A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH.sub.2O/PH.sub.2 is controlled, an annealing separator applying process where a mass ratio of MgO and MCl in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas without hydrogen, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.

This grain-oriented electrical steel sheet does not have a forsterite film present between a base steel sheet and a tension-insulation coating, in which the base steel sheet contains a predetermined element in a predetermined amount, and in a case in which a cross section perpendicular to a rolling direction of the base steel sheet is viewed, when a region having a length of 10 μm from a surface of the base steel sheet toward the inside of the base steel sheet in a sheet thickness direction of the base steel sheet and a length of 20 mm in a direction perpendicular to the sheet thickness direction is an observation region, needle-like inclusions having a length of 1 μm or more are not present in the observation region.

An insulator-coated soft magnetic powder includes a core particle including a base portion containing a soft magnetic material and an oxide film that is provided on a surface of the base portion and that contains an oxide of an element contained in the soft magnetic material, and an insulating particle that is provided on a surface of the core particle and that has an insulating property, wherein an average particle diameter after heat treatment after being subjected to a heat treatment of heating at 1000° C. is 90% or more and 110% or less of an average particle diameter before heat treatment before being subjected to the heat treatment.

A method for manufacturing a grain-oriented electrical steel sheet includes: heating a steel slab having a prescribed chemical composition to lower than 1250° C. and subjecting the steel slab to hot rolling to obtain a hot-rolled steel sheet; performing hot-band annealing on the hot-rolled steel sheet; pickling the hot-rolled steel sheet which has been subjected to the hot-band annealing; subjecting the hot-rolled steel sheet which has been subjected to the pickling to cold rolling to obtain a cold-rolled steel sheet having a final sheet thickness d of 0.15 to 0.23 mm; performing a decarburization nitriding treatment including decarburization annealing and nitriding on the cold-rolled steel sheet; performing final annealing on the cold-rolled steel sheet which has been subjected to the decarburization nitriding treatment; and then applying a coating liquid for insulation coating formation to the cold-rolled steel sheet which has been subjected to the final annealing and baking the cold-rolled steel sheet. Sol. Al/N which is a mass ratio between Sol. Al and N in the steel slab and the final sheet thickness d satisfy a prescribed relational expression, the N content of the cold-rolled steel sheet which has been subjected to the decarburization nitriding treatment is 40 to 1000 ppm, and a decarburization annealing temperature in the decarburization annealing is lower than 1000° C.

In a production of a non-oriented electrical steel sheet comprising subjecting a slab containing a particular composition to a hot rolling, a hot-band annealing, a cold rolling to form a cold-rolled sheet and a finish annealing, a rolling reduction of a final finish rolling pass in the hot rolling is not less than 10%, and a coiling temperature is not higher than 620° C., and a soaking temperature in the finish annealing is 600 to 800° C. to achieve such properties that a recrystallization ratio is less than 100% as an area ratio, a strength C is not less than 2.0 and a strength difference C-D is not more than 2.0, where C is a strength at ϕ=0° and φ.sub.1=0° and D is a strength at ϕ=20° and φ.sub.1=0° in a section of ϕ.sub.2=45° of ODF obtained in a central layer of a sheet thickness.

To stably improve the magnetic flux density by utilizing induction heating and radiant heating during final annealing of a non-oriented electrical steel sheet. A method of manufacturing a non-oriented electrical steel sheet, including subjecting a slab having a predetermined chemical composition to hot rolling with or without performing hot-rolled sheet annealing, and then to cold rolling either once, or twice or more with intermediate annealing performed therebetween, and then to final annealing, where a material before final cold rolling has a recrystallization ratio of less than 80% and a {100}<011> intensity of 8 or less in a ¼ layer, and in the final annealing, an average heating rate from 600° C. to 720° C. is 50° C./s or higher, and an average heating rate from 720° C. to 760° C. is 5° C./s or higher.

A light-emitting device can be folded in such a manner that a flexible light-emitting panel is supported by a plurality of housings which are provided spaced from each other and the light-emitting panel is bent so that surfaces of adjacent housings are in contact with each other. Furthermore, in the light-emitting device, in which part or the whole of the housings have magnetism, the two adjacent housings can be fixed to each other by a magnetic force when the light-emitting device is used in a folded state.

According to an aspect of the present invention, a wireless power transmitting apparatus of a wireless charging system includes a substrate, a first bonding layer formed on the substrate, a soft magnetic layer formed on the first bonding layer, a second bonding layer formed on the soft magnetic layer and a transmitting coil formed on the second bonding layer, wherein at least one of the first bonding layer and the second bonding layer includes a magnetic substance.

A magneto-rheological elastomer that can achieve weight reduction, maintain mechanical properties at an excellent level, and improve magnetic flux density. A magneto-rheological elastomer includes an elastomer base material as a matrix and sendust flakes and spherical sendust powders. The magneto-rheological elastomer is made by mixing the sendust flakes and the spherical sendust powders in the elastomer base material.

A laminated core comprising a plurality of lamination sheets made of a soft magnetic alloy is provided. The lamination sheets have a main surface and a thickness d. The main surfaces of the lamination sheets are stacked one on top of another in a direction of stacking. Adjacent lamination sheets are joined to one another by a plurality of substance-to-substance joints, the joints being filler-free and entirely surrounded by the main surfaces of the adjacent lamination sheets.