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30 results about "Zinc ferrite" patented technology
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Zinc ferrites are a series of synthetic inorganic compounds of zinc and iron (ferrite) with the general formula of ZnₓFe₃₋ₓO₄. Zinc ferrite compounds can be prepared by aging solutions of Zn(NO₃)₂, Fe(NO₃)₃, and triethanolamine in the presence and in the absence of hydrazine, or reacting iron oxides and zinc oxide at high temperature. Spinel (Zn, Fe) Fe₂O₄ appears as a tan-colored solid that is insoluble in water, acids, or diluted alkali. Because of their high opacity, zinc ferrites can be used as pigments, especially in applications requiring heat stability. For example, zinc ferrite prepared from yellow iron oxide can be used as a substitute for applications in temperatures above 350 °F (177 °C). When added to high corrosion-resistant coatings, the corrosion protection increases with an increase in the concentration of zinc ferrite. A recent investigation shows that the zinc ferrite, which is paramagnetic in the bulk form, becomes ferrimagnetic in nanocrystalline thin film format. A large room temperature magnetization and narrow ferromagnetic resonance linewidth have been achieved by controlling thin films growth conditions.
A raw material cleaning device for producing high-grade zinc ferrite soft magnetic material
The utility model relates to the soft magnetic material production cleaning field especially relates to a raw material cleaning device for zinc ferrite high -grade soft magnetic material production. The utility model provides a raw material cleaning device for zinc ferrate high -grade soft magnetic material production, including support frame, outer layer cylinder, inner layer cylinder, motor, gear and gear ring etc. ; The outer layer cylinder is fixedly connected in the middle of support frame top, the inner layer cylinder is slidably connected in the outer layer cylinder, the motor is fixedly connected in the outer layer cylinder front side, the motor is located water pump right side, the gear is fixedly connected on motor output shaft, the outer layer cylinder outside edge is sleeved with gear ring, and the gear ring is mutually engaged with gear, the utility model drives the rotation of gear and gear ring through motor, makes the inner layer cylinder rotate in the outer layer cylinder, and this mechanized operation mode can more evenly, more completely wash zinc ferrate raw material, and compared with traditional cleaning mode not only has improved the efficiency, can guarantee the quality of cleaning.
Owner:JIUJIANG LINHUI ADVANCED MATERIALS CO LTD
Intelligent heat treatment forming die for manganese-zinc ferrite core
The utility model discloses a kind of manganese-zinc ferrite core intelligent heat treatment forming mould, it is related to magnetic core forming mould technical field, including bottom mould and temperature control unit;Bottom mould: top surface and the bottom surface of top mould correspond with and cooperate, the inside of bottom mould is equipped with stripping unit;Temperature control unit: including electromagnetic heater, fixed plate, electromagnetic heating ring, fixed groove and heating ring groove, the inside of bottom mould is opened in heating ring groove, the top surface of bottom mould is opened in fixed groove, heating ring groove is linked with fixed groove, the bottom surface of fixed plate is fixed with electromagnetic heating ring, electromagnetic heating ring is placed in the inside of heating ring groove, this manganese-zinc ferrite core intelligent heat treatment forming mould, accurate temperature control is realized by the intelligent linkage of electromagnetic heating ring and temperature sensor, ensure that manganese-zinc ferrite core is evenly heated, improve magnetic permeability and reduce loss, while electromagnetic heating technology is energy-saving and efficient, prolongs mould life.
