Patents by Inventor Katsuro Hayashi
Katsuro Hayashi 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).
-
Publication number: 20190172605Abstract: Disclosed herein is an amorphous C12A7 electride thin film which has an electron density of greater than or equal to 2.0×1018 cm?3 and less than or equal to 2.3×1021 cm?3, and exhibits a light absorption at a photon energy position of 4.6 eV. Also disclosed herein is an amorphous thin film which is fabricated using a target made of a crystalline C12A7 electride, and containing an electride of an amorphous solid material includig calcium, aluminum, and oxygen, in which an Al/Ca molar ratio of the thin film is 0.5 to 4.7.Type: ApplicationFiled: February 7, 2019Publication date: June 6, 2019Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Hideo HOSONO, Yoshitake TODA, Katsuro HAYASHI, Setsuro ITO, Satoru WATANABE, Naomichi MIYAKAWA, Toshinari WATANABE, Kazuhiro ITO
-
Patent number: 10249402Abstract: A C12A7 electride thin film fabrication method includes a step of forming an amorphous C12A7 electride thin film on a substrate by vapor deposition under an atmosphere with an oxygen partial pressure of less than 0.1 Pa using a target made of a crystalline C12A7 electride having an electron density within a range of 2.0×1018 cm?3 to 2.3×1021 cm?3.Type: GrantFiled: December 11, 2014Date of Patent: April 2, 2019Assignees: TOKYO INSTITUTE OF TECHNOLOGY, AGC Inc., JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Hideo Hosono, Yoshitake Toda, Katsuro Hayashi, Setsuro Ito, Satoru Watanabe, Naomichi Miyakawa, Toshinari Watanabe, Kazuhiro Ito
-
Publication number: 20150093583Abstract: A C12A7 electride thin film fabrication method includes a step of forming an amorphous C12A7 electride thin film on a substrate by vapor deposition under an atmosphere with an oxygen partial pressure of less than 0.1 Pa using a target made of a crystalline C12A7 electride having an electron density within a range of 2.0×1018 cm?3 to 2.3×1021 cm?3.Type: ApplicationFiled: December 11, 2014Publication date: April 2, 2015Applicants: TOKYO INSTITUTE OF TECHNOLOGY, ASAHI GLASS COMPANY, LIMITEDInventors: Hideo HOSONO, Yoshitake TODA, Katsuro HAYASHI, Setsuro ITO, Satoru WATANABE, Naomichi MIYAKAWA, Toshinari WATANABE, Kazuhiro ITO
-
Patent number: 7722846Abstract: Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost. A production method of an electroconductive mayenite type compound comprising a step of subjecting a precursor to heat treatment, is a method for preparing an electroconductive mayenite type compound, comprising a step of subjecting a precursor to heat treatment; wherein the precursor is a vitreous or crystalline material, which contains Ca and Al, in which a molar ratio of (CaO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, and in which a total amount of CaO and Al2O3 is at least 50 mol %, and wherein the heat treatment is heat treatment comprising holding the precursor at a heat treatment temperature T of from 600 to 1415° C. and in an inert gas or vacuum atmosphere with an oxygen partial pressure PO2 in a range of PO2?105×exp [{?7.9×l04/(T+273)}+14.4] in the unit of Pa.Type: GrantFiled: November 30, 2007Date of Patent: May 25, 2010Assignees: Asahi Glass Company, Limited, Tokyo Institute of TechnologyInventors: Hideo Hosono, Katsuro Hayashi, Sung Wng Kim, Masahiro Hirano, Satoru Narushima, Setsuro Ito
-
Patent number: 7670585Abstract: Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost without need for expensive facilities, a reaction at high temperature and for a long period of time, or complicated control of reaction. A method for preparing an electroconductive mayenite type compound comprises a step of subjecting a precursor to heat treatment, wherein the precursor contains Ca and/or Sr, and Al, a molar ratio of (a total of CaO and SrO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, a total content of CaO, SrO and Al2O3 in the precursor is at least 50 mol %, and the precursor is a vitreous or crystalline material; and the method comprises a step of mixing the precursor with a reducing agent and performing the heat treatment of holding the mixture at 600-1,415° C. in an inert gas or vacuum atmosphere with an oxygen partial pressure of at most 10 Pa.Type: GrantFiled: November 30, 2007Date of Patent: March 2, 2010Assignees: Asahi Glass Company, Limited, Tokyo Institute of TechnologyInventors: Hideo Hosono, Katsuro Hayashi, Sung Wng Kim, Masahiro Hirano, Satoru Narushima, Setsuro Ito
-
