公开(公告)号：US20240194383A1

公开(公告)日：2024-06-13

申请号：US18286240

申请日：2022-02-18

Applicant: Hitachi, Ltd.

Inventor： Matahiro KOMURO ,  Tomohiro TABATA ,  Shinya TAMURA ,  Yusuke ASARI ,  Shohei TERADA

IPC: H01F1/20 ,  C21D1/18 ,  C21D1/76 ,  C21D3/08 ,  C21D6/00 ,  C21D6/04 ,  C21D9/46 ,  C22C38/00 ,  C22C38/10

CPC classification number: H01F1/20 ,  C21D1/18 ,  C21D1/76 ,  C21D3/08 ,  C21D6/007 ,  C21D6/04 ,  C21D9/46 ,  C22C38/001 ,  C22C38/10 ,  C21D2211/008 ,  C22C2202/02

Abstract: A soft magnetic iron alloy plate having saturation magnetic flux density higher than that of an electromagnetic pure iron plate without an excessive increase in an iron loss, a method for manufacturing the soft magnetic iron alloy plate, and an iron core and a rotating electric machine using the soft magnetic iron alloy plate are provided. A soft magnetic iron alloy plate according to the present invention includes chemical composition containing 2 to 10 at. % of N, 0 to 30 at. % of Co, 0 to 1.2 at. % of V, and a remaining portion including Fe and impurities, and in a thickness direction of the soft magnetic iron alloy plate, an outer nitrogen concentration transition region where N concentration on a main surface is 1 to 4 at. % and N concentration increases toward the inner side from the main surface, a high nitrogen concentration region where maximum N concentration is higher than N concentration of the main surface and less than 11 at. %, and a variation range of N concentration is within 1 at. %, and an inner nitrogen concentration transition region where N concentration decreases toward the inner side from the high nitrogen concentration region and minimum N concentration is lower than N concentration in the high nitrogen concentration region and is 1 at. % or more.

公开(公告)号：US20240136096A1

公开(公告)日：2024-04-25

申请号：US18278477

申请日：2021-09-27

Applicant: Hitachi, Ltd.

Inventor： Tomohiro TABATA ,  Matahiro KOMURO ,  Yusuke ASARI ,  Shinya TAMURA ,  Shohei TERADA

IPC: H01F1/16 ,  C21D9/46 ,  C22C38/00 ,  C22C38/10 ,  C22C38/12

CPC classification number: H01F1/16 ,  C21D9/46 ,  C22C38/001 ,  C22C38/10 ,  C22C38/12 ,  C21D2211/005 ,  C22C2202/02

Abstract: A soft magnetic iron alloy sheet has a saturation magnetic flux density comparable to that of Permendur, with the same iron loss as electromagnetic pure iron, and a lower cost than Permendur. The soft magnetic iron alloy sheet includes, as a chemical composition, 30 at % or less of Co, 0.1 at % or more and 11 at % or less of N, and 1.2 at % or less of vanadium, with the remainder being Fe and impurities. In a thickness direction of the soft magnetic iron alloy sheet, a surface layer region has an average nitrogen concentration of 1 at % or more and 15 at % or less and an internal region has a lower average nitrogen concentration than the surface layer region. In the surface layer region, a thickness is 1% or more and 30% or less from both main surfaces of the sheet and iron-nitride martensite having a tetragonal structure is formed.

公开(公告)号：US20150380765A1

公开(公告)日：2015-12-31

申请号：US14764776

申请日：2013-03-15

Applicant: HITACHI, LTD.

Inventor： Tadashi FUJIEDA ,  Jun KAWAJI ,  Takuya AOYAGI ,  Yusuke ASARI ,  Takashi NAITO ,  Hirotsugu TAKIZAWA ,  Yamato HAYAHI ,  Yuya NAKATANI

IPC: H01M10/0562 ,  H01M10/0525

CPC classification number: H01M10/0562 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/054 ,  H01M2300/0068 ,  H01M2300/0071

Abstract: To provide both resistance to reduction and high ion conductivity, a solid electrolyte includes a crystal having a structure expressed as A4-2x-y-zBxSn3-yMyO8-zNz (1≦4−2x−y−z

Abstract translation: 为了提供抗还原性和高离子传导性，固体电解质包括具有表示为A4-2x-y-zBxSn3-yMyO8-zNz（1＆nlE; 4-2x-y-z <4，A：Li， Na，B：Mg，Ca，Sr，Ba，M：V，Nb，Ta，N：F，Cl）或具有表示为A2-1.5x-0.5y-0.5zBxSn3-yMyO8-zNz 0.5＆nlE; 2-1.5x-0.5y-0.5z <2，A：Mg，Ca，B：Sc，Y，Sb，Si，M：V，Nb，Ta，N：F，Cl）。