Enhancing Dielectric and Ferroelectric Properties in PFN–PT Ceramics via (Ca,Sr)ZrO3 Modification for Advanced Electronic Applications

jafari fesharaki, marjaneh

doi:10.22068/ijmse.4601

Volume 23, Issue 3 (September 2026) IJMSE 2026, 23(3): 76-88 | Back to browse issues page

‎ 10.22068/ijmse.4601

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jafari fesharaki M. Enhancing Dielectric and Ferroelectric Properties in PFN–PT Ceramics via (Ca,Sr)ZrO3 Modification for Advanced Electronic Applications. IJMSE 2026; 23 (3) :76-88
URL: http://ijmse.iust.ac.ir/article-1-4601-en.html

Enhancing Dielectric and Ferroelectric Properties in PFN–PT Ceramics via (Ca,Sr)ZrO3 Modification for Advanced Electronic Applications

Marjaneh Jafari fesharaki

Abstract: (3534 Views)

The structural, dielectric, and ferroelectric properties of (1−x)PFN–PT/x(Ca,Sr)ZrO₃ ceramics (x = 0–0.08) were systematically investigated. X-ray diffraction analysis confirmed the formation of a single-phase perovskite structure, while Rietveld refinement revealed a gradual reduction in the monoclinic lattice distortion with increasing CZ and SZ contents, indicating structural evolution toward a pseudocubic-like state near the morphotropic phase boundary (MPB). Quantitative FE-SEM analysis showed dense microstructures with progressive grain refinement at higher modifier concentrations. Temperature-dependent dielectric measurements exhibited the highest dielectric constant for the x = 0.04 compositions, whereas the modified Curie–Weiss analysis confirmed diffuse phase transition and relaxor behavior, with γ values of 1.94 and 1.68 for PFN–PT:0.04CZ and PFN–PT:0.04SZ, respectively. Room-temperature ferroelectric measurements yielded maximum remanent polarization (P_r) values of 24.32 and 34.26 μC cm⁻² for the CZ- and SZ-modified ceramics at x = 0.04. The enhanced dielectric and ferroelectric properties are closely correlated with the reduced monoclinic distortion near the MPB, highlighting the crucial role of structural optimization in improving the functional performance of PFN–PT-based ceramics.

Keywords: PFN-PT ceramics, CaZrO₃/SrZrO₃ modification, Morphotropic phase boundary (MPB), Dielectric and ferroelectric properties, Relaxor ferroelectrics.