Journal of Advanced Dielectrics, Volume. 14, Issue 6, 2450001(2024)

Novel high-performance 2–1–2 composites with two ferroelectric components causing a variable anisotropy of figures of merit

Vitaly Yu. Topolov* and Sofya A. Kovrigina
Author Affiliations
  • Department of Physics,Southern Federal University,5 Zorge Street,Rostov-on-Don 344090,Russia
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    A high performance of novel three-component composites with 2–1–2 connectivity is reported and discussed. Layers of the composites are parallel-connected,and each layer contains the ferroelectric (FE) component. The layer of the first type (LFT) represents domain-engineered single crystal poled along either [0 0 1] or [0 1 1]. The layer of the second type is described as a system of long FE ceramic rods that have the shape of an elliptic cylinder and are aligned in a polymer medium. Piezoelectric coefficients d3j and g3j and sets of figures of merit (FOM) (energy-harvesting d3jg3j,modified F3jσ for a stress-driven harvester and modified F3jξ for a strain-driven harvester) are analyzed to show their large values and specifics of the anisotropy when varying volume fractions of components and a rotation angle of the ceramic rod bases. For the first time,the studied parameters are compared in two directions: (i) the composite based on [0 0 1]-poled single crystal versus the composite based on [0 1 1]-poled single crystal and (ii) the lead-free composite versus the lead-containing composite (both based on [0 0 1]-poled single crystals). The advantages of the high-performance lead-free composite are discussed. The 2–1–2 composites put forward in this paper are of interest as advanced materials suitable for piezoelectric sensors,actuators and energy-harvesting systems operating at constant stress or strain.

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    Vitaly Yu. Topolov, Sofya A. Kovrigina. Novel high-performance 2–1–2 composites with two ferroelectric components causing a variable anisotropy of figures of merit[J]. Journal of Advanced Dielectrics, 2024, 14(6): 2450001

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    Paper Information

    Category: Research Articles

    Received: Nov. 27, 2023

    Accepted: Jan. 30, 2024

    Published Online: Jan. 14, 2025

    The Author Email: Yu. Topolov Vitaly (vutopolov@sfedu.ru)

    DOI:10.1142/S2010135X24500012

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