Journal ArticleDOI
Enhanced energy storage properties in Nb-modified Bi 0.5 Na 0.5 TiO 3 –SrTiO 3 lead-free electroceramics
TLDR
In this paper, the influence of Nb2O5 doping on the phase structure, microstructure, and energy storage properties of lead-free electroceramics was investigated.Abstract:
Lead-free (1 − x)Bi0.5Na0.5TiO3–xSrTiO3 + ywt%Nb2O5 electroceramics were synthesized using the conventional method to investigate the influences of SrTiO3 content and Nb2O5 doping on the material’s phase structure, microstructure, and energy storage properties. All the investigated compositions possessed a single perovskite phase structure of pseudocubic symmetry. The introduction of SrTiO3 and Nb2O5 led to a weakened relaxor characteristic and a decrease of Tm. The microstructure was refined by Nb2O5 doping, and the average grain size of the 0.6Bi0.5Na0.5TiO3–0.4SrTiO3 sample decreased drastically from ~ 10 to ~ 1 µm when 2.5 wt% Nb2O5 was added. Enhanced electrical breakdown and polarization were achieved for the samples with the refined microstructure. Among the various Bi0.5Na0.5TiO3-based ceramics, 0.6Bi0.5Na0.5TiO3–0.4SrTiO3 + 2.5 wt%Nb2O5 ceramic exhibited excellent energy-storage properties with thermal stability, in which large recoverable energy-storage density Wrec ~ 1.82 J/cc and efficiency η ~ 81% were both achieved. Our results indicate that this ceramic is a promising material for lead-free energy storage applications.read more
Citations
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Journal ArticleDOI
A review on the development of lead-free ferroelectric energy-storage ceramics and multilayer capacitors
Haibo Zhang,Tian Wei,Qi Zhang,Weigang Ma,Pengyuan Fan,David Salamon,Shan-Tao Zhang,Bo Nan,Hua Tan,Zuo-Guang Ye +9 more
TL;DR: In this paper, the authors comprehensively summarize the research progress of lead-free dielectric ceramics for energy storage, including ferroelectric, composite, and multilayer capacitors.
Journal ArticleDOI
Significantly Improvement of Comprehensive Energy Storage Performances with Lead-free Relaxor Ferroelectric Ceramics for High-temperature Capacitors Applications
Haoran Ye,Fan Yang,Zhongbin Pan,Di Hu,Xujiao Lv,Hanxi Chen,Feifei Wang,Jiasheng Wang,Peng Li,Jianwen Chen,Jinjun Liu,Jiwei Zhai +11 more
TL;DR: In this article, the SBT doping into BNBLT ceramics could effectively decrease grain size, resulting in enhancement breakdown strength, achieving a superior balance between recoverable energy density (Wrec ~ 4.55 J/cm3) and efficiency (η > 90%).
Journal ArticleDOI
Energy storage performance of Na0.5Bi0.5TiO3-SrTiO3 lead-free relaxors modified by AgNb0.85Ta0.15O3
TL;DR: In this paper, a lead-free relaxor ferroelectric ceramics was used to enhance the breakdown electric field strength, and the results showed that the introduction of AgNb0.85Ta0.15O3 leads to a homogeneous microstructure and small grain size.
Journal ArticleDOI
Phase structure and properties of sodium bismuth titanate lead-free piezoelectric ceramics
TL;DR: The lead-free sodium bismuth titanate (BNT) system has been extensively investigated in the past decade due to its multi-functional electroactive properties as discussed by the authors, including piezoelectricity, electric-field-induced strain, and energy storage performance for applications in sensors, actuators, and dielectric capacitors.
Journal ArticleDOI
Realizing high comprehensive energy storage performances of BNT-based ceramics for application in pulse power capacitors
TL;DR: In this paper, the relaxor ferroelectric (1-x)[0.8Bi0.5Na0.3TiO3]-xSr0.7La0.2Ba(Zr 0.3), 0.7(BNT-BZT)-xSLT ceramics are prepared through solidstate reaction method to obtain excellent comprehensive energy storage performances.
References
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Journal ArticleDOI
Recent progress in relaxor ferroelectrics with perovskite structure
Alexei A. Bokov,Zuo-Guang Ye +1 more
TL;DR: In this article, the lattice dynamics and the peculiar dielectric relaxation in relaxors are discussed, and theoretical models for the mechanisms of PNR formation and freezing into nonergodic glassy state are also presented.
Journal ArticleDOI
Giant strain in lead-free piezoceramics Bi0.5Na0.5TiO3–BaTiO3–K0.5Na0.5NbO3 system
TL;DR: In this paper, the authors describe the development of a class of lead-free (0.94−x)Bi0.5Na 0.5TiO3-0.06BaTiO 3−xK0.4NbO3 ceramics.
Journal ArticleDOI
Giant electric-field-induced strains in lead-free ceramics for actuator applications – status and perspective
Wook Jo,Robert Dittmer,Matias Acosta,Jiadong Zang,Claudia Groh,Eva Sapper,Ke Wang,Jürgen Rödel +7 more
TL;DR: In this paper, the status and perspectives of this new class of actuator ceramics are presented, aiming at covering a wide spectrum of topics, i.e., from fundamentals to practice, and a recent discovery has greatly extended our tool box for material design by furnishing (Bi 1/2Na1/2)TiO3-based (PZT) with a reversible phase transition between an ergodic relaxor state and a ferroelectric with the application of electric field.
Journal ArticleDOI
On the phase identity and its thermal evolution of lead free (Bi1/2Na1/2)TiO3-6 mol% BaTiO3
Wook Jo,Silke Schaab,Eva Sapper,Ljubomira Ana Schmitt,Hans-Joachim Kleebe,Andrew J. Bell,Jürgen Rödel +6 more
TL;DR: In this paper, the temperature-dependent dielectric permittivity of BNT-6BT was studied to disentangle the existing unclear issues over the crystallographic aspects and phase stability of the system.