Fabrication of Monodisperse Ba0.80Sr0.20Zr0.10Ti0.90O3@mSiO2 Particles and Fine-Grained Ceramic with Mesoporous SiO2 Coating for Enhanced Energy Storage Properties
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Monodisperse submicron Ba0.8Sr0.2Zr0.1Ti0.9O3 (BSZT) particles have been prepared using an aqueous phase method. Cetyltrimethylammonium bromide was used as a template and surfactant to achieve a mesoporous SiO2 shell coating on the surface of the BSZT particles via tetraethoxysilane hydrolysis, resulting in BSZT@mSiO2 particles (where “m” means “mesoporous”) with high dispersibility. A dense, fine-grained BSZT@mSiO2 energy-storage ceramic (with grain size ≤ 280 nm) was obtained by sintering in air at 1050°C for 2 h. The maximum dielectric constant and energy storage density of the BSZT@mSiO2 ceramics were 782 and 0.27 J/cm3, respectively, at room temperature. The mesoporous SiO2 shell of the BSZT@mSiO2 particles improved the dielectric constant and energy storage density of the ceramic compared with a non-mesoporous SiO2 shell. This method therefore represents an interesting approach for preparation of fine-grained energy storage ceramics.
KeywordsCore–shell structure mesoporous fine-grained ceramics energy storage properties
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We thank the National Natural Science Foundation of China (Grant No. 21071115), Shaanxi Province Natural Science Foundation Research Project (Grant No. 2016JZ006), Education Committee of Shaanxi Province (Grant No. 16JS112), and Shaanxi Light Optoelectronics Material Co., Ltd. (Grant No. 2015610002001920) for funding this research.
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