Nanocrystal-sized cerium-zirconium-aluminum oxide material and method of making the same

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12227428
APP PUB NO 20220064017A1
SERIAL NO

17422770

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A nanocrystal-sized cerium-zirconium-aluminum mixed oxide material includes at least 20% by mass zirconium oxide; between 5% to 55% by mass cerium oxide; between 5% to 60% by mass aluminum oxide; and a total of 25% or less by mass of at least one oxide of a rare earth metal selected from the group of lanthanum, neodymium, praseodymium, or yttrium. The nanocrystal-sized cerium-zirconium-aluminum mixed oxide exhibits hierarchically ordered aggregates having a dso particle size less than 1.5 μm, and retains at least 80% of surface area and pore volume after ageing at temperature higher than 1000° C. for at least 6 hours. The nanocrystal-sized cerium-zirconium-aluminum mixed oxide material is prepared using a co-precipitation method followed by milling the dried and calcined oxide material. The nanocrystal-sized cerium-zirconium-aluminum mixed oxide material forms a particulate filter that may be used in an exhaust system arising from a gas or diesel engine.

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Patent Owner(s)

  • PACIFIC INDUSTRIAL DEVELOPMENT CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bortun, Anatoly Ypsilanti, US 18 8
Bortun, Mila Ypsilanti, US 6 4
Cho, Jin Utsunomiya, JP 30 434
Li, Yunkui Ann Arbor, US 27 31
Shepard, David Canton, US 33 227

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