Patents by Inventor Takashi Terashima

Takashi Terashima 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: 10435791
    Abstract: Provided is a treatment solution for chromium-free tension coating that can simultaneously achieve excellent moisture absorption resistance and a high iron loss reduction effect obtained by imparting sufficient tension, by using an inexpensive Ti source instead of expensive Ti chelate. The treatment solution for chromium-free tension coating contains: one or more of phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn; colloidal silica in an amount of 50 parts by mass to 120 parts by mass per 100 parts by mass of the phosphate in terms of solid content of SiO2; Ti source in an amount of 30 parts by mass to 50 parts by mass per 100 parts by mass of the phosphate in terms of solid content of TiO2; and H3PO4, and the number of moles of metallic elements in the phosphate and of phosphorus in the treatment solution satisfy: 0.20?([Mg]+[Ca]+[Ba]+[Sr]+[Zn]+[Mn]+1.5[Al])/[P]?0.45??(1).
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: October 8, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Takashi Terashima, Makoto Watanabe, Masanori Uesaka, Ryuichi Suehiro, Toshito Takamiya
  • Publication number: 20190292623
    Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.
    Type: Application
    Filed: June 5, 2019
    Publication date: September 26, 2019
    Applicant: JFE STEEL CORPORATION
    Inventors: Masayasu NAGOSHI, Tomohiro MATSUSHIMA, Makoto WATANABE, Shigehiro TAKAJO, Toshito TAKAMIYA, Masanori UESAKA, Takashi TERASHIMA
  • Patent number: 10395807
    Abstract: There is provided a grain-oriented electrical steel sheet stably having excellent magnetic characteristics and coating adhesion even when a rapid heating is conducted in a primary recrystallization annealing (decarburization annealing). Concretely, it is a grain-oriented electrical steel sheet provided on its sheet surface with a tension-applying type insulation coating constituted with a coating layer A formed on a steel sheet side and mainly composed of an oxide and a coating layer B formed on a surface side and mainly composed of glass, characterized in that a ratio R (?B/?A) of a tension ?B of the coating layer B on the surface side applied to the steel sheet to a tension ?A of the coating layer on the steel sheet side A applied to the steel sheet is within a range of 1.20-4.0.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: August 27, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Takashi Terashima, Makoto Watanabe, Masanori Uesaka, Ryuichi Suehiro, Toshito Takamiya
  • Publication number: 20190256985
    Abstract: Provided are: an oriented electromagnetic steel sheet with outstanding coating adhesion and magnetic properties after stress relief annealing; and a method for manufacturing the oriented electromagnetic steel sheet. The oriented electromagnetic steel sheet comprises: a steel sheet; a non-oxide ceramic coating disposed on the steel sheet and containing a non-oxide; and an insulating tensile coating disposed on the non-oxide ceramic coating and containing an oxide. The thickness of the non-oxide ceramic coating is 0.020-0.400 ?m. The thickness of the insulating tensile coating is at least 1.0 ?m. The chromium content on the steel plate side of the non-oxide ceramic coating is less than 25 atomic %, and the chromium content on the insulating tensile coating side of the non-oxide ceramic coating is at least 25 atomic %.
    Type: Application
    Filed: October 17, 2017
    Publication date: August 22, 2019
    Applicant: JFE Steel Corporation
    Inventors: Takumi Umada, Shigehiro Takajo, Takashi Terashima, Minoru Takashima, Yasuyuki Hayakawa
  • Patent number: 10377634
    Abstract: A carbon material and a material for a battery electrode which is suitable for use as an electrode material for an aqueous-electrolyte secondary battery, which material includes optical structures having a specific shape, and in which material the ratio IG/ID (R value) between the peak intensity (ID) of a peak in a range of 1300 to 1400 cm?1 and the peak intensity (IG) of a peak in a range of 1580 to 1620 cm?1 measured by Raman spectroscopy spectra when particles of the carbon material are measured with Raman microspectrometer is 0.38 or more and 1.2 or less and the average interplanar spacing d002 of plane (002) by the X-ray diffraction method is 0.335 nm or more and 0.338 nm or less; and a secondary battery excellent in charge/discharge cycle characteristics and large current load characteristics.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: August 13, 2019
    Assignee: SHOWA DENKO K.K.
