Patents by Inventor Kenji Essaki

Kenji Essaki 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).

  • Patent number: 11355416
    Abstract: A structure includes: a ? silicon nitride crystal phase; and a Y2MgSi2O5N crystal phase. The structure gives a X-ray diffraction pattern by a ?-2? method, the pattern having a ratio of a peak intensity of a (22-1) plane of the Y2MgSi2O5N crystal phase to a peak intensity of a (200) plane of the ? silicon nitride crystal phase, the peak intensity of the (200) plane being determined at a position of 2?=27.0±1°, the peak intensity of the (22-1) plane being determined at a position of 2?=30.3±1°, and the ratio being 0.001 or more and 0.01 or less.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: June 7, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi Fukuda, Koichi Harada, Yasushi Hattori, Maki Yonetsu, Kenji Essaki, Keiko Albessard, Yasuhiro Goto
  • Patent number: 11300693
    Abstract: The embodiments provide a radiation detection material emitting fluorescence with high intensity and short lifetime, and also provide a radiation detection device. The polycrystalline radiation detection material of the embodiment is represented by the following formula (1) TlM1-x-yRxX3-z??(1). In the formula, M is at least one metal element selected form the group consisting of Ca, Sr, Ba and Mg; R is at least one luminescence center element selected form the group consisting of Ce, Pr, Yb and Nd; X is at least one halogen element selected form the group consisting of Cl, Br and F; and x, y and z are numbers satisfying the conditions of 0?x?0.5, ?0.1?y?0.1, and ?0.5?z?1, respectively.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: April 12, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi Fukuda, Keiko Albessard, Kenji Essaki
  • Publication number: 20210296205
    Abstract: A structure includes: a ? silicon nitride crystal phase; and a Y2MgSi2O5N crystal phase. The structure gives a X-ray diffraction pattern by a ?-2? method, the pattern having a ratio of a peak intensity of a (22-1) plane of the Y2MgSi2O5N crystal phase to a peak intensity of a (200) plane of the ? silicon nitride crystal phase, the peak intensity of the (200) plane being determined at a position of 2?=27.0±1°, the peak intensity of the (22-1) plane being determined at a position of 2?=30.3±1°, and the ratio being 0.001 or more and 0.01 or less.
    Type: Application
    Filed: August 31, 2020
    Publication date: September 23, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi FUKUDA, Koichi HARADA, Yasushi HATTORI, Maki YONETSU, Kenji ESSAKI, Keiko ALBESSARD, Yasuhiro GOTO
  • Publication number: 20210199818
    Abstract: The embodiments provide a radiation detection material emitting fluorescence with high intensity and short lifetime, and also provide a radiation detection device. The polycrystalline radiation detection material of the embodiment is represented by the following formula (1) TlM1-x-yRxX3-z??(1). In the formula, M is at least one metal element selected form the group consisting of Ca, Sr, Ba and Mg; R is at least one luminescence center element selected form the group consisting of Ce, Pr, Yb and Nd; X is at least one halogen element selected form the group consisting of Cl, Br and F; and x, y and z are numbers satisfying the conditions of 0?x?0.5, ?0.1?y?0.1, and ?0.5?z?1, respectively.
    Type: Application
    Filed: September 8, 2020
    Publication date: July 1, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi FUKUDA, Keiko ALBESSARD, Kenji ESSAKI
  • Publication number: 20210166989
    Abstract: According to one embodiment, a structure according to the embodiment includes a ? type silicon nitride type crystal phase and a Y2Si3O3N4 type crystal phase. In an X-ray diffraction pattern according to a ?-2? method of the structure, a ratio of a second peak intensity being maximum and appearing at 2?=31.93±0.1° with respect to a first peak intensity being maximum and appearing at 2?=27.03±0.1° is 0.005 or more and 0.20 or less.
    Type: Application
    Filed: February 16, 2021
    Publication date: June 3, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi FUKUDA, Koichi HARADA, Kenji ESSAKI, Yasushi HATTORI, Yasuhiro GOTO, Keiko ALBESSARD, Maki YONETSU
  • Publication number: 20210161007
    Abstract: A structure according to the embodiment includes a first crystal grain, a second crystal grain, and a first region. The first crystal grain includes silicon nitride. The second crystal grain includes a first element selected from a first group consisting of scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, aluminum, chromium, zirconium, magnesium, zinc, titanium, gallium, beryllium, calcium, strontium, barium, hafnium, vanadium, niobium, tantalum, tungsten, iron, cobalt, nickel, and copper, and oxygen. The first region includes an oxide of the first element.
