Low loss tunable (Ba,Sr)TiO3 ceramics utilizing intragrain concentration gradient

Igor Lubomirsky, Tzu Yu Wang, Franco Deflaviis, Oscar M. Stafsudd

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

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 languageEnglish
Title of host publicationIntegrated Ferroelectrics
PublisherGordon & Breach Science Publ Inc
Pages319-326
Number of pages8
Volume24
Edition1
Publication statusPublished - 1999
EventThe 11th International Symposium on Integrated Ferroelectrics (ISIF99) - Colorado Springs, CO, USA
Duration: Mar 7 1999Mar 10 1999

Other

OtherThe 11th International Symposium on Integrated Ferroelectrics (ISIF99)
CityColorado Springs, CO, USA
Period3/7/993/10/99

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics

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  • Cite this

    Lubomirsky, I., Wang, T. Y., Deflaviis, F., & Stafsudd, O. M. (1999). Low loss tunable (Ba,Sr)TiO3 ceramics utilizing intragrain concentration gradient. In Integrated Ferroelectrics (1 ed., Vol. 24, pp. 319-326). Gordon & Breach Science Publ Inc.