Patents by Inventor Asuka Sasakura
Asuka Sasakura 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: 11123709Abstract: To provide a molded article which can have excellent strength, can also have high durability during repeated use, and can maintain high adsorption performance even when the content of a binder resin is reduced. A molded article containing cerium oxide particles and a binder resin, wherein cerium oxide particles which has an average particle diameter of 1 to 15 ?m and in each of which a crystallite size is 40 to 200 ? are used.Type: GrantFiled: January 31, 2018Date of Patent: September 21, 2021Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Asuka Sasakura, Katsuhiko Hayashi, Atsushi Kurosaki, Masanori Sato, Kazuya Kinoshita, Takahito Asanuma, Seiji Moriuchi
-
Publication number: 20190381481Abstract: To provide a molded article which can have excellent strength, can also have high durability during repeated use, and can maintain high adsorption performance even when the content of a binder resin is reduced. A molded article containing cerium oxide particles and a binder resin, wherein cerium oxide particles which has an average particle diameter of 1 to 15 ?m and in each of which a crystallite size is 40 to 200 ? are used.Type: ApplicationFiled: January 31, 2018Publication date: December 19, 2019Inventors: Asuka Sasakura, Katsuhiko Hayashi, Atsushi Kurosaki, Masanori Sato, Kazuya Kinoshita, Takahito Asanuma, Seiji Moriuchi
-
Patent number: 9312454Abstract: Provided is a novel coated phosphor capable of effectively suppressing the adverse effects of hydrogen sulfide gas generated by the reaction between a sulfur-containing phosphor and moisture in the air. Provided is a sulfur-containing phosphor having a configuration in which ZnO compound containing Zn and O is present on the surface of a sulfur-containing phosphor having a host material which includes sulfur.Type: GrantFiled: December 6, 2011Date of Patent: April 12, 2016Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Jun-ichi Itoh, Asuka Sasakura, Masaaki Inamura, Riichi Ogawara, Akinori Kumagai
-
Patent number: 9166119Abstract: A highly reliable light-emitting device is provided, which is capable of effectively suppressing detrimental effects of sulfuric gas. A light-emitting device comprising a solid light-emitting element 1, a metal member 2 reacting with sulfuric gas and a phosphor-containing layer 5 that contains a phosphor 3, the phosphor-containing layer 5 containing a sulfuric gas-adsorbing substance 4 that adsorbs sulfuric gas, and, when the phosphor-containing layer 5 is tripartitioned from the side near the metal member to far into a proximal layer portion, an intermediate layer portion and an outer layer portion, the concentration of sulfuric gas-adsorbing substance 4 in the proximal layer portion is made to be higher than those for the intermediate layer portion and the outer layer portion.Type: GrantFiled: February 22, 2012Date of Patent: October 20, 2015Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Haruka Shimizu, Masaaki Inamura, Asuka Sasakura, Akinori Kumagai
-
Patent number: 8912553Abstract: Provided is a novel coated phosphor capable of effectively suppressing the adverse effects of hydrogen sulfide gas generated by the reaction between a sulfur-containing phosphor and moisture in the air. Provided is a sulfur-containing phosphor having a configuration in which ZnO compound containing Zn and O is present on the surface of a sulfur-containing phosphor having a host material which includes sulfur.Type: GrantFiled: December 6, 2011Date of Patent: December 16, 2014Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Jun-ichi Itoh, Asuka Sasakura, Masaaki Inamura, Riichi Ogawara, Akinori Kumagai
-
Publication number: 20140196763Abstract: In order to provide a novel CaS:Eu series red phosphor in which moisture-resistance has been improved, a red phosphor is proposed, containing Ba at 0.001 to 1.00 mol % with respect to CaS in a red phosphor represented by the general formula: CaS:Eu.Type: ApplicationFiled: August 7, 2012Publication date: July 17, 2014Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Asuka Sasakura, Jun-ichi Itoh, Masaaki Inamura, Akinori Kumagai, Haruka Shimizu
-
Publication number: 20140021502Abstract: A highly reliable light-emitting device is provided, which is capable of effectively suppressing detrimental effects of sulfuric gas. A light-emitting device comprising a solid light-emitting element 1, a metal member 2 reacting with sulfuric gas and a phosphor-containing layer 5 that contains a phosphor 3, the phosphor-containing layer 5 containing a sulfuric gas-adsorbing substance 4 that adsorbs sulfuric gas, and, when the phosphor-containing layer 5 is tripartitioned from the side near the metal member to far into a proximal layer portion, an intermediate layer portion and an outer layer portion, the concentration of sulfuric gas-adsorbing substance 4 in the proximal layer portion is made to be higher than those for the intermediate layer portion and the outer layer portion.Type: ApplicationFiled: February 22, 2012Publication date: January 23, 2014Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Haruka Shimizu, Masaaki Inamura, Asuka Sasakura, Akinori Kumagai
