobile battery pack over-temperature protection, high-voltage power equipment current limiting elements, industrial automatic temperature control switches and the like.

The invention relates to a method and a device for preparing piezoelectric catalytic degradation PFAS nano barium titanate from sludge graded extracts, and belongs to the technical field of sludge utilization environments. The method comprises the following steps: uniformly mixing fresh sludge and modified cation resin, and extracting a cation resin extracting solution to obtain the cation resin extracting solution and cation sludge; uniformly mixing the cation mud and the modified anion resin, and extracting an anion resin extracting solution to obtain the anion resin extracting solution and the cation mud; mixing the sludge and alkali for reaction to obtain an alkali extracting solution and extraction residues; mixing barium salt with the cation resin extracting solution to obtain a barium complexing solution, and mixing titanium salt with the anion resin extracting solution to obtain a titanium complexing solution; and mixing the barium complexing solution with the same volume of the alkali extracting solution, then adding the titanium complexing solution with the same molar ratio, heating, drying and calcining to obtain the piezoelectric catalytic degradation PFAS nano barium titanate. According to the method, multi-stage extraction can be carried out according to application property requirements, extraction is sufficient, the comprehensive utilization rate of sludge is high, dispersity is good, the particle size is small, piezoelectric catalysis performance is high, and synthesis cost is low.

The invention discloses a full-spectrum protective anti-fingerprint resin lens and a preparation method thereof. The full-spectrum protective anti-fingerprint resin lens comprises a functionalized resin base material and a gradient composite functional coating. The base material takes polyurethane acrylate as a matrix, and nano cerium oxide, nano barium titanate and nano tungsten oxide functional particles are uniformly dispersed through in-situ polymerization, so that base material intrinsic protection on ultraviolet rays, harmful blue light and near-infrared light is realized. The gradient coating comprises an adhesion promoting layer, a full-spectrum repairing and protecting layer and an anti-fingerprint layer from inside to outside, a stable composite system is formed through chemical bonding, protection is further reinforced, and the lens is endowed with super-hydrophobic and oleophobic anti-fingerprint characteristics. Through the integrated design of base material modification and coating compounding, the technical problems that an existing lens is single in protection wave band, not lasting in performance and prone to being stained with fingerprints are solved, and meanwhile the lens has high light transmittance, low reflection, excellent wear resistance and impact resistance and excellent comprehensive performance.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of high-dielectric-constant epoxy resin. The method comprises the following steps: (1) carrying out copolymerization reaction on bisphenol A epoxy resin and polytetrafluoroethylene at 80-100 DEG C for 2-3 hours; (2) adding a dicyandiamide curing agent into the reaction product obtained in the step (1), and carrying out gradient heating for curing; and (3) adding surface-modified barium titanate nanoparticles into the product obtained in the step (2), performing ultrasonic treatment, performing casting molding, and performing annealing treatment. According to the method, through molecular level design, the dielectric constant is remarkably improved while the excellent mechanical property of the epoxy resin is maintained, the dielectric loss (tan delta) and the thermal stability are optimized, and a high-performance base material is provided for electronic devices.

The invention discloses an ultrasonic activation type piezoelectric gel dressing and a preparation method and application thereof.The surface of a system is an antibacterial hydrogel layer, the antibacterial hydrogel layer is composed of polyethyleneimine (PEI) and polyvinyl alcohol (PVA) cross-linked hydrogel, and ultrasound and current can be transmitted to a deep area; bT-dNO piezoelectric nanoparticles are packaged inside, and BT-dNO is prepared by coating a nitric oxide (NO) donor on the surface of piezoelectric barium titanate (BT) subjected to hydroxylation and dopamine modification. Under the stimulation of low intensity focused ultrasound (LIFU), the donor can release NO as required, and the BT nanoparticles can generate reactive oxygen species (ROS) and output piezoelectric current. The dressing system has an effective combined repair effect, excellent biocompatibility and good anti-inflammatory ability.

The invention relates to the technical field of dielectric ceramic powder preparation processes, in particular to a multilayer ceramic capacitor, high-activity nano barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano barium titanate powder, and the method comprises the following steps: (1) reacting soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating the surfaces of the barium carbonate precursor particles with nano titanium dioxide particles by using a supercritical fluid flash evaporation technology to form a composite precursor; and (3) carrying out solid-phase synthesis reaction on the composite precursor, and sintering to obtain the nano barium titanate powder. Through the synergistic effect of two means of high-activity precursor preparation and nanoscale uniform coating, the composite precursor with extremely high specific surface area, surface energy and microcosmic uniformity is prepared, the thermal sintering temperature is effectively reduced, abnormal growth of crystal grains and lattice distortion are restrained, and the preparation method has the advantages that the preparation process is simple, and the preparation cost is low. The tetragonality of the nano barium titanate powder is obviously improved.