    Type: Application
    Filed: February 5, 2021
    Publication date: May 27, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi HARADA, Yasuhiro GOTO, Kenji ESSAKI, Yasushi HATTORI, Maki YONETSU
  • Patent number: 10693128
    Abstract: An electrode for a nonaqueous electrolyte battery of the embodiment includes a current collector; and an active material layer which includes an active material and is formed on the current collector. The active material layer includes at least one of a silicon particle and a silicon oxide particle. The active material layer has a plurality of cracks extending in a thickness direction of the active material layer.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: June 23, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Tomokazu Morita, Takashi Kuboki
  • Patent number: 10615410
    Abstract: An active material of an embodiment for a nonaqueous electrolyte battery includes a complex. The complex includes a covering material including an M-O—C mixed body; and particles including at least one element of M. The particles are included in the covering material. The M includes at least one element selected from the group consisting of; Si, Sn, Al, and Ti. The particles including the at least one element of M include the at least one element of M or an alloy including the at least one element of M. The M-O—C mixed body includes at least three elements of M, O, and C. The M-O—C mixed body includes a point at which the following conditional expressions: 0.6?M/O?5 (molar ratio) and 0.002?M/C?0.1 (molar ratio) are simultaneously satisfied. The M-O—C mixed body includes the at least three elements of M, O, and C in a region excluding the particles including the at least one element of M when elementary composition analysis of the complex is performed by TEM-EDX with a beam diameter of 1 nm.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: April 7, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenji Essaki, Tomokazu Morita, Takayuki Fukasawa, Takashi Kuboki
  • Patent number: 10511026
    Abstract: A negative electrode active material of an embodiment for a nonaqueous electrolyte battery includes silicon or silicon oxide including silicon inside, a carbonaceous substance containing the silicon or the silicon oxide including silicon inside, and a phase including a silicate compound and a conductive assistant, the phase being interposed between the silicon or the silicon oxide including silicon inside and the carbonaceous substance. The silicate compound is a complexed oxide including an oxide including at least one element selected from the group consisting of; an alkaline earth element, a transition metal element, and a rare-earth element and a silicon oxide.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: December 17, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Tomokazu Morita, Takashi Kuboki
  • Patent number: 10468669
    Abstract: An active material for a nonaqueous electrolyte battery according to the embodiment is a composite including at least: a carbonaceous substance; and silicon-containing particles dispersed in the carbonaceous substance, the silicon-containing particles including at least one of silicon, a silicon alloy and a silicon oxide, wherein in an argon ion laser Raman spectrum, the half-width (?G) of a peak having a maximum intensity I1 in the range of 1575 cm?1 or more and 1625 cm?1 or less is 100 cm?1 or more and 150 cm?1 or less, and the intensity ratio of a peak having a maximum intensity I2 in the range of 500 cm?1 or more and 550 cm?1 or less to the peak having the maximum intensity I1 in the range of 1575 cm?1 or more and 1625 cm?1 or less (I2/I1) is 0.25 or more and 0.50 or less.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: November 5, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenji Essaki, Takayuki Fukasawa, Miho Muramatsu, Tomokazu Morita, Takashi Kuboki, Yumiko Kita
  • Patent number: 10381649
    Abstract: An electrode material for a nonaqueous electrolyte battery that includes a composite particle that contains a silicon dioxide particle having an average primary particle size of D1, a silicon particle having an average primary particle size of D2, and a carbon material, where D1 is 5 nm or more and 80 nm or less and the ratio D2/D1 is 0.3 or more and 8 or less.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: August 13, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Takashi Kuboki, Shinsuke Matsuno, Tomokazu Morita
  • Patent number: 10326129
    Abstract: The active material for a nonaqueous electrolyte secondary battery of the present embodiment includes a core particle and a carbon layer. The core particle is formed of silicon particles having a twinned crystal in part of a surface. The carbon layer coats the core particle.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: June 18, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Tomokazu Morita, Takashi Kuboki, Yasuhiro Goto
  • Patent number: 10005078
    Abstract: A fuel synthesis catalyst of an embodiment for hydrogenating a gas includes at least one selected from the group consisting of; carbon dioxide and carbon monoxide, the catalyst comprising, an oxide base material containing at least one oxide selected from the group consisting of; Al2O3, MgO, TiO2, and SiO2, first metal particles containing at least one metal selected from the group consisting of; Ni, Co, Fe, and Cu and brought into contact with the oxide base material, and a porous oxide layer containing at least one selected from the group consisting of; CeO2, ZrO2, TiO2, and SiO2 and having an interface with each of the first metal particles and the oxide base material.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: June 26, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Shinsuke Matsuno, Takashi Kuboki
