333 results about "Zinc ferrite" patented technology

The invention belongs to the field of soft magnetic ferrite, and discloses a high-frequency low-loss manganese zinc ferrite material and a preparation method thereof, and the manganese zinc ferrite material comprises main components and auxiliary components. The main components comprise ferric oxide, zinc oxide, manganese oxide and cobaltosic oxide. The auxiliary components comprise calcium carbonate, silicon dioxide and tantalum pentoxide. The preparation method of the manganese zinc ferrite material comprises the following steps: proportioning, drying and ball-milling; pre-sintering is performed; performing secondary ball milling; performing granulation; forming is conducted; sintering is performed; and performing thermal aging. The manganese-zinc ferrite prepared by the invention has relatively low power loss under a high-frequency condition, and can be applied to the field of electronic materials related to power conversion, such as transformers and inductors.

The invention provides a nickel-zinc ferrite material as well as a preparation method and application thereof. The nickel-zinc ferrite material comprises main components and auxiliary components, the main components comprise 65.8 to 67.8 wt% of Fe2O3, 6.8 to 7.5 wt% of NiO, 16.5 to 17 wt% of ZnO and 6.2 to 8.5 wt% of CuO, and the auxiliary components comprise Bi2O3, MgO and nano SiO2, and the main components comprise the following components in percentage by mass: 65.8 to 67.8 wt% of Fe2O3, 6.8 to 7.5 wt% of NiO, 16.5 to 17 wt% of ZnO and 6.2 to 8.5 wt% of CuO. The nickel-zinc ferrite material has the excellent performance of high frequency, low power consumption and high Tc, the problem of high loss of the nickel-zinc ferrite material under the high-frequency condition is solved, the output stability applicability of the inductor at the high frequency is improved, and the nickel-zinc ferrite material can be applied to the fields of avionics, automotive electronics and communication electronics.

The invention relates to a manganese zinc ferrite material and a preparation method thereof, the manganese zinc ferrite material comprises main components and auxiliary components, the main components comprise Fe2O3, ZnO and MnO, and the auxiliary components comprise CoO, CaO, Bi2O3 and MoO; and in the main components, the content of Fe2O3 is 52.0 to 53.0 mol percent, the content of ZnO is 18.0 to 19.0 mol percent, and the content of MnO is 28.0 to 30.5 mol percent in terms of mole percent. According to the manganese-zinc ferrite material, the initial permeability mu i is greater than or equal to 12000 in a wide temperature range of 0-145 DEG C, and the manganese-zinc ferrite material has a relatively low temperature coefficient in the temperature range; the magnetic conductivity does not drop under the high frequency of 300kHz, and mu i is greater than or equal to 9000; the Curie temperature Tc is greater than 145 DEG C, so that the stability of the manganese-zinc ferrite material applied to the field of automotive electronics or a conventional anti-EMI common-mode filter is greatly improved.

This invention relates to a method for the combined leaching of high-silicon zinc roasted ore and high-sulfur zinc oxide powder, belonging to the field of hydrometallurgical technology. The high-sulfur zinc oxide powder is leached neutrally to obtain zinc oxide leaching residue and zinc powder leaching solution. The zinc powder leaching solution is then mixed with high-silicon zinc roasted ore slurry for controlled silica leaching of the high-silicon zinc roasted ore to obtain zinc ore leaching residue and zinc ore leaching solution. The zinc powder leaching residue and zinc ore leaching residue are mixed and then subjected to low-acid leaching to obtain low-leaching residue and low-leaching solution. The low-leaching residue is then subjected to hot acid leaching to obtain hot-leaching residue and hot-leaching solution. The hot-acid residue is then subjected to high-acid leaching to obtain lead-silver slag product and high-leaching solution. The hot-leaching solution is neutralized and reduced by high-sulfur zinc oxide powder to obtain neutralized solution and neutralized residue. The neutralized solution is then subjected to mineralization and iron precipitation to obtain hematite product and iron-removed solution. This invention can effectively control the leaching of silicon in the high-silicon zinc roasted ore leaching process, and simultaneously realize the oxidative leaching of sulfides in zinc oxide powder and the reductive leaching of zinc ferrite in zinc roasted ore, thus simplifying the leaching process of zinc roasted ore and zinc oxide powder.

