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Lead-free high-energy-storage-density and high-energy-storage-efficiency ceramic material and preparation method of same

A technology with high energy storage density and energy storage efficiency, applied in the field of energy storage ceramics, can solve the problems of immature batch production technology, difficulty in meeting the needs of development, human body and environmental pollution, etc. The effect of small size and high breakdown field strength

Active Publication Date: 2017-07-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most antiferroelectric materials contain lead, which has a large proportion of lead, which is highly toxic and will cause serious pollution to the human body and the environment. Therefore, people are working on lead-free
The second category is organic films, such as polyvinylidene fluoride (PVDF) films, polypropylene films, polyester films, etc., which have very high breakdown field strength, but the dielectric constant is very small and the operating temperature is relatively low, resulting in its Severely limited range of use
The third category is the composite dielectric material formed by ceramics and glass or ceramics and polymers. This type of material has a high breakdown electric field, but the mass production technology is not yet mature.
The fourth category is ferroelectric ceramic materials such as barium titanate and sodium bismuth titanate. This type of material has a high dielectric constant and low dielectric loss. The related production technology is very mature, but its energy storage efficiency is low and Energy density is usually less than 1J / cm 3 , it is difficult to meet the needs of development, therefore, effectively improving the energy storage density and energy storage efficiency of ceramic dielectric materials has become a hot spot at this stage

Method used

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  • Lead-free high-energy-storage-density and high-energy-storage-efficiency ceramic material and preparation method of same
  • Lead-free high-energy-storage-density and high-energy-storage-efficiency ceramic material and preparation method of same
  • Lead-free high-energy-storage-density and high-energy-storage-efficiency ceramic material and preparation method of same

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Experimental program
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Effect test

preparation example Construction

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

[0047] (1) According to the chemical formula 0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 will analyze pure BaCO 3 、Na 2 CO 3 、 Bi 2 o 3 、TiO 2 After batching, 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 pre-calcine at 900-950°C for 3-5 hours to obtain blocks shape solid, then crush the massive solid and pass through a 120-mesh sieve to obtain 0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 Powder;

[0048] (2) According to the chemical formula Na 0.73 Bi 0.09 NbO 3 will analyze pure Na 2 CO 3 、 Bi 2 o 3 , Nb 2 o 5 After batching, 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 pre-calcine at ...

Embodiment 1

[0060] The chemical formula of the ceramic material in this case is: (1-x)(0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 )-xNa 0.73 Bi 0.09 NbO 3 , wherein x represents the mole fraction, and x=0.04.

[0061] The preparation method of the above-mentioned lead-free high energy storage density ceramic material comprises the following steps:

[0062] (1) According to the chemical formula 0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 will analyze pure BaCO 3 、Na 2 CO 3 、 Bi 2 o 3 、TiO 2 After batching, use absolute ethanol as the medium, mix evenly through ball milling for 24 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and pre-calcine at 950°C for 3 hours to obtain a block solid, and then the block The solid was crushed and passed through a 120-mesh sieve to obtain 0.65 BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 Powder;

[0063] (2) According to the chemical formula Na 0.73 Bi 0.09 NbO 3 will analyze pure Na 2 CO 3 、 Bi 2 o 3 , Nb 2 o 5 After batching, us...

Embodiment 2

[0070] The chemical formula of the ceramic material in this case is: (1-x)(0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 )-xNa 0.73 Bi 0.09 NbO 3, where x represents the mole fraction, and x=0.06.

[0071] The preparation method of the above-mentioned lead-free high energy storage density ceramic material comprises the following steps:

[0072] (1) According to the chemical formula 0.65BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 will analyze pure BaCO 3 、Na 2 CO 3 、 Bi 2 o 3 、TiO 2 After batching, use absolute ethanol as the medium, mix evenly through ball milling for 22 hours, then dry at 100°C, pass through a 120-mesh sieve, briquette, and pre-calcine at 930°C for 3 hours to obtain a block solid, and then the block The solid was crushed and passed through a 120-mesh sieve to obtain 0.65 BaTiO 3 -0.35Bi 0.5 Na 0.5 TiO 3 Powder;

[0073] (2) According to the chemical formula Na 0.73 Bi 0.09 NbO 3 will analyze pure Na 2 CO 3 、 Bi 2 o 3 , Nb 2 o 5 After batching, use a...

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Abstract

A lead-free high-energy-storage-density and high-energy-storage-efficiency ceramic material and a preparation method of same. The preparation method includes the following steps: 1) preparing raw materials according to the chemical formula (1-x)(0.65BaTiO3-0.35Bi<0.5>Na<0.5>TiO3)-xNa<0.73>Bi<0.09>NbO3, wherein x refers to molar fraction, 0.04 <= x <= 0.10; 2) performing ball-milling and drying to obtain a powder; 3) adding a binder to the powder for granulation, and aging the granules for 24-48 h, pressing the granules into sheets, performing glue removal treatment, and sintering the mixture with temperature maintained at 1100-1150 DEG C for 2-3 h to obtain ceramic, which is the lead-free high-energy-storage-density and high-energy-storage-efficiency ceramic material. The preparation method is simple and stable and is suitable for industrial production. The ceramic material has high energy-storage performance, is 1.24-1.70 J / cm<3> in energy storage density calculated on the basis of ferroelectric hysteresis loop and is 76.95-85.73% in energy storage efficiency.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of energy storage ceramics, in particular to a lead-free ceramic material with high energy storage density and energy storage efficiency and a preparation method thereof. [0003] 【Background technique】 [0004] With the continuous development of information technology, dielectric materials with high energy storage density are the key materials for making small, large-capacity, and high-efficiency capacitors, and they play an increasingly important role in various electronic and power systems. Compared with other energy storage devices, energy storage ceramic capacitors have the advantages of high energy storage density, fast charge and discharge speed, anti-cycle aging, high mechanical strength, suitable for extreme environments such as high temperature and high pressure, and stable performance, which is in line with the development and utilization of new energy It is widely used in many modern fields such as...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
CPCC04B35/4682C04B35/622C04B2235/3201C04B2235/3234C04B2235/3255C04B2235/3298C04B2235/656C04B2235/785C04B2235/96
Inventor 杨海波闫非林营张佳豪高淑雅朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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