Low-cost double-main-phase Ce permanent magnet alloy and its preparation method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9892832
SERIAL NO

13831910

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The invention discloses a low-cost double-main-phase Ce permanent magnet alloy and its preparation method, and belongs to technical field of rare earth permanent magnet material. The Ce permanent magnet alloy has a chemical formula of (Cex,Re1-x)aFe100-a-b-cBbTMc in mass percent, wherein 0.4≦x≦0.8, 29≦a≦33, 0.8≦b≦1.5, 0.5≦c≦2, Re is one or more selected from Nd, Pr, Dy, Tb and Ho elements, and TM is one or more selected from Ga, Co, Cu, Nb and Al elements; the Ce permanent magnet alloy has a double-main-phase structure with a low HA phase in (Ce,Re)—Fe—B and a high HA phase in Nd—Fe—B. The double-main-phase Ce permanent magnet alloy of the present invention prepared by using a double-main-phase alloy method greatly lowers the production cost of magnet while maintaining excellent magnetic performances.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
CENTRAL IRON AND STEEL RESEARCH INSTITUTE100081 NO 76 SOUTH COLLEGE ROAD BEIJING HAIDIAN DISTRICT BEIJING CITY BEIJING CITY 100081

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Feng, Haibo Beijing, CN 6 6
Huang, Shulin Beijing, CN 3 5
Li, Anhua Beijing, CN 11 782
Li, Wei Beijing, CN 2284 14552
Li, Yanfeng Beijing, CN 65 111
Sun, Yachao Beijing, CN 1 4
Wang, Jingdai Beijing, CN 10 24
Zhu, Minggang Beijing, CN 2 5

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Aug 13, 2025
11.5 Year Payment $7400.00 $3700.00 $1850.00 Aug 13, 2029
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00