Patents by Inventor Hidetoshi Mizutani
Hidetoshi Mizutani 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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Publication number: 20220294009Abstract: To enhance lithium ion conductivity in an electrode for a power storage device, and at the interface between the electrode and another member. The power storage device electrode includes an oxide-based lithium ion conductive solid electrolyte, an active material, and an ionic liquid.Type: ApplicationFiled: June 24, 2020Publication date: September 15, 2022Applicant: NGK Spark Plug Co., LTD.Inventors: Manato UCHIDA, Daisuke SHISHIHARA, Hideaki HIKOSAKA, Hiroshi YAMAMOTO, Ayako KONDO, Suguru MIYAMOTO, Hidetoshi MIZUTANI
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Publication number: 20210384551Abstract: An ion conductor exhibiting high lithium ion conductivity in the form of a molded product without firing is provided. The ion conductor contains an ion conductive powder having lithium ion conductivity and an ionic liquid having lithium ion conductivity. The ionic liquid has an average thickness of 5 nm or more.Type: ApplicationFiled: May 13, 2019Publication date: December 9, 2021Inventors: Ayako KONDO, Daisuke SHISHIHARA, Yuki TAKEUCHI, Suguru MIYAMOTO, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
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Patent number: 11011776Abstract: [OBJECTS] An object of the present invention is to provide a lithium-ion-conductive ceramic material having a target ion conductivity, while suppressing production cost. Another object is to provide a high-performance lithium battery, while suppressing production cost, by virtue of having the lithium-ion-conductive ceramic material. The lithium-ion-conductive ceramic material contains Li, La, and Zr, as well as at least one of Mg and A (wherein A represents at least one element selected from the group consisting of Ca, Sr, and Ba) and which has a garnet-type crystal structure, wherein the elements contained in the ceramic material satisfy the following mole ratio conditions (1) to (3): (1) 1.33?Li/(La+A)?3; (2) 0<Mg/(La+A)?0.5; and (3) 0<A/(La+A)?0.67, and a lithium battery employing the ceramic material.Type: GrantFiled: December 29, 2017Date of Patent: May 18, 2021Assignee: NGK SPARK PLUG CO., LTD.Inventors: Yuki Takeuchi, Hirofumi Ando, Daisuke Shishihara, Hidetoshi Mizutani
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Publication number: 20210104776Abstract: Provided is an ionic conductor with which adhesion between particles can be enhanced simply by pressure-molding a powder without using sulfide ionic conductors and without performing firing or vapor deposition, and which can exhibit a high lithium ionic conductivity. This ionic conductor contains, in addition to an oxide lithium ionic conductor, a complex hydride.Type: ApplicationFiled: April 23, 2019Publication date: April 8, 2021Applicant: NGK SPARK PLUG CO., LTD.Inventors: Yuki TAKEUCHI, Manato UCHIDA, Yuta IGA, Daisuke SHISHIHARA, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
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Publication number: 20210020983Abstract: Provided is an ionic conductor that, as a molded article that has been press-molded without firing, can exhibit a high lithium ionic conductivity. The ionic conductor comprises an ionic conductive powder that has a garnet structure or garnet-like structure containing at least Li, La, Zr, and O. This ionic conductor further comprises an ionic liquid that exhibits lithium ion conductivity. The ionic conductor has a lithium ion conductivity at 25° C. of at least 1.0×10?5 S/cm.Type: ApplicationFiled: May 13, 2019Publication date: January 21, 2021Applicant: NGK SPARK PLUG CO., LTD.Inventors: Daisuke SHISHIHARA, Yuki TAKEUCHI, Ayako KONDO, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
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Publication number: 20210020985Abstract: In order to sufficiently improve the lithium ion conductivity of a molded article obtained by pressure-molding an ion conductive powder, this ion conductive powder contains a lithium ion conductive solid electrolyte which is an ionic conductor having the garnet structure or a structure similar to the garnet structure that contains at least Li, Zr, La, and O. In this ion conductive powder, the contained amount of Li2CO3 per gram of the lithium ion conductive solid electrolyte is less than 3 mg as calculated on the basis of the amount of CO2 detected at 500° C. or higher by temperature programmed desorption-mass spectrometry (TPD-MS).Type: ApplicationFiled: April 25, 2019Publication date: January 21, 2021Applicant: NGK SPARK PLUG CO., LTD.Inventors: Yuki TAKEUCHI, Daisuke SHISHIHARA, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