-
Patent number: 8603360Abstract: An emitting phosphor is provided, which can be excited by a blue LED or a near-UV LED, emit visible light and increase internal quantum efficiency. An emitting phosphor is proposed, comprising an orthorhombic crystal system comprising Ga and S, wherein the orthorhombic crystal system has, in an XRD pattern using a Cu K? beam, a proportion of the diffraction intensity of the maximum peak appearing at diffraction angle 2?=16.0 to 18.0° with respect to the diffraction intensity of the maximum peak appearing at diffraction angle 2?=23.6 to 24.8° of 0.4 or greater.Type: GrantFiled: June 2, 2010Date of Patent: December 10, 2013Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Asuka Sasakura, Jun-ichi Itoh, Taizo Morinaka
-
Publication number: 20130256715Abstract: Provided is a novel coated phosphor capable of effectively suppressing the adverse effects of hydrogen sulfide gas generated by the reaction between a sulfur-containing phosphor and moisture in the air. Provided is a sulfur-containing phosphor having a configuration in which ZnO compound containing Zn and O is present on the surface of a sulfur-containing phosphor having a host material which includes sulfur.Type: ApplicationFiled: December 6, 2011Publication date: October 3, 2013Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Jun-ichi Itoh, Asuka Sasakura, Masaaki Inamura, Riichi Ogawara, Akinori Kumagai
-
Patent number: 8282859Abstract: A green emitting phosphor exhibiting an excellent absorption ratio is provided. A green emitting phosphor containing a crystal represented by MGa2S4:Eu2+, wherein M is an element comprising one species or a combination of two or more species among Sr, Ba and Ca, and Eu2+ is a luminescent center, and wherein the particle diameter at 10%, D10, 4.5 ?m to 30 ?m in the volume-based particle size distribution measured and obtained by the laser diffraction/diffusion particle size distribution measurement method.Type: GrantFiled: May 8, 2009Date of Patent: October 9, 2012Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Jun-ichi Itoh, Asuka Sasakura, Taizou Morinaka
-
Publication number: 20120081001Abstract: A green emitting phosphor is provided, allowing the internal quantum efficiency to be increased. The green emitting phosphor comprises a mother crystal containing Sr, Ga and S, and a luminescent center, characterized in that, in an XRD pattern, the ratio of the diffraction intensity of the maximum peak appearing at diffraction angle 2?=14 to 20° over the diffraction intensity of the maximum peak appearing at diffraction angle 2?=21 to 27° is 0.4 or greater.Type: ApplicationFiled: December 15, 2011Publication date: April 5, 2012Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Riichi Ogawara, Asuka Sasakura, Jun-ichi Itoh, Taizou Morinaka
-
Patent number: 8147717Abstract: A green emitting phosphor is provided, allowing the internal quantum efficiency to be increased. The green emitting phosphor comprises a mother crystal containing Sr, Ga and S, and a luminescent center, characterized in that, in an XRD pattern, the ratio of the diffraction intensity of the maximum peak appearing at diffraction angle 2?=14 to 20° over the diffraction intensity of the maximum peak appearing at diffraction angle 2?=21 to 27° is 0.4 or greater.Type: GrantFiled: January 7, 2009Date of Patent: April 3, 2012Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Riichi Ogawara, Asuka Sasakura, Jun-ichi Itoh, Taizou Morinaka
-
Publication number: 20120018674Abstract: An emitting phosphor is provided, which can be excited by a blue LED or a near-UV LED, emit visible light and increase internal quantum efficiency. An emitting phosphor is proposed, comprising an orthorhombic crystal system comprising Ga and S, wherein the orthorhombic crystal system has, in an XRD pattern using a Cu K? beam, a proportion of the diffraction intensity of the maximum peak appearing at diffraction angle 2?=16.0 to 18.0° with respect to the diffraction intensity of the maximum peak appearing at diffraction angle 2?=23.6 to 24.8° of 0.4 or greater.Type: ApplicationFiled: June 2, 2010Publication date: January 26, 2012Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Asuka Sasakura, Jun-ichi Itoh, Taizo Morinaka
-
Publication number: 20110253940Abstract: A green emitting phosphor exhibiting an excellent absorption ratio is provided. A green emitting phosphor containing crystal represented by MGa2S4:Eu2+, wherein M is an element comprising one species or a combination of two or more species among Sr, Ba and Ca, and Eu2+ is a luminescent center, and wherein the particle diameter at 10%, D10 4.5 ?m to 30 ?m in the volume-based particle size distribution measured and obtained by the laser diffraction/diffusion particle size distribution measurement method.Type: ApplicationFiled: May 8, 2009Publication date: October 20, 2011Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Jun-ichi Itoh, Asuka Sasakura, Taizou Morinaka
-
