公开(公告)号：US20250093565A1

公开(公告)日：2025-03-20

申请号：US18292296

申请日：2022-07-01

Applicant: TOHOKU UNIVERSITY ,  C&A Corporation

Inventor： Akira YOSHIKAWA ,  Kei KAMADA ,  Ryuga YAJIMA ,  Rikito MIRAKAMI ,  Yasuhiro SHOJI

IPC: F21V8/00 ,  G01T1/20 ,  G02B1/04

Abstract: A core material (102) is contained in a cylindrical container (101) (first step). The container (101) is formed from a thermoplastic cladding material. The container (101) can be formed from a heat resistant glass such as a borosilicate glass, for example. The core material (102) is a halide having a lower melting point than the cladding material. Next, the container (101) containing the core material (102) is heated using a heater (151) and stretched, thereby forming an optical fiber emitter (105) comprising a core (103) formed from a halide crystal, and a cladding (104) formed from the cladding material.

公开(公告)号：US20210277504A1

公开(公告)日：2021-09-09

申请号：US16625385

申请日：2018-06-27

Applicant: C&A Corporation ,  TOHOKU UNIVERSITY

Inventor： Akira YOSHIKAWA ,  Rikito MURAKAMI ,  Yui YOKOTA ,  Takayuki NIHEI ,  Kei KAMADA ,  Yasuhiro SHOJI ,  Shunsuke KUROSAWA ,  Akihiro YAMAJI ,  Yuji OHASHI

IPC: C22C28/00 ,  B22D11/00 ,  B22D11/117

Abstract: A metal member according to this invention is composed of polycrystals of a metal made of ruthenium or an alloy containing ruthenium at a maximum ratio. The aspect ratio of a crystal grain of the polycrystalline metal member is 1.5 or more. A plurality of crystal grains forming the metal member are arranged with their major axes being pointed in the same direction, and the number of crystal grains in a section in the major axis direction of the crystal grains is 120 or less per 1 mm2.

公开(公告)号：US20250129450A1

公开(公告)日：2025-04-24

申请号：US18966564

申请日：2024-12-03

Applicant: TOHOKU UNIVERSITY ,  C&A Corporation

Inventor： Rikito MURAKAMI ,  Akira YOSHIKAWA ,  Kei KAMADA ,  Hiroaki YAMAGUCHI ,  Shiika ITOI ,  Yasuhiro SHOJI

IPC: C22C5/04 ,  H05B3/12 ,  H05B3/64

Abstract: This composition includes a Ru—Mo—W alloy having, in atomic %, a chemical composition including Mo: greater than 0% and 49% or less and W: greater than 0% and 45% or less, and the total content of Mo and W in the Ru—Mo—W alloy is greater than 30% and less than 50%.

公开(公告)号：US20180100101A1

公开(公告)日：2018-04-12

申请号：US15566199

申请日：2016-05-27

Applicant: TOHOKU UNIVERSITY ,  C&A CORPORATION

Inventor： Shunsuke KUROSAWA ,  Akira YOSHIKAWA ,  Kei KAMADA ,  Yuui YOKOTA ,  Yuji OHASHI ,  Takahiko HORIAI ,  Yasuhiro SHOJI ,  Rikito MURAKAMI

IPC: C09K11/77 ,  H01L27/146 ,  C01F17/00 ,  G01T1/202 ,  G01T1/20 ,  C30B29/22 ,  C30B15/00

CPC classification number: C09K11/7774 ,  C01F17/0043 ,  C09K11/00 ,  C30B15/00 ,  C30B29/22 ,  G01T1/161 ,  G01T1/20 ,  G01T1/2006 ,  G01T1/202 ,  G01T1/2023 ,  H01L27/14663 ,  H01L31/0232

Abstract: A crystal material that is represented by a general formula (1): (RExA1-x-y-sByM′s)2+α(Si1-t′M″t)2+βO7+γ (1), the crystal material having a pyrochlore type structure, being a nonstoichiometric composition, and being a congruent melting composition, wherein in Formula (1), A contains at least one or more selected from Gd, Y, La, Sc, Yb, and Lu; B contains at least one or more selected from La, Gd, Yb, Lu, Y, and Sc; 0.1≤y

公开(公告)号：US10174247B2

公开(公告)日：2019-01-08

申请号：US15305563

申请日：2015-04-30

Applicant: TOHOKU TECHNO ARCH CO., LTD. ,  C & A Corporation

Inventor： Kei Kamada ,  Akira Yoshikawa ,  Yuui Yokota ,  Shunsuke Kurosawa ,  Yasuhiro Shoji