A preparation method of a broadband low-loss high-Bs power manganese zinc ferrite material relates to an electronic material technology, and comprises the following steps: step 1, taking Fe2O3, ZnO and MnO as raw materials, and batching; step 2, performing primary ball milling on the ingredients obtained in the step 1, and then drying and sieving to obtain a primary ball-milled material; step 3, pre-sintering; step 4, by taking the mass of the pre-sintered material obtained in the step 3 as a standard, adding 0.02 to 0.04 weight percent of V2O5, 0.02 to 0.04 weight percent of Nb2O5, 0.02 to 0.04 weight percent of ZrO2, 0.04 to 0.07 weight percent of TiO2 and 0.01 to 0.03 weight percent of YIG, so as to obtain doped mixed powder; step 5, secondary ball milling; step 6, granulating; step 7, pressing the granulated material into a green body part; and step 8, sintering the green body by stages. According to the invention, the initial permeability is improved while the resistivity of the power manganese-zinc ferrite is improved.

The invention belongs to the field of photocatalytic material preparation, and particularly relates to a ZnFe2O4 / TiO2 / BC composite material as well as a preparation method and application thereof. The novel photocatalytic material ZnFe2O4 / TiO2 / BC composite material is prepared through a sol-gel method and a coprecipitation method, the photocatalytic performance of titanium dioxide and zinc ferrite is improved, and the application field of titanium dioxide and zinc ferrite is widened. The dopant provided by the invention is relatively low in price, the process is relatively simple, and the photocatalyst with a wider light absorption range can be prepared and can be used for degrading sulfamethoxazole.

The invention relates to the technical field of manganese zinc ferrite materials, and particularly discloses a manganese zinc ferrite high-frequency high-impedance material and a preparation process thereof. The manganese zinc ferrite high-frequency high-impedance material is prepared from the following raw materials: Fe2O3, Mn3O4, ZnO, a carbon nanotube loaded rare earth oxide composite material, P2O5, Co2O3 and CaCO3. The preparation raw materials of the carbon nanotube loaded rare earth oxide composite material comprise a multi-walled carbon nanotube and a rare earth salt, and the mass ratio of the multi-walled carbon nanotube to the rare earth salt is 1: (0.12-0.14). According to the invention, the loss capability of the manganese zinc ferrite material to electromagnetic interference is enhanced, and the problem that the magnetic conductivity and impedance of the material are reduced in a high-frequency environment is solved.

The invention provides a manganese zinc ferrite material as well as a preparation method and application thereof. The preparation method comprises the following steps: sequentially carrying out first ball milling, pre-sintering, second ball milling, molten salt reaction and salt leaching treatment on raw materials of the manganese-zinc ferrite material to obtain the manganese-zinc ferrite material. The manganese zinc ferrite material prepared by the invention has the beneficial effects of high energy storage and low energy consumption.

The invention provides a low-temperature low-power-consumption manganese-zinc ferrite material and a preparation method thereof. The manganese-zinc ferrite material is prepared from main components, auxiliary components and a mineralizer, the main components comprise, by mole percentage, 53.5%-55.5% of Fe2O3, 8.5%-11.5% of ZnO and the balance Mn3O4, and the total percentage is 100%; the auxiliary component is composed of CaO, SiO2, Nb2O5, Co2O3, TiO2 and SnO2, and the mineralizing agent is composed of WO3 and Bi2O3. The low-temperature power consumption characteristic of the material is improved by reducing the magnetocrystalline anisotropy of the power manganese-zinc ferrite material. According to the present invention, the iron passing formula is adopted as the main formula, the doped oxide capable of improving magnetocrystalline anisotropy is matched so as to improve the low-temperature magnetocrystalline anisotropy constant of the power manganese zinc ferrite material, and the oxide capable of improving magnetocrystalline anisotropy and the oxide capable of improving resistivity are matched so as to achieve the low-temperature and low-power consumption effect;

