Method for making barium titanate powder, barium titanate powder prepared by the method, dielectric ceramic compact, and monolithic ceramic capacitor
US6643118B2 · kind B2 · utility
2Cited by
1References
10Claims
0Family size
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Key dates
| Filing date | Dec 22, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Jan 21, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5481
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solid-phase method for making a barium titanate powder involves the steps of compounding powdered barium carbonate and powdered titanium oxide and calcining the mixture. The powdered barium carbonate used is needle particles having an aspect ratio of the length of the long axis to the length of the short axis of at least about 2. The powdered barium carbonate preferably has a specific surface area of about 5 m2/g or more. The resulting barium titanate powder is finer and homogeneous.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.