Owner:SUZHOU TIANMING MAGNETIC IND CO LTD
A method for improving the leaching rate of zinc from zinc residue
The application discloses a method for improving zinc leaching rate in zinc residue, which is carried out according to the following steps: (1) mechanical activation pretreatment: zinc residue containing zinc ferrite and a reducing agent containing FeS2 are placed in sulfuric acid solution I for ball milling activation to obtain surface-activated ore slurry; (2) hot acid leaching: the obtained surface-activated ore slurry is transferred to sulfuric acid solution II for reaction leaching, and then the obtained reaction product is subjected to solid-liquid separation to obtain zinc leaching solution. The zinc residue is subjected to composite treatment through mechanical activation-pyrite reduction-hot acid leaching: on the one hand, the surface lattice of zinc ferrite is destroyed through mechanical chemical action to increase the reactive active site thereof; on the other hand, the reducing agent containing FeS2 releases reducing sulfur species H2S and S2 in an acid system to reduce Fe3+ in zinc ferrite to Fe2+. 2‑ Fe 3+ in zinc ferrite is reduced to Fe 2+ 2+. The application realizes selective extraction of zinc, effectively inhibits synchronous dissolution of iron, and makes the zinc leaching rate reach more than 96%.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Wide-temperature low-loss high-bs manganese-zinc ferrite material and manufacturing method thereof
PendingCN122079612Areduce lossBs highTransformers/inductances magnetic coresManganeseMagnetocrystalline anisotropy
This invention relates to the field of manganese-zinc ferrite materials technology, and discloses a wide-temperature, low-loss, high-Bs manganese-zinc ferrite material, comprising a main component and auxiliary components. The main component consists of Fe2O3, ZnO, and MnO, while the auxiliary components consist of Co2O3, Ca2CO3, Nb2O5, ZrO2, SiO2, NiO, SnO2, and TiO2. The total amount of auxiliary components relative to the main component is calculated as a weight percentage. This invention compensates for the magnetocrystalline anisotropy constant K1 of the ferrite matrix by adding multiple auxiliary components and optimizing the combination of their addition amounts. This reduces the magnetocrystalline anisotropy constant K1 over a wide temperature range, achieving characteristics such as wide-temperature, low-loss, and high Bs. By controlling the addition range of the main and auxiliary components, the process enables the manganese-zinc ferrite to possess both low-loss and high-Bs characteristics at different temperatures.
Owner:BAOSTEEL MAGNETICS (JIANGSU CO LTD
Ceramic wave-absorbing metamaterial and preparation method thereof
The application relates to a ceramic wave-absorbing metamaterial and a preparation method thereof, which comprises at least three layers of ceramic base loss unit layers, ceramic base impedance regulation unit layers and metal mesh layers which are alternately stacked; the ceramic base loss unit layer comprises a ceramic matrix A and wave-absorbing agent A dispersed in the ceramic matrix A, wherein the wave-absorbing agent A is composed of a composite powder of nano silicon carbide with a particle size of 50-200 nm and a nickel-zinc ferrite ceramic powder; the ceramic base impedance regulation unit layer comprises a ceramic matrix B and wave-absorbing agent B dispersed in the ceramic matrix B, wherein the wave-absorbing agent B is composed of a composite powder of barium titanate with a particle size of 100-500 nm and tin oxide. The ceramic wave-absorbing metamaterial has a reflection loss of less than or equal to -10 dB in a 1-8 GHz frequency band, and a reflection loss of less than or equal to -25 dB in an 8-18 GHz frequency band.
Owner:ZHONGSHAN YUANSHENG ELECTRONIC SCI & TECH CO LTD
X-band high-power lithium-zinc ferrite material and preparation method thereof
This invention discloses an X-band high-power lithium-zinc ferrite material and its preparation method, belonging to the technical field of high-power lithium-zinc ferrite material preparation, including a main material and additives, wherein the main material is Li. (0.605‑0.5x) Zn 0.05 Co x Ti 0.26 Mn 0.06 Fe (2.025‑0.5x) O 4‑δ The additives, based on the mass of the main material, include: 0.05–0.4 wt% Sb₂O₃, 0.4–1.2 wt% Bi₂O₃, and 0.01–0.02 wt% Dy₂O₃. A two-step sintering method is used: first, sintering at 910–930℃ for 1–2 h, then sintering at 950–1050℃ for 2–5 h, yielding an X-band high-power lithium-zinc ferrite material with high spin linewidth, high remanence ratio, and low ferromagnetic resonance linewidth.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Manganese-zinc ferrite / graphene composite aerogel material and preparation method thereof
The application discloses a manganese-zinc ferrite / graphene composite aerogel material and a preparation method thereof. The raw materials of the material comprise manganese-zinc ferrite and graphene oxide; the mass ratio of the manganese-zinc ferrite to the graphene oxide is 0.06-0.18:1; and the manganese-zinc ferrite and the graphene oxide are combined into the composite aerogel material through a hydrothermal reaction and freeze drying. The technical scheme has the advantages of improving impedance matching of graphene aerogel, widening an effective absorption bandwidth and obtaining light weight and high efficiency.