The invention provides a zinc oxide-zinc ferrite hollow nanoflower composite material as well as a preparation method and application thereof, and belongs to the technical field of gas sensitive materials. The preparation method comprises the following steps: precipitating zinc acetate, polyvinylpyrrolidone and potassium ferricyanide at room temperature by adopting a chemical precipitation method to obtain solid Zn3 [Fe (CN) 6] 2 nanoparticles; the preparation method comprises the following steps: taking Zn3 [Fe (CN) 6] 2 nanoparticles as a template reactant, etching the Zn3 [Fe (CN) 6] 2 nanoparticles in water-N, N-dimethylformamide to obtain a ZnFe precursor, and carrying out high-temperature calcination treatment on the precursor to obtain the zinc oxide-zinc ferrite hollow nanoflower structure composite material. The ZnO / ZnFe2O4 composite material prepared by the method disclosed by the invention is good in morphology and relatively large in specific surface area, and is of a hollow nanoflower spinel structure. The structure has potential application value in the field of gas sensors, and a new thought is provided for expanding the application of the spinel type semiconductor oxide serving as a sensitive material to construct the gas sensors.

The invention discloses a method for degrading gold cyanidation tailings through photo-Fenton of an aluminum-based bimetallic catalyst, and belongs to the technical field of cyanidation tailings treatment. Iron salt and zinc salt are loaded on activated aluminum oxide through an impregnation method, the aluminum-based bimetallic catalyst is obtained through the treatment processes of roasting, grinding, drying and the like, and iron oxide and zinc ferrite contained in the synthesized aluminum-based bimetallic catalyst are main active substances for degrading cyanide residues through photo-Fenton catalysis; under the participation of hydrogen peroxide and an ultraviolet light source, the concentration of cyanide in the cyanide residues can be remarkably reduced, toxicity detection on the reacted filter residues shows that the concentration of the cyanide is lower than the national standard, and the cyanide residues can be treated as general solid waste; the cyanide removal rate can reach 95% or above, and the method has a very good application prospect.

The invention discloses a method for strengthening secondary zinc oxide smoke dust leaching through ultrasonic waves and ascorbic acid. The method comprises the steps that secondary zinc oxide smoke dust is dried and then mixed with a sulfuric acid solution; by controlling the liquid-solid ratio, separation of silica gel and other adsorptive coprecipitates can be effectively inhibited, and the leaching rate of zinc can be increased; ascorbic acid is added for reduction leaching; the ascorbic acid reduces Fe (III) of zinc ferrite in the secondary zinc oxide smoke dust into Fe (II), the structure of the zinc ferrite is destroyed, and zinc ions are released in the leaching process, so that the leaching rate of zinc is increased; carrying out ultrasonic-assisted intensified leaching for 10-30 minutes, and filtering to obtain a leaching solution and leaching residues; under the action of ultrasonic waves, liquid and solid-liquid interfaces are damaged, and tiny cavitation bubbles are generated; the shear stress generated when the cavitation bubbles are broken penetrates through ion lattices of a product layer to be penetrated through ultrasonic waves, local high temperature and high pressure are caused, finally the granularity of the secondary zinc oxide smoke dust is reduced, ascorbic acid and sulfuric acid can permeate into pores and cracks, and efficiency is improved.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a nickel-zinc ferrite material as well as a preparation method and application thereof. The invention provides a nickel-zinc ferrite material. The nickel-zinc ferrite material comprises the following raw materials: main components and auxiliary components, wherein the main components comprise Fe2O3, NiO, ZnO and CuO; the mass percentage of Fe2O3 in the main component is 64.05 to 68.72 wt%, the mass percentage of NiO in the main component is 14.12 to 17.36 wt%, the mass percentage of ZnO in the main component is 11.61 to 15.02 wt%, and the mass percentage of CuO in the main component is 3.82 to 4.45 wt%; based on the total weight of the main components, the auxiliary components comprise 0.2 wt%-0.6 wt% of Al2O3, 0.05 wt%-0.25 wt% of SiO2 and 0.1 wt%-0.35 wt% of MnO2. According to the nickel-zinc ferrite material, specific main components and auxiliary components are selected, and the contents of the main components and the auxiliary components are limited, so that all the components generate a synergistic effect, and finally the nickel-zinc ferrite material with excellent comprehensive performance is obtained.

