154 results about "Amorphous ribbon" patented technology

Provided are a magnetic field shield sheet for a wireless charger, which blocks an effect of an alternating-current magnetic field generated when a charger function for a portable mobile terminal device is implemented in a non-contact wireless manner on a main body of the portable mobile terminal device and exhibits excellent electric power transmission efficiency, a method of manufacturing the sheet, and a receiver for the wireless charger by using the sheet. The sheet includes: at least one layer thin magnetic sheet made of an amorphous ribbon separated into a plurality of fine pieces; a protective film that is adhered on one surface of the thin magnetic sheet via a first adhesive layer provided on one side of the protective film; and a double-sided tape that is adhered on the other surface of the thin magnetic sheet via a second adhesive layer provided on one side of the double-sided adhesive tape, wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers, to thereby isolate the plurality of fine pieces.

The invention relates to a method of producing a strip of nanocrystalline material which is obtained from a wound ribbon that is cast in an amorphous state, having atomic composition [Fe1-a-bCoaNib]100-x-y-2-alpha-beta-gamma Cu<x>Si<y>BzNbalphaM'betaM''gamma, M' being at least one of elements V, Cr, Al and Zn, and M being at least one of elements C, Ge, P, Ga, Sb, In and Be, with: a <= 0.07 and b = 0.1, 0.5 <= x <=1.5 and 2 <= a <= 5, 10 <= y <= 16.9 and 5 <= z <= 8, beta <= 2 and gamma <= 2. According to the invention, the amorphous ribbon is subjected to crystallisation annealing, in which the ribbon undergoes annealing in the unwound state, passing through at least two S-shaped blocks under voltage along an essentially longitudinal axial direction of the ribbon, such that the ribbon is maintained at an annealing temperature of between 530 DEG C and 700 DEG C for between 5 and 120 seconds and under axial tensile stress of between 2 and 1000 Mpa. The tensile stress applied to the amorphous ribbon, the displacement speed of the ribbon during annealing and the annealing time and temperature are all selected such that the cross-section profile of the strip is not in the form of Omega and the maximum deflection of the cross-section of the strip is less than 3% of the width of the strip and preferably less than 1% of the width. The invention also relates to the strip and the core thus obtained and to the device used to implement the method.

Disclosed in this invention is a family of ternary and multi-nary iron-based new compositions of bulk metallic glasses which possess promising soft magnetic properties, and the composition selection rules that lead to the design of such new compositions. The embodiment alloys are represented by the formula M_aX_bZ_c, where M represents at least one of ferromagnetic elements such as iron and may partly be replaced by some other substitute elements; X is an element or combinations of elements selected from those with atomic radius at least 130% that of iron and in the mean time is able to form an M-rich eutectic; and Z is an element or combinations of elements selected from semi-metallic or non-metallic elements with atomic radius smaller than 86% that of iron and in the meantime is able to form an M-Z eutectic; a, b, c are the atomic percentage of M, X, Z, respectively, and a+b+c=100%. When 1%<b<15% and 10%<c<39%, the alloys show a bulk glass forming ability to cast amorphous ribbons/sheets at least 0.1 mm in thickness. When 3%<b<10% and 18%<c<30%, the alloys show a bulk glass forming ability to cast amorphous rods at least 1 mm in diameter. The amorphous phase of these as-cast sheets/rods is at least 95% by volume. This invention also discloses the existence of nano-crystalline phase outside of the outer regime of the bulk glass forming region mentioned above.

The invention relates to an one-step heat treatment preparation process method for a soft nanocrystalline magnetic powder core and belongs to a nanocrystalline magnetic powder core preparation technology. Amorphous ribbon fragments of which the component is Fe73.5Cu1Nb3Si13.5B9 are directly placed into a high-energy omnibearing planetary ball mill to carry out ball milling crushing without being subjected to heat treatment; the crushed amorphous ribbon fragments are sieved into amorphous powder with different particle sizes and the amorphous powder is mixed; the mixed amorphous powder is passivated and dried in phosphoric acid solution; the passivated amorphous powder is uniformly mixed with an insulating binding agent in a wet mode; the mixture is subjected to heating volatilization and insulating coating; the amorphous powder subjected to insulating coating is placed into a die to be subjected to pressing forming; and after a formed magnetic powder core is subjected to heat treatment under the protection of inert gas, the magnetic powder core is impregnated in insulating glue. The one-step heat treatment preparation process method has high magnetic conductivity, low loss and high stability; meanwhile, preparation process steps are reduced; and production energy consumption of the nanocrystalline magnetic powder core is reduced.

The invention relates to a block-shaped nanocrystalline magnetically soft alloy material and a preparation method thereof. The block-shaped nanocrystalline magnetically soft alloy material is an Fe-Co-Cu-B-X alloy material and contains the following atomic content of each component in percentage by weight in the total atomic weight of the alloy material: 42-45% of Fe, 42-45% of Co, 0.5-1.5% of Cu, 6-10% of B and 3-8% of X, wherein X is selected from one or two of Nb and Sm. The preparation method of the block-shaped nanocrystalline magnetically soft alloy material comprises the following steps: smelting, thin amorphous ribbon spurting, heat treatment, pulverization and spark plasma sintering. The block-shaped nanocrystalline magnetically soft alloy material has higher Curie temperature and saturated magnetization intensity and extensive application.

