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Preparation method of core-shell-structured dielectric medium ceramic with high energy storage density
The invention discloses a preparation method of core-shell-structured dielectric medium ceramic with high energy storage density. The method comprises the following steps: firstly, preparing Ba0.4Sr0.6TiO3 powder through a sol-gel method; secondly, covering the Ba0.4Sr0.6TiO3 powder with SiO2 prepared by hydrolyzing tetraethoxysilane; secondly, filling the prepared powder into a mold, and sintering by using a discharging plasma sintering system in a vacuum environment at the temperature of 1000 DEG C to 1050 DEG C to prepare a ceramic sintered body; finally, treating the ceramic sintered body at the temperature of 1100 DEG C to 1150 DEG C under an air atmosphere for 1 to 5 hours to prepare the core-shell-structured dielectric medium ceramic with the high energy storage density. The energy storage density of the core-shell-structured dielectric medium ceramic with the high energy storage density, which is prepared by the preparation method, can be up to more than 1.60J/cm<3> at a room temperature; compared with Ba0.4Sr0.6TiO3 dielectric medium ceramic which is not covered by SiO2 under the same condition, the energy storage density of the dielectric medium ceramic is improved by 0.40J/cm<3>.
Preparation method of core-shell-structured dielectric medium ceramic with high energy storage density
The invention discloses a preparation method of core-shell-structured dielectric medium ceramic with high energy storage density. The method comprises the following steps: firstly, preparing Ba0.4Sr0.6TiO3 powder through a sol-gel method; secondly, covering the Ba0.4Sr0.6TiO3 powder with SiO2 prepared by hydrolyzing tetraethoxysilane; secondly, filling the prepared powder into a mold, and sintering by using a discharging plasma sintering system in a vacuum environment at the temperature of 1000 DEG C to 1050 DEG C to prepare a ceramic sintered body; finally, treating the ceramic sintered body at the temperature of 1100 DEG C to 1150 DEG C under an air atmosphere for 1 to 5 hours to prepare the core-shell-structured dielectric medium ceramic with the high energy storage density. The energy storage density of the core-shell-structured dielectric medium ceramic with the high energy storage density, which is prepared by the preparation method, can be up to more than 1.60J/cm<3> at a room temperature; compared with Ba0.4Sr0.6TiO3 dielectric medium ceramic which is not covered by SiO2 under the same condition, the energy storage density of the dielectric medium ceramic is improved by 0.40J/cm<3>.
Preparation method of core-shell-structured dielectric medium ceramic with high energy storage density
WU YONGJUN (Autor:in) / HUANG YUHUI (Autor:in) / CHEN XIANGMING (Autor:in)
30.12.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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