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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515An Energy Storage Material Fabricated by Coating...

An Energy Storage Material Fabricated by Coating Ba_0.40Sr_0.60TiO₃ Nano Particles with Aluminum Oxide Doped with Zinc Oxide Shell

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Abstract:

For energy storage devices such as capacitances, pulsed power applications and other any electronic systems, high permittivity and high breakdown strength (BDS) are necessary for dielectric materials used in high energy storage capacitors. Ba_0.4Sr_0.6TiO₃ nano-powders were directly synthesized from solution and then wrapped by a thin surrounding shell with composition of zinc oxides dopants in aluminum oxides. This core-shell structure was characterized by a conjunction of XRD, and TEM analysis. The core-shell nanoparticles were pressed into pellets with 10 mm diameter and then sintered at different temperature in air. The specimen coated with 2.0wt% compounds of aluminum oxides doped with zinc oxides showed the maximum breakdown strength of 475kV/cm and the energy storage density of 4.7J/cm3 while the tanδ was only 0.002, whereas the uncoated Ba_0.4Sr_0.6TiO₃ was only 86.9kV/cm, 0.23J/cm3 and 0.005, respectively. And the energy storage density and the BDS decreased when the shell content was more than 2.0wt%.

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High-Performance Ceramics VII

Info:

Periodical:

Key Engineering Materials (Volumes 512-515)

Pages:

1635-1640

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.1635

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Cite this paper

Online since:

June 2012

Authors:

Chao Xu, Bo Shen, Ji Wei Zhai

Keywords:

Breakdown Strength, BST, Dielectric Storage Material, Energy Density

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