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US 12,119,150 B2Granted
Method for producing sintered magnet and sintered magnet
AssigneeLG Chem, Ltd.
InventorsNakheon Sung, Ingyu Kim, Soon Jae Kwon, Jinhyeok Choe, Hyounsoo Uh, Tae Hoon Kim
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Abstract
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.
Claims8
A method for producing a sintered magnet, comprising:
- 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,
- sintering the mixed powder to form a sintered magnet, and
- forming the R—Al—Cu powder as the sintering agent,
- wherein the forming the R—Al—Cu powder comprises:
- mixing RH2 powder, Al powder, and Cu powder to form a sintered precursor,
- agglomerating the sintered precursor,
- raising a temperature of the agglomerated sintered precursor to form a metal alloy, and
- pulverizing the metal alloy to form the sintering agent.
6 more elements
Dependencies are inferred from the claim text.