    Inventors: Chiaki Sotowa, Takashi Terashima, Yasuaki Wakizaka
  • Patent number: 10377633
    Abstract: A non-flaky carbon material having specific optical structures, wherein the ratio between the peak intensity I110 of (110) plane and the peak intensity I004 of (004) plane of a graphite crystal determined by the powder XRD measurement, I110/I004, is 0.10 or more and 0.35 or less; an average circularity is 0.80 or more and 0.95 or less; d002 is 0.337 nm or less; and the total pore volume of pores having a diameter of 0.4 ?m or less measured by the nitrogen gas adsorption method is 25.0 ?l/g or more and 40.0 ?l/g or less. Also disclosed is a method for producing the carbon material, a carbon material for a battery electrode, a paste for an electrode incorporating the carbon material for a battery electrode, an electrode for a lithium battery incorporating a formed body of the paste for an electrode, a lithium-ion secondary battery including the electrode and a method for producing the electrode.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: August 13, 2019
    Assignee: SHOWA DENKO K.K.
    Inventors: Naoto Kawaguchi, Takashi Terashima, Yoshikuni Sato, Yasuaki Wakizaka
  • Publication number: 20190226093
    Abstract: Provided are coated metal, the metal having improved properties due to a novel coating, a coating-forming treatment solution for forming the novel coating, and a method for producing the coated metal that has the novel coating. The coated metal includes metal and a coating formed on the metal. The coating includes Si, P, and O, and at least one selected from the group consisting of Mg, Ca, Ba, Sr, Zn, Al, and Mn. The coating includes a compound having a NASICON-type crystal structure represented by the general formula MIMIV2(MVO4)3.
    Type: Application
    Filed: August 21, 2017
    Publication date: July 25, 2019
    Applicant: JFE Steel Corporation
    Inventors: Takashi Terashima, Makoto Watanabe, Toshito Takamiya
  • Patent number: 10294543
    Abstract: A method for producing a grain-oriented electrical steel sheet by subjecting a slab of an inhibitor-less ingredient system containing C: 0.002-0.10 mass %, Si: 2.5-6.0 mass %, Mn: 0.010-0.8 mass % and extremely decreased Al, N, Se and S to hot rolling, hot band annealing, cold rolling, decarburization annealing, application of an annealing separator and finish annealing, when a certain temperature within range of 700-800° C. in a heating process of decarburization annealing is T1 and a certain temperature as a soaking temperature within a range of 820-900° C. is T2, a heating rate R1 between 500° C. and T1 is set to not less than 100° C./s and heating rate R2 between T1 and T2 is set to not more than 15° C./s, whereby grain-oriented electrical steel sheet having excellent iron loss property and coating peeling resistance is obtained in the inhibitor-less ingredient system while ensuring decarburization property even when rapid heating is performed during decarburization annealing.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: May 21, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Ryuichi Suehiro, Takashi Terashima, Makoto Watanabe, Toshito Takamiya, Takeshi Imamura
  • Patent number: 10294544
    Abstract: In a method for producing a grain-oriented electrical steel sheet by subjecting a slab containing C: 0.002-0.10 mass %, Si: 2.5-6.0 mass %, Mn: 0.01-0.8 mass % and further containing Al and N, or S and/or Se, or Al, N, S and/or Se as inhibitor ingredients to hot rolling, hot band annealing, cold rolling, decarburization annealing, application of an annealing separator and finish annealing, when a certain temperature within a range of 700-800° C. in a heating process of the decarburization annealing is T1 and a certain temperature as a soaking temperature within a range of 820-900° C. is T2, a heating rate R1 between 500° C. and T1 is set to not less than 80° C./s and a heating rate R2 between T1 and T2 is set to not more than 15° C./s, whereby a grain-oriented electrical steel sheet having excellent magnetic properties and peeling resistance of forsterite coating is obtained while ensuring decarburization property.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: May 21, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Ryuichi Suehiro, Takashi Terashima, Makoto Watanabe, Toshito Takamiya
  • Publication number: 20190119773
    Abstract: Provided is a method for nitriding a grain-oriented electrical steel sheet which is very useful in obtaining excellent magnetic properties with no variation, that enables generating glow discharge between positive electrodes and negative electrodes disposed in a nitriding zone and irradiating the generated plasma to a strip to perform appropriate nitriding.
    Type: Application
    Filed: December 17, 2018
    Publication date: April 25, 2019
    Applicant: JFE STEEL CORPORATION
    Inventors: Hiroshi MATSUDA, Hideyuki TAKAHASHI, Hiroi YAMAGUCHI, Yasuyuki HAYAKAWA, Yukihiro SHINGAKI, Takashi TERASHIMA
  • Publication number: 20190062162
    Abstract: A carbon material and a material for a battery electrode which is suitable for use as an electrode material for an aqueous-electrolyte secondary battery, which material includes optical structures having a specific shape, and in which material the ratio IG/ID (R value) between the peak intensity (ID) of a peak in a range of 1300 to 1400 cm?1 and the peak intensity (IG) of a peak in a range of 1580 to 1620 cm?1 measured by Raman spectroscopy spectra when particles of the carbon material are measured with Raman microspectrometer is 0.38 or more and 1.2 or less and the average interplanar spacing d002 of plane (002) by the X-ray diffraction method is 0.335 nm or more and 0.338 nm or less; and a secondary battery excellent in charge/discharge cycle characteristics and large current load characteristics.
