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Lead-free ceramic material with high energy storage and charge-discharge performance and preparation method thereof

A technology of charge and discharge performance and ceramic materials, applied in the field of ceramic materials and their preparation, can solve the problems of low breakdown electric field strength, large residual polarization strength, low energy storage density, etc., and achieve good temperature stability and frequency stability. , good stability, small loop area effect

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

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Problems solved by technology

However, their low breakdown electric field strength and large remnant polarization result in low energy storage density, which limits their practical applications in pulsed power systems

Method used

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  • Lead-free ceramic material with high energy storage and charge-discharge performance and preparation method thereof
  • Lead-free ceramic material with high energy storage and charge-discharge performance and preparation method thereof
  • Lead-free ceramic material with high energy storage and charge-discharge performance and preparation method thereof

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preparation example Construction

[0046] The preparation method of the lead-free high energy storage and charge-discharge performance ceramic material of the present invention comprises the following steps:

[0047] (1) According to chemical formula (1-x) (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xSr(Ti 0.85 Zr 0.15 )O 3 will analyze pure SrCO 3 、Na 2 CO 3 、TiO 2 , ZrO 2 and Bi 2 o 3 The ingredients, where x represents the mole fraction, and 0.10≤x≤0.40, use absolute ethanol as the medium, mix evenly through ball milling for 20-25 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and pass through 850 Pre-calcined at ~950°C for 2-6 hours to obtain a block solid, then crush the block solid and pass through a 120-mesh sieve to obtain a pre-calcined powder;

[0048] (2) The calcined powder obtained in step (1) is ball-milled for 20 to 25 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;

[0049] (3) The...

Embodiment 1

[0065] 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 -xSr(Ti 0.85 Zr 0.15 )O 3 , wherein x represents the mole fraction, and x=0.10.

[0066] The preparation method of the above-mentioned lead-free high energy storage and charge-discharge performance ceramic material comprises the following steps:

[0067] (1) According to chemical formula (1-x) (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xSr(Ti 0.85 Zr 0.15 )O 3 will analyze pure SrCO 3 、Na 2 CO 3 、TiO 2 , ZrO 2 and Bi 2 o 3 The ingredients, where x represents the mole fraction, and x=0.10, use absolute ethanol as the medium, mix uniformly by ball milling for 20 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and then pre-calcined at 850°C for 2 hours, block solids were obtained, and then the block solids were pulverized and passed through a 120-mesh sieve to obtain calcined powder;

[0068] (2) The calcined powder obtained in step (1) wa...

Embodiment 2

[0073] 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 -xSr(Ti 0.85 Zr 0.15 )O 3 , where x represents the mole fraction, and x=0.20.

[0074] The preparation method of the above-mentioned lead-free high energy storage and charge-discharge performance ceramic material comprises the following steps:

[0075] 1) According to chemical formula (1-x) (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 -xSr(Ti 0.85 Zr 0.15 )O 3 will analyze pure SrCO 3 、Na 2 CO 3 、TiO 2 , ZrO 2 and Bi 2 o 3 The ingredients, where x represents the mole fraction, and x=0.20, use absolute ethanol as the medium, mix uniformly by ball milling for 24 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and then pre-calcined at 900°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;

[0076] (2) The calcined powder obtained in step (1) was b...

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Abstract

The invention provides a lead-free ceramic material with high energy storage and charge-discharge performance and a preparation method thereof, the chemical formula of the ceramic material is (1-x) (Na0.5Bi0.5) 0.7 Sr0.3TiO3-xSr (Ti0.85Zr0.15) O3, and x is more than or equal to 0.10 and less than or equal to 0.40. The preparation method comprises the following steps: (1) uniformly mixing SrCO3, Na2CO3, TiO2, ZrO2 and Bi2O3 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 lead-free high-energy-storage and charge-discharge-performance ceramic material. 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 field of energy storage ceramics, in particular to a lead-free ceramic material with high energy storage and charging and discharging performance and a preparation method thereof. Background technique [0002] With the excessive consumption of non-renewable resources such as fossil fuels, the increasingly serious environmental pollution, and the increasing demand of the electronics industry, it is becoming more and more urgent and important to develop new renewable and environmentally friendly energy storage media materials. Compared with lithium-ion batteries or fuel cells, dielectric capacitors have the advantages of high power density, fast energy release, and environmental friendliness, and have attracted extensive attention in the field of advanced energy storage. Polymers and ceramics are the two main materials for dielectric capacitors. Among them, ceramic dielectric materials have received extensive attention in th...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/622C04B41/88
CPCC04B35/462C04B35/622C04B41/009C04B41/5116C04B41/88C04B2235/3213C04B2235/3201C04B2235/3244C04B2235/3298C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567C04B2235/786
Inventor 杨海波李达林营张苗
Owner SHAANXI UNIV OF SCI & TECH
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