Journal ArticleDOI
Effect of grain size on the energy storage properties of (Ba0.4Sr0.6)TiO3 paraelectric ceramics
Zhe Song,Hanxing Liu,Shujun Zhang,Zhijian Wang,Yatong Shi,Hua Hao,Minghe Cao,Zhonghua Yao,Zhiyong Yu +8 more
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TLDR
In this article, the effect of grain size on the energy storage properties of TiO 3 (BST) ceramics with various grain sizes (0.5-5.6μm) was investigated.Abstract:
(Ba 0.4 Sr 0.6 )TiO 3 (BST) ceramics with various grain sizes (0.5–5.6 μm) were prepared by conventional solid state reaction methods. The effect of grain size on the energy storage properties of BST ceramics ( T c ≈ −65 °C) was investigated. With decreasing grain sizes, a clear tendency toward the diffuse phase transition was observed and the dielectric nonlinearity was reduced gradually, which can be explained by the Devonshire's phenomenological theory (from the viewpoint of intrinsic polarization). Based on the multi-polarization mechanism model, the relationship between the polarization behavior of polar nano-regions (the extrinsic nonlinear polarization mechanisms) and grain size was studied. The variation of the grain boundary density was thought to play an important role on the improvement of dielectric breakdown strength, account for the enhanced energy density, which was confirmed by the complex impedance spectroscopy analysis based on a double-layered dielectric model.read more
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Perovskite lead-free dielectrics for energy storage applications
TL;DR: In this paper, the authors summarize the principles of dielectric energy-storage applications, and recent developments on different types of Dielectrics, namely linear dielectrics (LDE), paraelectric, ferroelectrics, and antiferro electrics, focusing on perovskite lead-free dielectors.
Journal ArticleDOI
Homogeneous/Inhomogeneous-Structured Dielectrics and their Energy-Storage Performances.
Zhonghua Yao,Zhe Song,Hua Hao,Zhiyong Yu,Minghe Cao,Shujun Zhang,Michael T. Lanagan,Hanxing Liu +7 more
TL;DR: The optimization of high-energy-storage dielectrics will have far-reaching impacts on the sustainable energy and will be an important research topic in the near future.
Journal ArticleDOI
Potassium–sodium niobate based lead-free ceramics: novel electrical energy storage materials
TL;DR: In this article, a hybridization between the Bi 6p and O 2p orbitals was proposed to improve the recoverable energy density (Wrec) of lead-free bulk ceramics.
Journal ArticleDOI
Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives
Ge Wang,Zhilun Lu,Zhilun Lu,Yong Li,Linhao Li,Hongfen Ji,Antonio Feteira,Di Zhou,Dawei Wang,Dawei Wang,Shujun Zhang,Ian M. Reaney +11 more
TL;DR: In this article, the fundamental principles of energy storage in dielectric capacitors are introduced and a comprehensive review of the state-of-the-art is presented. But the authors do not consider the use of lead-free materials in high-temperature applications, since their toxicity raises concern over their use in consumer applications.
Journal ArticleDOI
Significantly enhanced recoverable energy storage density in potassium–sodium niobate-based lead free ceramics
Zetian Yang,Hongliang Du,Shaobo Qu,Yudong Hou,Hua Ma,Jiafu Wang,Jun Wang,Xiaoyong Wei,Zhuo Xu +8 more
TL;DR: In this article, a (1 − x)-NbO3-SrTiO3 (KNN-ST) with submicrometer grains (about 0.3 μm) were used to improve the dielectric breakdown strength of lead-free bulk ceramics.
References
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Journal ArticleDOI
Dielectric properties of fine‐grained barium titanate ceramics
G. Arlt,D. Hennings +1 more
TL;DR: In this article, the authors studied the dielectric properties, lattice and microstructure of ceramic BaTiO3 showing grain sizes of 0.3-100 μm and showed that at grain sizes <10 μm the width of ferroelectric 90° domains decreases proportionally to the square root of the grain diameter.
Journal ArticleDOI
Ferroelectric materials for microwave tunable applications
TL;DR: A review of the properties of ferroelectric materials that are relevant to microwave tunable devices is presented in this article, where the theory of dielectric response of tunable bulk materials and thin films is discussed.
Journal ArticleDOI
Decoding the Fingerprint of Ferroelectric Loops: Comprehension of the Material Properties and Structures
TL;DR: In this paper, the impact factors on the hysteresis loops are discussed based on recent developments in ferroelectric and related materials, including the effect of materials (grain size and grain boundary, phase and phase boundary, doping, anisotropy, thickness), aging, and measurement conditions (applied field amplitude, fatigue, frequency, temperature, stress), which can affect the hysteretic behaviors of the ferroelectrics.
Journal ArticleDOI
Grain-size effect on structure and phase transformations for barium titanate
M. H. Frey,David A. Payne +1 more
TL;DR: In this article, the results of an investigation into the grain-size dependence of lattice structure for barium titanate (BaTiO) ceramics prepared by a sol-gel method were reported.
Journal ArticleDOI
Grain‐size effects on dielectric properties in barium titanate ceramics
Kyoichi Kinoshita,Akihiko Yamaji +1 more
TL;DR: In this paper, the authors measured the dielectric constant κ in high-purity BaTiO3 ceramics as a function of temperature and showed that κ is quite dependent on grain size in the ferroelectric state.