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High-energy-density strontium bismuth titanate based composite ceramic and preparation method thereof
The invention discloses a high-energy-density strontium bismuth titanate based composite ceramic and a preparation method thereof. Constituents of the high-energy-density strontium bismuth titanate based composite ceramic are expressed by a general formula (1-x-y)Sr(1-1.5)z(Bi0.8La0.2)zTiO(3-x)(Bi0.5Na0.5)(1-m)MgmTiO(3-y)Bi0.5Li0.5(Ti0.92Mn0.08)O3, wherein x, y, z and m represent molar fractions; x is greater than or equal to 0.2 and less than or equal to 0.7; y is greater than or equal to 0.01 and less than or equal to 0.2; z is greater than or equal to 0.05 and less than or equal to 0.3; m is greater than or equal to 0.02 and less than or equal to 0.2. The high-energy-density strontium bismuth titanate based composite ceramic is prepared by adjusting the constituents to form a composite composition, and adopting microwave sintering to form a dense structure with uniform and small crystal grains, so as to keep a high dielectric constant and obtain a high withstand voltage. The preparation method disclosed by the invention is simple and stable in preparation process and suitable for industrial popularization and application. The high-energy-density composite ceramic dielectric material is excellent in energy storage characteristic and energy storage efficiency; the stored energy density can be up to 1.9 J/cm<3>; the energy storage efficiency can be up to 65%; the high-energy-density composite ceramic dielectric material is environment-friendly, low in loss and good in practicability.
High-energy-density strontium bismuth titanate based composite ceramic and preparation method thereof
The invention discloses a high-energy-density strontium bismuth titanate based composite ceramic and a preparation method thereof. Constituents of the high-energy-density strontium bismuth titanate based composite ceramic are expressed by a general formula (1-x-y)Sr(1-1.5)z(Bi0.8La0.2)zTiO(3-x)(Bi0.5Na0.5)(1-m)MgmTiO(3-y)Bi0.5Li0.5(Ti0.92Mn0.08)O3, wherein x, y, z and m represent molar fractions; x is greater than or equal to 0.2 and less than or equal to 0.7; y is greater than or equal to 0.01 and less than or equal to 0.2; z is greater than or equal to 0.05 and less than or equal to 0.3; m is greater than or equal to 0.02 and less than or equal to 0.2. The high-energy-density strontium bismuth titanate based composite ceramic is prepared by adjusting the constituents to form a composite composition, and adopting microwave sintering to form a dense structure with uniform and small crystal grains, so as to keep a high dielectric constant and obtain a high withstand voltage. The preparation method disclosed by the invention is simple and stable in preparation process and suitable for industrial popularization and application. The high-energy-density composite ceramic dielectric material is excellent in energy storage characteristic and energy storage efficiency; the stored energy density can be up to 1.9 J/cm<3>; the energy storage efficiency can be up to 65%; the high-energy-density composite ceramic dielectric material is environment-friendly, low in loss and good in practicability.
High-energy-density strontium bismuth titanate based composite ceramic and preparation method thereof
ZHOU CHANGRONG (Autor:in) / XU JIWEN (Autor:in) / LI QINGNING (Autor:in) / YUAN CHANGLAI (Autor:in) / ZENG WEIDONG (Autor:in) / YANG LING (Autor:in) / CHEN GUOHUA (Autor:in)
17.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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