Patents by Inventor Kiyoshi Komura
Kiyoshi Komura 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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Patent number: 7588628Abstract: The present invention provides methods for making a microporous ceramic material using a metal silicon powder and including a reaction sintering process of the silicon. A material for forming a microporous ceramic material used in these methods includes a metal silicon powder, a silicon nitride powder and/or a silicon carbide powder, and if desired, a yttrium oxide powder and/or an aluminum oxide powder. These methods can make a microporous ceramic material that can be used preferably as a gas or liquid filter, a catalyst carrier or a support of a gas separation membrane.Type: GrantFiled: October 10, 2007Date of Patent: September 15, 2009Assignees: Noritake Co., Limited, Chubu Electric Power Co., Inc.Inventors: Yasunori Ando, Seiji Yamada, Hisatomi Taguchi, Yosuke Takahashi, Shigeo Nagaya, Kiyoshi Komura
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Patent number: 7442344Abstract: It is an object of the present invention to provide a ceramic member with excellent balance between oxygen ion conductivity and endurance (resistance to cracking and the like), an oxygen ion permeation module and a chemical reactor such as an oxygen separator, using such a ceramic member. The ceramic member with oxygen ion conductivity in accordance with the present invention has a perovskite-type crystal structure and a composition represented by the general formula: (Ln1?xMx)(Ti1?yFey)O3 (where Ln represents at least one element selected from lanthanoids, and M represents at least one element selected from the group containing Sr, Ca, and Ba, 0<x<1, 0.4?y<1, x+y?1). The oxygen ion permeation module composed by employing such a ceramic member can be used as a structural component of an oxygen separator, an oxidation reactor (for example, a reactor for partial oxidation of hydrocarbons), and the like.Type: GrantFiled: November 7, 2002Date of Patent: October 28, 2008Assignees: Chubu Electric Power Co., Inc., Noritake Co., LimitedInventors: Takehiro Suzuki, Atsushi Fukaya, Hisatomi Taguchi, Shigeo Nagaya, Kiyoshi Komura, Syozo Watanabe
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Patent number: 7364713Abstract: It is an object of the present invention to provide a raw material powder for stably obtaining a dense sinter that is prevented from cracking, and a method for manufacturing this powder, and a method for manufacturing a lanthanum-based oxide ion conductor in which this raw material powder is used. The raw material powder manufacturing method of the present invention is a method for manufacturing a raw material powder for forming an oxide ion conductor composed of a multi-component metal oxide including lanthanum or lanthanide, wherein a mixed powder blended such that all of the elements constituting said multi-component metal oxide are included is prefired, after which this prefired powder is exposed to water or moist gas so as to expand at least some of the particles in said powder. Alternatively, two types of mixed powder with different components are prefired separately, after which the prefired powders are blended in a specific ratio.Type: GrantFiled: February 10, 2003Date of Patent: April 29, 2008Assignees: Noritake Co., Limited, Chubu Electric Power Co., Inc., KCM CorporationInventors: Hisatomi Taguchi, Atsushi Fukaya, Shigeo Nagaya, Kiyoshi Komura, Kiichi Hirano, Hiroshi Tenjikukatsura
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Publication number: 20080092502Abstract: The present invention provides methods for making a microporous ceramic material using a metal silicon powder and including a reaction sintering process of the silicon. A material for forming a microporous ceramic material used in these methods includes a metal silicon powder, a silicon nitride powder and/or a silicon carbide powder, and if desired, a yttrium oxide powder and/or an aluminum oxide powder. These methods can make a microporous ceramic material that can be used preferably as a gas or liquid filter, a catalyst carrier or a support of a gas separation membrane.Type: ApplicationFiled: October 10, 2007Publication date: April 24, 2008Applicants: NORITAKE CO., LIMITED, CHUBU ELECTRIC POWER CO., INC.Inventors: Yasunori Ando, Seiji Yamada, Hisatomi Taguchi, Yosuke Takahashi, Shigeo Nagaya, Kiyoshi Komura
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Patent number: 7109137Abstract: The present invention provides a method for making a microporous ceramic material and includes the steps of (a) preparing a starting material for firing comprising a nonoxide ceramic precursor containing silicon as an essential component; (b) heating the starting material for firing in an atmosphere containing at least 1 mol % of hydrogen so as to form microporous ceramic product; and (c) cooling the microporous ceramic product.Type: GrantFiled: April 27, 2005Date of Patent: September 19, 2006Assignees: Noritake Co., Limited, Chubu Electric Power Co., Inc.Inventors: Balagopal N. Nair, Yasunori Ando, Hisatomi Taguchi, Shigeo Nagaya, Kiyoshi Komura
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Patent number: 7018707Abstract: A porous ceramic laminate has a porous silicon nitride substrate and a porous silicon nitride separation film supported thereon and having minute pores of sizes capable of Knudsen separation or molecular sieve by sintering a porous silicon nitride substrate supporting a formed layer containing polysilazane at 800° C. in a nitrogen atmosphere.Type: GrantFiled: March 2, 2001Date of Patent: March 28, 2006Assignees: Noritake Co., Limited, Chubu Electric Power Co., Inc.Inventors: Shigekazu Mase, Shigeo Nagaya, Junichiro Tsubaki, Kiyoshi Komura
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Publication number: 20050227060Abstract: A porous ceramic laminate has a porous silicon nitride substrate and a porous silicon nitride separation film supported thereon and having minute pores of sizes capable of Knudsen separation or molecular sieve by sintering a porous silicon nitride substrate supporting a formed layer containing polysilazane at 800° C. in a nitrogen atmosphere.Type: ApplicationFiled: May 31, 2005Publication date: October 13, 2005Applicant: NORITAKE CO., LIMITEDInventors: Shigekazu Mase, Shigeo Nagaya, Junichiro Tsubaki, Kiyoshi Komura