The invention discloses a halogen-free low-smoke flame-retardant degaussing cable for ships, and the cable comprises a copper conductor, the outer layer of the copper conductor is sleeved with an insulating layer, and the outer layer of the insulating layer is sleeved with a degaussing flame-retardant composite layer. The degaussing flame-retardant composite layer is prepared from a degaussing flame-retardant composite material; the degaussing flame-retardant composite material comprises the following raw materials in parts by mass: 100 parts of an ethylene-vinyl acetate copolymer, 15-20 parts of nano nickel-zinc ferrite, 60-80 parts of a modified flame retardant, 10-15 parts of red phosphorus microcapsules and 3-5 parts of nano montmorillonite, and the halogen-free low-smoke flame-retardant degaussing cable for ships and warships provided by the invention is a halogen-free low-smoke flame-retardant degaussing cable for ships and warships. Through the multistage flame-retardant system design and the nano ferrite degaussing integration and interface synergistic strengthening process, synergistic optimization of halogen-free, low-smoke, high-flame-retardant and degaussing functions of the ship cable is realized, and compared with the traditional technology, the ship cable is remarkably improved.

The invention relates to the technical field of ferrite materials, in particular to a manganese zinc ferrite material as well as a preparation method and application thereof. The invention provides a manganese-zinc ferrite material. Raw materials of the manganese-zinc ferrite material comprise main components and auxiliary components, the main components comprise 52.0 mol% to 53.0 mol% of Fe2O3, 18.0 mol% to 19.0 mol% of ZnO and 28.0 mol% to 29.5 mol% of MnO; based on the total weight of the main component, the auxiliary component comprises 100 to 2000 ppm of Co2O3; and 100 to 2,000 ppm of Bi2O3 (bismuth oxide). And 100 to 2000 ppm of MoO3. In the invention, the main components are defined as Fe2O3, ZnO and MnO, the auxiliary components are Co2O3, Bi2O3 and MoO3, and the relative content of each component is defined, so that the finally prepared manganese-zinc ferrite material has relatively high magnetic conductivity.

A floating-type silver phosphate / zinc ferrite / floating bead composite photocatalyst, and a preparation method therefor and the use thereof, and a wastewater treatment method. The floating-type silver phosphate / zinc ferrite / floating bead composite photocatalyst comprises floating beads, a zinc ferrite thin film coating the floating beads, and silver phosphate deposited on the zinc ferrite thin film, wherein zinc ferrite in the zinc ferrite thin film and the silver phosphate form a heterojunction. In the catalyst, floating beads serve as a carrier, such that the catalyst can float on the surface of an aqueous solution during use, thereby facilitating recycling; in addition, silver phosphate is deposited after the surface of the carrier is coated with the zinc ferrite thin film, thereby improving the photocatalytic activity of the catalyst under visible light. The preparation method for the catalyst is simple to operate and easy to industrialize.

The invention relates to the technical field of magnetic materials, and provides a method for preparing a manganese zinc ferrite material from industrial manganese sulfate waste. The manganese-zinc ferrite material is prepared by mixing industrial manganese sulfate waste, ferric oxide and zinc oxide and then carrying out pre-sintering, ball milling, granulation, pressing and sintering. The manganese-zinc ferrite material is prepared from the industrial manganese sulfate waste instead of manganous-manganic oxide, so that the problem that the industrial manganese sulfate waste is difficult to treat is solved, waste is turned into wealth, green and energy-saving development is realized, meanwhile, the production cost of the power ferrite material can be reduced, and the market competitiveness is improved; and the manganese zinc ferrite material prepared by the invention has excellent performance and high qualified rate.

