-
公开(公告)号：US20180077798A1
公开(公告)日：2018-03-15
申请号：US15552282
申请日：2015-12-16
Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
Inventor： Hidefumi FUJITA , Shuji KANEDA , Daisuke ITOH
CPC classification number: H05K1/097 , B05D3/06 , B05D3/12 , H01B1/22 , H01B3/448 , H01B5/00 , H01B5/14 , H01B13/00 , H05K1/0386 , H05K3/12 , H05K3/1291 , H05K2203/0278
Abstract: To provide a copper electroconductive film formed on a paper substrate, the copper electroconductive film being considerably improved in weather resistance and electroconductivity. The problem can be achieved by an electroconductive film formed by pressing a sintered electroconductive film formed by sintering copper particles in a coating film containing copper powder on a paper substrate along with the substrate, the electroconductive film having an area ratio of copper occupying on a cross section of the electroconductive film in parallel to a thickness direction thereof of 82.0% or more. The electroconductive film can be produced by pressing, for example, by roll press to from 90 to 190° C., after light sintering.
-
公开(公告)号：US20240228316A9
公开(公告)日：2024-07-11
申请号：US18278436
申请日：2022-03-17
Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
Inventor： Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE
IPC: C01G33/00
CPC classification number: C01G33/00 , C01P2004/60 , C01P2004/82 , C01P2006/40 , C01P2006/80
Abstract: A powder contains a niobium complex and lithium, an amount of niobium being 25 mass % or more and 75 mass % or less, a proportion of niobium in metal elements of the powder is 0.775 or more and 0.950 or less in terms of mass ratio. When the powder is dissolved in 8 times its mass of water at 25° C., a niobium content contained in a filtrate thereof is 80 mass % or more of an amount of niobium contained in the powder before dissolution. The powder is obtained by mixing a niobium compound, a lithium compound, an alkali, hydrogen peroxide, and water to obtain an aqueous solution containing a niobium complex and lithium and then drying the solution at a temperature equal to or lower than a decomposition temperature of the niobium complex. The powder is suitable for preparing a lithium niobate precursor solution for coating positive electrode active material particles.
-
公开(公告)号：US20220392676A1
公开(公告)日：2022-12-08
申请号：US17773865
申请日：2020-11-19
Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
Inventor： Hidefumi FUJITA , Koji TANOUE , Keisuke YAMADA , Tetsuya KAWAHITO
Abstract: A silicon oxide-coated soft magnetic powder, in which the ratio of a volume-based cumulative 50% particle diameter D50 (HE) according to a dry laser diffraction particle size distribution analysis to the same particle diameter D50 (MT) according to a wet laser diffraction particle size distribution analysis is 0.7 or more, and a coverage ratio R defined by R=Si×100/(Si+M) (Si and M are molar fractions of Si and elements constituting the soft magnetic powder) is 70% or more is obtained by subjecting a slurry containing a soft magnetic powder containing 20 mass % or more of iron and a hydrolysate of a silicon alkoxide to a dispersion treatment when the surface of the soft magnetic powder is coated with the hydrolysate in a mixed solvent of water and an organic substance. The powder has good insulation/dispersibility properties and a high filling factor during molding.
-
Patent Agency Ranking
公开(公告)号：US20240132368A1
公开(公告)日：2024-04-25
申请号：US18278436
申请日：2022-03-16
Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
Inventor： Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE
IPC: C01G33/00
CPC classification number: C01G33/00 , C01P2004/60 , C01P2004/82 , C01P2006/40 , C01P2006/80
Abstract: A powder contains a niobium complex and lithium, an amount of niobium being 25 mass % or more and 75 mass % or less, a proportion of niobium in metal elements of the powder is 0.775 or more and 0.950 or less in terms of mass ratio. When the powder is dissolved in 8 times its mass of water at 25° C., a niobium content contained in a filtrate thereof is 80 mass % or more of an amount of niobium contained in the powder before dissolution. The powder is obtained by mixing a niobium compound, a lithium compound, an alkali, hydrogen peroxide, and water to obtain an aqueous solution containing a niobium complex and lithium and then drying the solution at a temperature equal to or lower than a decomposition temperature of the niobium complex. The powder is suitable for preparing a lithium niobate precursor solution for coating positive electrode active material particles.
