Composite oxides of A-site defect type perovskite structure as catalysts
US6060420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/525
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A novel composite oxide has an A-site defect type perovskite structure represented by a general formula: EQU A.sub.1--.alpha. BO.sub.3--.delta. wherein A is at least one element selected from the group consisting of alkali metals, alkaline earth metals, rare earth elements, Y and Pb, and B is at least one element selected from the group consisting of Ti, Mn, Fe, Co, Ni, Cu and Al, and .alpha. is 0<.alpha.<0.2 and .delta. is 0.ltoreq..delta..ltoreq.1, provided that only a known perovskite type oxide (La.sub.1-x Sr.sub.x).sub.1-.alpha. MnO.sub.3-.delta. (when .alpha. is 0.06, x is 0.08.ltoreq.x.ltoreq.0.30, while when the value of x is 0.11, .alpha. is 0.06<.alpha.<0.11) is excluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.