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<p>Piezoelectric ceramics with high mechanical quality factor <i>Q</i><sub>m</sub> and high piezoelectric coefficient <i>d</i><sub>33</sub> are urgently demanded for electromechanical applications, yet these two parameters are mutually restrictive. Here, MnCO<sub>3</sub> is introduced as an acceptor dopant into Pb(Ni<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>-Pb(In<sub>1/2</sub>Nb<sub>1/2</sub>)O<sub>3</sub>-PbTiO<sub>3</sub> piezoceramic with the tetragonal (T)-phase-rich morphotropic phase boundary (MPB). Mn doping generates defect dipoles that pin domain walls and suppress non-180° domain motion, thereby significantly enhancing <i>Q</i><sub>m</sub>. Meanwhile, the Mn-induced local random field disrupts the long-range ferroelectric order, forming a heterogeneous domain configuration comprising lamellar, micro-, and stripe-like domains. This multi-scale domain structure together with the presence of MPB maintains high piezoelectric activity. Consequently, the ceramic achieves optimized piezoelectric properties: <i>d</i><sub>33</sub> = 545 pC/N, <i>Q</i><sub>m</sub> = 574, <i>k</i><sub>p ​</sub> = 0.53 and <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({d}_{33}^{*}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mi>d</mi> <mrow> <mn>33</mn> </mrow> <mrow> <mrow /> <mo>∗</mo> </mrow> </mmultiscripts> </math></EquationSource> </InlineEquation>= 885&#xa0;pm/V. This work provides an effective strategy for designing piezoceramics with both high <i>d</i><sub>33</sub> and high <i>Q</i><sub>m</sub> for high-power applications.</p> Graphical abstract <p></p>

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High piezoelectric performance in piezoceramics via synergistic effects of defect engineering and domain modulation

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Chenyu Jia,
  • Yihang Xu,
  • Jie Wu,
  • He Qi

摘要

Piezoelectric ceramics with high mechanical quality factor Qm and high piezoelectric coefficient d33 are urgently demanded for electromechanical applications, yet these two parameters are mutually restrictive. Here, MnCO3 is introduced as an acceptor dopant into Pb(Ni1/3Nb2/3)O3-Pb(In1/2Nb1/2)O3-PbTiO3 piezoceramic with the tetragonal (T)-phase-rich morphotropic phase boundary (MPB). Mn doping generates defect dipoles that pin domain walls and suppress non-180° domain motion, thereby significantly enhancing Qm. Meanwhile, the Mn-induced local random field disrupts the long-range ferroelectric order, forming a heterogeneous domain configuration comprising lamellar, micro-, and stripe-like domains. This multi-scale domain structure together with the presence of MPB maintains high piezoelectric activity. Consequently, the ceramic achieves optimized piezoelectric properties: d33 = 545 pC/N, Qm = 574, kp ​ = 0.53 and \({d}_{33}^{*}\) d 33 ∗ = 885 pm/V. This work provides an effective strategy for designing piezoceramics with both high d33 and high Qm for high-power applications.

Graphical abstract