Fabrication and dielectric properties of phase-pure Ba2Ti9O20 microwave resonators

Wen Yi Lin, Rosario A. Gerhardt, Robert F. Speyer, Wesley S. Hackenberger, Thomas R. Shrout

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


The thermal processing schedules necessary to form phase pure Ba2Ti9O20, with and without substitutional solid solution were investigated. Undoped compositions formed the compound most easily under rapid (500 °C/min) heating rates, where diffusional agglomeration of the TiO2 batch constituent was minimized. The compound formed most easily with minor (0.82%) substitutions of SnO2 and ZrO2 for TiO2. The solubility of Sn in Ba2Ti9O20 was higher than that of Zr. Extended heat treatment (16 vs. 6 h at 1390 °C) resulted in volitalization of grain boundary liquid phase, leading to a more porous and slightly degraded resonators. The effects of dopant concentrations and soak periods at 1390 °C on dielectric constants and temperature-dependent quality factors are reported.

Original languageEnglish (US)
Pages (from-to)501-506
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 1997
EventProceedings of the 1996 MRS Fall Symposium - Boston, MA, USA
Duration: Dec 2 1996Dec 5 1996

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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