Exhaust-Gas-Purification Catalyst Carrier
US-2015209760-A1 · Jul 30, 2015 · US
Ceria-zirconia complex oxide material and method for producing same
US9751075B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9751075-B2 |
| Application number | US-201514738384-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 12, 2015 |
| Priority date | Jun 26, 2014 |
| Publication date | Sep 5, 2017 |
| Grant date | Sep 5, 2017 |
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Abstract
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A satisfactory oxygen storage material and a method for producing it are provided. The oxygen storage material comprises zirconia particles with a ceria-zirconia complex oxide supported on the zirconia particles. The ceria-zirconia complex oxide includes a pyrochlore phase and has a mean crystallite diameter of 10 nm to 22.9 nm.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for producing an oxygen storage material, the oxygen storage material comprising: zirconia particles and a ceria-zirconia complex oxide supported on the zirconia particles, wherein the ceria-zirconia complex oxide includes a pyrochlore phase and has a mean crystallite diameter of 10 nm to 22.9 nm, the method comprising the following steps in order: (i) a step of preparing an aqueous solution containing: a water-soluble cerium salt, a water-soluble zirconium salt or oxyzirconium salt, a complexing agent that is an alkylcarboxylic acid and/or an alkylcarboxylic acid salt, and zirconia particles, (ii) adding an aqueous alkali solution to the aqueous solution of (i), (iii) holding the aqueous solution mixture of (ii) at a temperature of 180° C. to 220° C. for 0.5 hours to 72 hours to produce a solid product by precipitation, (iv) holding the solid product at a temperature of 500° C. to 700° C. for 1 hour to 5 hours and then at a temperature of 700° C. to 1100° C. for 1 hour to 5 hours, and (v) further subjecting the solid product to temperature-programmed reduction treatment.
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Classifications
Dimensions · CPC title
with rare earths or actinides · CPC title
Oxidising · CPC title
two phases having the same anion, e.g. both oxidic phases · CPC title
Gold · CPC title
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Frequently asked questions
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- What does patent US9751075B2 cover?
- A satisfactory oxygen storage material and a method for producing it are provided. The oxygen storage material comprises zirconia particles with a ceria-zirconia complex oxide supported on the zirconia particles. The ceria-zirconia complex oxide includes a pyrochlore phase and has a mean crystallite diameter of 10 nm to 22.9 nm.
- Who is the assignee on this patent?
- Toyota Motor Co Ltd, Nat Univ Corp Nagoya Univ
- What technology area does this patent fall under?
- Primary CPC classification B01J23/10. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 05 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).