Improved piezoelectric performance of PbNb2O6-based ceramics via K+ modification

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of The European Ceramic Society Pub Date : 2025-01-08 DOI:10.1016/j.jeurceramsoc.2025.117193

Da Huang , Cheng Liu , Qin Yu , Hengrui Wang , Hongxi Chen , Dainan Zhang , Huaiwu Zhang

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Abstract

In this study, dense Pb_(1-x)K_2x[Nb_0.96Ta_0.04]₂O₆ (PKxNT, x = 0.05, 0.10, 0.15, 0.20) ceramics were prepared via the solid-state reaction method. It was discovered that the A-site vacancies filled by K⁺ induced the conversion of the tetragonal tungsten bronze (TTB) structure from “unfilled” to “filled”. Two kinds of orthorhombic ferroelectric phases were indexed from the XRD profiles. The grain morphology was transformed from equiaxed to columnar and the diffuse phase transition (DPT) behavior was observed. Improved piezoelectric performance (d₃₃ = 141 pC/N) and reduced dielectric loss (tanδ = 0.009) were obtained in the sample of PbK_0.20NT. It is suggested that the strategy of K⁺/Ta⁵⁺ co-substitution could greatly improve the piezoelectric properties of the PbNb₂O₆-based ceramic, which is promising for expanding its application scenarios.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.