A method for producing a powdered starting material, which is provided for production of rare earth magnets, including includes the following steps: pulverizing an alloy, including at least one rare earth metal, wherein a powdered intermediate product is formed from the alloy including the at least one rare earth metal, and carrying out at least one classification aimed at particle size and/or particle density for the powdered intermediate product. A fraction of the powdered intermediate product, which is formed by the at least one classification, is used for fabrication of rare earth magnets. Furthermore, at least one dynamic classifier is provided, implementing at least one classification directed at particle size and/or particle density for the powdered intermediate product and thereby separates the fraction from the powdered intermediate product, which forms the starting material for manufacturing rare earth magnets.

An apparatus for assembling a repelling magnet combination, comprising a first and second magnet, a first and second holding magnet, a first holding base with a first holding base first end, and a second holding base with a second holding base first end. The first and second holding magnets are positioned at the first and second holding base first ends, and the first and second magnets are magnetically attached to the first and second holding magnets respectively, with outward faces exhibiting like magnetic polarities. The first and second magnets are brought into contact by moving the first and second holding base first ends into close proximity, whereby the first and second holding magnets exert holding forces on the first and second magnets which overcome a repelling force generated therebetween, allowing a repelling force countering means, such as an adhesive, to bond the magnets together into a repelling magnet combination.

In an exemplary embodiment, a multilayer coil component includes: a substrate body; and a coil embedded in the substrate body and containing a wound conductor; wherein the substrate body has: magnetic layers containing multiple metal magnetic grains, provided around conductor layers that constitute parts of the wound conductor in a direction roughly orthogonal to the coil axis of the coil; and multiple high-hardness insulating grains harder than the multiple metal magnetic grains and smaller in average grain size than the multiple metal magnetic grains, provided between a pair of the conductor layers adjacent to each other in the direction of the coil axis and also between a pair of the magnetic layers adjacent to each other in the direction of the coil axis. The multilayer coil component can prevent shorting in the wound conductor while increasing the inductance.

A method for manufacturing a magnet includes (1) a step of preparing three or more unmagnetized magnet materials of which magnetization easy axes are oriented in predetermined directions, and adhering the unmagnetized magnet materials with each other to make an assembly, and (2) a step of applying a curved pulse magnetic field to the assembly to magnetize the assembly, wherein in the step (2), the unmagnetized magnet materials are magnetized into magnet blocks, and an angle θ (where 0≤θ≤180 degrees holds) formed by magnetization directions of at least a pair of magnet blocks adjacent to each other is in a range of 30 degrees to 120 degrees.

The invention discloses a manufacturing method of magnet unit for wireless charging, including the steps: installing multiple magnetic elements onto a first carrier made of non-magnetic material; moving the first carrier into a magnetizing machine to magnetize all the magnetic elements so that each magnetic element becomes a magnet piece, an N-pole and an S-pole are formed on different portions of the same surface of the magnet piece; installing the magnet pieces onto a second carrier made of magnetically permeable material to form a magnet unit, the magnet pieces are defined in an annular array around the central axis of the second carrier installed on a wireless charging base, the magnet unit cooperates with a charging coil of the wireless charging base to charge a wireless headset. The invention simplifies the manufacturing process and ensures the consistency of magnet pieces in the same magnet unit, also improves the manufacturing efficiency.

A high-performance Nd—Fe—B isotropic magnetic powder and a preparation method thereof are disclosed. The method includes S1, smelting and refining ingredients under vacuum to obtain an alloy ingot, crushing the alloy ingot to obtain an alloy block, wherein the smelting is conducted at a temperature of 1,350-1,450° C., and the refining is conducted at a temperature of 1,335-1,430° C. and a pressure of 900-1,100 Pa in an inert gas atmosphere for 3-7 minutes; S2, melting the alloy block obtained in step S1 to obtain an alloy solution, rapidly quenching the alloy solution to form a Nd—Fe—B rapidly-quenched alloy plate; S3, crushing the Nd—Fe—B rapidly-quenched alloy plate obtained in step S2 to obtain a magnetic powder; S4, subjecting the magnetic powder to a crystallization heat treatment in an inert gas atmosphere, and cooling to obtain the Nd—Fe—B isotropic magnetic powder.

A method is provided for the heat treatment of an object comprising at least one rare-earth element with a high vapor pressure. One or more objects comprising at least one rare-earth element with a high vapor pressure are arranged in an interior of a package. An external source of the at least one rare-earth element is arranged so as to compensate for the evaporation of this same rare-earth element from the object and/or to increase the vapor pressure of the rare-earth element in the interior of the package, and the package is heat treated.

A sintered Nd—Fe—B magnet comprising at least one light rare earth element having a weight content between 31 wt. % and 35 wt. %, at least one heavy rare earth element having a weight content of no more than 0.2 wt. %, B having a weight content between 0.95 wt. % and 1.2 wt. %, at least one additive including Ti and having a weight content between 1.31 wt. % and 7.2 wt. %, Fe as a balance, and impurities including C, O, and N. Ti has a weight content between 0.3 wt. % and 1 wt. % and forms a Titanium-Iron-Boron phase with Fe and Boron B and being present in the sintered Nd—Fe—B magnet between 0.86 vol. % and 2.85 vol. %. The C, O, and N satisfy 630 ppm≦1.2C+0.6O+N≦3680 ppm. The sintered Nd—Fe—B magnet has a squareness factor of at least 0.95.

A construction magnetic panel is provided having a flexible base formed with front and internal sides and including magnetic particles placed within the body of the panel. The magnetic particles are operated within a working temperature range between −60 and +120° C., whereby the magnetic particles are characterized by the maximum energy product (BH).sub.max within the range between 2,0 and 100,00 kJ/m.sup.3 and are capable of magnetic interaction with external magnetically susceptible materials.

Disclosed is a method and a device for retrieving, from an object A, elements G present in a matrix M, the method including at least the following steps: bringing said abject A into contact with a dense fluid Fd with a molar mass greater than 2 g mol.sup.−1 under temperature T.sub.1 and pressure P.sub.1 conditions suitable for transforming the intergranular phase and for releasing the elements G, modifying the temperature T.sub.2 and/or pressure P.sub.2 values to stop the reaction transforming the intergranular phase, and recovering the elements G separated front the matrix M.