Abstract
The miniaturization of electronic devices has led to a need for tunable dielectric materials. These materials must exhibit high tunability and low loss in the microwave region. We observed high tunability and low loss throughout the microwave region, from .3 MHz to 3 GHz, in (Ba,Sr)TiO3 ceramics with intragrain concentration gradients. The tunability varied slightly with frequency and was measured to be approx. 10% at 3 GHz under 10kV/cm bias and the loss tangent remained virtually unchanged, below .02 in this region. Our data is consistent with the theory of ion hopping clusters. The graded composition results in suppression of ferroelectric resonance and thus dispersion of peak dielectric loss. The concept of intragrain concentration gradient materials can lead to a variety of applications in the microwave communications field.
| Original language | English |
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| Title of host publication | Integrated Ferroelectrics |
| Publisher | Gordon & Breach Science Publ Inc |
| Pages | 319-326 |
| Number of pages | 8 |
| Volume | 24 |
| Edition | 1 |
| Publication status | Published - 1999 |
| Event | The 11th International Symposium on Integrated Ferroelectrics (ISIF99) - Colorado Springs, CO, USA Duration: Mar 7 1999 → Mar 10 1999 |
Other
| Other | The 11th International Symposium on Integrated Ferroelectrics (ISIF99) |
|---|---|
| City | Colorado Springs, CO, USA |
| Period | 3/7/99 → 3/10/99 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics