Materials (Feb 2022)

Microwave and Terahertz Properties of Spark-Plasma-Sintered Zr<sub>0.8</sub>Sn<sub>0.2</sub>TiO<sub>4</sub> Ceramics

  • Liviu Nedelcu,
  • Mihail Burdusel,
  • Mihai Alexandru Grigoroscuta,
  • Cezar Dragos Geambasu,
  • Monica Enculescu,
  • Petre Badica,
  • Marian Gabriel Banciu

DOI
https://doi.org/10.3390/ma15031258
Journal volume & issue
Vol. 15, no. 3
p. 1258

Abstract

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Zr0.8Sn0.2TiO3 (ZST) powders synthesized by solid-state reaction were subject to processing by spark plasma sintering (SPS). A single-phase ceramic with a high relative density of 95.7% and 99.6% was obtained for sintering temperatures of 1150 °C and 1200 °C, respectively, and for a dwell time of 3 min. In order to reduce the oxygen vacancies, as-sintered discs were annealed in air at 1000 °C. The dielectric loss of the annealed samples, expressed by the Q × f product, measured in the microwave (MW) domain, varied between 35 THz and 50 THz. The intrinsic losses (Q × f ~ 60 THz) were derived by using terahertz time-domain spectroscopy (THz-TDS).

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