The present application relates to the technical field of dielectric ceramic powder preparation, and particularly relates to a multilayer ceramic capacitor, a high-activity nano-barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano-barium titanate powder, the method comprising the following steps: (1) reacting a soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating nano-titanium dioxide particles on the surface of the barium carbonate precursor particles by using a supercritical fluid flash technology to form a composite precursor; and (3) performing a solid-phase synthesis reaction on the composite precursor and sintering to obtain nano-barium titanate powder. The present application, through the synergistic effect of the two means of "high-activity precursor preparation" and "nano-level uniform coating", prepares a composite precursor with extremely high specific surface area, surface energy and micro-uniformity, effectively reduces the heat sintering temperature, suppresses abnormal grain growth and lattice distortion, and significantly improves the tetragonality of the nano-barium titanate powder.

The invention discloses a barium zirconate titanate-based ceramic capacitor dielectric material and a preparation method thereof. The ceramic material comprises the following components: (1-x) Ba (ZryTi1-y) O3-xCa (V2 / 3Mg1 / 3) O3, ZnO and MnO2, the preparation method comprises the following steps: firstly, mixing a Ba source, a Zr source, TiO2, a Ca source, V2O5 and a Mg source, then carrying out hydrothermal reaction, carrying out suction filtration and drying on the product to prepare main crystal phase powder, then adding MnO2 and ZnO into the main crystal phase powder, and carrying out grinding, granulation, molding, glue discharging and sintering to prepare the ceramic capacitor dielectric material. According to the ceramic material disclosed by the invention, the aims of improving the dielectric temperature stability of a capacitor ceramic dielectric and reducing the dielectric loss are fulfilled through the combined action of an A and B site ion compound perovskite compound system consisting of barium zirconate titanate and calcium vanadium magnesium acid and the secondary dopant.

The invention relates to the technical field of special cables, and discloses a high and low temperature resistant composite insulating layer cable and a preparation method thereof.The cable comprises a conductor core and a composite insulating layer wrapping the conductor core, and the composite insulating layer comprises a high temperature resistant heat conduction core layer and a low temperature resistant elastic layer; the high-temperature-resistant heat-conducting core layer is prepared from the following raw material: polyamide acid; hexagonal boron nitride; alpha-phase silicon carbide; the preparation method comprises the following steps: adding gamma-amino propyl triethoxy silane; nano barium titanate; the low-temperature-resistant elastic layer is prepared from the following raw materials: vinyl terminated polydimethylsiloxane; performing hydrophobic treatment on fumed silica; a Karstedt catalyst; a hydrogen-containing silicone oil crosslinking agent; the average particle size D50 of the 1-ethynyl-1-cyclohexanol and the alpha-phase silicon carbide is 0.5 to 2 mu m. According to the invention, by adopting a microwave selective heating and interlayer heat conduction mechanism, efficient and high-quality integrated curing of the composite insulating layer is realized.

The invention discloses a method for preparing a piezoelectric catalytic ceramic membrane at low temperature based on nano-particle modified rod-like barium titanate powder, which comprises the following steps: preparing nano-particle modified rod-like BaTiO3 powder from Bi4Ti3O12, BaCl. 8H2O, sodium oleate, deionized water and a NaOH solution, granulating, pressing and calcining to obtain a ceramic membrane product, and further carrying out electric polarization to obtain the piezoelectric catalytic ceramic membrane. The rod-like BaTiO3 powder of the nanoparticles with high surface activity not only ensures the mechanical strength of the ceramic membrane, but also effectively reduces the firing temperature. Meanwhile, the surface of the prepared ceramic membrane is of a wormlike curved surface structure, the pore size distribution is uniform, the stable separation performance is achieved, and the catalytic degradation function is achieved after electric polarization. The method is green and energy-saving, and the product can be applied to the fields of solid / gas and liquid separation, water environment restoration and the like, and has good application value.

The invention belongs to the technical field of preparation of barium titanate, and particularly relates to a preparation method of a defect-regulating barium titanate composite material, which comprises the following preparation steps: S1, adding a proper amount of barium carbonate, titanium dioxide, nickel oxide and dopant mixed powder into a ball milling tank for ball milling to obtain initial barium titanate composite particles; s2, dispersing the initial barium titanate composite particles obtained in the step S1 into an aqueous solution of a growth inhibitor for reaction to form modified barium titanate composite powder; and S3, mixing the barium titanate composite powder obtained in the step S2 with an adhesive polyvinyl butyral, pressing into a biscuit, performing cold isostatic pressing, sintering, annealing in a nitrogen atmosphere, and performing heat preservation to obtain the defect-regulated barium titanate composite material.

