Enhanced thermal and cycling reliabilities in (K,Na)(Nb,Sb)O3-CaZrO3-(Bi,Na)HfO3 ceramics

Yang, Fan; Wang, Zhenxing; Huan, Yu; Wei, Tao; Wang, Xiaohui

doi:10.1007/s40145-020-0374-9

Cited by 15 publications

(4 citation statements)

References 47 publications

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“…[ 1–4 ] Dielectric capacitors have attracted considerable attention in many pulsed power systems due to their high power density, fast charge/discharge speed, and excellent fatigue resistance, in contrast to other electrical energy storage devices such as lithium batteries, fuel cells, and supercapacitors. [ 5–8 ] However, the low energy storage density and/or efficiency of dielectric capacitors significantly limit their development and application. Therefore, exploiting novel dielectric capacitors with high energy storage performance has attracted widespread concern.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Storage Density and Efficiency of Lead‐Free Dielectrics with Sandwich Structure

Yan,

Qian,

Lin

et al. 2023

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Lead‐free dielectric capacitors have attracted significant research interest for high‐power applications due to their environmental benefits and ability to meet the demanding performance requirements of electronic devices. However, the development of lead‐free ceramic dielectrics with outstanding energy storage performance remains a challenge. In this study, environmentally friendly ceramic dielectrics with sandwich structures are designed and fabricated to improve energy storage performance via the synergistic effect of different dielectrics. The chemical compositions of the outer and middle layers of the sandwich structure are 0.35BiFeO3‐0.65SrTiO3 and Bi0.39Na0.36Sr0.25TiO3, respectively. The experimental and theoretical simulation results demonstrate that the breakdown strength is over 700 kV cm−1 for prepare sandwich structure ceramics. As a result, an ultrahigh recoverable energy storage density of 9.05 J cm−3 and a near‐ideal energy storage efficiency of 97% are simultaneously achieved under 710 kV cm−1. Furthermore, the energy storage efficiency maintains high values (≥ 96%) within 1–100 Hz and the power density as high as 188 MW cm−3 under 400 kV cm−1. These results indicate that the designed lead‐free ceramics with a sandwich structure possess superior comprehensive energy storage performance, making them promising lead‐free candidates in the energy storage field.

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Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Storage Density and Efficiency of Lead‐Free Dielectrics with Sandwich Structure

Yan,

Qian,

Lin

et al. 2023

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“…Considering the lead toxicity to both the environment and human beings, various regulations aiming to limit the use of lead worldwide motivated researchers to find lead-free alternatives, with BaTiO 3 (BT), Na 0.5 Bi 0.5 TiO 3 (BNT), and (Na,K)NbO 3 (KNN)-based piezoelectric ceramics as the primary competitors [8][9][10][11][12]. Acceptor doping is the well-established strategy for hardening the electromechanical properties of these compositions, where the induced asymmetrically-distributed charged point defects pin domain walls, and thus improve Q m .…”

Section: Introductionmentioning

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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“…High ε r dielectrics are preferred for capacitors and there are some promising lead-based ceramics that have a high ε r value in the range of 10,000-25,000, such as Pb(Fe 1/3 W 2/3 )O 3 , Pb(Mg 1/3 Nb 2/3 )O 3 and Pb(Zn 1/3 Nb 2/3 )O 3 but lead is considered toxic and hazardous to human health [16][17][18][19][20][21][22][23]. Therefore, the use of lead is constrained by the European Union.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermal Stability in Dielectric Properties of NaNbO3–Modified BaTiO3–BiMg1/2Ti1/2O3 Ceramics for X9R-MLCC Applications

et al. 2022

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0.5BaTiO3–(0.5 − x)BiMg1/2Ti1/2O3−xNaNbO3 (x = 0.10–0.30) ceramics were processed via a conventional solid state sintering route. X-ray diffraction analysis and Raman spectroscopy showed the formation of a cubic perovskite structure. Microstructural analysis of the samples revealed densely packed grains. The addition of NaNbO3 resulted in the enhancement in dielectric properties as a function of temperature. Relative permittivity decreased from 850 to 564 (at room temperature) with an increase in x; however, the stability in dielectric properties was improved with an increase in NaNbO3 concentration. At x = 0.25, relative permittivity (εr) was ~630 ± 15% in a temperature range of −70–220 °C with low dielectric loss (tanδ) < 0.025 (−57 to 350 °C) and high recoverable energy density ~0.55 J/cm3 which meet the criterion for X9R MLCC applications.

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Enhanced thermal and cycling reliabilities in (K,Na)(Nb,Sb)O3-CaZrO3-(Bi,Na)HfO3 ceramics

Cited by 15 publications

References 47 publications

Ultrahigh Energy Storage Density and Efficiency of Lead‐Free Dielectrics with Sandwich Structure

Ultrahigh Energy Storage Density and Efficiency of Lead‐Free Dielectrics with Sandwich Structure

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

Enhanced Thermal Stability in Dielectric Properties of NaNbO3–Modified BaTiO3–BiMg1/2Ti1/2O3 Ceramics for X9R-MLCC Applications

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