Microwave properties of Ba 2Ti 9O 20 doped with zirconium and tin oxides

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

Research output: Contribution to journalArticle

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Abstract

The effects of solid-solution additives, their concentration, and the thermal processing schedule on the microstructure evolution and microwave properties of Ba 2Ti 9O 20 were studied. The solubility of tin in Ba 2Ti 9O 20 was higher than that of zirconium. Both elements facilitated the formation of phase-pure Ba 2Ti 9O 20 resonators. Ba 2Ti 9O 20 formed most easily with low dopant concentrations (0.82 mol%) (most impressively for ZrO 2 substitutions). Extended heat treatment (16 h versus 6 h at a temperature of 1390°C) resulted in volatilization of the grain-boundary liquid phase, which leads to more-porous resonators that have correspondingly lower permittivities. Increasing the dopant concentration resulted in minor increases in the quality factor; doping with zirconium led to slightly higher values (a maximum of 13900 at a frequency of 3 GHz). Increasing the measurement temperature degraded the quality factor (most precipitously for BaTi 4O 9). The temperature coefficient decreased as the ZrO 2 substitution increased but was largely unaffected by the SnO 2 concentration. Excess TiO 2 in a batch with no other dopants demonstrated degraded microwave properties.

Original languageEnglish (US)
Pages (from-to)1207-1211
Number of pages5
JournalJournal of the American Ceramic Society
Volume82
Issue number5
StatePublished - Dec 1 1999

Fingerprint

Tin oxides
tin
Zirconia
Microwaves
Doping (additives)
oxide
substitution
Zirconium
Resonators
Substitution reactions
permittivity
temperature
grain boundary
volatilization
solid solution
Tin
microstructure
solubility
Vaporization
Temperature measurement

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

Lin, W. Y., Speyer, R. F., Hackenberger, W. S., & Shrout, T. R. (1999). Microwave properties of Ba 2Ti 9O 20 doped with zirconium and tin oxides. Journal of the American Ceramic Society, 82(5), 1207-1211.
Lin, Wen Yi ; Speyer, Robert F. ; Hackenberger, Wesley S. ; Shrout, Thomas R. / Microwave properties of Ba 2Ti 9O 20 doped with zirconium and tin oxides. In: Journal of the American Ceramic Society. 1999 ; Vol. 82, No. 5. pp. 1207-1211.
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Lin, WY, Speyer, RF, Hackenberger, WS & Shrout, TR 1999, 'Microwave properties of Ba 2Ti 9O 20 doped with zirconium and tin oxides', Journal of the American Ceramic Society, vol. 82, no. 5, pp. 1207-1211.

Microwave properties of Ba 2Ti 9O 20 doped with zirconium and tin oxides. / Lin, Wen Yi; Speyer, Robert F.; Hackenberger, Wesley S.; Shrout, Thomas R.

In: Journal of the American Ceramic Society, Vol. 82, No. 5, 01.12.1999, p. 1207-1211.

Research output: Contribution to journalArticle

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Lin WY, Speyer RF, Hackenberger WS, Shrout TR. Microwave properties of Ba 2Ti 9O 20 doped with zirconium and tin oxides. Journal of the American Ceramic Society. 1999 Dec 1;82(5):1207-1211.