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A kind of 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 high remnant polarization, low dielectric breakdown field, and obstacles to practical applications , to achieve the effect of improving the dielectric breakdown field strength, high density, and suppressing the remnant polarization

Active Publication Date: 2022-06-07
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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  • A kind of ceramic material with high energy storage performance and ultrafast discharge rate and preparation method thereof
  • A kind of ceramic material with high energy storage performance and ultrafast discharge rate and preparation method thereof
  • A kind of 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 the 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 Analytically 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, take absolute ethanol as the medium, and mix them uniformly by ball milling for 22 to 24 hours, then dry at 100 ° C, pass through a 120-mesh sieve, briquette, and then pass 800 Pre-sintering at ~900°C for 3-5 hours to obtain block solids, and then crushing the block solids and passing through a 120-mesh sieve to obtain pre-calcined powders;

[0049] (2) using absolute ethanol as a medium for the pre-fired powder obtained in step (1), ball-milling for 22 to 24 hours, then drying at 100° C., and passing through a 120-mesh sieve to obtain...

Embodiment 1

[0066] The chemical formula of the ceramic material in this example 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 , where x represents the mole fraction and x=0.05.

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

[0068] (1) According to the 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 Analytically pure SrCO 3 , Na2 CO 3 , TiO 2 , Bi 2 O 3 , MgO and Nb 2 O 5 Ingredients, where x represents the mole fraction, and x=0.05, with absolute ethanol as the medium, mixed uniformly by ball milling for 22 hours, then dried at 100 ° C, passed through a 120-mesh sieve, briqueted, and then pre-fired at 900 ° C for 3 120 mesh sieves to obtain calcined powder;

[0069] (2) using absolute ethanol as a medium for the pre-fired powder obtained in step (1), ball-milling for 22 hours, then drying a...

Embodiment 2

[0074] The chemical formula of the ceramic material in this example 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 , where x represents the mole fraction, and x=0.10.

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

[0076] (1) According to the 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 Analytically pure SrCO 3 , Na 2 CO 3 , TiO 2 , Bi 2 O 3 , MgO and Nb 2 O 5 Ingredients, where x represents the mole fraction, and x=0.10, with anhydrous ethanol as the medium, mixed uniformly by ball milling for 23 hours, then dried at 100 ° C, passed through a 120-mesh sieve, briqueted, and then pre-fired at 850 ° C for 4 120 mesh sieves to obtain calcined powder;

[0077] (2) using absolute ethanol as a medium for the pre-fired powder obtained in step (1), ball-milling for 23 hours, then dryi...

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Abstract

The invention provides a ceramic material with high energy storage performance and ultra-fast discharge rate and a preparation method thereof, the chemical formula 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 , where 0.05≤x≤0.20. Including the following steps: (1) SrCO 3 、Na 2 CO 3 、TiO 2 、 Bi 2 o 3 , MgO and Nb 2 o 5 Mixing evenly to obtain raw material powder, briquetting, pre-calcining, crushing and sieving to obtain pre-calcined powder; (2) ball milling the pre-calcined powder to obtain raw material powder; (3) pressing the raw material powder into tablets, Then sintered into porcelain to obtain a ceramic material with high energy storage performance and ultra-fast discharge rate. This ceramic material, with its high energy storage performance and excellent charge-discharge performance, is a promising candidate for high-performance dielectrics, as well as being environmentally friendly and highly practicable.

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 increasing demands of social development due to the poor performance of the dielectric materials, which has stimulated people's interest in high-performance ceramic dielectrics. Material exploration interest. Compared with ferroelectric materials and linear dielectric materials, antiferroelectric materials have higher energy densities because they have double hysteresis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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