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Publication number: 20050211626Abstract: The present invention provides a method for making a microporous ceramic material and includes the steps of (a) preparing a starting material for firing comprising a nonoxide ceramic precursor containing silicon as an essential component; (b) heating the starting material for firing in an atmosphere containing at least 1 mol % of hydrogen so as to form microporous ceramic product; and (c) cooling the microporous ceramic product.Type: ApplicationFiled: April 27, 2005Publication date: September 29, 2005Applicants: Noritake Co., Limited, Chubu Electric Power Co., Inc.Inventors: Balagopal Nair, Yasunori Ando, Hisatomi Taguchi, Shigeo Nagaya, Kiyoshi Komura
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Publication number: 20050124484Abstract: It is an object of the present invention to provide a raw material powder for stably obtaining a dense sinter that is prevented from cracking, and a method for manufacturing this powder, and a method for manufacturing a lanthanum-based oxide ion conductor in which this raw material powder is used. The raw material powder manufacturing method of the present invention is a method for manufacturing a raw material powder for forming an oxide ion conductor composed of a multi-component metal oxide including lanthanum or lanthanide, wherein a mixed powder blended such that all of the elements constituting said multi-component metal oxide are included is prefired, after which this prefired powder is exposed to water or moist gas so as to expand at least some of the particles in said powder. Alternatively, two types of mixed powder with different components are prefired separately, after which the prefired powders are blended in a specific ratio.Type: ApplicationFiled: February 10, 2003Publication date: June 9, 2005Applicants: Noritake Co., Limited, Chubu Electronic Power Co., Inc., KCM CorporationInventors: Hisatomi Taguchi, Atsushi Fukaya, Shigeo Nagaya, Kiyoshi Komura, Kiichi Hirano, Hiroshi Tenjikukatsura
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Patent number: 6903039Abstract: The present invention provides a method for making a microporous ceramic material and includes the steps of (a) preparing a starting material for firing comprising a nonoxide ceramic precursor containing silicon as an essential component; (b) heating the starting material for firing in an atmosphere containing at least 1 mol % of hydrogen so as to form microporous ceramic product; and (c) cooling the microporous ceramic product.Type: GrantFiled: February 19, 2003Date of Patent: June 7, 2005Assignees: Noritake Co., Limited, Chubu Electric Power Co., Inc.Inventors: Balagopal N. Nair, Yasunori Ando, Hisatomi Taguchi, Shigeo Nagaya, Kiyoshi Komura
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Publication number: 20050006249Abstract: It is an object of the present invention to provide a ceramic member with excellent balance between oxygen ion conductivity and endurance (resistance to cracking and the like), an oxygen ion permeation module and a chemical reactor such as an oxygen separator, using such a ceramic member. The ceramic member with oxygen ion conductivity in accordance with the present invention has a perovskite-type crystal structure and a composition represented by the general formula (Ln1-xMx)(Ti1-yFey)O3 (where Ln represents at least one element selected from lanthanoids, and M represents at least one element selected from the group containing Sr, Ca, and Ba, 0<x<1, 0.4?y<1, x+y?1). The oxygen ion permeation module composed by employing such a ceramic member can be used as a structural component of an oxygen separator, an oxidation reactor (for example, a reactor for partial oxidation of hydrocarbons), and the like.Type: ApplicationFiled: November 7, 2002Publication date: January 13, 2005Inventors: Takehiro Suzuki, Atsushi Fukaya, Hisatomi Taguchi, Shigeo Nagaya, Kiyoshi Komura, Syozo Watanabe
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Publication number: 20040043888Abstract: The present invention provides methods for making a microporous ceramic material using a metal silicon powder and including a reaction sintering process of the silicon. A material for forming a microporous ceramic material used in these methods includes a metal silicon powder, a silicon nitride powder and/or a silicon carbide powder, and if desired, a yttrium oxide powder and/or an aluminum oxide powder. These methods can make a microporous ceramic material that can be used preferably as a gas or liquid filter, a catalyst carrier or a support of a gas separation membrane.Type: ApplicationFiled: August 26, 2003Publication date: March 4, 2004Applicants: Noritake Co., Limited, Chubu Electric Power Co., IncInventors: Yasunori Ando, Seiji Yamada, Hisatomi Taguchi, Yosuke Takahashi, Shigeo Nagaya, Kiyoshi Komura
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Publication number: 20040009865Abstract: The present invention provides a method for making a microporous ceramic material and includes the steps of (a) preparing a starting material for firing comprising a nonoxide ceramic precursor containing silicon as an essential component; (b) heating the starting material for firing in an atmosphere containing at least 1 mol % of hydrogen so as to form microporous ceramic product; and (c) cooling the microporous ceramic product.Type: ApplicationFiled: February 19, 2003Publication date: January 15, 2004Applicants: NORITAKE CO., LIMITED, CHUBU ELECTRIC POWER CO., INC.Inventors: Balagopal N. Nair, Yasunori Ando, Hisatomi Taguchi, Shigeo Nagaya, Kiyoshi Komura
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Publication number: 20020014298Abstract: A porous ceramic laminate has a porous silicon nitride substrate and a porous silicon nitride separation film supported thereon and having minute pores of sizes capable of Knudsen separation or molecular sieve by sintering a porous silicon nitride substrate supporting a formed layer containing polysilazane at 800° C. in a nitrogen atmosphere.Type: ApplicationFiled: March 2, 2001Publication date: February 7, 2002Inventors: Shigekazu Mase, Shigeo Nagaya, Junichiro Tsubaki, Kiyoshi Komura