14 results about "Ferrocobalt" patented technology

In embodiments herein, a surface finish (SF) is formed on conductive contacts of a package substrate for connection to an embedded interconnect bridge circuit module die. In some embodiments, the SF may be electroless nickel plating and electroless palladium immersion gold (ENEPIG). In other embodiments, SF may be gold leaching electroless palladium leaching (IGEPIG). In other embodiments, the SF may include an electrolytic palladium gold layer on the indium layer or on the ferrocobalt layer.

A new MRAM memory cell and a manufacturing method therefor, which relate to the field of data storage. The method includes: sequentially including a reference layer, a magnesium oxide tunnel layer and a free layer in a stacking direction. The free layer sequentially includes an interfacial PMA free layer, a free spacer layer and a bulk PMA free layer in a stacking direction, wherein the interfacial PMA free layer is disposed on the surface of the magnesium oxide tunnel layer; the free spacer layer is configured to ferromagnetically couple the interfacial PMA free layer and the bulk PMA free layer; and the interfacial PMA free layer is at least one of a cobalt-containing alloy layer, an iron-containing alloy layer and a cobalt-iron alloy layer, and the bulk PMA free layer is a manganese-based ternary tetragonal alloy layer. In the present invention, an interfacial PMA free layer and a bulk PMA free layer are combined to provide a higher TMR. In addition, a new manganese-based ternary tetragonal alloy is also used as the bulk PMA free layer, which improves the process compatibility and also improves the data retention capability of a device.

The invention discloses a preparation method of a spinel / diatomite nano composite material with high oxygen vacancy. The preparation method comprises the following steps: S1, obtaining purified diatomite; s2, dispersing Fe (NO3) 3.9 H2O, Co (NO3) 2.6 H2O and the purified diatomite in an HNO3 solution, then dropwise adding a NaOH solution, and stirring to obtain a precursor; s3, performing hydrothermal synthesis reaction on the precursor under microwave radiation to obtain a reaction product; and S4, carrying out centrifugal washing, vacuum drying and grinding on the reaction product to obtain the high-oxygen-vacancy ferrocobalt spinel / diatomite nano composite material. The nano composite material has higher oxygen vacancy content and higher specific surface area, is applied to persulfate oxidation treatment of sewage as a catalyst, and synchronously excites the dielectric-magnetic loss synergistic effect and catalytic active sites of the material under the dual synergistic effect of the catalyst and microwaves, so that the photocatalytic activity of the material is improved. Efficient activation of persulfate and continuous generation of free radicals are achieved, and then deep purification of sewage containing diuron and other refractory organic pollutants is achieved.

The invention belongs to the technical field of environmental functional materials, and discloses a preparation method and application of an oxygen-vacancy-enriched ferrocobalt spinel and carbon core-shell microreactor. According to the method, a cobalt-iron spinel and carbon core-shell catalyst with rich oxygen vacancies is constructed through a defect engineering and morphology engineering synergistic strategy, and peroxymonosulfate (PMS) is efficiently activated to degrade antibiotics in water. The method specifically comprises the following steps: synthesizing a ferrocobalt spinel-carbon core-shell structure by adopting hydrothermal, metal ion adsorption and pyrolysis processes, and introducing oxygen vacancies through KBH4 reduction to optimize electron transfer and catalytic activity of the ferrocobalt spinel-carbon core-shell structure. The carbon nucleus in the obtained catalyst effectively enriches pollutants and PMS, and the confinement effect shortens the migration path of active oxygen species; and the PMS activation efficiency is obviously improved by the introduced oxygen vacancies. The catalyst is efficient when used for degrading antibiotics such as ciprofloxacin, has the advantages of high reaction rate constant, high removal rate, wide pH adaptability, strong anti-interference capability, low metal leaching and the like, and has a wide application prospect in the field of environmental governance.

The present invention relates to a magnet assembly and a camera actuator including same and, more specifically, to a magnet assembly and a camera actuator including same, the magnet assembly having a yoke which contacts the lower surface and left side of a magnet unit and is made of a Co-Fe alloy. To solve the technical problem, the magnet unit includes a plurality of magnets which may be arranged in a Halbach array.

