Patents by Inventor Akinori Nishide
Akinori Nishide has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11251353Abstract: There is provided a thermoelectric material including a compound which is formed of an element R belonging to alkaline earth metal and lanthanoid, and an element X belonging to any of Group 13 elements, Group 14 elements, and Group 15 elements. The composition ratio of the element R and the element X is selected to obtain the compound having an AlB2 type structure.Type: GrantFiled: April 20, 2018Date of Patent: February 15, 2022Assignee: HITACHI, LTD.Inventors: Akinori Nishide, Jyun Hayakawa, Ken Kurosaki, Sora-at Tanusilp
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Patent number: 10833236Abstract: Provided are a p-type thermoelectric conversion material, a thermoelectric conversion module, and a method of manufacturing a p-type thermoelectric conversion material that are capable of obtaining high thermoelectric conversion characteristics. The p-type thermoelectric conversion material has a full Heusler alloy having a composition represented by the following General Formula (1) and has a relative density of 85% or more, FexTiyMAaMBb . . . (1), wherein in Formula (1), MA is one element selected from the group consisting of Si, Sn, and Ge, MB is one element selected from the group consisting of Al, Ga, and In, and x, y, a, and b are numbers set so that x+y+a+b=100, a+b=z, 50<x?52.5, 20?y?24.5, 24.5?z?29, a>0, and b>0 in atom %, respectively.Type: GrantFiled: December 27, 2017Date of Patent: November 10, 2020Assignee: Hitachi Metals, Ltd.Inventors: Naoto Fukatani, Akinori Nishide, Yosuke Kurosaki, Shin Yabuuchi, Jyun Hayakawa
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Patent number: 10727388Abstract: There is provided a thermoelectric conversion material formed of an Fe2TiSi-based full-Heusler alloy to which La is added, wherein La is solid-dissolved in the Fe2TiSi-based full-Heusler alloy.Type: GrantFiled: May 14, 2019Date of Patent: July 28, 2020Assignee: HITACHI METALS, LTD.Inventors: Akinori Nishide, Naoto Fukatani, Jyun Hayakawa
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Patent number: 10658562Abstract: In order to provide an Fe2TiSi type full-Heusler thermoelectric conversion material having a high dimensionless figure-of-merit ZT, the full-Heusler thermoelectric conversion material is characterized in that: the full-Heusler thermoelectric conversion material has secondary crystal grains having an Fe2TiSi type composition and a coating layer covering the circumference of the secondary crystal grains and containing an element other than Fe, Ti, and Si as a main component; and the coating layer has a composition containing an element being dissolvable in a crystal structure of the Fe2TiSi type composition and having an electric resistivity lower than the secondary crystal grains.Type: GrantFiled: October 6, 2016Date of Patent: May 19, 2020Assignee: HITACHI METALS, LTD.Inventors: Naoto Fukatani, Akinori Nishide, Yosuke Kurosaki, Jyun Hayakawa
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Patent number: 10497848Abstract: Provided is a thermoelectric conversion material formed from a full Heusler alloy represented by the composition formula: Fe2+?(Ti1??M1?)1??+?(Al1??M2?)1??. M1 represents at least one element selected from the group consisting of V, Nb and Ta, and M2 represents at least one element selected from the group consisting of Group 13 elements except for Al and Group 14 elements. ? satisfies the relation: 0<??0.42, ? satisfies the relation: 0??<0.75, and ? satisfies the relation: 0??<0.5. The valence electron concentration, VEC, satisfies the relation: 5.91?VEC<6.16.Type: GrantFiled: May 29, 2015Date of Patent: December 3, 2019Assignee: Hitachi, Ltd.Inventors: Yosuke Kurosaki, Naoto Fukatani, Jyun Hayakawa, Akinori Nishide, Shin Yabuuchi
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Patent number: 10454012Abstract: The present invention aims at providing a thermoelectric conversion module with low toxicity, which exhibits conversion efficiency equivalent to that of BiTe. The thermoelectric conversion module of the present invention employs a full Heusler alloy as the material for forming the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit. The material for forming the N-type thermoelectric conversion unit contains at least any one of Fe, Ti, and Si and Sn.Type: GrantFiled: May 22, 2012Date of Patent: October 22, 2019Assignee: Hitachi, Ltd.Inventors: Akinori Nishide, Yosuke Kurosaki, Jun Hayakawa, Shin Yabuuchi, Hiroyuki Yamamoto
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Patent number: 10297738Abstract: The present invention provides a metal-based thermoelectric conversion material having a high figure-of-merit ZT, the thermoelectric conversion material being a p-type or n-type full-Heusler alloy, having a composition of an Fe2TiA type (wherein A is Si and/or Sn), and including crystal grains having an average grain diameter of 30-500 nm. In particular, in the case where the composition of an Fe2TiA type is represented by the empirical formula Fe2+?Ti1+yA1+z, the values of ?, y, and z in an Fe—Ti-A ternary alloy phase diagram lie within the range ? surrounded by the points (50, 37, 13), (45, 30, 25), (39.5, 25, 35.5), (50, 14, 36), (54, 21, 25), and (55.5, 25, 19.5) in terms of (Fe, Ti, A) in at %.Type: GrantFiled: March 28, 2016Date of Patent: May 21, 2019Assignee: HITACHI METALS, LTD.Inventors: Akinori Nishide, Naoto Fukatani, Jyun Hayakawa
