Bi-layer oxide ferroelectrics
US5914068A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1996 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/453
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Novel Bi-layer Perovskite ferroelectrics constituted of BiO intermediate layers (17) and pseudo-Perovskite layers (18) stacked alternately are disclosed. The Bi-layer Perovskite ferroelectrics have such a crystal structure which has a fundamental skeleton composed of each intermediate layer (17) consisting of one BiO plane and each pseudo-Perovskite structure (18) consisting of Pb(Zr, Ti)O.sub.3. Since the intermediate layer (17) is constituted of the BiO layer, the ferroelectrics are more excellent in ferroelectric characteristics and thermodynamic stability than known Perovskite ferroelectrics comprising a Bi.sub.2 O.sub.2 layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.