[PDF]     https://doi.org/10.3952/physics.2026.66.3.2

Open access article / Atviros prieigos straipsnis
Lith. J. Phys. 66, 146–153 (2026)
 

BROADBAND DIELECTRIC SPECTROSCOPY OF CALCIUM MODIFIED BaZrTiO3 RELAXOR CERAMICS
Paulius Jankauskasa, Agnieszka Wilkb, Kamil Feliksikc, Lucjan Kozielskic, Jūras Banysa, and Šarūnas Svirskasa
aFaculty of Physics, Vilnius University, Saulėtekio 3, 10257, Vilnius, Lithuania
bUniversity of Science and Technology, Faculty of Materials Science and Ceramics, al. Mickiewicza 30, 30-059 Krakow
cFaculty of Science and Technology, University of Silesia, 1A 75 Pułku Piechoty Street, 41-500 Chorzów, Poland
Email: sarunas.svirskas@ff.vu.lt

Received 8 December 2025; accepted 3 February 2026

In this work, we present the broadband dielectric spectroscopy results of Ca-modified BaZrxTi1–xO3 (x = 0.5; 0.6). The goal of the work is to understand if the relaxor ferroelectric properties of BZT are affected by the calcium substitution at the A-site of the perovskite lattice. The tolerance factor of calcium ions is below 1 so they are supposed to introduce a larger lattice distortion.
Thus, we carefully investigate two BZT (BZT50 and BZT40) compositions with 10% of calcium. To assess the influence of the substitution, we analyze the dielectric spectra and Vogel–Fulcher behaviour of mean relaxation time. This data is compared with the data of parental compositions that are available in the literature.
Keywords: relaxors, broadband dielectric spectroscopy, perovskites


KALCIU MODIFIKUOTŲ BaZrTiO3 KERAMIKŲ PLAČIAJUOSTĖ DIELEKTRINĖ SPEKTROSKOPIJA
  Paulius Jankauskasa, Agnieszka Wilkb, Kamil Feliksikc, Lucjan Kozielskic, Jūras Banysa, Šarūnas Svirskasa
aVilniaus universiteto Fizikos fakultetas, Vilnius, Lietuva
bMokslo ir technologijos universiteto Medžiagų mokslo ir keramikos fakultetas, Krokuva, Lenkija
cSilezijos universiteto Mokslo ir technologijos fakultetas, Chožuvas, Lenkija
 
Tirtos kalciu modifikuotų BaZrxTi1–xO3 (x = 0,5; 0,6) keramikų dielektrinės savybės. Darbo tikslas – išsiaiškinti, kaip netvarka perovskito gardelės A srities mazge keičia BZT dielektrines savybes. Kadangi kalcio jonų tolerancijos faktorius yra mažesnis nei 1, pakeitus bario jonus kalciu turėtų padidėti gardelės deformacija. Šiame darbe detaliai išnagrinėtos dvi BZT (BZT50 ir BZT40) kompozicijos su 10 % kalcio. Kalcio įtaka buvo vertinama nagrinėjant dielektrinius spektrus. Šie duomenys lyginami su literatūroje publikuotais BZT50 ir BZT40 keramikų tyrimų rezultatais.


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