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A lead-free ceramic dielectric with high energy storage density and high energy storage efficiency and preparation method thereof

A high energy storage density, ceramic dielectric technology, applied in chemical instruments and methods, ceramic molding machines, ceramic layered products, etc., can solve the limitations of miniaturization, integration and high performance of lead-free electronic components, breakdown The electric field strength and the maximum polarization strength are difficult to improve at the same time, and the energy storage efficiency is low, so as to achieve the effect of simple and convenient preparation method, high volatility and excellent performance

Active Publication Date: 2022-02-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the breakdown electric field strength and maximum polarization strength of lead-free ceramic dielectrics are often difficult to increase simultaneously, resulting in the low energy storage density of most lead-free ceramic capacitors (3 ), low energy storage efficiency (<80%), which limits the development requirements of lead-free electronic components for miniaturization, integration and high performance

Method used

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  • A lead-free ceramic dielectric with high energy storage density and high energy storage efficiency and preparation method thereof
  • A lead-free ceramic dielectric with high energy storage density and high energy storage efficiency and preparation method thereof
  • A lead-free ceramic dielectric with high energy storage density and high energy storage efficiency and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A lead-free high energy density and high energy efficiency of a ceramic dielectric (hereinafter referred to as dielectric ceramics) Preparation method:

[0068] To step S1, in accordance with the formula 0.80Bi 0.5 NA 0.5 TiO 3 -0.20srnb 0.5 Al 0.5 O 3 (Hereinafter referred to as BNTSNA) Weigh 14.3964g Bi 2 O 3 , 3.2484g Na 2 CO, 4.5612g SrCO 3 , 9.9714g TiO 2 , 0.7797g Al 2 O 3 And 2.0428gNb 2 O 5 As the raw dielectric material was prepared outer electrically, and then according to the formula 0.94Bi 0.55 NA 0.45 TiO 3 -0.06batio 3 (Hereinafter referred to as BNBT) Weigh 40.9673g Bi 2 O 3 , 7.5632g Na 2 CO 3 , 4.0271g BaCO 3 , 27.4423g TiO 2 As the raw dielectric material was prepared an inner layer electrically;

[0069] Step S2, the raw material and the inner layer an outer layer of dielectric material of the dielectric material were placed in two ball mill jar, then add ethanol and ZrO each mill pot in two 2 Ball as milling media, ZrO 2 Ball mass ratio of the two materi...

Embodiment 2

[0080] A process for preparing lead-free high storage density and storage efficiency of the ceramic dielectric:

[0081] To step S1, in accordance with the formula 0.94Bi 0.55 NA 0.45 TiO 3 -0.06BaTiO 3 (Hereinafter referred to as BNBT) Weigh 40.9673g Bi 2 O 3 , 7.5632g Na 2 CO 3 , 4.0271g BaCO 3 , 27.4423g TiO 2 As the raw dielectric material was prepared outer electrically, and then according to the formula 0.80Bi 0.5 NA 0.5 TiO 3 -0.20SrNb 0.5 Al 0.5 O 3 (Hereinafter referred to as BNTSNA) Weigh 14.3964gBi 2 O 3 , 3.2484g Na 2 CO, 4.5612g SrCO 3 , 9.9714g TiO 2 , 0.7797g Al 2 O 3 And 2.0428g Nb 2 O 5 As the raw dielectric material was prepared an inner layer electrically;

[0082] Step S2, the raw material and the inner layer an outer layer of dielectric material of the dielectric material were placed in two ball mill jar, then add ethanol and ZrO each mill pot in two 2 Ball as milling media, ZrO 2 Ball mass ratio of the two materials is 2: 1, by mass ethanol ratio of the two mat...

Embodiment 3

[0093] A process for preparing lead-free high storage density and storage efficiency of the ceramic dielectric:

[0094] To step S1, in accordance with the formula 0.80Bi 0.5 NA 0.5 TiO 3 -0.20SrNb 0.5 Al 0.5 O 3 (Hereinafter referred to as BNTSNA) Weigh 14.3964g Bi 2 O 3 , 3.2484g Na 2 CO, 4.5612g SrCO 3 , 9.9714g TiO 2 , 0.7797g Al 2 O 3 And 2.0428gNb 2 O 5 As the raw dielectric material was prepared outer electrically, and then according to the formula 0.75Bi 0.52 NA 0.48 TiO 3 -0.25SrTiO 3 (Hereinafter referred to as BNST) Weigh 15.9842g Bi 2 O 3 , 3.3293g Na 2 CO 3 , 6.4927g SrCO 3 , 14.1939g TiO 2 As the raw dielectric material was prepared an inner layer electrically;

[0095] Step S2, the raw material and the inner layer an outer layer of dielectric material of the dielectric material were placed in two ball mill jar, then add ethanol and ZrO each mill pot in two 2 Ball as milling media, ZrO 2 Ball mass ratio of the two materials are 1.5: 1, and ethanol by mass ratio of th...

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Abstract

The invention belongs to the technical field of energy storage ceramic dielectric materials, and provides a lead-free ceramic dielectric with high energy storage density and high energy storage efficiency and a preparation method thereof. The inner layer ceramic powder and the outer layer ceramic powder are synthesized by solid phase reaction , the powder is further made into a ceramic slurry, and the corresponding ceramic membrane is obtained through a tape casting process. The obtained ceramic membrane is pressed under different temperature and pressure conditions, and finally sintered at a high temperature of 1050-1200°C to obtain a layered Sandwich-structured lead-free ceramic dielectric with high energy storage density and high energy storage efficiency, the first and third dielectric layers have high breakdown field strength, and the second dielectric layer has high polarization strength; or the first and third dielectrics layer has high polarization and the second dielectric layer has high breakdown field strength. The invention does not contain lead, has simple preparation process, stable preparation process, is suitable for industrialized batch production, has excellent pressure resistance characteristics, high energy storage density and high efficiency, and simultaneously has the excellent properties of various materials in one body.

Description

Technical field [0001] The present invention belongs to the technical field of energy storage ceramic dielectric material, and more particularly to a ceramic dielectric of lead-free high storage density and high storage efficiency and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of information technology, the requirements for material performance are increasing. The ceramic dielectric capacitor is fast, the power density is high, the power density is high, the cycle life is long, the working temperature range is wide, and the stability is good. It has broad fields such as new energy electric vehicles, laser weapons, smart grids, electromagnetic guns. Application prospects. With the restrictions of lead materials contained in electronic components, it is a current research hotspot with lead-free ceramic dielectric capacitors that can be replaced with lead-based materials. However, the intensity and maximum polarization int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/475C04B35/622C04B35/626B28B1/29B28B11/00B32B9/00B32B9/04B32B18/00
CPCC04B35/475C04B35/622C04B35/6264C04B35/6261C04B35/62655B28B1/29B28B11/003B32B9/005B32B9/04B32B18/00C04B2235/3298C04B2235/3215C04B2235/3201C04B2235/3213C04B2235/3217C04B2235/3232C04B2235/3251C04B2235/3236C04B2235/60B32B2250/40B32B2307/204
Inventor 翟继卫闫非沈波
Owner TONGJI UNIV
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