Patent number: 7662357Abstract: Disclosed is a 12CaO.7Al2O3 compound, a 12SrO.7Al2O3 compound, or a mixed crystal compound of 12CaO.7Al2O3 and 12SrO.7Al2O3, which contains a negative hydrogen ion (H?, H2?, H2? at a concentration of 1×1018 cm?3 or more. A negative hydrogen ion comprising a primary component of a hydride ion is incorporated into C12A7 (12CaO.7Al2O3), so that a function of being converted from an insulative material to an electrically conductive material in a sustained manner by means of irradiation with light can be exhibited even in the normal atmosphere at a room temperature. The present invention also provides a solid electrolyte capable of conducting a negative hydrogen ion, and means for releasing a hydride ion from the inside of a solid into a gaseous phase using an electric field.Type: GrantFiled: April 18, 2003Date of Patent: February 16, 2010Assignee: Japan Science and Technology AgencyInventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi
-
Patent number: 7507289Abstract: In a solid solution system of Al2O3 and CAO or SrO, it has been difficult to obtain a material having a high electrical conductivity (>10?4 S·cm?) at room temperature. A compound is provided in which electrons at a high concentration are introduced into a 12CaO.7Al2O3 compound, a 12SrO.7Al2O3 compound, or a mixed crystal compound containing 12CaO.7Al2O3 and 12SrO.7Al2O3. The compound formed by substituting all the free oxygen ions with electrons is regarded as an electride compound in which [Ca24Al28O64]4+(4e?) or [Sr24Al28O64]4+(4e?) serves as a cation and electrons serve as anions. When a single crystal or a hydrostatic pressure press molded material of a fine powder thereof is held at approximately 700° C. in an alkaline metal vapor or an alkaline earth metal vapor, melt of a hydrostatic pressure press molded material of a powder is held at approximately 1,600° C. in a carbon crucible, followed by slow cooling for solidification, or a thin film of the compound held at approximately 600° C.Type: GrantFiled: February 12, 2004Date of Patent: March 24, 2009Assignee: Japan Science and Technology AgencyInventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi, Masashi Miyakawa, Isao Tanaka
-
Patent number: 7465433Abstract: To provide a method for preparing a mayenite type compound having electroconductivity imparted. A method for preparing an electroconductive mayenite type compound, which comprises melting a raw material containing Al and at least one element selected from the group consisting of Ca and Sr, holding the melt in a low oxygen partial pressure atmosphere having an oxygen partial pressure of not higher than 10 Pa, followed by cooling or annealing in a low oxygen partial pressure atmosphere or in atmospheric air for solidification, thereby to replace oxygen present in cages by electrons in a high concentration.Type: GrantFiled: August 14, 2006Date of Patent: December 16, 2008Assignees: Asahi Glass Company, Limited, Japan Science and Technology AgencyInventors: Hideo Hosono, Katsuro Hayashi, Masashi Miyakawa, Masahiro Hirano, Sungwng Kim, Setsuro Ito, Satoru Narushima
-
Patent number: 7462334Abstract: The present invention provides a method for producing negatively charged oxygen atoms comprising: placing a negative electrode (3) on a surface of a member (2) made of calcium-aluminum composite oxide, proximately placing a positive electrode (10) on a side of the member opposite to the surface on which the negative electrode is placed, supplying oxygen to the negative electrode side, and applying voltage between the negative electrode and the positive electrode so as to extract negatively charged oxygen atoms (A) from the side where the positive electrode (10) is placed. The present invention also provides an apparatus for producing negatively charged oxygen atoms which is used for the above method.Type: GrantFiled: December 11, 2002Date of Patent: December 9, 2008Assignees: Japan Science and Technology Agency, Oxy Japan Company LimitedInventors: Hideo Hosono, Katsuro Hayashi, Masahiro Hirano, Masayoshi Sadakata
-
Publication number: 20080095688Abstract: Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost without need for expensive facilities, a reaction at high temperature and for a long period of time, or complicated control of reaction. A method for preparing an electroconductive mayenite type compound comprises a step of subjecting a precursor to heat treatment, wherein the precursor contains Ca and/or Sr, and Al, a molar ratio of (a total of CaO and SrO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, a total content of CaO, SrO and Al2O3 in the precursor is at least 50 mol %, and the precursor is a vitreous or crystalline material; and the method comprises a step of mixing the precursor with a reducing agent and performing the heat treatment of holding the mixture at 600-1,415° C. in an inert gas or vacuum atmosphere with an oxygen partial pressure of at most 10 Pa.Type: ApplicationFiled: November 30, 2007Publication date: April 24, 2008Applicants: ASAHI GLASS COMPANY, LIMITED, Tokyo Institute of TechnologyInventors: Hideo Hosono, Katsuro Hayashi, Sung Kim, Masahiro Hirano, Satoru Narushima, Setsuro Ito