The invention discloses a utilization method of a waste carbon fiber reinforced resin-based composite material and a belt mortar type rubbing and grinding activation machine, and belongs to the field of waste recycling. Carrying out rubbing friction catalysis and ultrasonic piezoelectric catalytic activation on the waste carbon fiber reinforced resin-based composite material and the barium titanate turbid liquid by adopting a rubbing and grinding activation machine with a mortar, then spraying an activating agent solution, and continuously soaking, rubbing and activating to obtain the modified waste carbon fiber reinforced resin-based composite material. And carrying out variable-pressure gradient heating carbonization activation to prepare the activated carbon barium titanate composite adsorption catalyst. According to the method, barium titanate piezoelectricity and friction catalysis coupled mechanical rubbing are adopted to activate a carbon fiber reinforced resin-based composite material, the stability of the carbon fiber reinforced resin-based composite material is reduced, the difference between carbonization activation conditions and performance of resin and carbon fibers is reduced, carbonization is controlled by adopting pressure transformation and temperature combination, and the activated carbon barium titanate composite adsorption catalyst is obtained. The method can be used for treating heavy metal-containing organic wastewater, new pollutant wastewater and waste gas.

The invention relates to the technical field of epoxy resin encapsulating materials and preparation, in particular to an epoxy resin encapsulating material with a high dielectric constant and a preparation method of the epoxy resin encapsulating material. The epoxy resin encapsulating material comprises the following raw materials in parts by weight: 90-100 parts of bisphenol A epoxy resin, 30-50 parts of dielectric filler, 1-3 parts of modified carbon nanotubes, 5-8 parts of ionic liquid, 25-30 parts of a curing agent, 1-3 parts of a flatting agent and 2-4 parts of an anti-settling agent. The epoxy resin encapsulating material prepared by taking the epoxy resin, the dielectric filler and the modified carbon nanotubes as main raw materials has high dielectric constant, low dielectric loss and good mechanical properties. The dielectric constant and compressive strength of the material can be improved through the barium titanate nanowires with the high length-diameter ratio, interface defects can be reduced through the reaction of the modified carbon nanotubes and the epoxy resin, the dielectric constant of the material is jointly improved, and meanwhile the dispersity of the material in matrix distribution is improved.

The invention discloses a high-magnification sodium ferric phosphate pyrophosphate-barium titanate positive electrode material and a preparation method thereof, the high-magnification sodium ferric phosphate pyrophosphate-barium titanate positive electrode material comprises nano barium titanate compounded with sodium ferric phosphate pyrophosphate in situ, the sodium ferric phosphate pyrophosphate is of a porous structure, and the mass ratio of barium titanate in the porous sodium ferric phosphate pyrophosphate is 0.5-6 wt%. The nano barium titanate is introduced into the porous ferric sodium phosphate pyrophosphate through an in-situ compounding technology, so that the rate capability, the cycle capability and the ionic conductivity of the ferric sodium phosphate pyrophosphate-barium titanate positive electrode material are remarkably improved, and the rate capability during high-current charging and discharging is particularly optimized; and effective support is provided for high-power output in a short time and stability of long-time circulation.

The invention discloses a preparation method of a high-performance electric-breakdown-resistant capacitor base film, which comprises the following steps: S1, preparing modified polypropylene master batch: mixing polypropylene, a cycloolefin copolymer, a barium titanate-carbon nanotube modified composite filler and an antioxidant, and carrying out melt blending, extrusion and granulation to obtain the modified polypropylene master batch; s2, carrying out melt extrusion on the modified polypropylene master batch, cooling and casting; s3, carrying out two-way stretching and heat setting on the obtained casting piece to obtain a polypropylene film; and S4, performing plasma treatment on the surface of the polypropylene film to obtain the high-performance electric-breakdown-resistant capacitor base film. The high-performance electric-breakdown-resistant capacitor base film prepared by the method has excellent electric breakdown resistance, mechanical strength, flame retardance and heat resistance, has a long-acting flame retardant effect, is excellent in comprehensive performance and has a wide market application prospect.

The invention provides an anti-reduction bias voltage stable type dielectric material. The dielectric material comprises a main body material, a sintering aid and auxiliary components, wherein the main body material comprises barium titanate with the particle size of 100-150nm, the sintering aids comprise silicon oxide and magnesium oxide, and the auxiliary components comprise oxides of rare earth elements, manganese oxide and zirconium oxide. On the other hand, the invention further provides a preparation method of the dielectric material.

The invention relates to the technical field of barium titanate production and preparation, in particular to a barium titanate spherical powder production method. The preparation method comprises the following steps: preparing and atomizing a precursor solution, then spraying the atomized precursor solution into a high-temperature reaction furnace for flame melt crystallization, and then carrying out gradient cooling and spherical curing in a cooling area of the high-temperature reaction furnace, and finally, grading and collecting the prepared spherical barium titanate powder through a collecting system to obtain spherical barium titanate powder with uniform particle size, and carrying out surface functionalization treatment on the collected spherical barium titanate powder through a coating unit to obtain surface-coated spherical barium titanate powder. The precursor solution is subjected to solvent evaporation, thermal decomposition and flame melting in a high-temperature reaction furnace to form barium titanate crystal nucleuses, the crystal nucleuses naturally shrink to form balls under the driving of surface tension, the defect of mechanical damage of a traditional solid phase method or the defect of agglomeration of a liquid phase method is overcome, the crystal defects of the crystal nucleuses are reduced, and meanwhile particle size distribution is more uniform.