    Type: Application
    Filed: October 31, 2018
    Publication date: February 28, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Chiaki SOTOWA, Takashi TERASHIMA, Yasuaki WAKIZAKA
  • Patent number: 10214793
    Abstract: Provided is a method for nitriding a grain-oriented electrical steel sheet which is very useful in obtaining excellent magnetic properties with no variation by immersing a strip in a molten salt bath after cold rolling and before secondary recrystallization annealing during a production process of a grain-oriented electrical steel sheet, to subject the strip to continuous nitriding to uniformly disperse inhibitor forming elements over the full length and full width of the strip.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: February 26, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Hiroshi Matsuda, Hideyuki Takahashi, Hiroi Yamaguchi, Yukihiro Shingaki, Yasuyuki Hayakawa, Takashi Terashima
  • Publication number: 20180371621
    Abstract: Provided is a treatment solution for chromium-free tension coating that can simultaneously achieve excellent moisture absorption resistance and a high iron loss reduction effect obtained by imparting sufficient tension, by using an inexpensive Ti source instead of expensive Ti chelate. The treatment solution for chromium-free tension coating contains: one or more of phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn; colloidal silica in an amount of 50 parts by mass to 120 parts by mass per 100 parts by mass of the phosphate in terms of solid content of SiO2; Ti source in an amount of 30 parts by mass to 50 parts by mass per 100 parts by mass of the phosphate in terms of solid content of TiO2; and H3PO4, and the number of moles of metallic elements in the phosphate and of phosphorus in the treatment solution satisfy: 0.20?([Mg]+[Ca]+[Ba]+[Sr]+[Zn]+[Mn]+1.5[Al])/[P]?0.45??(1).
    Type: Application
    Filed: August 30, 2018
    Publication date: December 27, 2018
    Applicant: JFE STEEL CORPORATION
    Inventors: Takashi TERASHIMA, Makoto WATANABE, Masanori UESAKA, Ryuichi SUEHIRO, Toshito TAKAMIYA
  • Publication number: 20180371620
    Abstract: Provided is a treatment solution for chromium-free tension coating that can simultaneously achieve excellent moisture absorption resistance and a high iron loss reduction effect obtained by imparting sufficient tension, by using an inexpensive Ti source instead of expensive Ti chelate. The treatment solution for chromium-free tension coating contains: one or more of phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn; colloidal silica in an amount of 50 parts by mass to 120 parts by mass per 100 parts by mass of the phosphate in terms of solid content of SiO2; Ti source in an amount of 30 parts by mass to 50 parts by mass per 100 parts by mass of the phosphate in terms of solid content of TiO2; and H3PO4, and the number of moles of metallic elements in the phosphate and of phosphorus in the treatment solution satisfy: 0.20?([Mg]+[Ca]+[Ba]+[Sr]+[Zn]+[Mn]+1.5[Al])/[P]?0.45??(1).
    Type: Application
    Filed: August 30, 2018
    Publication date: December 27, 2018
    Applicant: JFE STEEL CORPORATION
    Inventors: Takashi TERASHIMA, Makoto WATANABE, Masanori UESAKA, Ryuichi SUEHIRO, Toshito TAKAMIYA
  • Patent number: 10144646
    Abstract: The present invention provides a carbon material and a material for a battery electrode which is suitable for use as an electrode material for an aqueous-electrolyte secondary battery, which material comprises optical structures having a specific shape, and in which material the ratio IG/ID (R value) between the peak intensity (ID) of a peak in a range of 1300 to 1400 cm?1 and the peak intensity (IG) of a peak in a range of 1580 to 1620 cm?1 measured by Raman spectroscopy spectra when particles of the carbon material are measured with Raman microspectrometer is 0.38 or more and 1.2 or less and the average interplanar spacing d002 of plane (002) by the X-ray diffraction method is 0.335 nm or more and 0.338 nm or less; and a secondary battery excellent in charge/discharge cycle characteristics and large current load characteristics.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: December 4, 2018
    Assignee: SHOWA DENKO K.K.