  • Patent number: 9975099
    Abstract: A fuel synthesis catalyst of an embodiment for hydrogenating a gas includes at least one selected from the group consisting of; carbon dioxide and carbon monoxide, the catalyst comprising, a base material containing at least one oxide selected from the group consisting of; Al2O3, MgO, TiO2, and SiO2, first metals containing at least one metal selected from the group consisting of; Ni, Co, Fe, and Cu and brought into contact with the base material, and a first oxide containing at least one selected from the group consisting of; CeO2, ZrO2, TiO2, and SiO2 and having an interface with each of the first metals and the base material. The first metals exist on an outer surface of the base material, and on a surface of the base material in fine pores having opening ends on the outer surface of the base material and inside the base material. The first metals and the first oxide exist in the fine pores. The first metals have interfaces with the base material in the fine pores.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: May 22, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Shinsuke Matsuno, Takashi Kuboki, Yasuhiro Goto, Seiichi Suenaga
  • Patent number: 9859552
    Abstract: An electrode material for nonaqueous electrolyte secondary battery of an embodiment includes a silicon nanoparticle, and a coating layer coating the silicon nanoparticle. The coating layer includes an amorphous silicon oxide and a silicon carbide phase. At least a part of the silicon carbide phase exists on a surface of the silicon nanoparticle.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: January 2, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Tomokazu Morita, Takashi Kuboki, Mitsuhiro Oki, Yasuhiro Goto
  • Publication number: 20170266636
    Abstract: A fuel synthesis catalyst of an embodiment for hydrogenating a gas includes at least one selected from the group consisting of; carbon dioxide and carbon monoxide, the catalyst comprising, a base material containing at least one oxide selected from the group consisting of; Al2O3, MgO, TiO2, and SiO2, first metals containing at least one metal selected from the group consisting of; Ni, Co, Fe, and Cu and brought into contact with the base material, and a first oxide containing at least one selected from the group consisting of; CeO2, ZrO2, TiO2, and SiO2 and having an interface with each of the first metals and the base material. The first metals exist on an outer surface of the base material, and on a surface of the base material in fine pores having opening ends on the outer surface of the base material and inside the base material. The first metals and the first oxide exist in the fine pores. The first metals have interfaces with the base material in the fine pores.
    Type: Application
    Filed: March 13, 2017
    Publication date: September 21, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takayuki FUKASAWA, Kenji Essaki, Shinsuke Matsuno, Takashi Kuboki, Yasuhiro Goto, Seiichi SUENAGA
  • Publication number: 20170271680
    Abstract: An electrode material for a nonaqueous electrolyte battery of the present embodiment includes a composite particle, the composite particle contains a silicon dioxide particle having an average primary particle size of D1, a silicon particle having an average primary particle size of D2, and a carbon material. D1 is 5 nm or more and 80 nm or less. The ratio D2/D1 of D2 to D1 is 0.3 or more and 8 or less.
    Type: Application
    Filed: September 8, 2016
    Publication date: September 21, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Takashi KUBOKI, Shinsuke MATSUNO, Tomokazu MORITA
  • Publication number: 20170267932
    Abstract: A fuel synthesis catalyst of an embodiment for hydrogenating a gas includes at least one selected from the group consisting of; carbon dioxide and carbon monoxide, the catalyst comprising, an oxide base material containing at least one oxide selected from the group consisting of; Al2O3, MgO, TiO2, and SiO2, first metal particles containing at least one metal selected from the group consisting of; Ni, Co, Fe, and Cu and brought into contact with the oxide base material, and a porous oxide layer containing at least one selected from the group consisting of; CeO2, ZrO2, TiO2, and SiO2 and having an interface with each of the first metal particles and the oxide base material.
    Type: Application
    Filed: September 2, 2016
    Publication date: September 21, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Shinsuke MATSUNO, Takashi KUBOKI
  • Publication number: 20170092942
    Abstract: The active material for a nonaqueous electrolyte secondary battery of the present embodiment includes a core particle and a carbon layer. The core particle is formed of silicon particles having a twinned crystal in part of a surface. The carbon layer coats the core particle.
    Type: Application
    Filed: March 17, 2014
    Publication date: March 30, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Tomokazu MORITA, Takashi KUBOKI, Yasuhiro GOTO
  • Publication number: 20170077498
    Abstract: An electrode for a nonaqueous electrolyte battery of the embodiment includes a current collector; and an active material layer which includes an active material and is formed on the current collector. The active material layer includes at least one of a silicon particle and a silicon oxide particle. The active material layer has a plurality of cracks extending in a thickness direction of the active material layer.
    Type: Application
    Filed: September 8, 2016
    Publication date: March 16, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Tomokazu MORITA, Takashi KUBOKI