Quaternary piezoelectric ceramics with ultra-high mechanical quality factor

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-07-09 DOI:10.1016/j.materresbull.2024.112995

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Abstract

The development of piezoelectric ceramics with large piezoelectric coefficient (d₃₃), high Curie temperature (T_C) and high mechanical quality factor (Q_m) is still a key challenge for practical application for high-power device. Herein, a novel quaternary piezoelectric ceramics of (0.125-x) Pb_0.98Sr_0.02(Mg_1/3Nb_2/3)O₃–0.445PbTiO₃–0.43PbZrO₃-xPb(Mn_1/3Nb_2/3)O₃ (abbreviated as xPMnN-PSMN-PZT) were prepared by the solid-state sintering method. The hard dopant PMnN induced the morphotropic phase boundary (MPB) of PSMN-PZT into a tetragonal-rich region. In addition, the XPS and EPR analysis proved the existence of a large amount of oxygen vacancies ( $V_{o}^{• •}$ ) in PMnN-PSMN-PZT ceramic system. The composition near tetragonal-rich MPB region and the appearance of defect dipoles formed a strong coupling effect on the domain wall motion and leaded to an ultra Q_m value. The optimum piezoelectric properties were achieved at x = 9 mol% with d₃₃ = 260 pC/N, Q_m = 3880, tanδ = 0.009 and T_C = 332 °C. A significant internal bias field (E_bias) of 8.83 kV/cm was also observed in 0.09PMnN-PSMN-PZT ceramics. The origin of this excellent piezoelectric properties was explained by the phase structure, piezoelectric and dielectric analysis. This work demonstrated a rational strategy to obtain ultra Q_m value for high-power piezoceramics.

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具有超高机械品质因数的四元压电陶瓷

开发具有大压电系数（d33）、高居里温度（TC）和高机械品质因数（Qm）的压电陶瓷仍是大功率器件实际应用的关键挑战。本文采用固态烧结法制备了 (0.125-x) Pb0.98Sr0.02(Mg1/3Nb2/3)O3-0.445PbTiO3-0.43PbZrO3-xPb(Mn1/3Nb2/3)O3（简称 xPMnN-PSMN-PZT）的新型四元压电陶瓷。硬掺杂剂 PMnN 诱导 PSMN-PZT 的各向异性相界（MPB）进入富四方区域。此外，XPS和EPR分析证明了PMnN-PSMN-PZT陶瓷体系中存在大量氧空位（Vo--）。富四方 MPB 区附近的成分和缺陷偶极子的出现对畴壁运动形成了强烈的耦合效应，并导致了超 Qm 值。在 x = 9 mol%、d33 = 260 pC/N、Qm = 3880、tanδ = 0.009 和 TC = 332 °C 时，压电特性达到最佳。在 0.09PMnN-PSMN-PZT 陶瓷中还观察到了 8.83 kV/cm 的显著内部偏压场 (Ebias)。相结构、压电和介电分析解释了这种优异压电特性的来源。这项工作展示了获得大功率压电陶瓷超 Qm 值的合理策略。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.