    Inventors: Chiaki Sotowa, Takashi Terashima, Yasuaki Wakizaka
  • Patent number: 10087529
    Abstract: Provided is a treatment solution for chromium-free tension coating that can simultaneously achieve excellent moisture absorption resistance and a high iron loss reduction effect obtained by imparting sufficient tension, by using an inexpensive Ti source instead of expensive Ti chelate. The treatment solution for chromium-free tension coating contains: one or more of phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn; colloidal silica in an amount of 50 parts by mass to 120 parts by mass per 100 parts by mass of the phosphate in terms of solid content of SiO2; Ti source in an amount of 30 parts by mass to 50 parts by mass per 100 parts by mass of the phosphate in terms of solid content of TiO2; and H3PO4, and the number of moles of metallic elements in the phosphate and of phosphorus in the treatment solution satisfy: 0.20?([Mg]+[Ca]+[Ba]+[Sr]+[Zn]+[Mn]+1.5[Al])/[P]?0.45??(1).
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: October 2, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Takashi Terashima, Makoto Watanabe, Masanori Uesaka, Ryuichi Suehiro, Toshito Takamiya
  • Publication number: 20180251899
    Abstract: Provided is an insulative coating processing liquid with which an insulative coating can be obtained. The insulative coating processing liquid contains: at least one phosphate selected from the group consisting of Mg, Ca, Ba, Sr, Zn, Al, and Mn; and two or more types of colloidal silicas having different mean particle diameters, wherein the total contained amount of the colloidal silicas in terms of the SiO2 solid content is 50-120 parts by mass with respect to 100 parts by mass of the solid content of the phosphate, a mean particle diameter ratio expressed as ri+1/ri is not lower than 1.5 when the mean particle diameters of the colloidal silicas are represented in an ascending order, and a mass ratio expressed as wi+1/(wi+1+wi) is 0.30-0.90 when the masses of the colloidal silicas in terms of the SiO2 solid content are represented in an ascending order of the respective mean particle diameters.
    Type: Application
    Filed: September 1, 2016
    Publication date: September 6, 2018
    Applicant: JFE STEEL CORPORATION
    Inventors: Takashi Terashima, Ryuichi Suehiro, Makoto Watanabe, Toshito Takamiya
  • Patent number: 10066286
    Abstract: Provided is an apparatus for continuously nitriding a strip continuously being fed after cold rolling and before secondary recrystallization annealing in a production line of a grain-oriented electrical steel sheet, comprising: a nitriding zone for nitriding the strip; a cooling zone for cooling the strip; and an optional heating zone provided upstream of the nitriding zone for heating the strip, wherein, the nitriding zone is provided with glow discharge electrodes, and by plasma nitriding the strip by glow discharge with the glow discharge electrodes functioning as positive electrodes and the strip functioning as a negative electrode, inhibitor forming elements are uniformly dispersed over the full length and full width of the strip and a grain-oriented electrical steel sheet with excellent magnetic properties with no variation is obtained.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: September 4, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Hiroshi Matsuda, Hideyuki Takahashi, Hiroi Yamaguchi, Yasuyuki Hayakawa, Takashi Terashima, Yuiko Wakisaka
  • Publication number: 20180230565
    Abstract: A grain-oriented electrical steel sheet has a coating on a surface thereof. The coating has a composite elastic modulus of 60 GPa to 95 GPa and a film thickness of 1.0 ?m or more, and a tension applied to the grain-oriented electrical steel sheet by the coating is 6.0 MPa or more, and an amount of iron loss degradation between before and after roll reduction when the grain-oriented electrical steel sheet is roll-reduced at a linear pressure of 68.6 N/cm is 0.010 W/kg or less in W17/50.
    Type: Application
    Filed: September 21, 2016
    Publication date: August 16, 2018
    Applicant: JFE STEEL CORPORATION
    Inventors: Makoto WATANABE, Toshito TAKAMIYA, Ryuichi SUEHIRO, Takashi TERASHIMA
  • Publication number: 20180226649
    Abstract: A carbon material for negative electrodes in lithium ion secondary battery, wherein a specific surface area is not less than 1.5 m2/g and not more than 6.5 m2/g, a tap density is not less than 0.5 g/cm3 and not more than 1.3 g/cm3, a Raman R value is not less than 0.1 and not more than 0.4, no diffraction peak is present in a range of diffraction angle of 42.7° to 43.7° in X-ray diffraction analysis, d002 is not more than 0.337 nm, and at most one peak is present in a range of not less than 500° C. and less than 1000° C. in thermogravimetric-differential thermal analysis.
    Type: Application
    Filed: April 4, 2018
    Publication date: August 9, 2018
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasuaki WAKIZAKA, Chiaki SOTOWA, Takashi TERASHIMA