Patents by Inventor Kentei Yono
Kentei Yono 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: 8373968Abstract: Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula (Ba1-?M?)A(Ti1-?Mn?)BO3 and having hexagonal structure wherein an effective ionic radius of 12-coordinated “M” is ?20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Ba2+ and the A, B, ? and ? satisfy relations of 0.900?(A/B)?1.040, 0.003???0.05, 0.03???0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, Mn3O4 and/or Cr2O3, CuO, Al2O3, rare earth element oxide and glass component including SiO2. According to the present invention, it can be provided the hexagonal type barium titanate powder and dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing high specific permittivity, having advantageous insulation property and sufficient reliability.Type: GrantFiled: November 8, 2010Date of Patent: February 12, 2013Assignees: TDK Corporation, Japan Aerospace Exploration AgencyInventors: Tatsuya Ishii, Hidesada Natsui, Takeo Tsukada, Shinichi Yoda, Kentei Yono
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Patent number: 8293668Abstract: Dielectric ceramic composition comprising a barium titanate including barium titanate having hexagonal structure as a main component, and an element “M”, an effective ionic radius of the “M” is within ±20% with respect to an effective ionic radius of 12-coordinated Ba2+ or with respect to an effective ionic radius of 6-coordinated Ti4+, an ionic valence of the “M” is larger than that of the Ba or Ti.Type: GrantFiled: May 15, 2008Date of Patent: October 23, 2012Assignees: Japan Aerospace Exploration Agency, TDK CorporationInventors: Kentei Yono, Atsunobu Masuno, Shinichi Yoda, Hidesada Natsui
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Patent number: 8028541Abstract: Disclosed is a method of producing a barium-titanium-based ferroelectric glass using a containerless solidification process, such as an electrostatic levitation process or a gas levitation process, which comprises the steps of levitating a sample 1 of a barium-titanium-based compound by a levitating force of compressed air, heating the sample up to a temperature greater than its melting point (1330° C.) by about 100° C. to allow the sample to be molten, and, after maintaining the molten state for a given time period (at least several second), quenching the sample from a given temperature range (1400 to 1000° C.) at a cooling rate of about 103 K/sec, so as to allow the sample to be solidified while inhibiting nucleation and mixing of impurities from a container. The present invention makes it possible to provide a glass exhibiting an unprecedented, extremely large permittivity.Type: GrantFiled: March 8, 2006Date of Patent: October 4, 2011Assignee: Japan Aerospace Exploration AgencyInventors: Kentei Yono, Takehiko Ishikawa, Yasutomo Arai, Shinichi Yoda
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Patent number: 8030232Abstract: A titanium-containing oxide glass having a bulky form and substantially having a chemical composition represented by the formula: (M1)1-x(M2)x(Ti1-y1(M3)y1)y2O2 [wherein M1 represents an element selected from Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na and Ca; M2 represents at least one element selected from Mg, Ba, Ca, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, Sc, Y, Hf, Bi and Ag; M3 represents at least one element selected from V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Al, Si, P, Ga, Ge, In, Sn, Sb and Te; and x, y1, y2 and z satisfy the following requirements: 0?x?0.5, 0?y1<0.31, 1.4<y2<3.3, and 3.9<z<8.0, provided that x+y1?0 when M1 represents Ba, and y1?0 when both M1 and M2 represent Ba].Type: GrantFiled: March 21, 2011Date of Patent: October 4, 2011Assignee: Japan Aerospace Exploration AgencyInventors: Kentei Yono, Yasutomo Arai, Atsunobu Masuno, Takehiko Ishikawa, Shinichi Yoda
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Publication number: 20110167870Abstract: A titanium-containing oxide glass having a bulky form and substantially having a chemical composition represented by the formula: (M1)1-x(M2)x(Ti1-y1(M3)y1)y2O2 [wherein M1 represents an element selected from Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na and Ca; M2 represents at least one element selected from Mg, Ba, Ca, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, Sc, Y, Hf, Bi and Ag; M3 represents at least one element selected from V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Al, Si, P, Ga, Ge, In, Sn, Sb and Te; and x, y1, y2 and z satisfy the following requirements: 0?x?0.5, 0?y1<0.31, 1.4<y2<3.3, and 3.9<z<8.0, provided that x+y1?0 when M1 represents Ba, and y1?0 when both M1 and M2 represent Ba].Type: ApplicationFiled: March 21, 2011Publication date: July 14, 2011Applicant: JAPAN AEROSPACE EXPLORATION AGENCYInventors: Kentei YONO, Yasutomo ARAI, Atsunobu MASUNO, Takehiko ISHIKAWA, Shinichi YODA
