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Barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density in high electric field and preparation method thereof

A technology with high energy storage density and high power density, applied in the field of barium titanate-based relaxor ferroelectric ceramic materials and its preparation, can solve the problem of remanent polarization, large coercive field, low effective energy storage density and energy storage efficiency , restrictions and other issues, to achieve the effect of high dielectric constant, low equipment requirements, and high power density

Pending Publication Date: 2021-02-23
SOUTHWEST UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, ferroelectric ceramics generally have some disadvantages, such as the existence of remanent polarization, large coercive field, low effective energy storage density and energy storage efficiency, etc., which lead to great limitations in their practical applications.

Method used

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  • Barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density in high electric field and preparation method thereof
  • Barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density in high electric field and preparation method thereof
  • Barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density in high electric field and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0035] Prepare a chemical formula of 0.65(Ba 0.985 La 0.03 ) Ti 0.985 o 3 -0.35 (Sr 0.7 Bi 0.2 )TiO 3 A barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density under high electric field, the specific method is as follows:

[0036] (1) According to the molar ratio of 3961:2561:980:1400:39, the raw material TiO with a purity of more than 99% is weighed 2 、BaCO3 , SrCO 3 、 Bi 2 o 3 , La 2 o 3 Bi 2 o 3 , SrCO 3 and TiO 2 , put the weighed raw materials into the ball mill jar after mixing, and add the ball milling solvent absolute ethanol (the volume ratio of absolute ethanol to the total volume of the raw materials added above is 2:1) and zirconia balls (zirconia The volume ratio of the balls to the total volume of the raw materials added above is 3:2, wherein the zirconia balls are composed of zirconia balls with a diameter of 10mm and a diameter of 5mm according to the number ratio of 1:2), and ball mill...

Embodiment 2

[0044] Prepare a chemical formula of 0.65(Ba 0.985 La 0.03 ) Ti 0.985 o 3 -0.35 (Sr 0.7 Bi 0.2 )TiO 3 A barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density under high electric field, the specific method is as follows:

[0045] (1) According to the molar ratio of 3961:2561:980:1400:39, the raw material TiO with a purity of more than 99% is weighed 2 、BaCO 3 , SrCO 3 、 Bi 2 o 3 , La 2 o 3 Bi 2 o 3 , SrCO 3 and TiO 2 , put the weighed raw materials into the ball mill jar after mixing, and add the ball milling solvent absolute ethanol (the volume ratio of absolute ethanol to the total volume of the raw materials added above is 2:1) and zirconia balls (zirconia The volume ratio of the balls to the total volume of the raw materials added above is 3:2, wherein the zirconia balls are composed of zirconia balls with a diameter of 10mm and a diameter of 5mm according to the number ratio of 1:2), and ball mi...

Embodiment 3

[0053] Prepare a chemical formula of 0.65(Ba 0.985 La 0.03 ) Ti 0.985 o 3 -0.35 (Sr 0.7 Bi 0.2 )TiO 3 A barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density under high electric field, the specific method is as follows:

[0054] (1) According to the molar ratio of 3961:2561:980:1400:39, the raw material TiO with a purity of more than 99% is weighed 2 、BaCO 3 , SrCO 3 、 Bi 2 o 3 , La 2 o 3 Bi 2 o 3 , SrCO 3 and TiO 2 , put the weighed raw materials into the ball mill jar after mixing, and add the ball milling solvent absolute ethanol (the volume ratio of absolute ethanol to the total volume of the raw materials added above is 2:1) and zirconia balls (zirconia The volume ratio of the balls to the total volume of the raw materials added above is 3:2, wherein the zirconia balls are composed of zirconia balls with a diameter of 10mm and a diameter of 5mm according to the number ratio of 1:2), and ball mi...

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Abstract

The invention relates to a barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density in a high electric field and a preparation method of thebarium titanate-based relaxor ferroelectric ceramic material, and belongs to the technical field of dielectric ceramic material preparation. The chemical formula of the material disclosed by the invention is 0.65(Ba0.985La0.03)Ti0.985O3-0.35(Sr0.7Bi0.2)TiO3, and the material has the following properties: the material has high energy storage density in a high electric field at room temperature, the total energy storage density at room temperature in a 280kV / cm electric field is 2.91 J / cm <3>, and the effective energy storage density is 2.23 J / cm <3>, and the energy storage efficiency between 10 kV / cm and 280 kV / cm, and the energy storage efficiency is 75%. The material disclosed by the invention is synthesized by adopting a solid-phase reaction method at a relatively low temperature, is simple and convenient in preparation steps, low in equipment requirement, simple and easy in reaction condition control, good in repeatability, green and environment-friendly, obvious in relaxation phenomenon, low in sintering temperature and high in dielectric constant.

Description

technical field [0001] The invention belongs to the technical field of dielectric ceramic material preparation, and in particular relates to a barium titanate-based relaxor ferroelectric ceramic material with high energy storage density and high power density under high electric field and a preparation method thereof. Background technique [0002] At present, capacitors with higher power density and higher energy storage density are being widely used in mobile communications, medical equipment, military and other pulse fields, and dielectric ceramic capacitors rely on their superior power density and energy storage density and their small size With the characteristics of modernization and integration, it is increasingly becoming the core component of the pulse power supply system. As a typical ferroelectric ceramic, barium titanate has a high relative constant and saturation polarization, and is a potential ideal matrix ceramic. [0003] However, ferroelectric ceramics gene...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
CPCC04B35/468C04B35/622C04B2235/3215C04B2235/3213C04B2235/3227C04B2235/3232C04B2235/3298C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567
Inventor 陈福康李洋严岩于坤李权艾巧刘岗
Owner SOUTHWEST UNIVERSITY
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