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Sn-doped high-entropy perovskite oxide ceramic material with high power density, and preparation method thereof

A perovskite oxide, high power density technology, applied in the field of relaxor ferroelectrics, can solve problems such as environmental damage, reduce waste of resources, reduce the steps of removing binders, and save costs

Active Publication Date: 2020-04-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most relaxor ferroelectrics contain lead, which causes great damage to the environment during preparation and use, so it is necessary to develop lead-free relaxor ferroelectric systems

Method used

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  • Sn-doped high-entropy perovskite oxide ceramic material with high power density, and preparation method thereof
  • Sn-doped high-entropy perovskite oxide ceramic material with high power density, and preparation method thereof
  • Sn-doped high-entropy perovskite oxide ceramic material with high power density, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The chemical formula of this high entropy ceramic material is: (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 1-x sn x o 3 ,in x represents the mole percentage, and x =0.01.

[0030] The above Sn-doped (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 )TiO 3 The preparation method of high entropy ceramic material comprises the following steps:

[0031] (1) According to the chemical formula (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 1-x sn x o 3 ( x =0.01) will analyze pure Na 2 CO 3 、 Bi 2 o 3 、BaCO 3 , SrCO 3 , CaCO 3 、TiO 2 and SnO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and then pre-calcined to obtain a block solid;

[0032] (2) After pulverizing the massive solid, ball milling is carried out again, and the product is sieved to obtain uniform size (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 0.99 sn 0.01 o 3 Powder;

[0033] (3) will get (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 0.99 sn 0.01 o 3 For powde...

Embodiment 2

[0040] The chemical formula of this high entropy ceramic material is: (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 1-x sn x o 3 ,in x represents the mole percentage, and x =0.03.

[0041] The above Sn-doped (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 )TiO 3 The preparation method of high entropy ceramic material comprises the following steps:

[0042] (1) According to the chemical formula (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 1-x sn x o 3 ( x =0.03) will analyze pure Na 2 CO 3 、 Bi 2 o 3 、BaCO 3 , SrCO 3 , CaCO 3 、TiO 2 and SnO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and then pre-calcined to obtain a block solid;

[0043] (2) After pulverizing the massive solid, ball milling is carried out again, and the product is sieved to obtain uniform size (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 0.97 sn 0.03 o 3 Powder;

[0044] (3) will get (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 0.97 sn 0.03 o 3 For powde...

Embodiment 3

[0052] The chemical formula of this high entropy ceramic material is: (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 1-x sn x o 3 ,in x represents the mole percentage, and x =0.05.

[0053] The above Sn-doped (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 )TiO 3 The preparation method of high entropy ceramic material comprises the following steps:

[0054] (1) According to the chemical formula (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 1-x sn x o 3 ( x =0.05) will analyze pure Na 2 CO 3 、Bi 2 o 3 、BaCO 3 , SrCO 3 , CaCO 3 、TiO 2 and SnO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and then pre-calcined to obtain a block solid;

[0055] (2) After pulverizing the massive solid, ball milling is carried out again, and the product is sieved to obtain uniform size (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 0.95 sn 0.05 o 3 Powder;

[0056] (3) will get (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 0.95 sn 0.05 o 3 For the po...

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Abstract

The invention discloses a Sn-doped high-entropy perovskite oxide ceramic material with high power density. The preparation method of the material comprises the following steps: taking Na2CO3, Bi2O3, BaCO3, SrCO3, CaCO3, TiO2 and SnO2 as raw materials according to a chemical formula (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)Ti[1-x]Sn[x]O3, carrying out wet ball-milling mixing on the powder, pre-firing the dried powder at 900 DEG C for 2 hours, carrying out secondary ball-milling, sieving and molding, and finally sintering at 1250 DEG C for 2 hours to obtain the single-phase high-entropy perovskite oxide ceramic material. According to the invention, the high-entropy ceramic material prepared by the invention is simple in preparation process and low in manufacturing cost, the discharge energy storage density can reach 1.74 J / cm<3> and the power density can reach 51.4 MW / cm<3> by selecting a proper x value, and a new lead-free energy storage material matrix is provided.

Description

technical field [0001] The present invention relates to the technical field of relaxor ferroelectrics, in particular to a kind of (Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 ) Ti 1- x sn x o 3 High power density high entropy perovskite oxide ceramic materials, preparation methods and applications. 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. When the development of traditional materials is getting closer to its limit and cannot meet the growing needs of new technologies in various industries, the development of new materials has become particularly important. "High entropy" is a new material desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/465C04B35/468C04B35/47C04B35/475C04B35/622C04B41/88H01G4/12
CPCC04B35/47C04B35/4682C04B35/475C04B35/465C04B35/462C04B35/622C04B41/88C04B41/5116H01G4/1209H01G4/1227H01G4/1218C04B2235/3201C04B2235/3293C04B2235/656C04B2235/6567C04B41/4539C04B41/0072
Inventor 蒲永平张倩雯李润杜欣怡陈敏周世昱宁亚婷
Owner SHAANXI UNIV OF SCI & TECH
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