Zirconia-based aqueous np-dispersion for use in coating filter substrates
US11980869B2 · kind B2 · utility
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20References
20Claims
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Key dates
| Filing date | Dec 2, 2019 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Jan 10, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to an aqueous dispersion of particles, the dispersion having a particle content of 10-70 wt %, and the particles comprising, on an oxide basis: (a) 10-98 wt % in total of ZrO2+HfO2, and (b) 2-90 wt % in total of Al2O3, CeO2, La2O3, Nd2O3, Pr6O11, Y2O3, or a transition metal oxide, wherein the dispersion has a Z-average particle size of 100-350 nm and the particles have a crystallite size of 1-9 nm. The invention also relates to a substrate coated with the aqueous dispersion of particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.