US 12,272,470 B2
Alnico-based hard magnetic particle and method for manufacturing the same
Soo Dong Kim, Daejeon (KR); Won Kyun Choe, Daejeon (KR); Sung Hyun Joo, Sejong (KR); Hong Keon Kim, Daejeon (KR); and Hyun Soo Kim, Daejeon (KR)
Assigned to KOREA MINTING, SECURITY PRINTING & IDCARD OPERATING CORP., Daejeon (KR)
Appl. No. 17/413,553
Filed by KOREA MINTING, SECURITY PRINTING & IDCARD OPERATING CORP., Daejeon (KR)
PCT Filed Aug. 5, 2019, PCT No. PCT/KR2019/009706
§ 371(c)(1), (2) Date Jun. 13, 2021,
PCT Pub. No. WO2021/020634, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 10-2019-0091610 (KR), filed on Jul. 29, 2019.
Prior Publication US 2022/0172867 A1, Jun. 2, 2022
Int. Cl. H01F 1/047 (2006.01); B41M 3/14 (2006.01); C09D 11/03 (2014.01); C22C 30/02 (2006.01); C23C 18/16 (2006.01); C23C 18/44 (2006.01); H01F 1/06 (2006.01)
CPC H01F 1/047 (2013.01) [B41M 3/14 (2013.01); C09D 11/03 (2013.01); C22C 30/02 (2013.01); C23C 18/1637 (2013.01); C23C 18/1651 (2013.01); C23C 18/44 (2013.01); H01F 1/06 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A magnetic particle comprising:
an AlNiCo-based hard magnetic particle disposed at an inside of the magnetic particle and comprising Al, Ni, Co, Cu, and Ti, with a remainder of the AlNiCo-based hard magnetic particle being Fe,
wherein the AlNiCo-based hard magnetic particle has a Co content between 10% by weight to 17% by weight, a Ni content is between 18% by weight and 25% by weight, an Al content is between 4% by weight and 9% by weight, a Cu content is between 1% by weight and 4% by weight, and a Ti content is between 2% by weight and 5.5% by weight and has a coercive force between 250 Oe and 450 Oe and a residual magnetization/coercive force ratio of 0.06 or more, and
wherein a sum of a Co content and a Ni content is a value between 32% by weight and 40% by weight.