Toyota jidosha kabushiki kaisha (20240186036). R-T-B-BASED RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF simplified abstract

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R-T-B-BASED RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF

Organization Name

toyota jidosha kabushiki kaisha

Inventor(s)

Noritsugu Sakuma of Mishima-shi (JP)

Tetsuya Shoji of Susono-shi (JP)

Akihito Kinoshita of Mishima-shi (JP)

R-T-B-BASED RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240186036 titled 'R-T-B-BASED RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF

Simplified Explanation

The r-t-b-based rare earth magnet of the present disclosure includes a main phase having an rtb-type crystal structure and a grain boundary phase. The average grain size of the main phase is from 1.0 to 10,0 μm. The main phase has a core portion and a shell portion. The total content ratio of cerium, lanthanum, yttrium, and scandium is higher in the core portion than in the shell portion. The total content ratio of neodymium, praseodymium, gadolinium, terbium, dysprosium, and holmium is higher in the shell portion than in the core portion. The r-t-b-based rare earth magnet contains from 0.05 to 0.50 at % of carbon. The content ratio of the carbon is higher in the grain boundary phase than in the main phase.

  • Main phase with rtb-type crystal structure
  • Core and shell portions within the main phase
  • Different content ratios of cerium, lanthanum, yttrium, scandium, neodymium, praseodymium, gadolinium, terbium, dysprosium, holmium in core and shell portions
  • Presence of grain boundary phase with higher carbon content
  • Average grain size of main phase between 1.0 to 10.0 μm

Potential Applications

The technology can be applied in:

  • Electric motors
  • Generators
  • Magnetic resonance imaging (MRI) machines

Problems Solved

  • Improved magnetic properties
  • Enhanced performance in various applications
  • Better efficiency in energy conversion

Benefits

  • Higher magnetic strength
  • Increased durability
  • Improved energy efficiency

Potential Commercial Applications

Optimized for use in:

  • Automotive industry
  • Electronics manufacturing
  • Renewable energy sector

Possible Prior Art

Prior art may include:

  • Traditional rare earth magnets
  • Conventional magnet manufacturing processes

Unanswered Questions

How does the presence of different rare earth elements impact the magnetic properties of the magnet?

The specific role of each rare earth element in enhancing the magnet's performance is not detailed in the abstract. Further research may be needed to understand the individual contributions.

What specific applications within the electric motor industry can benefit from this technology?

While electric motors are mentioned as a potential application, the abstract does not specify the exact types of electric motors that could benefit from this rare earth magnet technology. Further exploration into this area may be necessary to identify specific opportunities.


Original Abstract Submitted

the r-t-b-based rare earth magnet of the present disclosure includes a main phase having an rtb-type crystal structure and a grain boundary phase . the average grain size of the main phase is from 1.0 to 10,0 �m. the main phase has a core portion and a shell portion . the total content ratio of cerium, lanthanum, yttrium and scandium is higher in the core portion than in the shell portion . the total content ratio of neodymium, praseodymium, gadolinium, terbium, dysprosium and holmium is higher in the shell portion than in the core portion . the r-t-b-based rare earth magnet contains from 0.05 to 0.50 at % of carbon. the content ratio of the carbon is higher in the grain boundary phase than in the main phase

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