Nippon Steel Sumitomo Metal Corporation

Santoku Corporation

Chuo Denki Kogyo Co., Ltd.

Akihiko Saguchi

Noriyuki Negi

Tatsuo Nagata

Mitsuharu Yonemura

Disclosed is an R-T-B&#x2014;Ga-based magnet material ahoy where R is at least one element selected from rare earth metals including Y and excluding Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and T is one or more transition metals with Fe being an essential element. The R-T-B&#x2014;Ga-based magnet material alloy includes: an RTB phasewhich is a principal phase, and an R-rich phase (and) which is a phase enriched with the R, wherein a non-crystalline phasein the R-rich phase has a Ga content (mass %) that is higher than a Ga content (mass %) of a crystalline phasein the R-rich phase. With this, it is possible to enhance the magnetic properties of rare earth magnets that are manufactured from the alloy and reduce variations in the magnetic properties thereof.

R-T-B&#x2014;Ga-based magnet material alloy and method of producing the same

The present invention provides a negative electrode material for a nonaqueous electrolyte secondary battery which can improve the cycle properties of a lithium ion secondary battery and a method for manufacturing the negative electrode material. The negative electrode material comprises at least two types of powdery alloy materials A and B in which powdery alloy material A contains Co, Sn, and Fe and does not contain Ti and powdery alloy material B contains Fe, Ti, and Sn, and the proportion of the mass of powdery alloy material B to the sum of the mass of powdery alloy material A and the mass of powdery alloy material B is at least 10 mass % and at most 30 mass %.

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Hannan, Japan

Akihiko Saguchi