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    3.
    发明专利
    未知

    公开(公告)号：DE602005004209T2

    公开(公告)日：2009-01-02

    申请号：DE602005004209

    申请日：2005-08-16

    Applicant: DOWA ELECTRONICS MATERIALS CO

    Inventor： SATO KIMITAKA

    IPC: B22F1/00 ,  B22F9/24 ,  G11B5/64 ,  H01F1/00

    Abstract: Alloy particles of an alloy having a face-centered cubic structure comprise at least one selected from Fe and Co and at least one selected from Pt and Pd as principal components. The alloy particles have a TEM-measured average grain size (D TEM ) of not more than 50 nm, and a single crystallinity (D TEM )/(D X ) that is less than 1.50, where (D X ) is X-ray crystallite size. These alloy particles can be advantageously manufactured by using the polyol process to synthesize the alloy particles in the presence of a complexing agent.

    LOW-TEMPERATURE SINTERED SILVER NANOPARTICLE COMPOSITION AND ELECTRONIC ARTICLES FORMED USINGK THE SAME
    5.
    发明专利
    LOW-TEMPERATURE SINTERED SILVER NANOPARTICLE COMPOSITION AND ELECTRONIC ARTICLES FORMED USINGK THE SAME 未知

    公开(公告)号：SG178823A1

    公开(公告)日：2012-05-30

    申请号：SG2011073053

    申请日：2010-08-27

    Applicant: DOWA ELECTRONICS MATERIALS CO ,  PCHEM ASSOCIATES INC

    Inventor： MASTROPIETRO MICHEAL A ,  SATO KIMITAKA ,  MIYOSHI HIROMASA ,  FUJITA HIDEFUMI

    Abstract: LOW-TEMPERATURE SINTERED SILVER NANOPARTICLE COMPOSITION AND ELECTRONIC ARTICLES FORMED USING THE SAMEAbstractA silver nanoparticle composition is provided which is5 possible to be sintered through sintering at a low temperature in a short time and to form silver electro conductive film and wiring which is favorable for adhesion to a substrate and low in resistance, and articles using the same are provided. The silver nanoparticle composition is provided, wherein a main10 component of a solvent is water, a pH of the composition is within a range of 5.3 to 8.0, a silver nanoparticle included in the composition is protected by an organic acid or a derivative thereof, and the content of the organic acid or the derivative thereof with respect to silver is 2 to 20% by mass. when published

    6.
    发明专利
    未知

    公开(公告)号：DE602005003722T2

    公开(公告)日：2008-11-27

    申请号：DE602005003722

    申请日：2005-08-04

    Applicant: DOWA ELECTRONICS MATERIALS CO

    Inventor： SATO KIMITAKA

    IPC: B22F1/00 ,  B22F9/24

    Abstract: The invention provides a powder of fine particles of an alloy of platinum-family metal having a surface with a large amount of unevenness that is suitable as a catalyst metal. It is a powder of an alloy containing T and M in a composition ratio represented by the formula [ T X M 1 -X ], where T is one or two or more of the elements Fe, Co and Ni, M is one or two or more of the elements Pt, Pd and Ru, X represents a numerical value in the range 0.1-0.9, and wherein: its average grain size as measured under TEM observation ( D TEM ) is 50 nm or less, and under TEM observation, a plurality of protruding points is observed on the surface of the particles and indentations are observed between the protruding points, making it a fine powder of alloy particles with an uneven surface. This powder of fine alloy particles has a crystal structure with a face-centered cubic (fcc) structure, and its single crystallinity ( D TEM )/( D X ) is 1.50 or greater. In addition, the average grain size of the alloy particles as found by the dynamic light-scattering method is 50 nm or less.

    7.
    发明专利
    未知

    公开(公告)号：DE60323703D1

    公开(公告)日：2008-11-06

    申请号：DE60323703

    申请日：2003-03-06

    Applicant: DOWA ELECTRONICS MATERIALS CO

    Inventor： MATSUMOTO KAZUYUKI ,  SATO KIMITAKA ,  FUJINO TAKATOSHI ,  INOUE KENICHI

    IPC: G11B5/706 ,  G11B5/712 ,  G11B5/842

    Abstract: A ferromagnetic iron alloy powder for a magnetic recording medium is composed of acicular iron-base particles of an average major axis length (X) of not less than 20 nm and not greater than 80 nm and have oxygen content of not less than 15 wt% and coercive force (Hc) of not less than Ä0.0036 X - 1.1 X + 110 X - 1390 (Oe)Ü (where X is average major axis length expressed in nm). The ferromagnetic iron alloy powder is obtained by reacting metal powder composed of acicular iron-base particles having an average major axis length of not less than 20 nm and not greater than 80 nm with pure water in substantial absence of oxygen to form a metal oxide film on the particle surfaces. Optionally, the particles can be reacted with a weak oxidizing gas by a wet or dry method.

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