Ceria-zirconia-based composite oxide and method for producing same, and exhaust gas purification catalyst including ceria-zirconia-based composite oxide
US10913051B2 · kind B2 · utility
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Key dates
| Filing date | May 8, 2018 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | May 8, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.