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An antiferroelectric energy storage ceramic with improved energy storage efficiency and its preparation method and application

A technology of energy storage efficiency and anti-ferroelectricity, applied in circuits, capacitors, electrical components, etc., can solve the problems of low energy storage efficiency, achieve high energy storage efficiency, reduce dielectric constant, and high energy storage efficiency

Active Publication Date: 2020-07-24
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problem of low energy storage efficiency of antiferroelectric energy storage ceramics in the prior art

Method used

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  • An antiferroelectric energy storage ceramic with improved energy storage efficiency and its preparation method and application
  • An antiferroelectric energy storage ceramic with improved energy storage efficiency and its preparation method and application
  • An antiferroelectric energy storage ceramic with improved energy storage efficiency and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of antiferroelectric materials with high energy storage density:

[0034] According to the chemical formula (Pb 0.93 Ba 0.04 La 0.02 )(Zr 0.65 sn 0.3 Ti 0.05 )O 3 Carry out batching, prepare 0.2mol (Pb 0.93 Ba 0.04 La 0.02 )(Zr 0.65 sn 0.3 Ti 0.05 )O 3 , PbO (99.9%), La 2 o 3 (99.9%), ZrO 2 (99.5%), SnO 2 (99.6%), TiO 2 (99.6%), BaCO 3 The masses of (99.8%) are 88.901g (6wt% excess lead oxide), 1.304g, 31.950g, 18.158g, 1.604g, 2.392g, respectively. Using wet ball milling method, according to the mass ratio of raw materials: alcohol = 1:0.6, ball milled for 6 hours, after drying, the temperature was raised to 850°C at 5°C per minute, and kept in air for 3 hours. The obtained powder is ball milled, dried, passed through a 60-mesh sieve, pre-pressed at a pressure of 20 MPa, and the pre-pressed powder is subjected to secondary sieving to obtain an antiferroelectric calcined powder with high energy storage density.

[0035] (2) Preparation ...

Embodiment 2

[0040] (1) The same method as (1) in Example 1 was used to prepare the pre-sintered powder of antiferroelectric material with high energy storage density.

[0041] (2) Using the same method as (2) in Example 1 to prepare a linear material powder with high energy storage efficiency.

[0042] (3) Mix the powder obtained in steps (1) and (2) according to the mass ratio of 98:2, ball mill and mix for 4 hours, after drying and pulverizing, add a PVA solution with a concentration of 5%, and the solution accounts for 5% of the powder. The mass percentage is 8%, and after granulation and dry pressing, sintering at 1200°C for 3 hours, and annealing at 1000°C for 1 hour, the energy storage ceramic material is made.

Embodiment 3

[0044] (1) The same method as (1) in Example 1 was used to prepare the pre-sintered powder of antiferroelectric material with high energy storage density.

[0045] (2) Using the same method as (2) in Example 1 to prepare a linear material powder with high energy storage efficiency.

[0046] (3) Mix the powder obtained in steps (1) and (2) according to the mass ratio of 96:4, ball mill and mix for 4 hours, after drying and pulverizing, add a PVA solution with a concentration of 5%, and the solution accounts for 5% of the powder. The mass percentage is 8%, and after granulation and dry pressing, sintering at 1200°C for 3 hours, and annealing at 1000°C for 1 hour, the energy storage ceramic material is made.

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Abstract

The invention discloses an anti-ferroelectric energy storage ceramic capable of improving energy storage efficiency as well as a preparation method and application of the anti-ferroelectric energy storage ceramic and belongs to the field of electric energy storage materials. The preparation method comprises the following step: compounding an anti-ferroelectric medium and a linear medium, thereby obtaining the anti-ferroelectric energy storage ceramic, namely a complex of the anti-ferroelectric medium and the linear medium. The anti-ferroelectric medium is (Pb0.93Ba0.04La0.02)(Zr0.95-xSnxTi0.05)O3, wherein x is more than or equal to 0.3 and less than or equal to 0.45; the linear medium is Ca(ZryTi1-y)O3; and y is more than or equal to 0.3 and less than or equal to 0.5. By compounding the high-energy storage density medium and the high-energy storage efficiency medium, an energy storage material having energy storage density of 4.39 J / cm<3> and energy storage efficiency of 92.23% is obtained.

Description

technical field [0001] The invention belongs to the field of electric energy storage materials, and in particular relates to an antiferroelectric energy storage ceramic with improved energy storage efficiency and a preparation method and application thereof. Background technique [0002] At present, dielectric capacitors have become an indispensable part of aerospace power electronics, underground natural gas and oil exploration, and inverter equipment for hybrid vehicles; The driving current can only be provided by this type of capacitor. [0003] The development level of high energy storage density dielectric materials is basically the same at home and abroad. High energy storage density has been generally obtained in lanthanum-doped zirconium tin lead titanate (PLZST) antiferroelectric ceramics. However, reports of energy storage efficiency as high as 90% very little. Since energy dissipation is mainly dissipated in the form of heat energy, low energy storage efficiency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/01C04B35/622C04B35/626H01G4/12
CPCC04B35/01C04B35/622C04B35/62605C04B2235/3215C04B2235/3227C04B2235/3232C04B2235/3244C04B2235/3293C04B2235/6567H01G4/1245
Inventor 刘品姜胜林张光祖曾亦可李明钰
Owner HUAZHONG UNIV OF SCI & TECH
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