Owner:NINGBO GRAPHENE INNOVATION CENT CO LTD
Manganese-zinc ferrite / nano-graphene composite wave-absorbing material and preparation method thereof
PendingCN122403964APyrolusiteFerrite powder
Owner:湖南工商大学
An electromagnetic radiation resistant semiconductor device and an electromagnetic radiation resistant method
The application provides a semiconductor device and a method for resisting electromagnetic radiation, the semiconductor device comprising a semiconductor substrate, a semiconductor layer, an insulating medium layer, a germanium-antimony-tellurium thin film layer, a first electrode and a second electrode. The method comprises: electromagnetic radiation waves reaching a super surface structure of the germanium-antimony-tellurium thin film layer; realizing reflection of the semiconductor device against electromagnetic radiation by the super surface structure of the germanium-antimony-tellurium thin film layer composed of grooves, cylinders and an electromagnetic radiation reflection matrix; the transverse holes and the longitudinal holes being filled with manganese-zinc ferrite material, when the first electromagnetic radiation waves reflected by the electromagnetic radiation reflection matrix reach the surface of the manganese-zinc ferrite material, second electromagnetic radiation waves are formed, the second electromagnetic radiation waves and the first electromagnetic radiation waves are opposite to each other, so as to offset the first electromagnetic radiation waves and the second electromagnetic radiation waves. The application improves the reflectivity of electromagnetic radiation, helps to reduce the energy of electromagnetic radiation, and reduces the influence of electromagnetic radiation on the performance of the Schottky diode.
Owner:GENE POWERS INC +1
Preparation method of high-performance manganese-zinc ferrite powder
This invention relates to a method for preparing high-performance manganese-zinc ferrite powder, comprising: (1) mixing the main raw material, defoamer, deionized water and auxiliary raw material evenly, and then ball milling once to obtain a slurry; wherein the main raw material includes pre-calcined manganese-zinc ferrite powder; (2) adding a binder and a dispersant to the slurry, and ball milling a second time to obtain a uniform slurry; (3) conveying the uniform slurry to a spray drying tower for spray granulation to obtain the high-performance manganese-zinc ferrite powder. The high-performance manganese-zinc ferrite powder obtained by this invention has the advantages of uniform particle size, high sphericity, high fluidity and high compaction density, and the process has high consistency and stability and good reproducibility between different batches.
Owner:KONFOONG MATERIALS INTERNATIONAL CO LTD
Wide-temperature low-loss manganese-zinc ferrite material, preparation method and application thereof
The application relates to the technical field of manganese-zinc ferrite material, and provides a wide-temperature low-loss manganese-zinc ferrite material and a preparation method and application thereof.The main components of the manganese-zinc ferrite material are Fe2O3, ZnO and MnO, and the auxiliary components include Fe3O4@SiO2 magnetic nanoparticles, CaO, Co2O3, ZrO2, TiO2 and V2O5.The preparation method adopts a horizontal sand mill for sand grinding mixing, Fe3O4@SiO2 magnetic nanoparticles are prepared through hydrolysis of tetraethyl orthosilicate, and a heat preservation treatment process is reasonably set according to the Curie temperature of the material in the sintering cooling stage, so that the uniform growth of the crystal grains is effectively promoted, the grain boundary resistivity is improved, and the internal stress of the material is reduced, thereby realizing the reduction of the loss, and the prepared wide-temperature low-loss manganese-zinc ferrite material can be applied to a scene with a working frequency of 200-500 kHz.
Owner:TDG HLDG CO LTD
Method for improving the soluble zinc rate of zinc calcine
The application discloses a method for improving the soluble zinc rate of zinc calcine, and belongs to the technical field of zinc metallurgy. The method for improving the soluble zinc rate of zinc calcine comprises the following steps: mixing high-temperature zinc calcine and an activating agent to obtain primary treated sand; and performing reduction treatment on the primary treated sand by using a reducing gas in an inert gas atmosphere to obtain modified zinc calcine; and the activating agent is a mixture of a sulfate and an alkaline oxide. Through the selection of the activating agent, the structure of the insoluble compounds such as zinc ferrite and zinc silicate in the zinc calcine can be broken, and the bound zinc element can be released, so that the soluble zinc rate of the zinc calcine can be greatly improved.