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Publication number: 20180269526Abstract: [OBJECTS] An object of the present invention is to provide a lithium-ion-conductive ceramic material having a target ion conductivity, while suppressing production cost. Another object is to provide a high-performance lithium battery, while suppressing production cost, by virtue of having the lithium-ion-conductive ceramic material. [MEANS FOR SOLUTION] The invention provides a lithium-ion-conductive ceramic material which contains Li, La, and Zr, as well as at least one of Mg and A (wherein A represents at least one element selected from the group consisting of Ca, Sr, and Ba) and which has a garnet-type crystal structure, wherein the elements contained in the ceramic material satisfy the following mole ratio conditions (1) to (3): (1) 1.33?Li/(La+A)?3; (2) 0<Mg/(La+A)?0.5; and (3) 0<A/(La+A)?0.67, and a lithium battery employing the ceramic material.Type: ApplicationFiled: December 29, 2017Publication date: September 20, 2018Inventors: Yuki TAKEUCHI, Hirofumi ANDO, Daisuke SHISHIHARA, Hidetoshi MIZUTANI
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Patent number: 7309669Abstract: A dielectric material comprising: a glass powder constituted of a glass comprising Si, B and an alkali metal element, the glass being amorphous in sintering at a temperature of 1,050° C. or lower; and a ceramic filler comprising at least one member of SiO2, Al2O3 and 3Al2O3.2SiO2, and an alkali metal element, wherein when a total sum of Si converted into SiO2, B converted into B2O3 and the alkali metal element converted into A2O, wherein A represents an alkali metal element, all of which are contained in the glass, is 100 mole %, the content of the alkali metal element converted into A2O, which is contained in the glass, is 0.5 mole % or less; and when a total sum of at least one member of SiO2, Al2O3 and 3Al2O3.2SiO2, and the alkali metal element converted into A2O, all of which are contained in the ceramic filler, is 100 mole %, a content of the alkali metal element converted into A2O, which is contained in the ceramic filler, is 0.5 mole % or less.Type: GrantFiled: June 24, 2005Date of Patent: December 18, 2007Assignee: NGK Spark Plug Co., Ltd.Inventors: Hiroshi Sumi, Masashi Suzumura, Tsutomu Sakai, Hidetoshi Mizutani, Manabu Sato
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Patent number: 7291789Abstract: A wiring board comprising: a conductor layer comprising Fe and Cu; and at least one of a radiator, a connection terminal, a cover and a circuit component, connected to the conductor layer through a joining member, which is obtained by coating a copper paste comprising a copper powder, an organic vehicle and an Fe2O3 particle as a conductor layer on a ceramic green sheet and firing it.Type: GrantFiled: July 17, 2003Date of Patent: November 6, 2007Assignee: NGK Spark Plug Co., Ltd.Inventors: Hiroshi Sumi, Hidetoshi Mizutani, Manabu Sato
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Publication number: 20060083930Abstract: A dielectric material comprising: a glass powder constituted of a glass comprising Si, B and an alkali metal element, the glass being amorphous in sintering at a temperature of 1,050° C. or lower; and a ceramic filler comprising at least one member of SiO2, Al2O3 and 3Al2O3.2SiO2, and an alkali metal element, wherein when a total sum of Si converted into SiO2, B converted into B2O3 and the alkali metal element converted into A2O, wherein A represents an alkali metal element, all of which are contained in the glass, is 100 mole %, the content of the alkali metal element converted into A2O, which is contained in the glass, is 0.5 mole % or less; and when a total sum of at least one member of SiO2, Al2O3 and 3Al2O3.2SiO2, and the alkali metal element converted into A2O, all of which are contained in the ceramic filler, is 100 mole %, a content of the alkali metal element converted into A2O, which is contained in the ceramic filler, is 0.5 mole % or less.Type: ApplicationFiled: June 24, 2005Publication date: April 20, 2006Inventors: Hiroshi Sumi, Masashi Suzumura, Tsutomu Sakai, Hidetoshi Mizutani, Manabu Sato
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Publication number: 20050051356Abstract: A wiring board comprising: a conductor layer comprising Fe and Cu; and at least one of a radiator, a connection terminal, a cover and a circuit component, connected to the conductor layer through a joining member, which is obtained by coating a copper paste comprising a copper powder, an organic vehicle and an Fe2O3 particle as a conductor layer on a ceramic green sheet and firing it.Type: ApplicationFiled: July 17, 2003Publication date: March 10, 2005Inventors: Hiroshi Sumi, Hidetoshi Mizutani, Manabu Sato
