Low-losses, highly tunable Ba0.6Sr0.4TiO3/MgO composite.
- Resource Type
- Article
- Authors
- Chung, U.-Chan; Elissalde, C.; Maglione, M.; Estournès, C.; Paté, M.; Ganne, J. P.
- Source
- Applied Physics Letters. 1/28/2008, Vol. 92 Issue 4, p042902. 3p. 1 Diagram, 3 Graphs.
- Subject
- *SINTERING
*HIGH pressure (Technology)
*ISOSTATIC pressing
*BULK solids
*INDUSTRIAL chemistry
- Language
- ISSN
- 0003-6951
Spark plasma sintering (SPS) is an efficient tool to obtain highly densified ferroelectric-dielectric ceramic composites with clean interfaces and tunable properties. Dielectric MgO and ferroelectric Ba0.6Sr0.4TiO3 (BST) were combined in two-dimensional multilayer and three-dimensional random powders design. Their unmodified BST Curie temperature proves the suppression of interdiffusion while dielectric losses are below 0.5% and the tunability is 40% at room temperature. The composites and pure BST with similar densities (>95%) were obtained, owing reliable comparison of their dielectric properties. Such SPS ceramics can be used as experimental input for simulation and are potential candidates for high frequency applications. [ABSTRACT FROM AUTHOR]