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High-efficiency energy-storage linear dielectric ceramic material and preparation method thereof

A dielectric ceramic and linear electrical technology, applied in the field of linear dielectric ceramic materials, can solve the problems of low breakdown strength and achieve the effects of improving breakdown strength, good compactness, and reducing waste of resources

Active Publication Date: 2019-04-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the ceramic dielectric material has a high dielectric constant, but the breakdown strength is generally low, and in a single material, it is generally difficult to obtain high dielectric constant and high breakdown strength at the same time

Method used

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  • High-efficiency energy-storage linear dielectric ceramic material and preparation method thereof
  • High-efficiency energy-storage linear dielectric ceramic material and preparation method thereof
  • High-efficiency energy-storage linear dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The chemical formula of the linear dielectric ceramic material is: Ca 0.6 Sr 0.4 Ti 1-x Zr xo 3 , wherein x represents the mole percentage, and x=0.

[0033] The above Zr-doped Ca 0.6 Sr 0.4 TiO 3 A preparation method for a linear dielectric ceramic material, comprising the following steps:

[0034] (1) According to the chemical formula Ca 0.6 Sr 0.4 Ti 1-x Zr x o 3 (x=0) will analyze pure SrCO 3 , CaCO 3 、TiO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and then pre-calcined to obtain a block solid;

[0035] (2) After crushing the massive solid, ball milling is carried out again, and the product is sieved to obtain Ca 0.6 Sr 0.4 TiO 3 Powder;

[0036] (3) Ca will be obtained 0.6 Sr 0.4 TiO 3 For the powder, weigh 0.4-0.45g per portion, then pour it into the mold, apply a force of 600N, and demould the formed disc to obtain a sample with a good shape;

[0037] (4) Place the wafer in the rubber sleeve, use vacuum ...

Embodiment 2

[0044] The chemical formula of the linear dielectric ceramic material is: Ca 0.6 Sr 0.4 Ti 1-x Zr x o 3 , wherein x represents a mole percentage, and x=0.1.

[0045] The above Zr-doped Ca 0.6 Sr 0.4 TiO 3 A preparation method for a linear dielectric ceramic material, comprising the following steps:

[0046] (1) According to the chemical formula Ca 0.6 Sr 0.4 Ti 1-x Zr x o 3 (x=0.1) will analyze pure SrCO 3 , CaCO 3 、TiO 2 , ZrO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and then pre-calcined to obtain a block solid;

[0047] (2) After crushing the massive solid, ball milling is carried out again, and the product is sieved to obtain Ca 0.6 Sr 0.4 Ti 0.9 Zr 0.1 o 3 Powder;

[0048] (3) Ca will be obtained 0.6 Sr 0.4 Ti 0.9 Zr 0.1 o 3 For the powder, weigh 0.4-0.45g per portion, then pour it into the mold, apply a force of 600N, and demould the formed disc to obtain a sample with a good shape;

[0049] (4) Place the...

Embodiment 3

[0056] The chemical formula of the linear dielectric ceramic material is: Ca 0.6 Sr 0.4 Ti 1-x Zr x o 3 , wherein x represents a mole percentage, and x=0.2.

[0057] The above Zr-doped Ca 0.6 Sr 0.4 TiO 3 A preparation method for a linear dielectric ceramic material, comprising the following steps:

[0058] (1) According to the chemical formula Ca 0.6 Sr 0.4 Ti 1-x Zr x o 3 (x=0.2) will analyze pure SrCO 3 , CaCO 3 、TiO 2 , ZrO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and then pre-calcined to obtain a block solid;

[0059] (2) After crushing the massive solid, ball milling is carried out again, and the product is sieved to obtain Ca 0.6 Sr 0.4 Ti 0.8 Zr 0.2 o 3 Powder;

[0060] (3) Ca will be obtained 0.6 Sr 0.4 Ti 0.8 Zr 0.2 o 3 For the powder, weigh 0.4-0.45g per portion, then pour it into the mold, apply a force of 600N, and demould the formed disc to obtain a sample with a good shape;

[0061] (4) Place the...

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Abstract

The invention discloses a high-efficiency energy-storage linear dielectric ceramic material. A preparation method of the material comprises the steps: firstly, taking SrCO3, CaCO3, TiO2 and ZrO2 as raw materials, taking materials according to the chemical formula of Ca0.6Sr0.4Ti1-xZrxO3, mixing powders by wet ball milling, pre-firing the dried powder at the temperature of 1200 DEG C for 2 h, thencarrying out secondary ball milling, sieving and moulding, and finally, sintering for 2 h at the temperature of 1390-1550 DEG C, to obtain the required linear dielectric ceramic material. The preparedceramic material has the advantages of simple preparation process, low raw material price and low production cost. Linear hysteresis loops can be obtained at room temperature, the maximum energy storage density can reach 2.05 J / cm<3> and is 2.9 times of the energy storage density of undoped SrTiO3, and the energy storage efficiency can be guaranteed to be 95% or more.

Description

technical field [0001] The invention belongs to the technical field of linear dielectric ceramic materials, and relates to a Zr-doped Ca 0.6 Sr 0.4 TiO 3 Linear dielectric ceramic material with high energy storage efficiency and preparation method thereof. Background technique [0002] With the rapid development of pulse power technology in the fields of hybrid electric vehicles, aerospace and oil drilling, the requirements of "high temperature, high energy density and high reliability" have been put forward for energy storage dielectric capacitors. However, the performance of energy storage dielectric capacitors mainly depends on the energy storage dielectric materials used. With the development of miniaturization of pulsed power sources, the development of solid-state energy storage dielectric materials has been paid more and more attention. Among them, the ceramic dielectric material has a high dielectric constant, but the breakdown strength is generally low, and in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622
CPCC04B35/49C04B35/622C04B2235/3208
Inventor 蒲永平王雯郭旭史瑞科杨梦蝶李经纬师裕
Owner SHAANXI UNIV OF SCI & TECH
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