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Patent number: 7960300Abstract: A titanium-containing oxide glass having a bulky form and substantially having a chemical composition represented by the formula: (M1)1-x(M2)x(Ti1-y1(M3)y1)y2Oz [wherein M1 represents an element selected from Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na and Ca; M2 represents at least one element selected from Mg, Ba, Ca, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, Sc, Y, Hf, Bi and Ag; M3 represents at least one element selected from V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Al, Si, P, Ga, Ge, In, Sn, Sb and Te; and x, y1, y2 and z satisfy the following requirements: 0?x?0.5, 0?y1<0.31, 1.4<y2<3.3, and 3.9<z<8.0, provided that x+y1?0 when M1 represents Ba, and y1?0 when both M1 and M2 represent Ba].Type: GrantFiled: September 13, 2007Date of Patent: June 14, 2011Assignee: Japan Aerospace Exploration AgencyInventors: Kentei Yono, Yasutomo Arai, Atsunobu Masuno, Takehiko Ishikawa, Shinichi Yoda
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Publication number: 20110110018Abstract: Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula (Bai-?M?)A(Ti1-?Mn?)BO3 and having hexagonal structure wherein an effective ionic radius of 12-coordinated “M” is ?20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Ba2+ and the A, B, ? and ? satisfy relations of 0.900?(A/B)?1.040, 0.003???0.05, 0.03???0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, Mn3O4 and/or Cr2O3, CuO, Al2O3, rare earth element oxide and glass component including SiO2. According to the present invention, it can be provided the hexagonal type barium titanate powder and dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing high specific permittivity, having advantageous insulation property and sufficient reliability.Type: ApplicationFiled: November 8, 2010Publication date: May 12, 2011Applicants: TDK CORPORATION, JAPAN AEROSPACE EXPLORATION AGENCYInventors: Tatsuya ISHII, Hidesada NATSUI, Takeo TSUKADA, Shinichi YODA, Kentei YONO
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Publication number: 20110111947Abstract: The disclosed is a dielectric ceramic composition in which dielectric particles 2a are formed. The dielectric particle 2a has a core 22a comprised of hexagonal barium titanate, and a shell 24a formed on an outer circumference of the core 22a and comprised of cubical or tetragonal barium titanate. The purpose of the present invention is to provide a new dielectric ceramic composition, in which permittivity is hardly lowered due to size effect, a good balance between high insulation resistance and permittivity can easily be achieved, and changes in insulation resistance and specific permittivity due to temperature are small; and an electronic component such as a multilayer ceramic capacitor using the dielectric ceramic composition as its dielectric layer.Type: ApplicationFiled: November 8, 2010Publication date: May 12, 2011Applicants: TDK CORPORATION, JAPAN AEROSPACE EXPLORATION AGENCYInventors: Hidesada NATSUI, Tatsuya ISHII, Takeo TSUKADA, Shinichi YODA, Kentei YONO
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Publication number: 20110059838Abstract: Dielectric ceramic composition comprising a barium titanate including barium titanate having hexagonal structure as a main component, and an element “M”, an effective ionic radius of the “M” is within ±20% with respect to an effective ionic radius of 12-coordinated Ba2+ or with respect to an effective ionic radius of 6-coordinated Ti4+, an ionic valence of the “M” is larger than that of the Ba or Ti.Type: ApplicationFiled: May 15, 2008Publication date: March 10, 2011Applicants: JAPAN AEROSPACE EXPLORATION AGENCY, TDK CORPORATIONInventors: Kentei Yono, Atsunobu Masuno, Shinichi Yoda, Hidesada Natsui
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Publication number: 20100022379Abstract: An optical element of the present invention exhibits at least one of an upconversion emission characteristic and a light amplifying characteristic when irradiated with an excitation light. The optical element includes a bulk glass that contains titanium oxide as a main component, and the glass further contains a rare earth element. As the rare earth element, at least one element of Er and Yb, or a combination of Yb and Tm preferably is used, for example.Type: ApplicationFiled: January 31, 2008Publication date: January 28, 2010Applicants: JAPAN AEROSPACE EXPLORATION AGENCY, NIPPON SHEET GLASS COMPANY, LIMITEDInventors: Shigeo Kittaka, Masahiro Tsuda, Kentei Yono, Atsunobu Masuno, Yasutomo Arai
