Effect of ZnO doping on (K,Na)NbO3-based lead-free piezoceramics: Enhanced ferroelectric and piezoelectric performance

Wang, Ke; Liu, Yixuan; Thong, Hao‐Cheng; Du, Zhaohui; Li, Zhao; Zhu, Zhixiang; Nie, Jianguo; Geng, Jinfeng; Gong, Wen

doi:10.1016/j.jallcom.2020.155936

Cited by 23 publications

(11 citation statements)

References 45 publications

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“…The ε r of the undoped ceramic is 2606, while it increases to 3432 when x = 0.003, as detailed in Figure 4(B). This work obtained high piezoelectric coefficient ( d 33 = 536 pC/N) and dielectric constant ( ε r = 3432) simultaneously in KNN‐based ceramics, as shown in Figure 5 19,28,41–54 . Conductivity and domain wall motion are the main factors controlling tan δ 55 .…”

Section: Resultsmentioning

confidence: 65%

“…This work obtained high piezoelectric coefficient (d 33 = 536 pC/N) and dielectric constant (ε r = 3432) simultaneously in KNN-based ceramics, as shown in Figure 5. 19,28,[41][42][43][44][45][46][47][48][49][50][51][52][53][54] Conductivity and domain wall motion are the main factors controlling tan δ 55 . The tan δ is further reduced by a small amount of Fe 3+ and In 3+ , indicating that the conductivity of the ceramics is also low, as seen in Figure S1 and Table S1.…”

Section: Resultsmentioning

confidence: 99%

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High piezoelectric and dielectric constant of Fe/In Co‐doped KNN‐based ceramics regulated by lattice distortion

Leng

Wan

Liu

et al. 2023

Int J Applied Ceramic Tech

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The new (0.96‐x)(K0.48Na0.52Nb0.96Sb0.04)O3‐0.04(Bi0.5Ag0.5)ZrO3‐x(Fe2O3‐In2O3) ceramics with high dielectric, and electromechanical coupling properties were designed. In this work, the effect of KNN‐based ceramics lattice distortion (c/a) and microstructure on the electrical properties was explored by varying the doping amount of Fe3+ and In3+. The problem of a large number of oxygen vacancies generated by the volatilization of K and Na can be well solved by introducing Fe3+ and In3+. The bulk density increases significantly and the maximum value is about 4.52 g/cm3.The sample with x = 0.003 has the smallest c/a, and exhibits the best piezoelectric and dielectric properties (d33 = 536 pC/N, εr = 3432 and kp = 55.8 %). Low doping concentration of Fe2O3 is considered a “soft” addition for KNN‐based piezoelectric ceramics. The study of this mechanism provides a new idea to regulate the electrical performance of KNN‐based ceramics.

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Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

High piezoelectric and dielectric constant of Fe/In Co‐doped KNN‐based ceramics regulated by lattice distortion

Leng

Wan

Liu

et al. 2023

Int J Applied Ceramic Tech

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“…Predictably, texture engineering could also be an effective method to improve the small-signal properties of LNN ceramics, which is quite important for nonresonant applications, such as acceleration sensors. Defect engineering is a feasible way to tailor the electrical properties of perovskite piezoelectric by donor/acceptor doping [118][119][120][121]. The defects induced by chemical doping could also possess a similar effect on LNN ceramics, which would give rise to a remarkable improvement in piezoelectric performance.…”

Section: Possible Solutionsmentioning

confidence: 99%

Sodium lithium niobate lead-free piezoceramics for high-power applications: Fundamental, progress, and perspective

LI¹,

Li²,

Juan³

et al. 2023

Journal of Advanced Ceramics

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With the capability of interconversion between electrical and mechanical energy, piezoelectric materials have been revolutionized by the implementation of perovskite-piezoelectric-ceramic-based studies over 70 years. In particular, the market of piezoelectric ceramics has been dominated by lead zirconate titanate for decades. Nowadays, the research on piezoelectric ceramics is largely driven by cutting-edge technological demand as well as the consideration of a sustainable society. Hence, environmental-friendly lead-free piezoelectric materials have emerged to replace lead-based Pb(Zr,Ti)O 3 (PZT) compositions. Owing to the inherent high mechanical quality factor (Q m ) and low energy loss, (Li,Na)NbO 3 (LNN) materials have recently drawn increasing attention and brought advantages to high-power piezoelectric applications. Although the crystallographic structures of LNN materials were intensively investigated for decades, the technical strategies for electrical performance are still limited. As a result, the property enhancement appears to have approached a plateau. This review traces the progress in the development of LNN materials, starting from the polymorphism in terms of the crystal structures, phase transitions, and local structural distortions. Then, the key milestone works on the functional tunability of LNN are reviewed with emphasis on involved engineering approaches. The exceptional performance at a large vibration velocity makes LNN ceramics promising for high-power applications, such as ultrasonic welding (UW) and ultrasonic osteotomes (UOs). The remaining challenges and some strategic insights for synergistically engineering the functional performance of

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“…at the A-site and Sb, Zr, Hf, etc. in the B-site of KNN, excellent piezoelectric properties comparable to those of PZT-based ceramics are obtained because of the coexistence of rhombohedral and tetragonal phases [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Grain Growth Behavior and Electrical Properties of 0.96(K0.46−xNa0.54−x)Nb0.95Sb0.05O3–0.04Bi0.5(Na0.82K0.18)0.5ZrO3 Ceramics

et al. 2022

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This study investigated the causes of microstructural changes and the resultant electrical properties according to the sintering temperature of 0.96(K0.46−xNa0.54−x)Nb0.95Sb0.05O3-0.04Bi0.5(Na0.82K0.18)0.5ZrO3 lead-free ceramics by analyzing the correlation between vacancy concentrations and 2D nucleation. When sintered for 4 h, no grain growth occurred for the x = 0.000 composition over a wide temperature range, demonstrating that the existence of initial vacancies is essential for grain growth. As x increased, that is, as the vacancy concentration increased, the critical driving force (ΔGC) for 2D nucleation decreased, and abnormal grain growth was promoted. The number and size of these abnormal grains increased as the sintering temperature increased, but at sintering temperatures above 1100 °C, they decreased again owing to a large drop in ΔGC. The x = 0.005 specimen sintered at 1085 °C exhibited excellent piezoelectric properties of d33 = 498 pC/N and kp = 0.45 due to the large number of large abnormal grains with an 83% tetragonal phase fraction. The x = 0.000 specimen sintered at 1130 °C with suppressed grain growth exhibited good energy storage properties because of its very high relative density and small grain size of 300 to 400 nm.

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Effect of ZnO doping on (K,Na)NbO3-based lead-free piezoceramics: Enhanced ferroelectric and piezoelectric performance

Cited by 23 publications

References 45 publications

High piezoelectric and dielectric constant of Fe/In Co‐doped KNN‐based ceramics regulated by lattice distortion

High piezoelectric and dielectric constant of Fe/In Co‐doped KNN‐based ceramics regulated by lattice distortion

Sodium lithium niobate lead-free piezoceramics for high-power applications: Fundamental, progress, and perspective

Grain Growth Behavior and Electrical Properties of 0.96(K0.46−xNa0.54−x)Nb0.95Sb0.05O3–0.04Bi0.5(Na0.82K0.18)0.5ZrO3 Ceramics

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