A rare earth sintered magnet is produced by depositing a coating of rare earth-containing particles on the surface of a rare earth magnet body, and heat treating the magnet body for causing absorption and diffusion of rare earth element in the magnet body. The depositing step utilizes a particle impingement phenomenon.

A rare earth sintered magnet is produced by depositing a coating of rare earth-containing particles on the surface of a rare earth magnet body, and heat treating the magnet body for causing absorption and diffusion of rare earth element in the magnet body. The depositing step utilizes a particle impingement phenomenon.

The present invention aims at providing an iron-nitrogen-based soft magnetic steel sheet having a saturation magnetic flux density higher than that of pure iron, a method for manufacturing the soft magnetic steel sheet, and a core and a dynamo-electric machine in which the soft magnetic steel sheet is used. The soft magnetic steel sheet according to the present invention includes C, N, and the balance of Fe and inevitable impurities and is comprised of an α phase, an α′ phase, an α″ phase, and a γ phase. The α phase serves as a main phase, a volume ratio of the α″ phase is 10% or more, and a volume ratio of the γ phase is 5% or less. The core according to the present invention includes a laminated body of the soft magnetic steel sheets.

A magnet material is represented by a composition formula 1: R.sub.xNb.sub.yB.sub.xM.sub.100x-y-z, R is at least one element selected from the group consisting of rare-earth elements, M is at least one element selected from the group consisting of Fe and Co, x is a number satisfying 4≤x≤10 atomic %, y is a number satisfying 0.1≤y≤8 atomic %, and z is a number satisfying 0.1≤z≤12 atomic %. The magnet material includes: a main phase having a TbCu.sub.7 crystal phase; and a grain boundary phase. The magnet material satisfies a relation of n.sub.Nb2/n.sub.Nb1>5, where n.sub.Nb1 is an average Nb concentration in the TbCu.sub.7 crystal phase and n.sub.Nb2 is a maximum Nb concentration in the grain boundary phase.

A magnet material is represented by a composition formula 1: R.sub.xNb.sub.yB.sub.xM.sub.100x-y-z, R is at least one element selected from the group consisting of rare-earth elements, M is at least one element selected from the group consisting of Fe and Co, x is a number satisfying 4≤x≤10 atomic %, y is a number satisfying 0.1≤y≤8 atomic %, and z is a number satisfying 0.1≤z≤12 atomic %. The magnet material includes: a main phase having a TbCu.sub.7 crystal phase; and a grain boundary phase. The magnet material satisfies a relation of n.sub.Nb2/n.sub.Nb1>5, where n.sub.Nb1 is an average Nb concentration in the TbCu.sub.7 crystal phase and n.sub.Nb2 is a maximum Nb concentration in the grain boundary phase.

A Sm—Fe—N-based rare earth magnet more resistant to demagnetization than ever before, particularly at high temperatures, and a production method thereof are provided.

The present disclosure presents a production method of a rare earth magnet, including mixing a SmFeN magnetic powder and a modifier powder to obtain a mixed powder, compression-molding the mixed powder in a magnetic field to obtain a magnetic-field molded body, pressure-sintering the magnetic-field molded body to obtain a sintered body, and heat-treating the sintered body, and a rare earth magnet obtained by the method. D.sub.50 of the magnetic powder is 1.50 μm or more and 3.00 μm or less, the content ratio of the zinc component in the modifier powder is 6 mass % or more and 30 mass % or less, and the heat treatment temperature is 350° C. or more and 410° C. or less.

A vehicle window glass comprises a glass substrate layer, an electrically conductive layer forming a conductive pattern over the glass substrate, a lead-free solder layer on the conductive layer and a metal plate element of an electrical connector on the solder layer. Optionally a coloured ceramic band layer is sintered between the glass substrate layer and the conductive layer. The thickness of the metal plate element is between 0.5 mm and 0.7 mm.

An R-T-B based sintered magnet containing a first heavy rare earth element, in which R includes Nd, T includes Co and Fe, the first heavy rare earth element includes Tb or Dy, the R-T-B based sintered magnet has a region in which a concentration of the first heavy rare earth element decreases from the surface toward the inside, a first grain boundary phase which contains the first heavy rare earth element and Nd but does not contain Co is present in one cross section including the region, and an area occupied by the first grain boundary phase in one cross section including the region is 1.8% or less.

An R-T-B based sintered magnet containing a first heavy rare earth element, in which R includes Nd, T includes Co and Fe, the first heavy rare earth element includes Tb or Dy, the R-T-B based sintered magnet has a region in which a concentration of the first heavy rare earth element decreases from the surface toward the inside, a first grain boundary phase which contains the first heavy rare earth element and Nd but does not contain Co is present in one cross section including the region, and an area occupied by the first grain boundary phase in one cross section including the region is 1.8% or less.

The present invention involves a graphene-containing rare earth permanent magnet material and preparation method thereof. The graphene-containing rare earth permanent magnet material, comprising: 20.6 to 23.4 weight percent of neodymium, 6.6 to 7.5 weight percent of praseodymium, 0.95 to 1.20 weight percent of boron, 0.4 to 0.6 weight percent of cobalt, 0.11 to 0.15 weight percent of copper, 2.0 to 2.4 weight percent of lanthanum, 1.7 to 2.1 weight percent of cerium, 1 to 5 weight percent of graphene, a remainder being iron. The graphene-containing rare earth permanent magnet material exhibits excellent temperature resistance, good conductivity and magnet properties even without any heavy rare earth elements like terbium or dysprosium, which dramatically reduces the cost, promotes the efficient utilization of rare earth resources and improves product quality. The preparation method within this invention is simple to realize, easy to control, cost-effective and has high production efficiency and stable product performances.