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公开(公告)号：US10112180B2
公开(公告)日：2018-10-30
申请号：US15026760
申请日：2014-10-02
发明人： Akira Morikawa , Kae Konishi , Toshitaka Tanabe , Akihiko Suda , Masahide Miura , Isao Chinzei , Hiromasa Suzuki , Akiya Chiba , Kosuke Iizuka
IPC分类号： B01J23/10 , C01G25/00 , C04B35/488 , B01D53/94 , C04B35/626 , B01J37/03 , B01J37/04 , B01J23/63 , B01J23/66 , B01J35/00 , B01J35/02 , B01J37/02 , B01J23/00 , C01F17/00 , B01J37/08 , B01J37/00
摘要： A ceria-zirconia composite oxide includes at least one of lanthanum, yttrium, and praseodymium. A rate of a total content of the at least one rare earth element to a total content of cerium and zirconium is 0.1 at % to 4.0 at %. A content of the rare earth element present in near-surface regions, which are at a distance of less than 50 nm from surfaces of primary particles of the ceria-zirconia composite oxide, accounts for 90 at % or more of the total content of the rare earth element. An average particle size of the primary particles of the ceria-zirconia composite oxide is 2.2 μm to 4.5 μm. After a predetermined durability test, the intensity ratio I(14/29) of a diffraction line at 2θ=14.5° to a diffraction line at 2θ=29° and the intensity ratio I(28/29) of a diffraction line at 2θ=28.5° to the diffraction line at 2θ=29° respectively satisfy the following conditions: I(14/29)≥0.02, and I(28/29)≤0.08.
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公开(公告)号：US10913051B2
公开(公告)日：2021-02-09
申请号：US15974060
申请日：2018-05-08
发明人： Akira Morikawa , Kae Konishi , Toshitaka Tanabe , Akihiko Suda , Masahide Miura , Isao Chinzei , Hiromasa Suzuki , Akiya Chiba , Kosuke Iizuka
IPC分类号： B01J23/10 , C01G25/00 , C04B35/488 , C04B35/50 , C04B35/626 , B01J37/16 , B01J23/00 , B01J23/63 , B01J35/00 , B01J35/02 , B01J37/00 , B01D53/94 , B01J37/03 , B01J37/14 , B01J37/12 , B01J37/08
摘要： A ceria-zirconia-based composite oxide containing a composite oxide of ceria and zirconia is provided, in which primary particles having a particle diameter of 1.5 to 4.5 μm account for, on a particle number basis, at least 50% of all primary particles in the ceria-zirconia-based composite oxide, and the molar ratio of cerium to zirconium in the ceria-zirconia-based composite oxide is between 43:57 and 55:45.
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公开(公告)号：US10065179B2
公开(公告)日：2018-09-04
申请号：US14910378
申请日：2014-08-05
发明人： Akira Morikawa , Kae Konishi , Toshitaka Tanabe , Akihiko Suda , Masahide Miura , Isao Chinzei , Hiromasa Suzuki , Akiya Chiba , Kosuke Iizuka
IPC分类号： B01J23/10 , B01J37/00 , B01J37/12 , B01J37/14 , B01J37/03 , B01J23/00 , B01D53/94 , B01J37/16 , B01J23/63 , B01J35/00 , B01J35/02 , C04B35/626 , C04B35/488 , C01G25/00 , C04B35/50 , B01J37/08
摘要： A ceria-zirconia-based composite oxide containing a composite oxide of ceria and zirconia is provided, in which primary particles having a particle diameter of 1.5 to 4.5 μm account for, on a particle number basis, at least 50% of all primary particles in the ceria-zirconia-based composite oxide, and the molar ratio of cerium to zirconium in the ceria-zirconia-based composite oxide is between 43:57 and 55:45.
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公开(公告)号：US09931614B2
公开(公告)日：2018-04-03
申请号：US14897940
申请日：2014-06-12
发明人： Akira Morikawa , Kae Konishi , Toshitaka Tanabe , Akihiko Suda , Masahide Miura , Hiromasa Suzuki , Isao Chinzei , Akiya Chiba , Kosuke Iizuka
CPC分类号： B01J23/10 , B01J37/0009 , B01J37/12 , B01J37/16 , C01G25/00 , C01P2002/50 , C01P2002/74 , C01P2004/61 , C01P2006/12 , B01J2523/00 , B01J2523/3712 , B01J2523/48 , B01J2523/3706 , B01J2523/36 , B01J2523/3718
摘要： A ceria-zirconia-based composite oxide including a composite oxide containing ceria and zirconia, wherein the ceria-zirconia-based composite oxide contains at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in an amount of 0.5 to 5.0 mol % relative to a total amount of the cations contained in the ceria-zirconia-based composite oxide, where the ratio of the content of both cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in the ceria-zirconia-based composite oxide to the content of zirconium therein ([cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium]:[zirconium]) is in the range of 43:57 to 48:52 by mole ratio.
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