The invention relates to a manganese zinc ferrite composite material as well as an internal mixing method and application thereof. The manganese zinc ferrite composite material comprises manganese zinc ferrite powder and an additive, the additives comprise a framework material, a binder, a lubricant and an antioxidant; the average particle size D50 of the manganese zinc ferrite powder is 0.95 [mu] m to 1.75 [mu] m. According to the invention, the additive comprising the framework material, the binder, the lubricant and the antioxidant is mixed with the manganese-zinc ferrite powder with the average particle size D50 of 0.95-1.75 [mu] m, and the manganese-zinc ferrite powder with the particle size can be uniformly dispersed in the manganese-zinc ferrite composite material under the combined action of the framework material, the binder, the lubricant and the antioxidant; and therefore, the uniform consistency of internal mixing is guaranteed, the problem that internal mixing is difficult due to the fact that the manganese zinc ferrite powder is small in particle size is solved, the quality of soft magnetic material injection molding products is improved, large-scale production is promoted, and the requirement of the market for high-performance soft magnetic materials is met.

Described is an intrinsically multiplexed magnetostatic surface wave (MSSW) device comprising of a pair of transducers that couple to one or more plurality of ferrite films. In embodiments, the ferrite films may be provided as one or more of a YIG, Nickle Zinc Ferrite, Lithium Ferrite configured to simultaneously provide the MSSW device having an associated plurality of MSSW operational bandwidths. The concepts, structure and technique described herein may be used to provide broadband magnetostatic surface wave devices that employ intrinsic multiplexing techniques which enable customizable frequency responses over broad bandwidths.

The invention relates to the technical field of ferrite preparation, and particularly provides an iron-poor manganese-zinc ferrite material and a preparation method thereof.The iron-poor manganese-zinc ferrite material comprises main components and auxiliary components, and the main components comprise 65-67 wt% of Fe2O3, 10-12 wt% of ZnO and the balance Mn3O4 by taking the total weight of the main components as 100 wt%; the main components comprise Fe2O3, ZnO, Mn3O4, CaCO3 and Co2O3, the auxiliary components comprise, by weight, 100-2000 ppm of CaCO3 and 1000-10000 ppm of Co2O3, and by controlling the content of Fe2O3, ZnO, Mn3O4, CaCO3 and Co2O3 in the formula, the iron-poor manganese zinc ferrite material has the advantages of being low in temperature, high in magnetic conductivity, high in Curie temperature, high in frequency and high in impedance.

This invention discloses a high Curie temperature, high frequency, and high impedance manganese-zinc ferrite material and its preparation method, belonging to the technical field of soft magnetic ferrite materials. The manganese-zinc ferrite material consists of a main component and secondary components. The main component, calculated as oxides, comprises Fe2O3: 48.5–49.9 mol%, ZnO: 18.5–21.5 mol%, NiO: 0.5–2.0 mol%, with the remainder being MnO. The secondary components, by weight of the main component, include at least four of the following: Co2O3: 0.05–0.30 wt%, SiO2: 0.005–0.01 wt%, CaCO3: 0.02–0.05 wt%, ZrO2: 0.01–0.02 wt%, Bi2O3: 0.01–0.03 wt%, and V2O5: 0.01–0.05 wt%, mixed in any proportion. The resulting manganese-zinc ferrite material exhibits excellent properties such as high impedance.

A rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes a rhombohedral zinc orthosilicate (Zn2SiO4) phase, a cubic zinc ferrite (ZnFe2O4) phase, and a hexagonal silicon dioxide (SiO2) phase. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material exhibits a morphology including spherical microscale particles with an average diameter ranging from 0.8 micrometer (μm) to 1.8 μm and irregular nanoscale aggregates with an average diameter ranging from 50 nanometer (nm) to 110 nm. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material has an adsorption capacity for basic fuchsin dye of greater than or equal to 140 milligrams per gram (mg / g). Furthermore, a method for producing the rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes calcination of metal precursors.

