Systems and methods for electrically reducing ferroelectric materials to increase bulk conductivity
US7728697B2 · kind B2 · utility
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31Claims
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Key dates
| Filing date | Mar 5, 2007 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Mar 5, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
According to some embodiments, a pre-poled, single-domain body of a ferroelectric crystalline material such as lithium tantalate or lithium niobate is electrically reduced by applying a voltage across the body in a non-oxidizing environment while the body is heated to a process temperature below its Curie temperature. The voltage generates an electric field along the polar axis of the body. Electrodes may be formed on the body surface by applying an acetate-based silver paint. Exemplary methods allow achieving electrical conductivity values of 10−11 to 10−9 Siemens/cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.