Owner:湖南株冶有色金属有限公司
A modified manganese tetroxide and its application in soft magnets
This invention relates to the field of ferrite magnetic materials technology, specifically to a modified manganese tetroxide and its application in soft magnets. The invention provides a modified manganese tetroxide and its application in soft magnets, which utilizes electrospinning technology with polyvinylpyrrolidone as a fiber template to form a composite nanofiber material with zinc ferrite as the inner layer and manganese tetroxide and cobalt tetraoxide ferrite as the outer layer, i.e., a modified manganese tetroxide fiber material. Using this as the fiber skeleton, modified polysiloxane and silicone resin are used as encapsulating materials to construct a three-dimensional anisotropic soft magnetic composite material. This solves the contradictory problems of high eddy current loss and difficulty in simultaneously achieving saturation magnetic induction intensity and high-frequency permeability in traditional soft magnetic materials at high frequencies.
Owner:HUNAN SHUANGFU NEW MATERIAL TECH CO LTD
A high-performance lean iron manganese zinc ferrite material made of ground clay and a preparation method and application thereof
This invention discloses a high-performance lean-iron manganese-zinc ferrite material prepared by grinding, its preparation method, and its application, belonging to the technical field of manganese-zinc ferrite material preparation. The preparation steps of the high-performance lean-iron manganese-zinc ferrite material prepared by grinding include: adjusting the molar ratio of Fe2O3, Mn3O4, and ZnO in the dried and pulverized grinding mud with one or two of Fe2O3, Mn3O4, and ZnO to obtain a mixed powder; adding the auxiliary component Co2O3 to the mixed powder, adding water, and ball milling to obtain a slurry; adding a binder to the slurry, stirring evenly, and drying to prepare a pre-pressed powder; pressing the pre-pressed powder into shape and sintering to obtain the high-performance lean-iron manganese-zinc ferrite material prepared by grinding. The high-performance lean-iron manganese-zinc ferrite material prepared by this invention has the characteristics of high frequency, high permeability, and high impedance, which can meet the material performance requirements of medium- and high-frequency anti-electromagnetic interference devices and solve the problem of grinding mud treatment, realizing the resource utilization of waste.
Owner:广东尚朋电磁科技有限公司 +1
High power density low loss manganese-zinc ferrite material, preparation method and application thereof
ActiveCN121850634BInorganic material magnetismInductances/transformers/magnets manufactureConvertersSoft magnet
The application belongs to the technical field of magnetic materials, and provides a high-power-density low-loss manganese-zinc ferrite material and a preparation method and application thereof.The manganese-zinc ferrite material comprises main components and auxiliary components, the main components are Fe2O3, ZnO and Mn3O4, and the auxiliary components are CaCO3, SiO2, Co2O3, V2O5, MoO3 and Nb2O5; the preparation method is to optimize the sand milling process, design different diameter steel ball ratios to reduce the difference between the powder particle size D90 and D50, and then reduce the difference in activation energy required for grain growth, so as to realize the uniform growth of grains; at the same time, by appropriately reducing the powder particle size to increase the specific surface area and activity, combined with the ultra-low temperature liquid phase sintering technology, fine and uniform grains are obtained, the material loss is effectively improved, and the manganese-zinc soft magnetic ferrite material with high temperature low loss characteristics at 1MHz, 130mT is successfully prepared, which can be applied to high-power-density power converters.
Owner:TDG HLDG CO LTD
A green and efficient photocatalytic removal method of cyanide
This invention relates to the field of cyanide removal technology, and discloses a green and efficient photocatalytic removal method for cyanide. The chemical formula of the high-entropy zinc ferrite described in this invention is (Co... 0.2 Ni 0.2 Zn 0.2 Mg 0.2 Cu 0.2 The high-entropy zinc ferrite supported on zinc foam described in this invention can photocatalytically degrade cyanide in water. The preparation method of the high-entropy zinc ferrite supported on zinc foam is as follows: High-entropy zinc ferrite (Co) is prepared by... 0.2 Ni 0.2 Zn 0.2 Mg 0.2 Cu 0.2 Fe2O4 and polyvinylidene fluoride are mixed evenly, and then N-methylpyrrolidone is added to form a glue solution. The glue solution is then loaded onto zinc foam to obtain zinc foam-loaded high-entropy zinc ferrite (Co). 0.2 Ni 0.2 Zn 0.2 Mg 0.2 Cu 0.2 Fe2O4. This invention is the first to discover that high-entropy zinc ferrite supported on zinc foam can photocatalytically degrade cyanide in water, and the degradation efficiency is very high, completely degrading cyanide in 3 hours. Furthermore, the high-entropy zinc ferrite supported on zinc foam can be reused 30 times.
