Lg Chem, Ltd

Jinhyeok Choe

Soon Jae Kwon

Hyounsoo Uh

Ingyu Kim

Ikjin Choi

Eunjeong Shin

Tae Hoon Kim

Juneho In

Nakheon Sung

Jung Goo Lee

Sangwoo Kim

Jakyu Chun

Seung Ho Moon

Kwang Won Jeon

A method for producing a magnet powder is provided in the present disclosure. The method includes synthesizing a R—Fe—B-based magnet powder by a reduction-diffusion process, coating an antioxidant film onto a surface of the R—Fe—B-based magnet powder, and immersing and cleaning the R—F—B-based magnet powder in an aqueous solvent or a non-aqueous solvent, wherein R is Nd, Pr, Dy or Tb, and wherein the antioxidant film includes a compound containing at least one amino group.

Method for producing magnet powder and sintered magnet produced by the same

A method of producing a sintered magnet is disclosed herein. In some embodiments, a method of producing a sintered magnet comprises, sintering a R—Fe—B based magnetic powder to produce a sintered magnet; wherein the R is Nd, Pr, Dy, Ce or Tb, and infiltrating a eutectic alloy into the sintered magnet, wherein the eutectic alloy contains Pr, Al, Cu and Ga, and wherein infiltration the eutectic alloy includes applying the eutectic alloy to the sintered magnet and heat-treating the sintered magnet to which the eutectic alloy is applied.

Method of producing sintered magnet

A sintered magnet and a method for producing the same are provided. The method includes producing an R—Fe—B-based magnet powder by a reduction-diffusion method, adding a R—Al—Cu powder as a sintering agent to the R—Fe—B-based magnet powder to form a mixed powder, wherein the R—Al—Cu powder is an alloy of R, Al and Cu, and R is Nd, Pr, Dy, Tb or Ce, and sintering the mixed powder to form a sintered magnet.

Method for producing sintered magnet and sintered magnet

A magnetic powder and a method for fabricating the same according to an embodiment of the present disclosure are provided. The magnetic powder is powder particles synthesized using a mixture of a rare earth oxide, a raw material, a metal, a metal oxide and a reducing agent, wherein the powder particles are single-phase, the raw material includes at least one of Fe and Co, the metal includes at least one of Ti, Zr, Mn, Mo, V and Si, and the metal oxide includes at least one of MnO, MoO, VO, SiO, ZrOand TiO.

Magnetic powder and method of preparing magnetic powder

A sintered magnet and method of manufacturing the same are disclosed herein. According to an exemplary embodiment, a manufacturing method of a sintered magnet includes mixing the neodymium iron boron (NdFeB)-based powders and rare-earth hydride powders to prepare a mixture, heat-treating the mixture at a temperature of 600 to 850&#xb0; C., and sintering the heat-treated mixture at a temperature of 1000 to 1100&#xb0; C. to prepare the sintered magnet, wherein the rare earth hydride powders are neodymium hydride (NdH) powders or mixed powers of NdHand praseodymium hydride (PrH). In an embodiment, the NdFeB-based powders are prepared by a reduction-diffusion method.

Manufacturing method of sintered magnet, and sintered magnet

A method for producing a magnetic powder includes the steps of: mixing neodymium oxide, boron, and iron to prepare a first mixture; adding and mixing calcium to the first mixture to prepare a second mixture; mixing an alkali metal with the second mixture to prepare a third mixture; and placing a carbon sheet on the third mixture, placing silica sand (SiOsand) thereon, and then heating the same to a temperature of 800&#xb0; C. to 1100&#xb0; C.

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Daejeon, South Korea

Jinhyeok Choe