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Rex/3(Ba0.06Bi0.47Na0.47)1-xTi1-xRxO3 leadless antiferroelectric ceramic with high energy density and preparation method thereof

A high energy storage density, antiferroelectric technology, applied in the field of Rex/31-xTi1-xRxO3 lead-free antiferroelectric ceramics and their preparation, can solve problems such as health threats

Active Publication Date: 2015-09-30
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But currently the main antiferroelectric materials are concentrated on lead zirconate titanate (PZT), and lead oxide, the main raw material in PZT-based materials, is a highly toxic substance that seriously threatens our health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Using traditional powder synthesis technology to synthesize La 0.02 / 3 Ba 0.0588 Bi 0.4606 Na 0.4606 Ti 0.98 Nb 0.02 o 3 Powder: choose La with high purity (≧99.8%) 2 o 3 、BaCO 3 、 Bi 2 o 3 、Na 2 CO 3 , Nb 2 o 5 、TiO 2 Powder as raw material, according to La 2 o 3 : BaCO 3 : Bi 2 o 3 : Na 2 CO 3 : Nb 2 o 5 : TiO 2 =0.02 / 6:0.0588:0.2303:0.2303:0.01:0.98 molar ratio mixed, then fully mixed in a high-energy ball mill, taken out and dried.

[0016] (2) Grinding and incubating at 900°C for 6 hours to synthesize La 0.02 / 3 Ba 0.0588 Bi 0.4606 Na 0.4606 Ti 0.98 Nb 0.02 o 3 compound, ground again to obtain La 0.02 / 3 Ba 0.0588 Bi 0.4606 Na 0.4606 Ti 0.98 Nb 0.02 o 3 Disperse the powder evenly.

[0017] (3) Put the powder obtained in (2) into the graphite grinding tool of the plasma discharge sintering furnace, pressurize to 30M

[0018] Pa, and then the plasma discharge sintering furnace was rapidly heated to 900 ° C and kept fo...

Embodiment 2

[0021] (1) Using traditional powder synthesis technology to synthesize La 0.2 / 3 Ba 0.048 Bi 0.376 Na 0.376Ti 0.8 Nb 0.2 o 3 Powder: choose La with high purity (≧99.8%) 2 o 3 、BaCO 3 、 Bi 2 o 3 、Na 2 CO 3 , Nb 2 o 5 、TiO 2 Powder as raw material, according to La 2 o 3 : BaCO 3 : Bi 2 o 3 : Na 2 CO 3 : Nb 2 o 5 : TiO 2 = 0.2 / 6:0.048: 0.188: 0.188: 0.1: 0.8 molar ratio mixed, then fully mixed in a high-energy ball mill, taken out and dried.

[0022] (2) Grinding and incubating at 1100°C for 2 hours to synthesize La 0.2 / 3 Ba 0.048 Bi 0.376 Na 0.376 Ti 0.8 Nb 0.2 o 3 compound, ground again to obtain La 0.2 / 3 Ba 0.048 Bi 0.376 Na 0.376 Ti 0.8 Nb 0.2 o 3 Disperse the powder evenly.

[0023] (3) Put the powder obtained in (2) into the graphite grinding tool of the plasma discharge sintering furnace, pressurize it to 50MPa, then rapidly raise the temperature of the plasma discharge sintering furnace to 1000°C and keep it warm for 5 minutes, that ...

Embodiment 3

[0026] (1) Using traditional powder synthesis technology to synthesize La 0.1 / 3 Ba 0.054 Bi 0.423 Na 0.423 Ti 0.9 Nb 0.1 o 3 Powder: choose La with high purity (≧99.8%) 2 o 3 、BaCO 3 、 Bi 2 o 3 、Na 2 CO 3 , Nb 2 o 5 、TiO 2 Powder as raw material, according to La 2 o 3 : BaCO 3 : Bi 2 o 3 : Na 2 CO 3 : Nb 2 o 5 : TiO 2 = 0.1 / 6:0.054: 0.2115: 0.2115: 0.05:0.9 molar ratio mixed, then fully mixed in a high-energy ball mill, taken out and dried.

[0027] (2) Grinding and incubating at 940°C for 4 hours to synthesize La 0.1 / 3 Ba 0.054 Bi 0.423 Na 0.423 Ti 0.9 Nb 0.1 o 3 compound, ground again to obtain La 0.1 / 3 Ba 0.054 Bi 0.423 Na 0.423 Ti 0.9 Nb 0.1 o 3 Disperse the powder evenly.

[0028] (3) Put the powder obtained in (2) into the graphite grinding tool of the plasma discharge sintering furnace, pressurize to 40MPa, then rapidly raise the temperature of the plasma discharge sintering furnace to 950°C and keep it warm for 15 minutes, that i...

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Abstract

The invention relates to Rex / 3(Ba0.06Bi0.47Na0.47)1-xTi1-xRxO3 leadless antiferroelectric ceramic with high energy density and a preparation method thereof. x is greater than or equal to 0.02 and is less than or equal to 0.2, Re is one of La, Sm, Nd, Gd, Dy, Er and Y and R is one of Nb and Ta. Rex / 3(Ba0.06Bi0.47Na0.47)1-xTi1-xRxO3 powder is synthesized by a traditional powder synthesis technology and Rex / 3(Ba0.06Bi0.47Na0.47)1-xTi1-xRxO3 leadless antiferroelectric ceramic is prepared by a spark plasma sintering (SPS) technology. Energy density of the Rex / 3(Ba0.06Bi0.47Na0.47)1-xTi1-xRxO3 leadless antiferroelectric ceramic with high energy density is calculated based on ferroelectric hysteresis loop and is in a range of 0.5-1.5J / cm<3>.

Description

technical field [0001] The invention belongs to the field of energy storage ceramic capacitor manufacturing, in particular to a Re with high energy storage density x / 3 (Ba 0.06 Bi 0.47 Na 0.47 ) 1-x Ti 1-x R x o 3 Lead-free antiferroelectric ceramics and preparation method thereof. Background technique [0002] High-density energy storage capacitors play a very important role in power and electronic systems. With the further development of pulse power supplies, higher requirements are placed on the energy storage density of capacitors. The key to improving the energy storage characteristics of capacitors is to develop Dielectric material with high energy storage density. [0003] Antiferroelectric materials have gradually become excellent candidates for high-density energy storage capacitors due to their high energy storage density. Its high application value also makes the research on antiferroelectric materials become a research hotspot at home and abroad. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/475C04B35/622
Inventor 袁昌来周星星冯琴杨涛周昌荣许积文黎清宁陈国华
Owner GUILIN UNIV OF ELECTRONIC TECH
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