Owner:HONGHE UNIVERSITY
Efficient turning-grinding combined machining device and machining method for complex component of hard and brittle material
This invention belongs to the field of precision manufacturing CNC machining technology, and relates to a high-efficiency turning and grinding composite machining device and method for complex components made of hard and brittle materials. The machining device includes a dial, a clamping sleeve, a stator core mandrel fixture, a positioning fixture, and a clamping positioning block. The method involves mounting the stator core onto the stator core mandrel fixture, quickly aligning it using the positioning fixture, and then clamping it on a CNC lathe in a single setup to grind the four-pole radial end face, the chamfer at the junction of the four-pole radial end face and the outer circle, and the four-pole radial outer circle. This invention solves the problems of low efficiency, easy edge chipping, and the need for multiple clamping and alignment in traditional sequential machining, achieving high-efficiency, high-precision, and automated machining of complex components made of hard and brittle materials. It is particularly suitable for the mass production of parts such as manganese-zinc ferrite stator cores.
Owner:CHINA STATE SHIPBUILDING CORP NO 707 RES INST
A high-b-s manganese-zinc ferrite material resistant to large current and high temperature and a preparation method and application thereof
This invention discloses a high-current, high-temperature, high-Bs manganese-zinc ferrite material, its preparation method, and its application, belonging to the field of manganese-zinc ferrite material preparation technology. The preparation steps of the high-current, high-temperature, high-Bs manganese-zinc ferrite material include: weighing Fe2O3, Mn3O4, and ZnO, mixing and ball milling with water to obtain slurry 1; pre-sintering slurry 1 to obtain ferrite powder; adding auxiliary components CaCO3, Nb2O5, V2O5, NiO, MoO3, and SiO2 to the ferrite powder, mixing and ball milling with water to obtain slurry 2; adding a binder to slurry 2, stirring evenly, and drying to prepare pre-pressed powder; pressing the pre-pressed powder into shape and sintering to obtain the high-current, high-temperature, high-Bs manganese-zinc ferrite material. The high-current, high-temperature, high-Bs manganese-zinc ferrite material prepared by this invention exhibits Bs≥540mT at 100℃, Bs≥510mT at 120℃, and Bs≥480mT at 140℃ under conditions of 1kHz and 1200A / m.
Owner:广东尚朋电磁科技有限公司 +1
A flaky nickel-zinc ferrite / polyaniline composite wave-absorbing material, a preparation method and application thereof
ActiveCN118834386BOther chemical processesMagnetic/electric field screeningNickel-zinc ferritePolyaniline composite
The application discloses a flaky nickel-zinc ferrite / polyaniline composite wave-absorbing material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving metal salt in deionized water, stirring to obtain solution A; dissolving sodium carbonate and sodium hydroxide in water, stirring to obtain solution B; adding solution B into solution A drop by drop, adjusting pH, standing for crystallization, centrifuging, washing and drying the product to obtain a precursor; high-temperature calcining the precursor in a muffle furnace, adding the obtained flaky nickel-zinc ferrite into a mixed solution of hydrochloric acid and ethanol, adjusting pH, and drying to obtain a hydroxylated ferrite; ultrasonic dispersing the hydroxylated ferrite in an ammonium persulfate hydrochloric acid solution to obtain a dispersion liquid, adding the dispersion liquid into an aniline dichloromethane solution drop by drop, standing for reaction at constant temperature for a period of time, and centrifuging, washing and drying to obtain the flaky nickel-zinc ferrite / polyaniline composite wave-absorbing material. The preparation method is mild, and the prepared wave-absorbing material has good wave-absorbing performance.
