Calcium titanate powder, method for producing same and external toner additive for electrophotography
US12084354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2019 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Apr 26, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A powder which is composed of particles that are mainly composed of calcium titanate having a perovskite crystal structure, and primary particles of which have a generally spherical shape and an average particle diameter within the range of from 20 nm to 100 nm (inclusive). This powder is produced by a method which comprises: the production of calcium titanate by subjecting a mixed liquid that contains a sugar, an alkali, a water-soluble compound containing calcium, and a compound which is obtained by deflocculating a hydrolysis product of a titanium compound with use of a monobasic acid to a high-pressure liquid-phase reaction that includes heating to a temperature of from 100° ° C. to 270° C. (inclusive),; and a subsequent calcium removal treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.