Bismuth ferrite and barium titanate-based ceramic with high energy storage density and high power density and preparation method thereof

A bismuth ferrite barium titanate, high power density technology, applied in the field of ceramic dielectric materials for pulse power capacitors, can solve the problems of inability to replace lead-based ceramic materials, low energy storage density and energy storage efficiency, etc. Recalcitrant field and remanent polarization, improving energy storage performance, effect of high saturation polarization

Active Publication Date: 2020-06-09
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy storage density and energy storage efficiency of most bismuth ferrite barium titanate-based ceramics are still low (energy storage density3 , energy storage density<80%), which still cannot replace lead-based ceramic materials

Method used

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  • Bismuth ferrite and barium titanate-based ceramic with high energy storage density and high power density and preparation method thereof
  • Bismuth ferrite and barium titanate-based ceramic with high energy storage density and high power density and preparation method thereof
  • Bismuth ferrite and barium titanate-based ceramic with high energy storage density and high power density and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation conforms to the chemical composition (1-x) (0.67BiFeO 3 -0.33BaTiO 3 )-xBaBi 2 Nb 2 o 9 , the lead-free energy storage ceramics of x=0.02, comprising the following steps:

[0039](1) Ingredients: Bi 2 o 3 Powder, Fe 2 o 3 Powder, BaCO 3 Powder, TiO 2 Powder and Nb 2 o 5 Powder is used as raw material, according to the general formula 0.98(0.67BiFeO 3 -0.33BaTiO 3 )-0.02BaBi 2 Nb 2 o 9 The stoichiometry of Bi, Ba, Fe, Ti and Nb in the mixture is batched;

[0040] (2) One-time ball milling: add absolute ethanol equal to the mixture to the above mixture, and continue ball milling for 12 hours, so that the powder is mixed evenly to form a slurry, which can further improve the comprehensive performance of bismuth ferrite barium titanate ceramic materials performance;

[0041] (3) drying: the above slurry is placed in a constant temperature oven to bake, remove absolute ethanol, and grind in a mortar to obtain powder;

[0042] (4) Tablet pre...

Embodiment 2

[0049] The preparation conforms to the chemical composition (1-x) (0.67BiFeO 3 -0.33BaTiO 3 )-xBaBi 2 Nb 2 o 9 , the lead-free energy storage ceramics of x=0.04, comprising the following steps:

[0050] (1) Ingredients: Bi 2 o 3 Powder, Fe 2 o 3 Powder, BaCO 3 Powder, TiO 2 Powder and Nb 2 o 5 Powder is used as raw material, according to the general formula 0.96(0.67BiFeO 3 -0.33BaTiO 3 )-0.04BaBi 2 Nb 2 o 9 The stoichiometry of Bi, Ba, Fe, Ti and Nb in the mixture is batched;

[0051] (2) One-time ball milling: add absolute ethanol equal to the mixture to the above mixture, and continue ball milling for 12 hours, so that the powder is mixed evenly to form a slurry, which can further improve the comprehensive performance of bismuth ferrite barium titanate ceramic materials performance;

[0052] (3) drying: the above slurry is placed in a constant temperature oven to bake, remove absolute ethanol, and grind in a mortar to obtain powder;

[0053] (4) Tablet pr...

Embodiment 3

[0060] The preparation conforms to the chemical composition (1-x) (0.67BiFeO 3 -0.33BaTiO 3 )-xBaBi 2 Nb 2 o 9 , the lead-free energy storage ceramics of x=0.06, comprising the following steps:

[0061] (1) Ingredients: Bi 2 o 3 Powder, Fe 2 o 3 Powder, BaCO 3 Powder, TiO 2 Powder and Nb 2 o 5 Powder is used as raw material, according to the general formula 0.94(0.67BiFeO 3 -0.33BaTiO 3 )-0.06BaBi 2 Nb 2 o 9 The stoichiometry of Bi, Ba, Fe, Ti and Nb in the mixture is batched;

[0062] (2) One-time ball milling: add absolute ethanol equal to the mixture to the above mixture, and continue ball milling for 12 hours, so that the powder is mixed evenly to form a slurry, which can further improve the comprehensive performance of bismuth ferrite barium titanate ceramic materials performance;

[0063] (3) drying: the above slurry is placed in a constant temperature oven to bake, remove absolute ethanol, and grind in a mortar to obtain powder;

[0064] (4) Tablet pr...

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Abstract

The invention discloses bismuth ferrite and barium titanate-based ceramic with high energy storage density and high power density and a preparation method of the bismuth ferrite and barium titanate-based ceramic. According to the preparation method, a 0.67BiFeO3-0.33BaTiO3 system ferroelectric material is used as a basis, a bismuth layered material BaBi2Nb2O9 is doped into bismuth ferrite and barium titanate-based ceramic according to a certain molar ratio, a novel energy storage ceramic material with high energy storage density and high power density is prepared by adopting a solid-phase synthesis method, the chemical composition of the ceramic material is (1-x)(0.67BiFeO3-0.33BaTiO3) -xBaBi2Nb2O9, and x is greater than or equal to 0.02 and less than or equal to 0.1. According to the obtained energy storage ceramic material, the main performance parameters can be as follows: the energy storage density Wrec is 3.09 J/cm<3>, the energy storage efficiency eta is 85.6%, the power densityPD is 27.2 MW/cm<3> in a 100kV/cm electric field, and the current density can reach 543.95 A/cm<2>. In addition, the preparation process is stable and reliable, the production cost is low, industrialproduction is easy to achieve, and the current lead-free environment-friendly requirement is met. The bismuth ferrite and barium titanate-based ceramic can be widely applied to pulse power systems ofhigh-power microwave weapons, laser weapons, electromagnetic transmitters and hybrid electric vehicles.

Description

technical field [0001] The invention relates to a bismuth ferrite barium titanate-based ceramic material with high energy storage density and high power density and a preparation method thereof, in particular to a bismuth-doped layered material BaBi 2 Nb 2 o 9 The invention relates to the preparation of bismuth ferrite barium titanate ceramics, belonging to the field of ceramic dielectric materials for pulse power capacitors. Background technique [0002] In recent years, with the miniaturization and integration of electronic components, this has put forward higher requirements for electronic materials. Compared with energy storage devices such as batteries and chemical capacitors, dielectric capacitors have the advantages of high power density, fast discharge speed, and long service life. Bulk ceramic dielectric capacitors have higher temperature stability and total energy storage. It can be widely used in high-power pulse weapons, electromagnetic launchers, energy stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/63
CPCC04B35/26C04B35/622C04B35/6303C04B2235/3215C04B2235/3232C04B2235/3251C04B2235/3298C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567Y02P40/60
Inventor 郑鹏陈志腾白兴智白王峰郑梁张阳
Owner HANGZHOU DIANZI UNIV
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