National Institute of Advanced Industrial Science and Technology

Murata Manufacturing Co., Ltd.

Tdk Corporation

Kitagawa Industries Co., Inc.

Kenta Takagi

Yasushi Enokido

Kimihiro Ozaki

Shusuke Okada

Ryuji Hashimoto

Wataru Yamaguchi

Takaaki Yokoyama

Yoshinori Fujikawa

Hideo Yumi

Yasuhiro Kawaguchi

Kenji Sakaguchi

Hiroki Kitano

Yuji Yokoyama

Satoshi Oga

Kazuhiro Yoshii

Kazuyuki Suzuki

Yusuke Hirayama

Akihide Hosokawa

Yosuke Sato

Ryoichi Yamagata

A Sm—Fe—N-based magnet powder that includes a Sm—Fe—N-based magnetic material powder, wherein an average particle size of the Sm—Fe—N-based magnetic material powder is not larger than 5 μm, and a full width at half maximum of a diffraction peak of a (220) plane in an X-ray diffraction profile of the Sm—Fe—N-based magnetic material powder is not larger than 0.0033 Å. Also disclosed is a Sm—Fe—N-based sintered magnet that includes a sintered body of a Sm—Fe—N-based magnetic material, wherein an average grain size of crystal grains of the Sm—Fe—N-based magnetic material is not larger than 5 μm, and a full width at half maximum of a diffraction peak of a (220) plane in an X-ray diffraction profile of the Sm—Fe—N-based magnetic material is not larger than 0.0033 Å.

Sm—Fe—N-based magnet powder, Sm—Fe—N-based sintered magnet, and production method therefor

A single crystal particle powder having a crystal structure of TbCu-type of the present invention is represented by the general formula:[Chemical Formula 1](RM)T  (1)or the general formula:[Chemical Formula 2](RM)TN  (2)and has a crystal structure of TbCu-type,wherein R is at least one element selected from the group consisting of Sm and Nd, T is at least one element selected from the group consisting of Fe and Co, x is 7.0≤x≤10.0, y is 1.0≤y≤2.0, and z is 0.0≤z≤0.3.

Metastable single-crystal rare earth magnet fine powder and method for producing same

One embodiment of the present invention includes, in a samarium-iron-nitrogen based magnet powder, a main phase containing samarium and iron, and a sub-phase containing samarium, iron, and at least one or more elements selected from the group consisting of zirconium, molybdenum, vanadium, tungsten, and titanium, wherein an atomic ratio of a rare earth element to an iron group element is greater than an atomic ratio of the rare earth element to the iron group element of the main phase, wherein at least a part of a surface of the main phase is coated with the sub-phase.

Samarium-iron-nitrogen based magnet powder and method of manufacturing same, and samarium-iron-nitrogen based magnet and method of manufacturing same

A sintered magnet contains Sm&#x2014;Fe&#x2014;N-based crystal grains and has high coercivity; and a magnetic powder is capable of forming a sintered magnet without lowering the coercivity even if heat is generated in association with the sintering. A sintered magnet comprises a crystal phase composed of a plurality of Sm&#x2014;Fe&#x2014;N-based crystal grains and a nonmagnetic metal phase present between the Sm&#x2014;Fe&#x2014;N crystal grains adjacent to each other, wherein a ratio of Fe peak intensity Ito SmFeN peak intensity Imeasured by an X-ray diffraction method is 0.2 or less. A magnetic powder comprises Sm&#x2014;Fe&#x2014;N-based crystal particles and a nonmagnetic metal layer covering surfaces of the Sm&#x2014;Fe&#x2014;N crystal particles.

Magnetic powder containing Sm&#x2014;Fe&#x2014;N-based crystal particles, sintered magnet produced from same, method for producing said magnetic powder, and method for producing said sintered magnet

A samarium-iron-nitrogen alloy powder according to one embodiment of the present invention is characterized in that a value obtained by dividing the hydrogen content of the samarium-iron-nitrogen alloy powder by the BET specific surface area of the samarium-iron-nitrogen alloy powder is less than or equal to 400 ppm/(m/g), and a value obtained by dividing the oxygen content of the samarium-iron-nitrogen alloy powder by the BET specific surface area of the samarium-iron-nitrogen alloy powder is less than or equal to 11,000 ppm/(m/g).

Samarium-iron-nitrogen alloy powder and method for producing same

One embodiment of the present invention is that in samarium-iron-nitrogen magnet powder, a non-magnetic phase is formed on a surface of the samarium-iron-nitrogen magnet phase, and an arithmetic mean roughness Ra of the surface is 3.5 nm or less.

Samarium-iron-nitrogen magnet powder and method for manufacturing same

A raw material for a magnet, which comprises Sm and Fe. A magnet is obtained by nitriding this raw material for a magnet. In particular, a raw material for a magnet comprises an Sm&#x2014;Fe binary alloy as a main component. An intensity ratio of an SmFe(024) peak to an SmFe(110) peak is less than 0.001 as measured by an X-ray diffraction method.

Raw material for magnet, which comprises Sm&#x2014;Fe binary alloy as main component, method for producing the same, and magnet

In a thermoelectric conversion module, each of a p-type element and an n-type element is configured by aligning a plurality of particles in series and connecting the particles to each other. Around a connection part in which the particles are connected to each other, a protrusion is protruded. The protrusion has a shape of continuously extending around the entire periphery of the connection part. The protrusion may be partly interrupted, but in such a case, a circumferential length of one interrupted portion is less than one half of the periphery of the connection part.

Thermoelectric conversion element, manufacturing method for the thermoelectric conversion element, and thermoelectric conversion module

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Nagoya, Japan

Kenta Takagi