The invention provides an online reeling device for an amorphous ribbon. The device comprises a first reeling shaft, a second reeling shaft, a rotary platform and a working platform. The first reeling shaft and the second reeling shaft are respectively arranged at two sides of the rotary platform of the working platform. The first reeling shaft and the second reeling shaft are respectively provided with a first reeling cylinder and a second reeling cylinder. The first reeling cylinder is located on a reeling station and reels the amorphous ribbon through negative pressure. After the amorphous ribbon is fully reeled, the amorphous ribbon is broken through a breaking shear. A reeling platform rotates 180 degrees. After the second reeling cylinder arrives at the reeling station, working steps of the first reeling cylinder are repeated. When the second reeling cylinder reels the amorphous ribbon, the first reeling cylinder unloads the ribbon, a hollow reeling cylinder is assembled and prepares for reeling the amorphous ribbon and continuous grabbing of the amorphous ribbon is achieved. The online reeling device for the amorphous ribbon is particularly suitable for online automatic reeling of the mass produced amorphous ribbon in industry.

The invention discloses a preparation method of an iron-based amorphous nanocrystalline soft magnetic alloy for industrial production. The preparation method comprises the following steps: firstly, preparing master-alloy raw materials; smelting the master-alloy raw materials repeatedly, and casting into an alloy ingot; smashing the alloy ingot, re-smelting, and covering the molten alloy with a steel-making slag forming agent; preparing an amorphous ribbon through quenching by using a single roller; putting the obtained amorphous ribbon into a vacuum annealing furnace, annealing isothermally, and crystallizing; and cooling the amorphous ribbon to room temperature in the vacuum annealing furnace to obtain the iron-based amorphous nanocrystalline soft magnetic alloy. The amorphous ribbon can be wound into a magnetic core with the sizes of 13.2mm*21.5mm*10mm before being nano-crystallized. Because the preparation method adopts low-cost industrial raw materials, the cost of the iron-based amorphous nanocrystalline soft magnetic alloy can be reduced greatly. The prepared iron-based amorphous nanocrystalline soft magnetic alloy has high magnetic conductivity and low loss.

The present invention provides an amorphous alloy ribbon superior in magnetic characteristics and lamination factor by defining the slip property of the amorphous alloy ribbon surface in a specific range, that is, an amorphous alloy ribbon superior in magnetic characteristics and lamination factor produced by the single roll method, characterized in that the slip property of the ribbon surface satisfies the following equation:

0.1≦F=P/M≦1.0

• • where, F is the slip friction coefficient, P is the force pulling the intermediate part of the amorphous ribbon when applying weight from above to three amorphous ribbons stacked together, and M is the load applied from the top of the amorphous ribbon (5 kg).

The invention discloses a method and system for preparing a winding-free high-efficiency amorphous ribbon. The method comprises the steps that a plurality of small-bore small melt spraying holes are formed in a melt nozzle at certain intervals, and after a mother alloy molten mass injected out of the small-bore small spraying holes is sprayed to a rapid quenching cooling roll face, the amorphous ribbon is formed independently; the system for preparing the winding-free high-efficiency amorphous ribbon comprises a blending device, a throw-preparing device and an amorphous ribbon automatic collector. The mother alloy is heated to be molten through the high-frequency induction technology, and the alloy melt is sprayed to the cooling roll face which is provided with a transverse groove and rotates fast through the spraying holes with the diameter smaller than 1 mm, wherein the surface of the cooling roll face is polished. The alloy melt sprayed to the cooled roll face is fast cooled on the smooth roll face to form the amorphous ribbon with even thickness and width.

The invention discloses an automatic multi-crucible combined amorphous ribbon making machine. The amorphous ribbon making machine comprises a frame, and is characterized in that a base is arranged on the frame; a processing mechanism, a revolving shaft driving device and a stripper are arranged on the base; the processing mechanism comprises a support frame, a revolving shaft, a guide seat, a movable seat and a cooling roller; an upright post stage is arranged on the frame; a control mechanism is arranged in the upright post stage; a rotatable upright post is arranged on the upright post stage; servo motors, coil units and crucible bases are arranged on the outer side of the upright post; rotatable crucibles are arranged in the crucible bases; the servo motors can be used for adjusting the lifting of the crucible bases; the inner diameters of the coil units are greater than the outer diameters of the crucible bases, and the coil units can be lifted; an uncovering device is arranged on the top of the upright post; the control mechanism is connected with the components of the servo motor, the coil units and the crucible bases to realize automatic control of the entire machine. The amorphous ribbon making machine is safe and reliable, high in processing accuracy and wide in application range, and can fully meet the market demand of high-quality amorphous ribbons.

A manufacturing method of an amorphous soft magnetic core using a Fe-based amorphous metallic powder includes size-sorting an amorphous metallic powder obtained by pulverizing an amorphous ribbon prepared by a rapid solidification process (RSP) and then using the amorphous metallic powder having a particle size distribution so as to comprise 10 to 85 wt. % of powder having a particle size of 75 to 100 μm, 10 to 70 wt. % of powder having a particle size of 50 to 75 μm, and 5 to 20 wt. % of powder having a particle size of 5 to 50 μm to manufacture an amorphous soft magnetic core with excellent high-current DC bias characteristic and good core loss characteristic.

The invention discloses a slitting-free non-winding amorphous ribbon preparation method and a preparation system. According to the preparation method, a plurality of grooves are formed in a cooling roller face perpendicular to the rotating direction of a rapid-quenching cooling roller so that an amorphous ribbon can be automatically broken at groove positions in the throwing process, and a segment-shaped amorphous ribbon is formed. The preparation system comprises a melting device, a throwing device and an automatic segment-shaped amorphous ribbon collector. By means of the preparation method and the preparation system, the segment-shaped amorphous ribbon with a needed length can be directly obtained in the throwing process of the amorphous process, the redundant procedures that in the prior art, the amorphous ribbon is wound firstly and then is disengaged from a disk and slit are omitted, the production efficiency is improved, the production cost and the equipment investment are reduced, and meanwhile, the situation that as stress action is introduced by winding, the performance of the amorphous ribbon is reduced is avoided.