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A kind of Zr-doped barium sodium niobate high breakdown strength tungsten bronze structure ceramic material and preparation method thereof

A high breakdown strength, ceramic material technology, applied in the field of tungsten bronze structural ceramic materials, can solve the problem of low breakdown strength, and achieve the effects of improving breakdown strength, saving costs, and reducing grain size

Active Publication Date: 2022-04-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of Zr-doped barium sodium niobate high breakdown strength tungsten bronze structure ceramic material and preparation method thereof
  • A kind of Zr-doped barium sodium niobate high breakdown strength tungsten bronze structure ceramic material and preparation method thereof
  • A kind of Zr-doped barium sodium niobate high breakdown strength tungsten bronze structure ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The chemical formula of the tungsten bronze structural ceramic material is: Ba 2 Na(Nb 1-x Zr x ) 5 O 15 ,in x represents mole percent, and x =0.

[0033] The preparation method of the above-mentioned Zr-doped barium sodium tungsten tungsten bronze structure ceramic material comprises the following steps:

[0034] (1) According to the chemical formula Ba 2 Na(Nb 1-x Zr x ) 5 O 15 ( x =0) will be analytically pure BaCO 3 , Na 2 CO 3 , Nb 2 O 5 and ZrO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and pre-fired to obtain block solids;

[0035] (2) After pulverizing the block solids, ball milling is performed again, and the product is sieved to obtain Ba of uniform size. 2 NaNb 5 O 15 powder;

[0036] (3) Ba will be obtained 2 NaNb 5 O 15 The powder is weighed with a mass of 0.4-0.45g per part, and then poured into the mold, and a force of 600N is applied to demold the formed wafer to obtain a sample with good shap...

Embodiment 2

[0043] The chemical formula of the tungsten bronze structural ceramic material is: Ba 2 Na(Nb 1-x Zr x ) 5 O 15 ,in x represents mole percent, and x =0.1.

[0044] The preparation method of the above-mentioned Zr-doped barium sodium tungsten tungsten bronze structure ceramic material comprises the following steps:

[0045] (1) According to the chemical formula Ba 2 Na(Nb 1-x Zr x ) 5 O 15 ( x = 0.1) will be analytically pure BaCO 3 , Na 2 CO 3 , Nb 2 O 5 and ZrO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and pre-fired to obtain block solids;

[0046] (2) After pulverizing the block solids, ball milling is performed again, and the product is sieved to obtain Ba of uniform size. 2 Na(Nb 0.9 Zr 0.1 ) 5 O 15 powder;

[0047] (3) Ba will be obtained 2 Na(Nb 0.9 Zr 0.1 ) 5 O 15 The powder is weighed with a mass of 0.4-0.45g per part, and then poured into the mold, and a force of 600N is applied to demold the formed wa...

Embodiment 3

[0054] The chemical formula of the tungsten bronze structural ceramic material is: Ba 2 Na(Nb 1-x Zr x ) 5 O 15 ,in x represents mole percent, and x =0.15.

[0055] The preparation method of the above-mentioned Zr-doped barium sodium tungsten tungsten bronze structure ceramic material comprises the following steps:

[0056] (1) According to the chemical formula Ba 2 Na(Nb 1-x Zr x ) 5 O 15 ( x = 0.15) will be analytically pure BaCO 3 , Na 2 CO 3 , Nb 2 O 5 and ZrO 2 After preparation, it is uniformly mixed by ball milling, then dried, sieved, and pre-fired to obtain block solids;

[0057] (2) After pulverizing the block solids, ball milling is performed again, and the product is sieved to obtain Ba of uniform size. 2 Na(Nb 0.85 Zr 0.15 ) 5 O 15 powder;

[0058] (3) Ba will be obtained 2 Na(Nb 0.85 Zr 0.15 ) 5 O 15 The powder is weighed with a mass of 0.4-0.45g per part, and then poured into the mold, and a force of 600N is applied to demold the for...

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Abstract

A Zr-doped sodium barium niobate high breakdown strength tungsten bronze structure ceramic material. The preparation method of the material is as follows: firstly, BaCO 3 、Na 2 CO 3 , Nb 2 o 5 and ZrO 2 As raw material, according to chemical formula Ba 2 Na(Nb 1‑x Zr x ) 5 o 15 ( x =0, 0.1, 0.15, 0.2, 0.25) proportioning and taking, the powder was mixed by wet ball milling, and the dried powder was pre-fired at 1000°C for 2 hours, and then passed through secondary ball milling, sieving and molding. Finally, the desired tungsten bronze structure ceramic material was obtained by sintering at 1300℃ for 2 h. The preparation process of the present invention is simple, the raw material price is low, and the production cost is low. In the ferroelectric performance test, with the increase of Zr doping amount, the breakdown strength of the material is significantly improved. When x =0.25, its breakdown strength reaches 250 kV / cm, which is conducive to the improvement of its energy storage density.

Description

technical field [0001] The invention belongs to the technical field of tungsten bronze structural ceramic materials. 2 NaNb 5 O 15 A tungsten bronze structural ceramic material with high breakdown strength in a matrix and a 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" are put forward for energy storage dielectric capacitors. However, the performance of energy storage dielectric capacitors mainly depends on the energy storage dielectric material used. With the development demand for miniaturization of pulsed power sources, the development of solid-state energy storage medium materials has received increasing attention. Among them, ceramic dielectric materials have high dielectric constant, but generally low breakdown strength, and in a single material, it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/622C04B41/88
CPCC04B35/495C04B35/622C04B41/88C04B41/5116C04B41/009C04B2235/3215C04B2235/3201C04B2235/3244
Inventor 蒲永平李润张倩雯杜欣怡陈敏张贤
Owner SHAANXI UNIV OF SCI & TECH