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Publication number: 20100003514Abstract: A titanium-containing oxide glass having a bulky form and substantially having a chemical composition represented by the formula: (M1)1-x(M2)x(Ti1-y1(M3)y1)y2Oz [wherein M1 represents an element selected from Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na and Ca; M2 represents at least one element selected from Mg, Ba, Ca, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, Sc, Y, Hf, Bi and Ag; M3 represents at least one element selected from V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Al, Si, P, Ga, Ge, In, Sn, Sb and Te; and x, y1, y2 and z satisfy the following requirements: 0?x?0.5, 0?y1<0.31, 1.4<y2<3.3, and 3.9<z<8.0, provided that x+y1?0 when M1 represents Ba, and y1?0 when both M1 and M2 represent Ba].Type: ApplicationFiled: September 13, 2007Publication date: January 7, 2010Applicant: Japan Aerospace Exploration AgencyInventors: Kentei Yono, Yasutomo Arai, Atsunobu Masuno, Takehiko Ishikawa, Shinichi Yoda
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Patent number: 7544245Abstract: Disclosed is a method for producing a barium titanium oxide single crystal piece with a given structure using a containerless solidification process, which comprises the steps of preparing a material made of a barium titanium oxide, controlling the material to be in a levitated state within a levitation furnace, melting the levitated material using a laser, and solidifying the molten material while maintaining the levitated state. In a specific embodiment, a spherical sample having a composition of BaTiO3 and a weight of about 20 mg is subjected to a rapid solidification and melting process (temperature gradient: about 700 K/sec) 3 times while levitating the sample in 4.5 atm of air atmosphere using an electrostatic levitation furnace. Then, the re-molten sample is maintained at a temperature just below the melting point of the sample for a given time, and then rapidly cooled at a cooling rate of 300 K/sec to obtain a transparent blue barium titanium oxide single crystal.Type: GrantFiled: January 28, 2005Date of Patent: June 9, 2009Assignee: Japan Aerospace Exploration AgencyInventors: Kentei Yono, Paul-Francois Paradis, Takehiko Ishikawa, Shinichi Yoda
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Publication number: 20060205095Abstract: Disclosed is a method of producing a barium-titanium-based ferroelectric glass using a containerless solidification process, such as an electrostatic levitation process or a gas levitation process, which comprises the steps of levitating a sample 1 of a barium-titanium-based compound by a levitating force of compressed air, heating the sample up to a temperature greater than its melting point (1330° C.) by about 100° C. to allow the sample to be molten, and, after maintaining the molten state for a given time period (at least several second), quenching the sample from a given temperature range (1400 to 1000° C.) at a cooling rate of about 103 K/sec, so as to allow the sample to be solidified while inhibiting nucleation and mixing of impurities from a container. The present invention makes it possible to provide a glass exhibiting an unprecedented, extremely large permittivity.Type: ApplicationFiled: March 8, 2006Publication date: September 14, 2006Applicant: Japan Aerospace Exploration AgencyInventors: Kentei Yono, Takehiko Ishikawa, Yasutomo Arai, Shinichi Yoda
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Publication number: 20050199180Abstract: Disclosed is a method for producing a barium titanium oxide single crystal piece with a given structure using a containerless solidification process, which comprises the steps of preparing a material made of a barium titanium oxide, controlling the material to be in a levitated state within a levitation furnace, melting the levitated material using a laser, and solidifying the molten material while maintaining the levitated state. In a specific embodiment, a spherical sample having a composition of BaTiO3 and a weight of about 20 mg is subjected to a rapid solidification and melting process (temperature gradient: about 700 K/sec) 3 times while levitating the sample in 4.5 atm of air atmosphere using an electrostatic levitation furnace. Then, the re-molten sample is maintained at a temperature just below the melting point of the sample for a given time, and then rapidly cooled at a cooling rate of 300 K/sec to obtain a transparent blue barium titanium oxide single crystal.Type: ApplicationFiled: January 28, 2005Publication date: September 15, 2005Applicant: Japan Aerospace Exploration AgencyInventors: Kentei Yono, Paul-Francois Paradis, Takehiko Ishikawa, Shinichi Yoda