The utility model discloses an optical module circuit board device with good anti-interference and heat-conducting properties, which comprises a circuit board body, an anti-interference cover is adhered to the top of the circuit board body, a heat-conducting wear-resistant cover is movably arranged at the position, close to the edge, of the top of the anti-interference cover, and supporting frames are movably and symmetrically arranged at the two ends of the bottom of the circuit board body. The anti-interference cover comprises an outer copper-clad plate layer, a nickel-zinc ferrite layer, a conductive rubber layer, a metal micro-powder wave-absorbing material layer and an inner copper-clad plate layer which are sequentially arranged from outside to inside, and the heat-conducting wear-resistant cover comprises a metal substrate, a ceramic substrate, a heat-conducting silica gel layer and a polymer insulating substrate which are sequentially arranged from outside to inside. According to the utility model, the anti-interference cover adhered to the top adopts a multi-layer structure, and the outer copper-clad plate layer, the nickel-zinc ferrite layer, the conductive rubber layer, the metal micro-powder wave-absorbing material layer and the inner copper-clad plate layer are sequentially arranged from outside to inside, so that external electromagnetic interference can be shielded and absorbed in all directions through the design.

The present invention relates to a process for recovering zinc and iron products from zinc-containing waste materials obtained from the zinc or steel industry, or both, by first treating the waste material(s) with strong acid, to convert any zinc ferrites into leachable compounds, and then leaching the acid-treated material, neutralizing the acid of the leach solution, recovering zinc from the neutralized ferrous iron-containing solution, recovering iron from the thus obtained solution, and circulating at least a fraction of the raffinate solution obtained from the iron recovery back to the leaching step.

A method for producing a soft magnetic manganese-zinc ferrite with a wide temperature range and high magnetic permeability for automotive electronics, characterized in that the material comprises main components and auxiliary components, wherein the main components comprise Fe₂O₃: 53 mol% to 55 mol%, ZnO: 16 mol% to 19 mol%, the remainder being Mn₃O₄, wherein, based on the total weight of the main components, the auxiliary components comprise nano-CaCO₃: 400 ppm to 1000 ppm, nano-TiO₂: 2000 to 6000 ppm, nano-Co₂O₃: 500 ppm to 2000 ppm, nano-Nb₂O₅: 100 ppm to 350 ppm, nano-SiO₂: 20 ppm to 150 ppm, nano-CuO: 0 ppm to 600 ppm, wherein the method for production comprises the following steps: Step 1, Preparation: the main components Fe2O3, ZnO and Mn3O4 are weighed according to their proportions and mixed by wet ball milling, with a mixing time of 10 to 40 minutes; Step 2, Pre-firing: the mixture obtained from step 1 is dried and pre-fired at 700 °C to 1000 °C, holding the temperature for 1 to 3 hours; Step 3, Grinding: the pre-burned material obtained from step 2 is shaken and the auxiliary components Nano-CaCO3, Nano-TiO2, Nano-Co2O3, Nano-Nb2O5, Nano-SiO2 and Nano-CuO are added according to the proportions, using the fluidized bed airflow milling method to grind the pre-burned material; Step 4, Granulation: the powder is granulated after airflow milling; Step 5, Pressing and Forming: it is pressed into a ring-shaped base body with the dimensions Ø 25mm in diameter * Ø 15mm in diameter * 7.5mm, with a density of 3.15g / cm³. 3 up to 3.35g / cm³ 3 amounts; Step 6, sintering, where the sintering temperature is 1200 to 1280°C, the holding time is 4 to 8 hours and the equilibrium oxygen content is 3.0 to 8.0%.

The invention discloses ultralow-loss manganese zinc ferrite and a preparation method thereof, and belongs to the technical field of ferrite soft magnetic materials. The ultralow-loss manganese zinc ferrite comprises the following raw materials: a main component, a first additive and a second additive, the main components comprise Fe2O3, ZnO and MnO; the first additive comprises one or more of SiO2 (silicon dioxide), TiO2 (titanium dioxide) and ZrO2 (zirconium dioxide); and the second additive is prepared from one or more of CaCO3, Co3O4, CuO and Al2O3. According to the invention, through step-by-step addition of the specific additives, comprehensive and effective reduction of the loss of the manganese-zinc ferrite core is finally realized, and the performance goal of ultra-low loss is achieved.

