Effects of silica coating on the microstructures and energy storage properties of BaTiO 3 ceramics

Zhang, Yiming; Cao, Minghe; Yao, Zhonghua; Wang, Zhijian; Song, Zhe; Ullah, Atta; Hao, Hua; Liu, Hanxing

doi:10.1016/j.materresbull.2015.01.056

Cited by 90 publications

(39 citation statements)

References 25 publications

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“…The hysteresis loops of the virtual core–shell samples are slanted compared with that of the pure ferroelectric, and this effect becomes more prominent with the shell fraction increasing, which can be comprehended from the strong depolarizing electric field of the linear shell acting on the ferroelectric core. A similar trend has also been recently reported in experimental results of BaTiO 3 nanoceramics coated with silica . Due to the dilution effect of the shell, the maximum and remnant polarizations extracted from the hysteresis loops in Fig.…”

Section: Resultssupporting

confidence: 88%

“…A similar trend has also been recently reported in experimental results of BaTiO 3 nanoceramics coated with silica. 29 Due to the dilution effect of the shell, the maximum and remnant polarizations extracted from the hysteresis loops in Fig. 7(a) become reduced with the shell thickening [ Fig.…”

Section: March 2016mentioning

confidence: 99%

“…It is commonly accepted that dielectric breakdown is strongly microstructure dependent, and large endeavors have been made regarding the improvement of microstructure through the enhancement of processing technologies. [24][25][26] In a way to get high dielectric breakdown strength, the modification of the ceramic microstructure through the concept of "core-shell" composite structure, that is, via artificially encapsulating the ferroelectric grains with more breakdown resistant material (typically linear dielectrics, i.e., polymer, silica, or alumina) has recently emerged, [27][28][29] and results show that through the introduction of the shell, simultaneously enhanced energy density and reduced energy loss can be achieved. Despite the numerous experimental efforts made, there is still a lack of detailed understandings of how the shell influences the overall energy storage behaviors and what the optimal fraction the shell should occupy, letting alone the pre-engineering of the core-shell structure.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Energy Density in Core–Shell Ferroelectric Ceramics: Modeling and Practical Conclusions

Wang

2015

J. Am. Ceram. Soc.

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A microstructure‐level model of the core–shell‐structured ferroelectric ceramics was developed through the voronoi tessellation random construction routine. Assuming the shell is linear dielectric and parameterizing the ferroelectric core with a classical and a modified hyperbolic tangent model, finite element method was applied to solve the resulting systems. Statistics of electric field spatial distribution indicate that increasing applied electric field leads to intensified field fluctuation while this effect is weakened through the incorporation with thicker shell. Energy density extracted from the as‐calculated hysteresis loops possesses an optimal value with regard to the shell fraction. Calculation results show that enhancing the saturation polarization and lowering the remnant polarization of the core, as well as modulating the shell fraction within a favorable range, provide the most effective way to obtain high‐energy‐density ceramics. Reducing the core initial and the shell permittivity benefits the energy efficiency. The underlying mechanisms of the enhanced energy density and reduced energy loss in the core–shell ferroelectric ceramics were discovered to be the trade‐offs between the lowered polarization and the weakened dielectric nonlinearity as a consequence of the dilution and depolarization of the shell. This model can guide the engineering of core–shell‐structured ferroelectric ceramics for energy storage.

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Section: Resultssupporting

confidence: 88%

Section: March 2016mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced Energy Density in Core–Shell Ferroelectric Ceramics: Modeling and Practical Conclusions

Wang

2015

J. Am. Ceram. Soc.

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“…It has been reported that energy‐storage density of Pb 0.97 La 0.02 (Zr 0.56 Sn 0.35 Ti 0.09 )O 3 antiferroelectric ceramics increased from 1.9 to 3.3 J cm −3 due to the enhancement of the dielectric breakdown from 110 kV cm −1 to 150 kV cm −1 by glass addition . Recently, nonferroelectric SiO 2 ‐coated BaTiO 3 ceramics, by the so‐called Stöber process, were studied . One of the key features in this study was the ability to control the scale of the interconnected nanocoating layer of the amorphous silica to very precise dimensions of a few nanometers; for example, the thickness of the SiO 2 coating layer could be accurately tailored from 0.5 nm for 1.0 wt% SiO 2 to 12.0 nm for 8.0 wt% SiO 2 , as shown in Figure .…”

Section: State‐of‐the‐art High‐energy‐storage Dielectricsmentioning

confidence: 99%

Section: State‐of‐the‐art High‐energy‐storage Dielectricsmentioning

confidence: 99%

Homogeneous/Inhomogeneous‐Structured Dielectrics and their Energy‐Storage Performances

et al. 2017

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The demand for dielectric capacitors with higher energy-storage capability is increasing for power electronic devices due to the rapid development of electronic industry. Existing dielectrics for high-energy-storage capacitors and potential new capacitor technologies are reviewed toward realizing these goals. Various dielectric materials with desirable permittivity and dielectric breakdown strength potentially meeting the device requirements are discussed. However, some significant limitations for current dielectrics can be ascribed to their low permittivity, low breakdown strength, and high hysteresis loss, which will decrease their energy density and efficiency. Thus, the implementation of dielectric materials for high-energy-density applications requires the comprehensive understanding of both the materials design and processing. 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.

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Ferroelectric Materials for Dielectric Energy Storage: Progress and Material Design

Zhang,

Tan,

Huang

et al. 2024

Piezoelectric Materials

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Effects of silica coating on the microstructures and energy storage properties of BaTiO 3 ceramics

Cited by 90 publications

References 25 publications

Enhanced Energy Density in Core–Shell Ferroelectric Ceramics: Modeling and Practical Conclusions

Enhanced Energy Density in Core–Shell Ferroelectric Ceramics: Modeling and Practical Conclusions

Homogeneous/Inhomogeneous‐Structured Dielectrics and their Energy‐Storage Performances

Ferroelectric Materials for Dielectric Energy Storage: Progress and Material Design

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