IPC: C09K11/77 ,  C09K11/00 ,  G01T1/20 ,  G01T3/06 ,  H01L31/08 ,  G01T1/202 ,  C30B15/00 ,  C30B29/28

Abstract: An illuminant has a short fluorescence lifetime, high transparency, and high light yield and a radiation detector uses the illuminant. The illuminant is appropriate for a radiation detector for detecting gamma-rays, X-rays, α-rays, and neutron rays, and has high radiation resistance, a short fluorescence decay time and high emission intensity. The illuminant has a garnet structure using emission from the 4f5d level of Ce3+, and includes a garnet illuminant prepared by co-doping of at least one type of monovalent or divalent cation at a molar ratio of 7000 ppm or less with respect to all cations, to an illuminant having a garnet structure represented by general formula CexRE3−xM5+yO12+3y/2 (where 0.0001≤x≤0.3, 0≤y≤0.5 or 0≤y≤−0.5, M is one type or two or more types selected from Al, Lu, Ga, and Sc, and RE is one type or two or more types selected from La, Pr, Gd, Tb, Yb, Y, and Lu).

公开(公告)号：US10011770B2

公开(公告)日：2018-07-03

申请号：US15566199

申请日：2016-05-27

Applicant: TOHOKU UNIVERSITY ,  C&A CORPORATION

Inventor： Shunsuke Kurosawa ,  Akira Yoshikawa ,  Kei Kamada ,  Yuui Yokota ,  Yuji Ohashi ,  Takahiko Horiai ,  Yasuhiro Shoji ,  Rikito Murakami

IPC: C30B15/00 ,  C09K11/77 ,  H01L27/146 ,  C01F17/00 ,  G01T1/20 ,  C30B29/22 ,  G01T1/202

CPC classification number: C09K11/7774 ,  C01F17/0043 ,  C09K11/00 ,  C30B15/00 ,  C30B29/22 ,  G01T1/161 ,  G01T1/20 ,  G01T1/2006 ,  G01T1/202 ,  G01T1/2023 ,  H01L27/14663 ,  H01L31/0232

Abstract: A crystal material that is represented by a general formula (1): (RExA1-x-y-sByM′s)2+α(Si1-t,M″t)2+βO7+γ (1), the crystal material having a pyrochlore type structure, being a nonstoichiometric composition, and being a congruent melting composition, wherein in Formula (1), A contains at least one or more selected from Gd, Y, La, Sc, Yb, and Lu; B contains at least one or more selected from La, Gd, Yb, Lu, Y, and Sc; 0.1≤y

公开(公告)号：US20170044433A1

公开(公告)日：2017-02-16

申请号：US15305563

申请日：2015-04-30

Applicant: TOHOKU TECHNO ARCH CO., LTD. ,  C & A CORPORATION

Inventor： Kei KAMADA ,  Akira YOSHIKAWA ,  Yuui YOKOTA ,  Shunsuke KUROSAWA ,  Yasuhiro SHOJI

IPC: C09K11/77 ,  G01T3/06 ,  H01L31/08 ,  G01T1/202

CPC classification number: C09K11/7774 ,  C09K11/00 ,  C09K11/77 ,  C30B15/00 ,  C30B29/28 ,  G01T1/20 ,  G01T1/202 ,  G01T3/06 ,  H01L31/08 ,  H01L31/085

Abstract: An illuminant has a short fluorescence lifetime, high transparency, and high light yield and a radiation detector uses the illuminant. The illuminant is appropriate for a radiation detector for detecting gamma-rays, X-rays, α-rays, and neutron rays, and has high radiation resistance, a short fluorescence decay time and high emission intensity. The illuminant has a garnet structure using emission from the 4f5d level of Ce3+, and includes a garnet illuminant prepared by co-doping of at least one type of monovalent or divalent cation at a molar ratio of 7000 ppm or less with respect to all cations, to an illuminant having a garnet structure represented by general formula CexRE3−xM5+yO12+3y/2 (where 0.0001≦x≦0.3, 0≦y≦0.5 or 0≦y≦−0.5, M is one type or two or more types selected from Al, Lu, Ga, and Sc, and RE is one type or two or more types selected from La, Pr, Gd, Tb, Yb, Y, and Lu).

Abstract translation: 发光体具有短的荧光寿命，高透明度和高光产量，并且辐射探测器使用光源。 该光源适用于用于检测伽马射线，X射线，α射线和中子射线的辐射检测器，具有高的辐射电阻，短的荧光衰减时间和高的发射强度。 所述发光体具有使用来自CeF 3+的4f 5d电平的发射的石榴石结构，并且包括通过以相对于所有阳离子的摩尔比为7000ppm以下的摩尔比共掺杂至少一种一价或二价阳离子而制备的石榴石光源， 具有由通式CexRE3-xM5 + yO12 + 3y / 2表示的石榴石结构的发光体（其中，0.0001≤x≤0.3,0≤y≤0.5或0≤y≤0.5，M为1种或2种以上 选自Al，Lu，Ga和Sc，RE是选自La，Pr，Gd，Tb，Yb，Y和Lu中的一种或两种以上。