The application relates to the field of data storage, in particular to a novel MRAM storage unit and a manufacturing method thereof, which comprises a reference layer, a magnesium-containing oxide tunnel layer and a free layer in sequence in a stacking direction; the free layer comprises an interface PMA free layer, a free spacer layer and a bulk PMA free layer in sequence in the stacking direction; the interface PMA free layer is arranged on the surface of the magnesium-containing oxide tunnel layer; the free spacer layer is used for ferromagnetic coupling of the interface PMA free layer and the bulk PMA free layer; the interface PMA free layer is at least one of a cobalt-containing alloy layer, an iron-containing alloy layer and a cobalt-iron-containing alloy layer; and the bulk PMA free layer is a ternary tetragonal alloy layer of manganese. The application combines the interface PMA free layer and the bulk PMA free layer, provides higher TMR, and further adopts a novel ternary tetragonal alloy of manganese as the bulk PMA free layer, improves process compatibility and improves the data retention capability of the device.

The invention discloses a ferrocobalt bimetallic oxide catalyst as well as a preparation method and application thereof, and belongs to the technical field of electro-catalytic materials. The method comprises the following steps: dissolving a metal salt containing a cobalt source and an iron source in water to obtain a cobalt-iron bimetal salt solution; uniformly mixing the FeCo metal salt precursor with a carbon suspension, and evaporating a solvent to obtain a FeCo metal salt precursor loaded on the carbon source; and under the protection of nitrogen, applying constant current to the precursor, introducing H2O / N2 mixed gas with the volume fraction of 1-5%, and carrying out heat treatment to obtain a CoFe2O4 / C nano composite material prepared through hydrothermal-electrostatic field synergy, namely the ferrocobalt bimetallic oxide catalyst. The CoFe2O4 / C nano composite material with low crystallinity, small particle size, high electrochemical active area, rich surface oxygen species, high-proportion high-valence active sites and rapid charge transfer capability is prepared, so that the catalytic activity and stability of oxygen evolution reaction are remarkably improved.

The invention discloses a preparation method for in-situ growth of ferrocobalt-layered double hydroxides (LDH), CoFe-LDH and a nanosheet catalyst through an electro-deposition method and application of the ferrocobalt-layered double hydroxides, the CoFe-LDH and the nanosheet catalyst. The LDH is a two-dimensional layered anion intercalation clay mineral, is rich in hydroxyl, has an adjustable surface electron structure, alkalinity and coordinated unsaturated active sites, is a good candidate for nitrogen reduction and CO2 conversion catalysts, and has a huge application prospect in many catalysts. On the basis, the CoFe-LDH nanosheet is loaded on a required substrate through a simple electro-deposition method and is directly used as a cathode for synthesizing urea through electro-catalytic reduction of NO2 <-> and CO2, and a good effect is achieved.

The present application relates to a kind of biochar load cobalt iron alloy composite catalyst and its preparation method and application, with agricultural and forestry waste wheat straw and cobalt iron prussian blue derivative (CoFe-PBA) as precursor, by coprecipitation method and high-temperature calcination method, biochar load cobalt iron alloy (CoFe@BC) Composite catalyst is successfully prepared.Catalytic performance is explored by using tetracycline (TC) as target pollutant, with the catalyst activated persulfate (PMS) degradation TC.The catalyst can effectively and quickly activate PMS, and the degradation rate of TC is as high as 99.96%.After repeated use for 5 times, the degradation rate still remains above 70%.The present application provides a simple, low-cost strategy for preparing efficient PMS activator for antibiotic wastewater remediation.

The present application relates to a kind of battery grade phosphorus iron preparation method of cobalt iron alloy acid leaching solution high pressure hydrolysis product as raw material, comprising the following steps: (1) cobalt iron alloy acid leaching solution high pressure hydrolysis product powder is added in deionized water, mixed and stirred again join phosphoric acid solution, after stirring evenly, obtain yellow mixed solution, heating reaction, filtration, obtain clear solution, control solution pH value is 1.10-1.20;(2) the clear solution obtained in stirring case, join the reducing iron powder, again join H2O2, continue stirring, again filter;(3) the solution obtained after filtering in step (2) is adjusted to the pH value between 2.85-3.50, obtain white precipitate and filter, wash, dry, i.e. battery grade phosphorus iron FePO4 Product.Compared with prior art, the method has the advantages of simple process route, low preparation cost and easy to enlarge, etc.