-
公开(公告)号：US20190240735A1
公开(公告)日：2019-08-08
申请号：US16342545
申请日：2017-10-25
Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
Inventor： Kimitaka SATO , Hidefumi FUJITA
CPC classification number: B22F9/24 , B22F1/0044 , B22F2301/255 , B22F2304/054 , B82Y30/00 , B82Y40/00
Abstract: [Problem] In the production of silver nanowires, the necessarily amount of the silver-containing liquid is decreased, and the yield of long silver nanowires is improved.[Solution] A method for producing silver nanowires, including adding a silver-containing liquid to an alcohol solvent having dissolved therein a chloride, a bromide, an aluminum salt, an alkali metal hydroxide, and an organic protective agent, so as to perform reduction deposition of silver in a wire form in the alcohol solvent, the silver-containing liquid to be added having dissolved therein a silver compound in a silver concentration of from 3.5 to 32.0 mol/L. The silver-containing liquid used is preferably a water-containing solvent having a mass proportion of water of from 4.0 to 100.0%.
-
公开(公告)号：US20240416418A1
公开(公告)日：2024-12-19
申请号：US18819107
申请日：2024-08-29
Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
Inventor： Hidefumi FUJITA , Koji TANOUE , Keisuke YAMADA , Tetsuya KAWAHITO
Abstract: [Problem] To provide a silicon oxide-coated soft magnetic powder having a silicon oxide coating with few defects so as to have an excellent insulation property, and having good dispersibility in an aqueous solution, and capable of obtaining a high filling factor when molding a green compact.
[Means for Solution] A highly insulating silicon oxide-coated soft magnetic powder, in which the ratio of a volume-based cumulative 50% particle diameter D50 (HE) according to a dry laser diffraction particle size distribution analysis to the same particle diameter D50 (MT) according to a wet laser diffraction particle size distribution analysis is 0.7 or more, and a coverage ratio R defined by R=Si×100/(Si+M) (wherein Si and M are molar fractions of Si and elements constituting the soft magnetic powder) is 70% or more is obtained by subjecting a slurry containing a soft magnetic powder containing 20 mass % or more of iron and a hydrolysate of a silicon alkoxide to a dispersion treatment when the surface of the soft magnetic powder is coated with the hydrolysate in a mixed solvent of water and an organic substance.-
公开(公告)号：US20230051009A1
公开(公告)日：2023-02-16
申请号：US17878460
申请日：2022-08-01
Inventor： Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE , Kazuki MURAISHI , Masaru KUBOTA , Yuki ISHIGAKI
Abstract: Provided is a lithium-containing oxide precursor solution for coating an electrode active material that is capable of improving the coverage of a coating layer that is formed by applying the lithium-containing oxide precursor solution to the surface of powder of the electrode active material and king it, and that is easy to handle in a normal atmosphere because a solution composed mainly of water is used as a solvent. The lithium-containing oxide precursor solution for coating an electrode active material includes Li in an amount of 0.1 mass % or more and 5.0 mass % or less, at least one element selected from Nb, F, Fe, P, Ta, V, Ge, B, Al, Ti, Si, W, Zr, Mo, S, Cl, Br, and I in an amount of 0.05 mass % or more and 35 mass % or less, and water in an amount of 60 mass % or more and 98.4 mass % or less. The value of absorbance of the solution at a wavelength of 660 nm is 0.1 or less, and the value of surface energy thereof is 72 mN/m or less.
-
公开(公告)号：US20230045543A1
公开(公告)日：2023-02-09
申请号：US17872293
申请日：2022-07-25
Inventor： Kazuki MURAISHI , Masaru KUBOTA , Yuki ISHIGAKI , Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE
IPC: C01G33/00 , H01M10/0525 , C01B25/30
Abstract: Provided are a coated active material having excellent properties that can reduce the reaction resistance of a battery, and a method for producing a coated active material that can achieve both a high processing speed and high processing quality. The method for producing a coated active material includes: mixing an electrode active material and a coating solution containing Li and an element M and having a surface energy of 72 mN/m or less to prepare a slurry; and drying the slurry in an air flow and thereby causing a Li-containing oxide to adhere to at least a portion of the surface of the electrode active material, to obtain a coated active material, where the element M is at least one element selected from Nb, F, Fe, P, Ta, V, Ge, B, Al, Ti, Si, W, Zr, Mo, S, Cl, Br, and I.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.016 seconds)