Publication number: 20110114985Abstract: A green emitting phosphor is provided, allowing the internal quantum efficiency to be increased. A green emitting phosphor is proposed, which is a green emitting phosphor comprising a mother crystal containing Sr, Ga and S, and a luminescent center, characterized in that, in an XRD pattern, the ratio of the diffraction intensity of the maximum peak appearing at diffraction angle 2?=14 to 20° over the diffraction intensity of the maximum peak appearing at diffraction angle 2?=21 to 27° is 0.4 or greater.Type: ApplicationFiled: January 7, 2009Publication date: May 19, 2011Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Riichi Ogawara, Asuka Sasakura, Jun-ichi Itoh, Taizou Morinaka
-
Patent number: 7659658Abstract: A white phosphor is provided, which is a white phosphor comprising a single material, wherein the light-emitting center is one element other than Mn, and emitting white light having excellent color rendering properties by near ultraviolet excitation. The white phosphor is represented by the formula SraSbMgcZndSieOf:Eu2+ (with the proviso that when e=1, 0<(c+d)/(a+c+d)?0.2, 1.8?a+c+d?2.2, 0?b/(b+f)?0.07 and 3.0?b+f?4.4), among which, as one preferred example, the white phosphor is represented by the composition formula (SrO1-?S?)x.(Mg1-?Zn?O)y.(SiO2)z:Eu2+ (in the formula, 4.5?x/y?27.5, 3?z/y?14.5, 0???0.3 and 0???0.7) is proposed.Type: GrantFiled: May 17, 2007Date of Patent: February 9, 2010Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Tomoyasu Yano, Asuka Sasakura, Jun-ichi Itoh
-
Publication number: 20090108732Abstract: A white phosphor is provided, which is a white phosphor comprising a single material, wherein the light-emitting center is one element other than Mn, and emitting white light having excellent color rendering properties by near ultraviolet excitation. The white phosphor is represented by the formula SraSbMgcZndSieOf:Eu2+ (with the proviso that when e=1, 0<(c+d)/(a+c+d)?0.2, 1.8?a+c+d?2.2, 0?b/(b+f)?0.07 and 3.0?b+f?4.4), among which, as one preferred example, the white phosphor is represented by the composition formula (SrO1??S?)x.(Mg1??Zn?O)y.(SiO2)z:Eu2+ (in the formula, 4.5?x/y?27.5, 3?z/y?14.5, 0???0.3 and 0???0.7) is proposed.Type: ApplicationFiled: May 17, 2007Publication date: April 30, 2009Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Tomoyasu Yano, Asuka Sasakura, Jun-ichi Itoh
-
Patent number: 7517473Abstract: A method for producing a blue phosphor, comprising firing a mixture for 2 to 24 hours at a temperature of 800° C. or higher in an atmosphere of hydrogen sulfide, carbon disulfide, or an inert gas, the mixture containing a barium compound component, a silicon compound component, and a cerium compound component in quantitative proportions such that the atomic ratios of the components fulfill the equations 0.50<Si/Ba?0.70 and 0.0005 ?Ce/Ba?0.03, or the mixture further containing a sulfur compound component in addition to these components. The blue phosphor has high color purity, high luminance, high chemical stability, and a low crystallization temperature, and is suitable for use in displays such as FED, PDP, and EL displays, or for use in the excitation of near-ultraviolet LED.Type: GrantFiled: March 23, 2006Date of Patent: April 14, 2009Assignees: Tottori University, Mitsui Mining & Smelting Co., Ltd.Inventors: Koutoku Ohmi, Makoto Higuchi, Jun-ichi Itoh, Tomoyasu Yano, Asuka Sasakura
-
Publication number: 20060244366Abstract: There is provided a blue excited yellow fluorescent material that shows a broad light emitting spectrum ranging from green components to red components, is easy to control color tones, has high color rendering properties, and can provide white light close to natural light (sunlight), by combining with a blue light emitting element such as LED. To achieve the above features, a blue excited yellow fluorescent materials comprising an alkaline earth metal sulfide as a crystal base material, the fluorescent material activated by Ce3+ and Eu2+ or Mn2+ is used; and specifically, a blue excited yellow fluorescent material represented by (Ca1-xSrx)S:Ce, Eu or (Ca1-xSrx)S:Ce, Mn is preferably used.Type: ApplicationFiled: April 27, 2006Publication date: November 2, 2006Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Asuka Sasakura, Tomoyasu Yano, Jun-ichi Itoh
-
Publication number: 20060214135Abstract: A method for producing a blue phosphor, comprising firing a mixture for 2 to 24 hours at a temperature of 800° C. or higher in an atmosphere of hydrogen sulfide, carbon disulfide, or an inert gas, the mixture containing a barium compound component, a silicon compound component, and a cerium compound component in quantitative proportions such that the atomic ratios of the components fulfill the equations 0.50<Si/Ba?0.70 and 0.0005?Ce/Ba?0.03, or the mixture further containing a sulfur compound component in addition to these components. The blue phosphor has high color purity, high luminance, high chemical stability, and a low crystallization temperature, and is suitable for use in displays such as FED, PDP, and EL displays, or for use in the excitation of near-ultraviolet LED.Type: ApplicationFiled: March 23, 2006Publication date: September 28, 2006Inventors: Koutoku Ohmi, Makoto Higuchi, Jun-ichi Itoh, Tomoyasu Yano, Asuka Sasakura