-
Publication number: 20080089826Abstract: Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost. A production method of an electroconductive mayenite type compound comprising a step of subjecting a precursor to heat treatment, is a method for preparing an electroconductive mayenite type compound, comprising a step of subjecting a precursor to heat treatment; wherein the precursor is a vitreous or crystalline material, which contains Ca and Al, in which a molar ratio of (CaO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, and in which a total amount of CaO and Al2O3 is at least 50 mol %, and wherein the heat treatment is heat treatment comprising holding the precursor at a heat treatment temperature T of from 600 to 1415° C. and in an inert gas or vacuum atmosphere with an oxygen partial pressure PO2 in a range of PO2?105×exp[{?7.9×l04/(T+273)}+14.4] in the unit of Pa.Type: ApplicationFiled: November 30, 2007Publication date: April 17, 2008Applicants: ASAHI GLASS COMPANY, LIMITED, Tokyo Institute of TechnologyInventors: Hideo Hosono, Katsuro Hayashi, Sung Kim, Masahiro Hirano, Satoru Narushima, Setsuro Ito
-
Patent number: 7235225Abstract: There is provided a C12A7 compound capable of selectively and reversibly clathrating X? ions, such as active oxygen radicals, with improved controllability. The C12A7 compound clathrating OH? ions and On? at a concentration of 2×1019 cm?3 or less can be prepared by subjecting a mixed material containing Ca and Al to a solid phase reaction at a firing temperature not lower than 1200° C. and lower than 1449° C. in a dry oxygen atmosphere having an oxygen partial pressure of 0.1 atm or more and a water vapor partial pressure of 10?3 atm or less, keeping the resultant product at a temperature of 1200° C. or higher, and cooling rapidly. The C12A7 compound is heat-treated to clathrate OH? ions at a concentration of 2×1019 cm?3 or less, and On? at a high concentration of more than 2×1019 cm?3. The compound can reversibly clathrate or release On? ion radicals through the elevation or lowering of the temperature thereof in a temperature range of 300 to 850° C.Type: GrantFiled: October 17, 2002Date of Patent: June 26, 2007Assignee: Japan Science and Technology AgencyInventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi
-
Publication number: 20060276326Abstract: To provide a method for preparing a mayenite type compound having electroconductivity imparted. A method for preparing an electroconductive mayenite type compound, which comprises melting a raw material containing Al and at least one element selected from the group consisting of Ca and Sr, holding the melt in a low oxygen partial pressure atmosphere having an oxygen partial pressure of not higher than 10 Pa, followed by cooling or annealing in a low oxygen partial pressure atmosphere or in atmospheric air for solidification, thereby to replace oxygen present in cages by electrons in a high concentration.Type: ApplicationFiled: August 14, 2006Publication date: December 7, 2006Applicants: ASAHI GLASS COMPANY, LIMITED, JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Hideo Hosono, Katsuro Hayashi, Masashi Miyakawa, Masahiro Hirano, Sungwng Kim, Setsuro Ito, Satoru Narushima
-
Publication number: 20060151311Abstract: In a solid solution system of Al2O3 and CAO or SrO, it has been difficult to obtain a material having a high electrical conductivity (>10?4 S·cm?) at room temperature. A compound is provided in which electrons at a high concentration are introduced into a 12CaO.7Al2O3 compound, a 12SrO.7Al2O3 compound, or a mixed crystal compound containing 12CaO.7Al2O3 and 12SrO.7Al2O3. The compound formed by substituting all the free oxygen ions with electrons is regarded as an electride compound in which [Ca24Al28O64]4+(4e?) or [Sr24Al28O64]4+(4e?) serves as a cation and electrons serve as anions. When a single crystal or a hydrostatic pressure press molded material of a fine powder thereof is held at approximately 700° C. in an alkaline metal vapor or an alkaline earth metal vapor, melt of a hydrostatic pressure press molded material of a powder is held at approximately 1,600° C. in a carbon crucible, followed by slow cooling for solidification, or a thin film of the compound held at approximately 600° C.Type: ApplicationFiled: February 12, 2004Publication date: July 13, 2006Inventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi, Isao Tanaka
