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Bi0.5Na0.4Li0.1MxTi1-xO3 unleaded antiferroelectric high energy density ceramic and preparation method thereof

A high-energy-storage-density, anti-ferroelectric technology is applied in the field of energy-storage ceramic capacitor manufacturing, which can solve problems such as application in the field of lead refugees, and achieve the effects of simple preparation method and high energy-storage density.

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

AI Technical Summary

Problems solved by technology

However, the energy storage ceramic system is mainly lead-based antiferroelectric materials. However, the high toxicity of lead also means that it is difficult to apply in the civilian field, so it is necessary to find new lead-free antiferroelectric materials with high energy storage density as energy storage Fabrication of substrates for energy ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Synthesize Bi using traditional powder synthesis technology 0.5 Na 0.4 Li 0.1 (Mg 1 / 3 Nb 2 / 3 ) 0.03 Ti 0.97 o 3 Powder: Choose Bi with high purity (≧99.8%) 2 o 3 、Na 2 CO 3 , Li 2 CO 3 , MgO, Nb 2 o 5 、TiO 2 Powder as raw material, according to Bi 2 o 3 : Na 2 CO 3 : Li 2 CO 3 :MgO:Nb 2 o 5 : TiO 2 = 0.25: 0.2: 0.05: 0.01: 0.01: 0.97 molar ratio mixed, then fully mixed in a high-energy ball mill, taken out and dried.

[0014] (2) Grinding and incubating at 900°C for 4 hours to synthesize Bi 0.5 Na 0.4 Li 0.1 (Mg 1 / 3 Nb 2 / 3 ) 0.03 Ti 0.97 o 3 Powder.

[0015] (3) Ball mill the composite powder obtained in (2) to obtain a uniformly dispersed powder, then put it into the graphite abrasive tool of the high-temperature and high-pressure sintering furnace, pressurize it to 80MPa, and then rapidly raise the temperature of the high-temperature and high-pressure sintering furnace to 800°C And keep it warm for 3 minutes to prepare Bi 0.5 Na...

Embodiment 2

[0018] (1) Synthesize Bi using traditional powder synthesis technology 0.5 Na 0.4 Li 0.1 (Mg 1 / 3 Nb 2 / 3 ) 0.3 Ti 0.7 o 3 Powder: Choose Bi with high purity (≧99.8%) 2 o 3 、Na 2 CO 3 , Li 2 CO 3 , MgO, Nb 2 o 5 、TiO 2 Powder as raw material, according to Bi 2 o 3 : Na 2 CO 3 : Li 2 CO 3 :MgO:Nb 2 o 5 : TiO 2 = 0.25: 0.2: 0.05: 0.1: 0.1: 0.7 molar ratio mixing, and then fully mixed in a high-energy ball mill, taken out and dried.

[0019] (2) Grinding and incubating at 1000°C for 2 hours to synthesize Bi 0.5 Na 0.4 Li 0.1 (Mg 1 / 3 Nb 2 / 3 ) 0.3 Ti 0.7 o 3 Powder.

[0020] (3) Ball mill the composite powder obtained in (2) to obtain a uniformly dispersed powder, then put it into the graphite abrasive tool of the high-temperature and high-pressure sintering furnace, pressurize it to 50MPa, and then rapidly raise the temperature of the high-temperature and high-pressure sintering furnace to 900°C And keep it warm for 5 minutes to prepare Bi 0.5 Na ...

Embodiment 3

[0023] (1) Synthesize Bi using traditional powder synthesis technology 0.5 Na 0.4 Li 0.1 (Mg 1 / 3 Nb 2 / 3 ) 0.24 Ti 0.76 o 3 Powder: Choose Bi with high purity (≧99.8%) 2 o 3 、Na 2 CO 3 , Li 2 CO 3 , MgO, Nb 2 o 5 、TiO 2 Powder as raw material, according to Bi 2 o 3 : Na 2 CO 3 : Li 2 CO 3 :MgO:Nb 2 o 5 : TiO 2 = 0.25: 0.2: 0.05: 0.08: 0.08: 0.76 molar ratio mixed, then fully mixed in a high-energy ball mill, taken out and dried.

[0024] (2) Grinding and incubating at 1000°C for 2 hours to synthesize Bi 0.5 Na 0.4 Li 0.1 (Mg 1 / 3 Nb 2 / 3 ) 0.24 Ti 0.76 o 3 Powder.

[0025] (3) Ball mill the composite powder obtained in (2) to obtain a uniformly dispersed powder, then put it into the graphite abrasive tool of the high-temperature and high-pressure sintering furnace, pressurize it to 50MPa, and then rapidly raise the temperature of the high-temperature and high-pressure sintering furnace to 900°C And keep it warm for 5 minutes to prepare Bi 0.5 Na...

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Abstract

The invention relates to a Bi0.5Na0.4Li0.1MxTi1-xO3 unleaded antiferroelectric high energy density ceramic and a preparation method thereof. X satisfies the relation of 0.03<= x<=0.3; M is one of (Me1 / 3Nb2 / 3), (Mb1 / 2Nb1 / 2), (Me1 / 3Ta2 / 3) and (Mb1 / 2Ta1 / 2); Me in (Me1 / 3Nb2 / 3), (Mb1 / 2Nb1 / 2), (Me1 / 3Ta2 / 3) and (Mb1 / 2Ta1 / 2) represents one of Mg, Zn and Ni; and Mb in (Me1 / 3Nb2 / 3), (Mb1 / 2Nb1 / 2), (Me1 / 3Ta2 / 3) and (Mb1 / 2Ta1 / 2) represents one of Al, Co and Cr. The method employs a high temperature and pressure sintering furnace for preparing the Bi0.5Na0.4Li0.1MxTi1-xO3 unleaded antiferroelectric high energy density ceramic, which has energy density calculated based on the ferroelectric hysteresis loop up to 0.8-1.6 J / cm<3>.

Description

technical field [0001] The invention belongs to the field of energy storage ceramic capacitor manufacturing, in particular to a Bi 0.5 Na 0.4 Li 0.1 m x Ti 1-x o 3 Lead-free antiferroelectric high energy storage density ceramics and a preparation method thereof. Background technique [0002] High-density energy storage capacitors have the advantages of high energy storage density, fast charge and discharge speed, anti-cycle aging, suitable for extreme environments such as high temperature and high pressure, and stable performance. They meet the requirements of new energy development and utilization, and are widely used in electronic power equipment. It plays an increasingly important role in the pulse power system, especially the large beam excitation system generated by high-energy laser. [0003] Among the high-density energy storage capacitors currently researched and developed, there are three types of ceramics, glass and ceramic organic composites. However, the en...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622
Inventor 袁昌来周星星刘笑冯琴周昌荣杨涛许积文黎清宁陈国华
Owner GUILIN UNIV OF ELECTRONIC TECH
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