Owner:ANHUI UNIV
Low-loss high-stability manganese-zinc ferrite and preparation method thereof
Owner:HAINAN HONGYUANTAI ELECTRONIC TECHNOLOGY CO LTD
A method and device for graded reduction of steel smelting zinc-containing dust
This invention discloses a method and equipment for graded reduction of zinc-containing dust from iron and steel smelting, belonging to the field of zinc extraction technology from metallurgical waste. The zinc-containing dust is mixed with a carbon reducing agent to form pellets, which are then fed into a multi-stage reduction furnace. The pellets undergo graded gradient carbothermic reduction through three reduction stages, utilizing the difference in carbothermic reduction temperature between zinc oxide and zinc ferrite to achieve selective reduction and extraction. The composition of the flue gas is monitored in real time at the flue gas outlet of each stage, and the zinc reduction progress index is calculated. A proportional-integral control algorithm is used to dynamically adjust the temperature of each stage, achieving adaptive closed-loop control. The zinc-containing flue gas from each stage is introduced into independent condensation and collection channels for separate collection, obtaining secondary zinc oxide products of different grades. The supporting equipment includes a feeding and pelletizing unit, a multi-stage reduction furnace, a graded flue gas condensation and collection unit, and an online monitoring and intelligent control unit. This invention improves the stability of zinc recovery rate, enhances product grade, and reduces energy consumption.
Owner:FUXIN JIANXING METAL CO LTD
Low-loss wide-temperature manganese-zinc ferrite material and preparation process thereof
PendingCN122102671AInorganic material magnetismInductances/transformers/magnets manufactureNew energyActive agent
The application discloses a kind of low-loss wide-temperature manganese-zinc ferrite materials and preparation process thereof, belong to magnetic material technical field.Prepared by the following raw materials: Fe2O3 45-55 parts, Mn3O4 20-30 parts, ZnO 15-25 parts, Mg-V-Si in-situ reaction type composite dopant 2-4 parts, CaCO3 0.5-1.5 parts, Nb2O 5 0.1-0.3 parts, surfactant 0.2-0.8 parts, forming aid 1-2 parts.By preparing Mg-V-Si composite dopant, combined with three-step gradient temperature + double-platform gradient cooling sintering process, the material obtained in-40 DEG C to 180 DEG C wide temperature range power loss ≤308 kW / m³, initial permeability ≥3720, saturation magnetic induction intensity ≥542 mT, Curie temperature ≥258 DEG C, can meet the stringent demand of new energy vehicles, aerospace and other fields to wide-temperature low-loss magnetic material.
Owner:深圳信义磁性材料有限公司
A broadband high-impedance high-curie-temperature manganese-zinc ferrite material, a preparation method and application thereof
The application provides a wideband high-impedance high-Curie-temperature manganese-zinc ferrite material which is prepared from main components, auxiliary components and additives; the main components are composed of Fe2O3 51.8-52.5 mol%, ZnO 19.4-20.2 mol% and the rest is Mn3O4 in terms of mole percentage; the auxiliary components include CaCO3 400-600 ppm, SiO2 100-200 ppm, V2O5 500-700 ppm, SnO2 300-400 ppm and WO3 100-200 ppm in terms of the total mass of the main components; and the additives include LiCl 100-200 ppm in terms of the total mass of the main components. The formula of the manganese-zinc ferrite and the preparation process thereof are reasonably limited, and finally the manganese-zinc ferrite material with excellent comprehensive performance is prepared.
Owner:HENGDIAN GRP DMEGC MAGNETICS CO LTD +1
Ka-band low linewidth gyromagnetic lithium-zinc ferrite and preparation method thereof
The application discloses a Ka-band low-line-width gyromagnetic lithium-zinc ferrite and a preparation method thereof, and belongs to the technical field of microwave ferrite material preparation. 0.347 Zn 0.3 Ni 0.006 Mn 0.06 In x Fe 2.295‑x O4, x=0.005-0.03; based on the mass of the main material, the additives include: 0.8-1 wt% Bi2O3 and 0.1-0.3 wt% Sb2O3. The Ka-band low-line-width gyromagnetic lithium-zinc ferrite is prepared by using a two-step sintering method, that is, first sintering at 780-820 DEG C for 1-3 h, then passing oxygen, and then sintering at 1000-1050 DEG C for 2-4 h, so that the Ka-band low-line-width gyromagnetic lithium-zinc ferrite has low ferromagnetic resonance line width while keeping high saturation magnetization, high remanence ratio and low coercivity.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A zinc ferrite nanosheet carbon monoxide sensor material, a preparation method and application thereof
The application relates to the technical field of gas sensors, in particular to a zinc ferrite nanosheet carbon monoxide sensor material and a preparation method and application thereof. The zinc ferrite nanosheet carbon monoxide sensor material is low in cost compared with a noble metal doped ZnO type carbon monoxide sensor, has a simple preparation process, high repeatability, extremely high detection sensitivity for carbon monoxide, and can greatly improve the working temperature of a traditional zinc gas sensor, and the zinc ferrite nanosheet carbon monoxide sensor material can have a good response to carbon monoxide at 120 DEG C.