-
Publication number: 20050279279Abstract: Disclosed is a 12CaO.7Al2O3 compound, a 12SrO.7Al2O3 compound, or a mixed crystal compound of 12CaO.7Al2O3 and 12SrO.7Al2O3, which contains a negative hydrogen ion (H?, H2?, H2? at a concentration of 1×1018 cm?3 or more. A negative hydrogen ion comprising a primary component of a hydride ion is incorporated into C12A7 (12CaO.7Al2O3), so that a function of being converted from an insulative material to an electrically conductive material in a sustained manner by means of irradiation with light can be exhibited even in the normal atmosphere at a room temperature. The present invention also provides a solid electrolyte capable of conducting a negative hydrogen ion, and means for releasing a hydride ion from the inside of a solid into a gaseous phase using an electric field.Type: ApplicationFiled: April 18, 2003Publication date: December 22, 2005Inventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi
-
Publication number: 20050061657Abstract: The present invention provides a method for producing negatively charged oxygen atoms comprising: placing a negative electrode (3) on a surface of a member (2) made of calcium-aluminum composite oxide, proximately placing a positive electrode (10) on a side of the member opposite to the surface on which the negative electrode is placed, supplying oxygen to the negative electrode side, and applying voltage between the negative electrode and the positive electrode so as to extract negatively charged oxygen atoms (A) from the side where the positive electrode (10) is placed. The present invention also provides an apparatus for producing negatively charged oxygen atoms which is used for the above method.Type: ApplicationFiled: December 11, 2002Publication date: March 24, 2005Inventors: Hideo Hosono, Katsuro Hayashi, Masahiro Hirano, Masayoshi Sadakata
-
Publication number: 20050053546Abstract: There is provided a C12A7 compound capable of selectively and reversibly clathrating X? ions, such as active oxygen radicals, with improved controllability. The C12A7 compound clathrating OH? ions and On? at a concentration of 2×1019 cm?3 or less can be prepared by subjecting a mixed material containing Ca and Al to a solid phase reaction at a firing temperature not lower than 1200° C. and lower than 1449° C. in a dry oxygen atmosphere having an oxygen partial pressure of 0.1 atm or more and a water vapor partial pressure of 10?3 atm or less, keeping the resultant product at a temperature of 1200° C. or higher, and cooling rapidly. The C12A7 compound is heat-treated to clathrate OH? ions at a concentration of 2×1019 cm?3 or less, and On? at a high concentration of more than 2×1019 cm?3. The compound can reversibly clathrate or release On? ion radicals through the elevation or lowering of the temperature thereof in a temperature range of 300 to 850° C.Type: ApplicationFiled: October 17, 2002Publication date: March 10, 2005Inventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi
-
Patent number: 6818192Abstract: The present invention provides a 12CaO.7Al2O3 compound containing an O2− ion radical and/or an O− ion radical in a high concentration of 1020 cm−3 or more. This compound can be used as an oxidization catalyst, antibacterial agent, ion conductor, or electrode material for solid-oxide fuel cells.Type: GrantFiled: February 14, 2002Date of Patent: November 16, 2004Assignee: Japan Science and Technology CorporationInventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi
-
Publication number: 20020172726Abstract: The present invention provides a 12CaO.7Al2O3 compound containing an O2− ion radical and/or an O− ion radical in a high concentration of 1020 cm−3 or more. This compound can be used as an oxidization catalyst, antibacterial agent, ion conductor, or electrode material for solid-oxide fuel cells.Type: ApplicationFiled: February 14, 2002Publication date: November 21, 2002Inventors: Hideo Hosono, Masahiro Hirano, Katsuro Hayashi
-
Publication number: 20010030728Abstract: The liquid crystal display includes a connecting terminal, equipped with a light transmitting portion at the picture-frame region, and a conductive portion joined this connecting terminal. The conductive portion provides an electrical connection between two substrates. The picture-frame region is a region outside a display region for displaying an image and makes no contribution to the display of the image. It is preferable that the conductive portion be a transfer and that the connecting terminal be a connecting pad which is a transfer.Type: ApplicationFiled: March 30, 2001Publication date: October 18, 2001Inventors: Shinji Takasugi, Katsuro Hayashi