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Environment-friendly lead-free ceramic material with high energy storage performance and preparation method thereof

A lead-free ceramic and high energy storage technology, applied in the field of energy storage ceramics, can solve the problems of limited practical application, environmental and human health hazards, low energy storage density, etc., and achieve excellent energy storage density and efficiency, cheap price, and recycling small area effect

Active Publication Date: 2019-11-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although most of the linear dielectrics have high dielectric breakdown strength and energy storage efficiency, their extremely small polarization strength leads to too small energy storage density, which limits its practical application; antiferrodielectrics among the three dielectric materials Due to its double hysteresis loop, it has a large energy storage density, but most of the antiferroelectric dielectrics contain lead elements, and the toxicity of lead is very harmful to the environment and human health. Therefore, people have made Many efforts have been made to explore lead-free materials to circumvent this problem, including the study of ferroelectrics based on barium titanate and sodium bismuth titanate, but their small energy storage density caused by their low dielectric breakdown strength limits their use in Practical applications in pulsed power systems, so improving its energy storage performance by enhancing dielectric breakdown strength has become a hot spot at this stage

Method used

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  • Environment-friendly lead-free ceramic material with high energy storage performance and preparation method thereof
  • Environment-friendly lead-free ceramic material with high energy storage performance and preparation method thereof
  • Environment-friendly lead-free ceramic material with high energy storage performance and preparation method thereof

Examples

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preparation example Construction

[0052] The preparation method of the environment-friendly high energy storage performance lead-free ceramic material of the present invention comprises the following steps:

[0053] (1) According to chemical formula (1-x) BaTiO 3 -xK 0.73 Bi 0.09 NbO 3 will analyze pure BaCO 3 、TiO 2 、K 2 CO 3 、 Bi 2 o 3 and Nb 2 o 5 The ingredients, where x represents the mole fraction, and 0.02≤x≤0.12, use absolute ethanol as the medium, mix evenly through ball milling for 20-24 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and pass through 900 Pre-calcined at ~950°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;

[0054] (2) The calcined powder obtained in step (1) is ball-milled for 20 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;

[0055] (3) The raw material powder obtained ...

Embodiment 1

[0065] The chemical formula of the ceramic material in this example is: (1-x)BaTiO 3 -xK 0.73 Bi 0.09 NbO 3 , where x represents the mole fraction, and x=0.02.

[0066] The preparation method of the above-mentioned environment-friendly lead-free ceramic material with high energy storage performance comprises the following steps:

[0067] (1) According to chemical formula (1-x) BaTiO 3 -xK 0.73 Bi 0.09 NbO 3 will analyze pure BaCO 3 、TiO 2 、K 2 CO 3 、 Bi 2 o 3 and Nb 2 o 5 The ingredients, where x represents the mole fraction, and x=0.02, 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 950°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) was ball-milled for 24 hours with absolute ethanol as the m...

Embodiment 2

[0075] The chemical formula of the ceramic material in this example is: (1-x)BaTiO 3 -xK 0.73 Bi 0.09 NbO 3 , wherein x represents the mole fraction, and x=0.04.

[0076] The preparation method of the above-mentioned environment-friendly lead-free ceramic material with high energy storage performance comprises the following steps:

[0077] (1) According to chemical formula (1-x) BaTiO 3 -xK 0.73 Bi 0.09 NbO 3 will analyze pure BaCO 3 、TiO 2 、K 2 CO 3 、 Bi 2 o 3 and Nb 2 o 5 The ingredients, where x represents the mole fraction, and x=0.04, 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 920°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;

[0078](2) The calcined powder obtained in step (1) was ball-milled for 22 hours with absolute ethanol as a me...

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Abstract

The invention provides an environment-friendly lead-free ceramic material with high energy storage performance and a preparation method thereof. The chemical formula of the environment-friendly lead-free ceramic material with high energy storage performance is (1-x)BaTiO3-xK0.73Bi0.09NbO3, wherein x is more than or equal to 0.02 and less than or equal to 0.12. The preparation method comprises thefollowing steps: (1) uniformly mixing BaCO3, TiO2, K2CO3, Bi2O3 and Nb2O5 to obtain raw material powder, carrying out briquetting and pre-sintering to obtain a blocky solid, and then crushing and sieving the blocky solid to obtain pre-sintered powder; (2) carrying out ball milling on the pre-sintered powder obtained in the step (1) to obtain raw material powder; and (3) carrying out tabletting andmolding on the raw material powder obtained in the step (2), and then sintering the formed raw material powder into porcelain to obtain the environment-friendly lead-free ceramic material with high energy storage performance. The ceramic material has high dielectric breakdown strength and high energy storage density, and has the advantages 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 an environment-friendly lead-free ceramic material with high energy storage performance and a preparation method thereof. Background technique [0002] In recent years, due to the continuous consumption of non-renewable resources and the increasing pollution of the environment, renewable and environmentally friendly energy materials have attracted more and more attention. Ceramic capacitors have broad application prospects in pulse power systems due to their advantages such as fast charge and discharge speed, large dielectric constant, wide application temperature range, and long service life, and ceramic dielectric materials are used to make small, large Capacitors are key materials for high-capacity and high-efficiency capacitors. They are widely used in many fields such as communications, electronics, automobiles, and military industries due to their advantages such as h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622
CPCC04B35/4682C04B35/622C04B2235/3201C04B2235/3251C04B2235/3298C04B2235/656C04B2235/6567C04B2235/96
Inventor 杨海波李达林营张苗
Owner SHAANXI UNIV OF SCI & TECH
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