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    Ceramic honeycomb filter
    3.
    发明授权
    Ceramic honeycomb filter 有权

    公开(公告)号：US11383190B2

    公开(公告)日：2022-07-12

    申请号：US16960802

    申请日：2019-03-29

    Applicant: HITACHI METALS, LTD.

    Inventor： Wataru Soga

    IPC: B01D39/20 ,  B01D46/24 ,  F01N3/022

    Abstract: A ceramic honeycomb filter comprising a cordierite-type ceramic honeycomb structure having large numbers of flow paths partitioned by porous cell walls, and plugs formed in end portions of predetermined flow paths of the ceramic honeycomb structure; the cell walls having a thermal expansion coefficient Tw (×10−7/° C.) of 10 or less in the flow path direction between 40° C. and 800° C.; the plugs comprising at least ceramic particles, and 5-25 parts by mass of an amorphous oxide matrix per 100 parts by mass of the ceramic particles; the ceramic particles comprising at least 42-90% by mass of amorphous silica particles, and 10-58% by mass of cordierite particles; and the amorphous silica particles comprising 4-30% by mass of first silica particles having a median particle diameter of 10-40 μm, and 70-96% by mass of second silica particles having a median particle diameter of 70-200 μm.

    Method and apparatus for producing ceramic honeycomb filter
    4.
    发明授权
    Method and apparatus for producing ceramic honeycomb filter 有权

    公开(公告)号：US10737207B2

    公开(公告)日：2020-08-11

    申请号：US16331405

    申请日：2017-09-29

    Applicant: HITACHI METALS, LTD.

    Inventor： Wataru Soga

    IPC: B01D46/00 ,  B01D46/24 ,  C04B38/00 ,  C04B111/00 ,  B28B11/00 ,  F01N3/022 ,  B05D7/22

    Abstract: A method for producing a ceramic honeycomb filter having a ceramic honeycomb structure having plugs in predetermined cells: comprising using an apparatus having a reservoir having an inlet for a plugging material slurry and an upper opening, a porous plate with pluralities of openings covering the upper opening of the reservoir, and a holding member fixed to an upper end of the reservoir; keeping a lower surface of the sealing film attached to a lower end surface of the ceramic honeycomb structure apart from an upper surface of the porous plate by a distance D of more than 0 mm and 2.0 mm or less; supplying a predetermined volume of the plugging material slurry into the reservoir to introduce it into the predetermined cells of the ceramic honeycomb structure; rotating the ceramic honeycomb structure after sealing of the ceramic honeycomb structure is released; and lifting the ceramic honeycomb structure after the rotation starts.

    Ceramic honeycomb filter and its production method
    5.
    发明授权
    Ceramic honeycomb filter and its production method 有权

    公开(公告)号：US10556833B2

    公开(公告)日：2020-02-11

    申请号：US15867991

    申请日：2018-01-11

    Applicant: HITACHI METALS, LTD.

    Inventor： Atsuhiro Noguchi ,  Wataru Soga

    IPC: C04B38/00 ,  B01D46/24 ,  F01N3/022 ,  C04B35/195

    Abstract: A ceramic honeycomb filter comprising a ceramic honeycomb structure having pluralities of flow paths partitioned by porous cordierite cell walls, and plugs formed in predetermined flow paths of the ceramic honeycomb structure; the plugs being formed by ceramic particles and an amorphous oxide matrix existing between the ceramic particles; in a cross section of the plugs, an area ratio A1 of the amorphous oxide matrix in a longitudinal range of ⅓×t from one end, and an area ratio A2 of the amorphous oxide matrix in a longitudinal range of ⅓×t from the other end meeting the relation of ½≤A1/A2≤2, wherein t represents the length of the plug in a direction perpendicular to the longitudinal direction of the plug.

    CERAMIC HONEYCOMB STRUCTURE AND ITS PRODUCTION METHOD
    7.
    发明申请
    CERAMIC HONEYCOMB STRUCTURE AND ITS PRODUCTION METHOD 有权
    陶瓷蜂窝结构及其生产方法

    公开(公告)号：US20140248464A1

    公开(公告)日：2014-09-04

    申请号：US14350708

    申请日：2012-09-21

    Applicant: HITACHI METALS, LTD.

    Inventor： Wataru Soga

    IPC: C04B38/00

    CPC classification number: C04B38/0012 ,  B01D39/20 ,  B01D46/00 ,  B01D46/0001 ,  B01D46/2462 ,  B01J35/04 ,  B28B11/006 ,  B28B11/0845 ,  B28B19/0038 ,  C04B38/00 ,  C04B38/0006 ,  C04B41/009 ,  C04B41/5089 ,  C04B41/85 ,  C04B2111/0081 ,  Y10T428/24157 ,  C04B35/00 ,  C04B35/195 ,  C04B41/4572 ,  C04B41/53

    Abstract: A method for producing a ceramic honeycomb structure comprising a ceramic honeycomb body having large numbers of longitudinal cells partitioned by porous cell walls, and a peripheral wall formed on a peripheral surface of the ceramic honeycomb structure, comprising the steps of extruding a moldable ceramic material to form a honeycomb-structured ceramic green body; machining a peripheral portion of the green body or a sintered body obtained from the green body to remove part of cell walls in the peripheral portion, thereby obtaining the ceramic honeycomb body having longitudinal grooves on the peripheral surface; applying a coating material to the peripheral surface of the ceramic honeycomb body to form the peripheral wall, as well as to peripheral portions of both end surfaces of the ceramic honeycomb body; and inserting the coating material applied to the peripheral portions of both end surfaces into peripheral cells, with partially remaining on the peripheral portions.

    Abstract translation: 一种陶瓷蜂窝结构体的制造方法，其特征在于，包括具有多孔室隔壁的多个纵向孔的陶瓷蜂窝体和形成在所述陶瓷蜂窝结构体的周面的周壁的陶瓷蜂窝结构体的制造方法，其特征在于， 形成蜂窝结构的陶瓷生坯; 加工生坯体的周边部分或从生坯体获得的烧结体，以除去周边部分的细胞壁部分，从而获得在周面上具有纵向凹槽的陶瓷蜂窝体; 在陶瓷蜂窝体的周面上涂覆涂料以形成周壁，以及陶瓷蜂窝体的两个端面的周边部分; 并且将施加到两个端面的周边部分的涂层材料插入周边电池中，部分保留在周边部分上。

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