CATALYST FOR SOLID POLYMER FUEL CELLS AND METHOD FOR PRODUCING SAME

    公开(公告)号:US20210126264A1

    公开(公告)日:2021-04-29

    申请号:US16605738

    申请日:2018-04-16

    摘要: The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum and a transition metal M are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which a molar ratio (Pt/M) of platinum to the transition metal M that form catalyst particles is 2.5 or more, and a ratio (SCOMSA/SBET) of a platinum specific surface area (SCOMSA) measured by a CO adsorption method to a catalyst specific surface area (SBET) measured by a BET method is 0.26 or more and 0.32 or less. The catalyst can be produced by preparing an alloy catalyst, then washing the alloy catalyst with a platinum compound solution, and additionally supplying platinum to the surfaces of catalyst particles.

    SPUTTERING TARGET
    92.
    发明申请

    公开(公告)号:US20210087673A1

    公开(公告)日:2021-03-25

    申请号:US17041315

    申请日:2019-01-17

    摘要: A sputtering target that can be used for forming a buffer layer that enables magnetic crystal grains in a magnetic recording layer granular film to be well separated when the magnetic recording layer granular film is stacked above a Ru underlayer. The target contains a metal and an oxide, wherein: the contained metal becomes a nonmagnetic metal including an hcp structure if the entirety of the contained metal is made into a single metal, the lattice constant “a” of the hcp structure included in the nonmagnetic metal being 2.59 Å or more and 2.72 Å or less; the contained metal includes 4 at % or more of metallic Ru relative to the whole amount of the contained metal; and the sputtering target contains 20 vol % or more and 50 vol % or less of the oxide relative to the entire sputtering target, the melting point of the contained oxide being 1700° C. or more.

    ALLOY FOR MEDICAL USE, AND METHOD FOR PRODUCING SAME

    公开(公告)号:US20210047717A1

    公开(公告)日:2021-02-18

    申请号:US17077344

    申请日:2020-10-22

    IPC分类号: C22F1/14 C22C5/02

    摘要: The present invention provides an alloy for medical use including an Au—Pt alloy, in which the Au—Pt alloy has a Pt concentration of 24 mass % or more and less than 34 mass % with the balance being Au, and has at least a material structure in which a Pt-rich phase having a Pt concentration higher than that of an α-phase is distributed in an α-phase matrix, the Pt-rich phase has a Pt concentration that is 1.2 to 3.8 times the Pt concentration of the α-phase, and the Pt-rich phase has an area ratio of 1 to 22% in any cross-section. This alloy is an artifact-free alloy material that exhibits excellent compatibility with a magnetic field environment such as an MRI and has magnetic susceptibility of ±4 ppm with respect to magnetic susceptibility of water.

    STRUCTURE AND METHOD FOR SEALING THROUGH-HOLE, AND TRANSFER SUBSTRATE FOR SEALING THROUGH-HOLE

    公开(公告)号:US20200230701A1

    公开(公告)日:2020-07-23

    申请号:US16486140

    申请日:2018-04-04

    摘要: A sealing structure with a surface of a base material with a through-hole, an underlying metal film, and a sealing member bonded to the underlying metal film to seal the through-hole. The sealing member includes a compressed product of a metal powder including gold having a purity of 99.9% by mass or more and a lid-like metal film including a bulk-like metal including gold and having a thickness of not less than 0.01 μm and not more than 5 μm. The sealing material includes an outer periphery-side densified region in contact with an underlying metal film and a center-side porous region in contact with the through-hole. The shape of pores in the densified region is specified, and the horizontal length (l) of a pore in the radial direction at any cross-section of the densified region and the width (W) of the densified region satisfy the relationship of l≤0.1W.

    Catalyst for solid polymer fuel cell and method for producing same

    公开(公告)号:US10454113B2

    公开(公告)日:2019-10-22

    申请号:US14400424

    申请日:2013-06-19

    摘要: The present invention is a catalyst for a solid polymer fuel cell including: catalyst particles of platinum, cobalt and manganese; and a carbon powder carrier supporting the catalyst particles, wherein the component ratio (molar ratio) of the platinum, cobalt and manganese of the catalyst particles is of Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, and wherein in an X-ray diffraction analysis of the catalyst particles, the peak intensity ratio of a Co—Mn alloy appearing around 2θ=27° is 0.15 or less on the basis of a main peak appearing around 2θ=40°. It is particularly preferred that the catalyst have a peak ratio of a peak of a CoPt3 alloy and an MnPt3 alloy appearing around 2θ=32° of 0.14 or more on the basis of a main peak.