The present invention generally relates to a method for synthesizing dysprosium-doped copper-zinc ferrite nanomaterials with enhanced structural and functional properties. The method comprises dissolving stoichiometric quantities of copper nitrate trihydrate, zinc nitrate hexahydrate, iron nitrate nonahydrate, and dysprosium nitrate hexahydrate in distilled water to prepare an oxidizer solution. A fuel mixture is separately prepared using urea and glucose in equal proportions by weight. The oxidizer and fuel mixtures are combined in 1:1 ratio, calculated based on their respective oxidizing and reducing valencies, to form a homogeneous precursor solution. This solution is stirred thoroughly for about one hour and subsequently transferred to a Pyrex dish. The dish is placed in a muffle furnace preheated to approximately 450° C., where the solution undergoes a self-sustained combustion reaction, yielding a fine, porous Cu0.5Zn0.5DyxFe2-xO4 ferrite powder within 20 minutes. The resultant powder is ground to achieve uniform particle distribution suitable for advanced applications.

The utility model relates to grinding equipment for a manganese zinc ferrite material. The grinding device comprises a grinding platform, a grinding support, a three-axis moving platform and a clamping mechanism, the grinding support and the clamping mechanism are both installed on the grinding platform, the three-axis moving platform is installed on the grinding support, and the grinding device is structurally characterized by further comprising a swing mechanism, a buffering mechanism and a grinding mechanism. The swing mechanism is installed on the three-axis moving platform, the buffering mechanism is installed on the swing mechanism, the grinding mechanism is installed on the buffering mechanism, the swing mechanism comprises a swing straight arm, a swing arm, a gear, a rack and a swing air cylinder, one end of the swing straight arm is installed on the three-axis moving platform, and the other end of the swing arm is installed on the three-axis moving platform. The gear is rotationally installed at the other end of the swing straight arm, the gear is fixed to one end of the swing swing arm, the rack is installed on the swing straight arm in a sliding mode, the rack is meshed with the gear, and the rack is connected with the swing air cylinder.

Broadband high T c High-conductivity manganese-zinc ferrite and preparation method, belong to ferrite material preparation technical field. High specific surface area raw material is adopted, contact area of powder in ball milling process is increased, reaction activity is improved, and sintering temperature is reduced; MnZn ferrite main formula adopts iron-rich zinc-deficient system, superexchange interaction is enhanced, and material Curie temperature is realized; secondary ball milling introduces combined additives, sintering process grain growth mechanism is regulated by means of fluxing and crystal resistance dual effects, Co2O3 is used to compensate MnZn ferrite magnetic crystal anisotropy constant, and initial magnetic permeability is improved; CaSiO3 is introduced, and is enriched in grain boundary in the sintering process, grain boundary resistivity is improved, and magnetic permeability frequency characteristic is improved; in the sintering process, oxygen partial pressure is accurately controlled in the holding and cooling stages, Fe 2+ Ion generation amount is influenced, sample resistivity is improved, and suitable sintering temperature and holding time are beneficial to grain growth and material densification.

The utility model provides a three-dimensional coil and planar coil combined wireless charging system, which relates to the technical field of wireless charging and comprises a transmitting end and a receiving end. The transmitting end comprises a direct-current power supply, an inverter circuit, a transmitting end compensation circuit and a transmitting coil; the receiving end comprises a receiving coil, a receiving end compensation circuit and a rectification filter circuit. Wherein the transmitting coil comprises a manganese zinc ferrite magnetic core and a three-dimensional coil, and the three-dimensional coil is spirally and densely wound on the outer side of the manganese zinc ferrite magnetic core; the receiving coil comprises a planar coil and manganese zinc ferrite flat magnetic bars, the planar coil is wound into a circular ring shape, the manganese zinc ferrite flat magnetic bars are alternately arranged on the circular ring-shaped planar coil along the normal direction and the tangential direction, and the difference between two adjacent normal manganese zinc ferrite flat magnetic bars is 60 degrees; the difference between two adjacent tangential manganese zinc ferrite flat magnetic bars is 60 degrees, and the difference between the adjacent normal manganese zinc ferrite flat magnetic bar and tangential manganese zinc ferrite flat magnetic bar is 30 degrees.