The invention belongs to the technical field of electrocatalytic materials and clean energy, and discloses a sulfur-hydrophobic self-cleaning porous nanosheet array electrocatalyst as well as a preparation method and application thereof. The method comprises the following steps: (1) substrate pretreatment: carrying out ultrasonic cleaning on ferrocobalt foam by using acetone, ethanol and deionized water in sequence, blow-drying, and carrying out double-sided etching treatment by using a DBD plasma technology to obtain a PCFF; (2) electro-deposition of a copper layer: performing constant-potential electro-deposition of copper on the surface of the PCFF to obtain a CuCoFe / PCFF alloy precursor; and (3) hydrothermal vulcanization: performing vulcanization treatment on the CuCoFe / PCFF alloy precursor in a hydrothermal environment containing a sulfur source to obtain the CuCoFeS / PCFF electrode. The problems that an SOR electrode is prone to being passivated by sulfur and short in service life are solved, the low-cost and high-activity non-noble metal electrode preparation method is provided, and an electrode structure which can still keep stability under high current density is achieved.

The invention discloses an electro-catalysis cathode material suitable for nitrogen heterocyclic pesticide wastewater treatment and a preparation method and application of the electro-catalysis cathode material, a FeCo-C electro-catalysis material is composed of a cobalt-iron alloy and a one-dimensional carbon fiber substrate, and the FeCo-C electro-catalysis cathode material is prepared through the specific preparation method. Raw materials and solvents required for preparation are few in types, the process is simple, and controllability is high. And in the FeCo-C electro-catalytic cathode material, metal iron and cobalt mainly exist in the form of alloy and non-metal oxide. The FeCo-C electrocatalytic cathode material prepared by the method has excellent catalytic performance stability and reusability, is high in water matrix interference resistance and wide in applicable pH and pollutant concentration range, and can be effectively applied to efficient degradation of nitrogen heterocyclic pesticide.

The invention discloses a preparation method of an iron-cobalt-based magnetic matrix material and application of the iron-cobalt-based magnetic matrix material in immobilized trypsin, the material structure is controlled by changing the proportion of iron and cobalt and preparation conditions, porous iron-cobalt matrixes with different structures and morphologies are prepared, then the surfaces of the porous iron-cobalt matrixes are coated with silicon dioxide, and the iron-cobalt-based magnetic matrix material is prepared. And forming a silicon dioxide coating, performing alkali etching on the silicon dioxide coating to form small dents on the surface, and further performing pore expansion by using salts with different concentrations to prepare the iron-cobalt-based magnetic matrix material. And combining the iron-cobalt-based magnetic matrix material with trypsin to obtain the immobilized trypsin. The preparation method has the beneficial effects that the material preparation process is simple, the magnetism of the matrix material is strong and stable, and the surface area is large, so that the modification capacity of trypsin is improved, and meanwhile, the prepared immobilized trypsin has different pore structures and material morphologies, can realize rapid and efficient enzymolysis of protein, and has a magnetic separation effect.

The invention discloses a ferrocobalt bimetal hydrogen evolution catalyst and a preparation method and application thereof, and relates to the technical field of water electrolysis hydrogen production, the ferrocobalt bimetal hydrogen evolution catalyst comprises a Co-ZIF material and an Fe element freely dispersed in a cavity of the Co-ZIF material; based on the total weight of the catalyst being 100%, the weight percentage of the Co element in the catalyst is 32%-50%; the weight percentage of the Fe element in the catalyst is 1%-12%. The synergistic effect of the bimetallic active sites of the catalyst can improve the water electrolysis hydrogen evolution activity of the material and promote the transfer and transfer of electrons in the system, and the catalyst has excellent hydrogen evolution performance. Under the condition of 1MKOH, when the current density can reach 10mA / cm < 2 >, the hydrogen evolution overpotential of the working electrode can reach 177mV, the 12-hour attenuation rate can reach 1.58%, and the Tafel slope can reach 98mV / dec.