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Ceramic material with high energy storage performance and ultrafast discharge rate and preparation method thereof

A discharge rate and ceramic material technology, applied in the field of ceramic materials with high energy storage performance and ultra-fast discharge rate and its preparation, can solve the problems of low dielectric breakdown field, hindering practical application, and large dielectric loss. Achieve good temperature stability and frequency stability, excellent energy storage density and efficiency, and small back-shaped area

Active Publication Date: 2020-02-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 Ceramics still have the problems of low energy storage density and high dielectric loss due to its low dielectric breakdown field and high remnant polarization, which seriously hinder its practical application.
In addition, the pulse charge and discharge characteristics of dielectric materials (such as current density, power density, and discharge rate) are more meaningful for practical applications, but are often ignored by researchers.

Method used

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  • Ceramic material with high energy storage performance and ultrafast discharge rate and preparation method thereof
  • Ceramic material with high energy storage performance and ultrafast discharge rate and preparation method thereof
  • Ceramic material with high energy storage performance and ultrafast discharge rate and preparation method thereof

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preparation example Construction

[0047] The preparation method of the ceramic material with high energy storage performance and ultra-fast discharge rate of the present invention comprises the following steps:

[0048] (1) According to chemical formula (1-x) (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xBi(Mg 2 / 3 Nb 1 / 3 )O 3 will analyze pure SrCO 3 、Na 2 CO 3 、TiO 2 、 Bi 2 o 3 , MgO and Nb 2 o 5 The ingredients, where x represents the mole fraction, and 0.05≤x≤0.20, use absolute ethanol as the medium, mix evenly through ball milling for 22 to 24 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and pass through 800 Pre-calcined at ~900°C for 3-5 hours to obtain a block solid, then crush the block solid and pass through a 120-mesh sieve to obtain a pre-calcined powder;

[0049] (2) The calcined powder obtained in step (1) is ball-milled for 22 to 24 hours with absolute ethanol as the medium, then dried at 100° C., and passed through a 120-mesh sieve to obtain the raw material powder;

...

Embodiment 1

[0066] The chemical formula of the ceramic material in this case is: (1-x)(Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xBi(Mg 2 / 3 Nb 1 / 3 )O 3 , wherein x represents the mole fraction, and x=0.05.

[0067] The preparation method of the above-mentioned ceramic material with high energy storage performance and ultra-fast discharge rate comprises the following steps:

[0068] (1) According to chemical formula (1-x) (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xBi(Mg 2 / 3 Nb 1 / 3 )O 3 will analyze pure SrCO 3 、Na2 CO 3 、TiO 2 、 Bi 2 o 3 , MgO and Nb 2 o 5 The ingredients, where x represents the mole fraction, and x=0.05, use absolute ethanol as the medium, mix uniformly by ball milling for 22 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and then pre-calcined at 900°C for 3 hours, block solids were obtained, and then the block solids were pulverized and passed through a 120-mesh sieve to obtain calcined powder;

[0069] (2) The calcined powder obtained in ste...

Embodiment 2

[0074] The chemical formula of the ceramic material in this case is: (1-x)(Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xBi(Mg 2 / 3 Nb 1 / 3 )O 3 , wherein x represents the mole fraction, and x=0.10.

[0075] The preparation method of the above-mentioned ceramic material with high energy storage performance and ultra-fast discharge rate comprises the following steps:

[0076] (1) According to chemical formula (1-x) (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xBi(Mg 2 / 3 Nb 1 / 3 )O 3 will analyze pure SrCO 3 、Na 2 CO 3 、TiO 2 、 Bi 2 o 3 , MgO and Nb 2 o 5 The ingredients, where x represents the mole fraction, and x=0.10, use absolute ethanol as the medium, mix uniformly by ball milling for 23 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and then pre-calcined at 850°C for 4 hours, block solids were obtained, and then the block solids were pulverized and passed through a 120-mesh sieve to obtain calcined powder;

[0077] (2) The calcined powder obtained in s...

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Abstract

The invention provides a ceramic material with high energy storage performance and ultrafast discharge rate and a preparation method thereof, the chemical formula of the ceramic material is (1-x) (Na0.5Bi0.5) 0.7 Sr0.3TiO3-xBi (Mg2 / 3Nb1 / 3) O3, and x is more than or equal to 0.05 and less than or equal to 0.20. The preparation method comprises the following steps: (1) uniformly mixing SrCO3, Na2CO3, TiO2, Bi2O3, MgO and Nb2O5 to obtain raw material powder, briquetting, presintering, crushing and sieving to obtain presintered powder; (2) carrying out ball milling on the presintered powder to obtain raw material powder; and (3) tabletting and molding the raw material powder, and sintering into porcelain to obtain the ceramic material with high energy storage performance and ultrafast discharge rate. The ceramic material has high energy storage performance and excellent charging and discharging performance, is a promising high-performance dielectric candidate material, and has the characteristics of environmental friendliness, high practicability and the like.

Description

technical field [0001] The invention belongs to the technical field of dielectric energy storage ceramic materials, in particular to a ceramic material with high energy storage performance and ultra-fast discharge rate and a preparation method thereof. Background technique [0002] At present, ceramic capacitors have been widely used in electronic equipment such as televisions, mobile communications, and measuring instruments. However, with the rapid development of the electronics industry and the waste of non-renewable resources, the existing energy storage dielectric capacitors have been unable to meet the growing needs of social development due to the poor performance of dielectric materials, which has inspired people to develop high-performance ceramic dielectrics. Material exploration interest. Compared with ferroelectric materials and linear dielectric materials, antiferroelectric materials have higher energy density because of their double hysteresis loops. However,...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622
CPCC04B35/475C04B35/622C04B2235/3213C04B2235/3201C04B2235/3206C04B2235/3251C04B2235/3298
Inventor 杨海波李达林营张苗
Owner SHAANXI UNIV OF SCI & TECH
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