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Patent number: 6855399Abstract: A wiring board obtained by filling a copper paste in a via hole formed on a ceramic green sheet and firing it to form an insulating layer and a via conductor, the copper paste comprising a copper powder, an organic vehicle and at least one selected from the group consisting of: a ceramic particle having an average particle size of 100 nm or less; and an Fe2O3 particle, wherein the copper paste comprises from 6 to 20 parts by mass of the organic vehicle per 100 parts by mass of the copper powder.Type: GrantFiled: July 17, 2003Date of Patent: February 15, 2005Assignee: NGK Spark Plug Co., Ltd.Inventors: Hiroshi Sumi, Hidetoshi Mizutani, Manabu Sato
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Patent number: 6852655Abstract: The invention is to offer such a dielectric ceramic enabling to simultaneously sinter with the low resistant conductor of Ag based metals and Cu based metals, having the excellent mechanical strength and exhibiting the excellent dielectric characteristics in the GHz zone. Mixed powders of Si: 20 to 30 weight %, B: 5 to 30 weight %, Al: 20 to 30 weight %, Ca: 10 to 20 weight %, and Zn: 10 to 20 weight % are prepared, melted, and rapidly cooled to produce glass frits. The glass frits are granulated and mixed with gahnite filler and titania filler which are inorganic filler powders. Subsequently, a binder is thrown into the powders to produce a composition of dielectric ceramic, and then is formed, followed by sintering. The mixed powders may contain at least one kind of alkali metal of Li, K and Na.Type: GrantFiled: January 30, 2003Date of Patent: February 8, 2005Assignee: NGK Spark Plug Co., Ltd.Inventors: Eiji Kodera, Kazuyuki Fujii, Makoto Baba, Hidetoshi Mizutani, Manabu Sato
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Publication number: 20040023011Abstract: A wiring board obtained by coating a copper paste on a ceramic green sheet and firing it to form a conductor layer and an insulating layer, the copper paste comprising a copper powder, an organic vehicle and at least one selected from the group consisting of: an SiO2 particle having an average particle size of 50 nm or less; and a ceramic particle having an average particle size of 100 nm or less and non-vitrifiable after sintering.Type: ApplicationFiled: July 17, 2003Publication date: February 5, 2004Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroshi Sumi, Hidetoshi Mizutani, Manabu Sato
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Publication number: 20040013860Abstract: A wiring board obtained by filling a copper paste in a via hole formed on a ceramic green sheet and firing it to form an insulating layer and a via conductor, the copper paste comprising a copper powder, an organic vehicle and at least one selected from the group consisting of: a ceramic particle having an average particle size of 100 nm or less; and an Fe2O3 particle, wherein the copper paste comprises from 6 to 20 parts by mass of the organic vehicle per 100 parts by mass of the copper powder.Type: ApplicationFiled: July 17, 2003Publication date: January 22, 2004Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroshi Sumi, Hidetoshi Mizutani, Manabu Sato
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Publication number: 20030216240Abstract: The invention is to offer such a dielectric ceramic enabling to simultaneously sinter with the low resistant conductor of Ag based metals and Cu based metals, having the excellent mechanical strength and exhibiting the excellent dielectric characteristics in the GHz zone. Mixed powders of Si: 20 to 30 weight %, B: 5 to 30 weight %, Al: 20 to 30 weight %, Ca: 10 to 20 weight %, and Zn: 10 to 20 weight % are prepared, melted, and rapidly cooled to produce glass frits. The glass frits are granulated and mixed with gahnite filler and titania filler which are inorganic filler powders. Subsequently, a binder is thrown into the powders to produce a composition of dielectric ceramic, and then is formed, followed by sintering. The mixed powders may contain at least one kind of alkali metal of Li, K and Na.Type: ApplicationFiled: January 30, 2003Publication date: November 20, 2003Applicant: NGK SPARK PLUG CO., LTD.Inventors: Eiji Kodera, Kazuyuki Fujii, Makoto Baba, Hidetoshi Mizutani, Manabu Sato