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Patent number: 10043963Abstract: In order to provide a thermoelectric conversion element which has a high Seebeck coefficient, a low thermal conductivity, and a high performance, even if the material system that has a low environmental load and can reduce the cost is used, the thermoelectric conversion element in which lattice points are classified into two or more kinds (A site and B site), lattices of which the kinds are different are connected to each other, the numbers of lattices of which the kinds are different are different (A site: 2, and B site: 1), and a lattice structure is configured by arranging nanoparticles or semiconductor quantum dots, includes areas of which conductivity types are different.Type: GrantFiled: January 31, 2013Date of Patent: August 7, 2018Assignee: HITACHI, LTD.Inventors: Shin Yabuuchi, Jun Hayakawa, Yosuke Kurosaki, Akinori Nishide, Yuji Suwa
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Patent number: 9559280Abstract: A thermoelectric conversion device includes a Heusler alloy film having a structure of B2 or L21 in notation of A2BC and a pair of electrodes on the Heusler alloy film to output an electromotive force generated by a thermal gradient in the Heusler alloy film. The thermoelectric conversion device further includes an electrode for applying an electric field or a voltage to the Heusler alloy film to increase and control an electric conductivity and a Seebeck coefficient S of the Heusler metal film. The device can control to increase an electric conductivity and Seebeck coefficient S by applying an electric field or a voltage through an insulation film to the Heusler alloy film. The device may have a shared connection to select one of outputs of a plurality of thermoelectric conversion devices arranged in a matrix or increase an electromotive force as an output.Type: GrantFiled: March 2, 2015Date of Patent: January 31, 2017Assignee: HITACHI, LTD.Inventors: Jun Hayakawa, Shin Yabuuchi, Masakuni Okamoto, Yosuke Kurosaki, Akinori Nishide
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Publication number: 20150280095Abstract: A thermoelectric conversion device includes a Heusler alloy film having a structure of B2 or L21 in notation of A2BC and a pair of electrodes on the Heusler alloy film to output an electromotive force generated by a thermal gradient in the Heusler alloy film. The thermoelectric conversion device further includes an electrode for applying an electric field or a voltage to the Heusler alloy film to increase and control an electric conductivity and a Seebeck coefficient S of the Heusler metal film. The device can control to increase an electric conductivity and Seebeck coefficient S by applying an electric field or a voltage through an insulation film to the Heusler alloy film. The device may have a shared connection to select one of outputs of a plurality of thermoelectric conversion devices arranged in a matrix or increase an electromotive force as an output.Type: ApplicationFiled: March 2, 2015Publication date: October 1, 2015Applicant: HITACHI, LTD.Inventors: Jun Hayakawa, Shin Yabuuchi, Masakuni Okamoto, Yosuke Kurosaki, Akinori Nishide
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Publication number: 20150179909Abstract: The present invention aims at providing a thermoelectric conversion module with low toxicity, which exhibits conversion efficiency equivalent to that of BiTe. The thermoelectric conversion module of the present invention employs a full Heusler alloy as the material for forming the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit. The material for forming the N-type thermoelectric conversion unit contains at least any one of Fe, Ti, and Si and Sn.Type: ApplicationFiled: May 22, 2012Publication date: June 25, 2015Applicant: HITACHI, LTD.Inventors: Akinori Nishide, Yosuke Kurosaki, Jun Hayakawa, Shin Yabuuchi, Hiroyuki Yamamoto
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Publication number: 20140345663Abstract: Provided are a thermoelectric device and a thermoelectric module having larger conversion efficiency than conventional ones. A thermoelectric device of the present invention includes a Heusler alloy material, and a pair of electrodes that takes out electromotive force according to a temperature gradient caused in the Heusler alloy material. Further, the dimensions of the Heusler alloy material are defined such that the conversion efficiency of the module is maximized according to an environment having a temperature difference, under which the Heusler alloy material is used.Type: ApplicationFiled: December 21, 2011Publication date: November 27, 2014Inventors: Jun Hayakawa, Shin Yabuuchi, Yosuke Kurosaki, Akinori Nishide, Masakuni Okamoto
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Publication number: 20120160288Abstract: A thermoelectric conversion device includes a Heusler alloy film having a structure of B2 or L21 in notation of A2BC and a pair of electrodes on the Heusler alloy film to output an electromotive force generated by a thermal gradient in the Heusler alloy film. The thermoelectric conversion device further includes an electrode for applying an electric field or a voltage to the Heusler alloy film to increase and control an electric conductivity and a Seebeck coefficient S of the Heusler metal film. The device can control to increase an electric conductivity and Seebeck coefficient S by applying an electric field or a voltage through an insulation film to the Heusler alloy film. The device may have a shared connection to select one of outputs of a plurality of thermoelectric conversion devices arranged in a matrix or increase an electromotive force as an output.Type: ApplicationFiled: December 28, 2011Publication date: June 28, 2012Inventors: Jun HAYAKAWA, Shin Yabuuchi, Masakuni Okamoto, Yosuke Kurosaki, Akinori Nishide