Owner:CHONGQING INNOVATION CENTER OF BEIJING INSTITUTE OF TECHNOLOGY
Iron-deficient soft magnetic mn-zn ferrite material and its preparation method and application
This invention discloses an iron-deficient soft magnetic manganese-zinc ferrite material, its preparation method, and its applications. The iron-deficient soft magnetic manganese-zinc ferrite material of this invention comprises a main component and secondary components. The main component, by molar percentage, includes the following components: Fe₂O₃ at 43.5–48.5 mol%, MnO at 30–35 mol%, with the balance being ZnO. The secondary components include CaCO₃, CuO, ZrO₂, Bi₂O₃, and MoO₃. In this iron-deficient soft magnetic manganese-zinc ferrite material, a low molar percentage (<50%) of Fe₂O₃ is combined with MnO and ZnO as the main component to increase the cutoff frequency of the manganese-zinc ferrite material's permeability, thereby improving its permeability attenuation in the high-frequency range. Simultaneously, the combination of CaCO₃, CuO, ZrO₂, Bi₂O₃, and MoO₃ promotes grain growth, thereby increasing the permeability of the manganese-zinc ferrite material while ensuring it possesses high saturation magnetic induction and a high Curie temperature.
Owner:RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
A manganese-zinc ferrite core heat soaking sintering device
A homogenizing sintering device for manganese-zinc ferrite cores includes a sintering furnace and a fixed box installed below the sintering furnace. A rotating component is installed inside the sintering furnace, and a driving assembly is installed inside the fixed box to drive the rotating component to rotate. Several fixed sleeves are fixed to the rotating component. The device is characterized in that a placement assembly is detachably connected to each fixed sleeve, and the placement assembly is in line contact with the magnetic core. This invention provides a homogenizing sintering device for manganese-zinc ferrite cores. Multiple limiting rods of the placement assembly clamp or support the magnetic core, providing linear or point contact, avoiding or reducing surface contact. This line or point contact method ensures more uniform heating and more complete sintering of the magnetic core during the sintering process, thereby improving product quality. It is suitable for fixing various types of magnetic cores, including cylindrical cores, cores with alternating cross-sections, and E-type cores.
Owner:GUIZHOU JINGCI ELECTRONIC TECH CO LTD
A low-profile dynamic multi-load constant-voltage output wireless power transmission system
This invention discloses a low-profile dynamic multi-load constant voltage output wireless power transmission system, belonging to the field of power transmission technology. It includes a transmitter, multiple coplanar repeater coils, multiple receivers, and a tuning capacitor. The transmitter is driven by a half-bridge or full-bridge inverter circuit with a working frequency of 100kHz, used to output high-frequency inverter voltage. The half-bridge inverter circuit outputs a square wave voltage with an amplitude of [missing value]. By setting double-layer PC40 manganese-zinc ferrite boards on the upper and lower sides of the connection between adjacent coplanar repeater coils, the main coupling coefficient between adjacent coils is increased from 0.09 without ferrite to ≥0.2, and the system transmission efficiency is increased to ≥85%. Simultaneously, the transmitter, repeater coils, and receivers all adopt a planar coil structure with an overall height ≤20mm, allowing for embedding in thin carriers such as desktops, floors, and electric vehicle charging stations. This perfectly adapts to scenarios requiring a low profile, such as smart homes, offices, and electric vehicle charging, resolving the contradiction between low coupling efficiency and large profile size in traditional systems.
Owner:XINYU UNIV