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Publication number: 20030170436Abstract: A dielectric material comprising: a glass powder constituted of a glass comprising Si, B and an alkali metal element, the glass being amorphous in sintering at a temperature of 1,050° C. or lower; and a ceramic filler comprising at least one member of SiO2, Al2O3 and 3Al2O3.2Si2, and an alkali metal element, wherein when a total sum of Si converted into SiO2, B converted into B2O3 and the alkali metal element converted into A2O, wherein A represents an alkali metal element, all of which are contained in the glass, is 100 mole %, the content of the alkali metal element converted into A2O, which is contained in the glass, is 0.5 mole % or less; and when a total sum of at least one member of SiO2, Al2O3 and 3Al2O3.2SiO2, and the alkali metal element converted into A2O, all of which are contained in the ceramic filler, is 100 mole %, a content of the alkali metal element converted into A2O, which is contained in the ceramic filler, is 0.5 mole % or less.Type: ApplicationFiled: December 23, 2002Publication date: September 11, 2003Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroshi Sumi, Masashi Suzumura, Tsutomu Sakai, Hidetoshi Mizutani, Manabu Sato
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Patent number: 6602623Abstract: A low-temperature firing ceramic composition contains Sr2MgSi2O7 crystals forming a major crystal phase of the composition. This composition can be produced, for example, by a process including the steps of (a) mixing together a silica powder, a magnesia powder and a strontium oxide powder to obtain a powder mixture; (b) subjecting the powder mixture to a calcination at a temperature of 1,000-1,200° C. to obtain a calcination product containing Sr2MgSi2O7 crystals; (c) mixing the calcination product with alumina powder, boron oxide powder, lithium oxide powder, binder and ethanol to obtain a powder mixture; (d) granulating the powder mixture; (e) shaping the resulting granules into a green body; (f) compacting the green body by a hydrostatic pressing (CIP); and (g) firing the resulting compact in an atmosphere of air, thereby obtaining the composition.Type: GrantFiled: October 26, 2000Date of Patent: August 5, 2003Assignee: NGK Spark Plug Co., Ltd.Inventors: Hidetoshi Mizutani, Tsutomu Sakai, Masashi Suzumura, Satoshi Iio
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Patent number: 6121174Abstract: A dielectric material is disclosed which has a small absolute value of the temperature coefficient of resonance frequency and a high coefficient of unloaded quality. Also disclosed are a process for producing the dielectric material and multilayer and other circuit boards containing the dielectric material. The dielectric material is a highly densified material having a water absorption lower than 0.1%, which is obtained by mixing 95.5 to 99.5 percent by weight mixture of a glass frit and a strontium compound with 0.5 to 4.5 percent by weight titanium dioxide, compacting the resultant mixture, and sintering the compact at a relatively low temperature around 930.degree. C. This dielectric material is a glass ceramic containing strontium anorthite (SrAl.sub.2 Si.sub.2 O.sub.8) as the main crystalline phase, and may contain the TiO.sub.2, which remains unchanged after sintering. The absolute value of the temperature coefficient of resonance frequency of the dielectric material is 20 ppm/.degree. C.Type: GrantFiled: September 26, 1997Date of Patent: September 19, 2000Assignee: NGK Spark Plug Co., Ltd.Inventors: Hitoshi Yokoi, Hidetoshi Mizutani, Motohiko Sato, Kazushige Ohbayashi
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Patent number: RE38491Abstract: Powders of BaCO3, TiO2, ZnO, etc. are mixed to each other at a predetermined ratio of quantity, calcined in an atmospheric air at &pgr;°-120° C., and pulverized to obtain a calcined powder having an average grain size from 1 to 3 &mgr; m, 0.1 to 20 parts-by weight of a powder having an average grain size from 0.1 to 1.5 &mgr;m comprising a glass having a transition point of not higher than 450° C. obtained by mixing powders of Pb3O4, SiO2, Na2O, etc. to each other, melting and then pouring into water and pulverizing the thus obtained glass is admixed to the calcined powder. The mixture is dried, pelleted by adding a resin and the pellet powder is molded into a cylindrical shape, applied with CIP (Cold isotartic press), and the molding product after the treatment is sintered in an atmospheric air at 850° to 1000° C. to obtain a dielectric ceramic sintered at low temperature.Type: GrantFiled: March 15, 2000Date of Patent: April 6, 2004Assignee: NGK Spark Plug Co., Ltd.Inventors: Hidetoshi Mizutani, Masahiko Okuyama, Noritaka Yoshida, Hirofumi Ozeki, Hiroshi Katagiri