Barium strontium titanate-based ceramic with high energy storage density and power density and preparation method thereof

A high energy storage density, barium strontium titanate technology, applied in the preparation of barium strontium titanate based ceramics, barium strontium titanate based ceramics with high energy storage density and power density and its preparation, can solve irreplaceable, energy storage Low density and other problems, to achieve the effect of improving compactness, high application value, and fast charging and discharging speed

Active Publication Date: 2022-07-15
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy storage density of most barium strontium titanate-based ceramics is still low (3 ), which still cannot replace lead-based ceramic materials

Method used

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  • Barium strontium titanate-based ceramic with high energy storage density and power density and preparation method thereof
  • Barium strontium titanate-based ceramic with high energy storage density and power density and preparation method thereof
  • Barium strontium titanate-based ceramic with high energy storage density and power density and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A high energy storage density and power density barium strontium titanate-based ceramic chemical composition is (1-x)Ba 0.6 Sr 0.4 TiO 3 -xNaNbO 3 , where x=0.10, the following steps are specifically adopted:

[0035] (1) Select BaCO with a purity greater than 98% 3 Powder, SrCO 3 Powder, TiO 2 Powder, NaCO 3 Powder and Nb 2 O 5 Powder is the raw material, according to the chemical formula 0.90Ba 0.6 Sr 0.4 TiO 3 -0.10NaNbO 3 Weigh the raw materials, add the same amount of anhydrous ethanol as the powder, and mix evenly through a ball milling process to make the powder evenly mixed to form a slurry. In one of the ball milling, anhydrous ethanol and ZrO were used 2 The ball is used as the ball milling medium, the rotation speed is 225r / min, the running direction is adjusted every half an hour, and the ball milling time is 12h.

[0036] (2) baking the above-mentioned slurry in a constant temperature oven at 90°C, removing absolute ethanol, and grinding in a ...

Embodiment 2

[0043] A high energy storage density and power density barium strontium titanate-based ceramic chemical composition is (1-x)Ba 0.6 Sr 0.4 TiO 3 -xNaNbO 3 , where x=0.15, the following steps are specifically adopted:

[0044] (1) Select BaCO with a purity greater than 98% 3 Powder, SrCO 3 Powder, TiO 2 Powder, NaCO 3 Powder and Nb 2 O 5 Powder is the raw material, according to the chemical formula 0.85Ba 0.6 Sr 0.4 TiO 3 -0.15NaNbO 3 Weigh the raw materials, add the same amount of anhydrous ethanol as the powder, and mix evenly through a ball milling process to make the powder evenly mixed to form a slurry. In one of the ball milling, anhydrous ethanol and ZrO were used 2 The ball is used as the ball milling medium, the rotation speed is 225r / min, the running direction is adjusted every half an hour, and the ball milling time is 12h.

[0045] (2) baking the above-mentioned slurry in a constant temperature oven at 90°C, removing absolute ethanol, and grinding in a ...

Embodiment 3

[0058] A high energy storage density and power density barium strontium titanate-based ceramic chemical composition is (1-x)Ba 0.6 Sr 0.4 TiO 3 -xNaNbO 3 , where x=0.20, the following steps are specifically adopted:

[0059] (1) Select BaCO with a purity greater than 98% 3 Powder, SrCO 3 Powder, TiO 2 Powder, NaCO 3 Powder and Nb 2 O 5 Powder is the raw material, according to the chemical formula 0.80Ba 0.6 Sr 0.4 TiO 3 -0.20NaNbO 3 Weigh the raw materials, add the same amount of anhydrous ethanol as the powder, and mix evenly through a ball milling process to make the powder evenly mixed to form a slurry. In one of the ball milling, anhydrous ethanol and ZrO were used 2 The ball is used as the ball milling medium, the rotation speed is 225r / min, the running direction is adjusted every half an hour, and the ball milling time is 12h.

[0060] (2) baking the above-mentioned slurry in a constant temperature oven at 90°C, removing absolute ethanol, and grinding in a ...

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Abstract

The invention relates to barium strontium titanate-based ceramics with high energy storage density and power density and a preparation method thereof, and belongs to the field of electrical energy storage materials. Using a solid-phase synthesis method, the paraelectric material Ba 0.6 Sr 0.4 TiO 3 based on the incorporation of a certain molar ratio of NaNbO 3 Antiferroelectric material, a new type of composite ceramic is obtained, and its chemical formula is (1‑x)Ba 0.6 Sr 0.4 TiO 3 ‑xNaNbO 3 , where 0.10≤x≤0.25. The main performance parameters of the energy storage ceramic material obtained by the present invention can restore the energy storage density W rec =6.09J / cm 3 , the energy storage efficiency η=87.4%, under the electric field of 360kV / cm, the power density P D =221.7MW / cm 3 , the current density can reach 1231.42A / cm 2 , the energy storage performance is greatly improved compared with the existing products. In addition, the technological process is simple, suitable for industrial production, and at the same time meets the current lead-free environmental protection requirements.

Description

technical field [0001] The invention relates to a strontium barium titanate-based ceramic with high energy storage density and power density and a preparation method thereof, in particular to a kind of antiferroelectric NaNbO doped with 3 The preparation of barium strontium titanate-based ceramics belongs to the field of dielectric energy storage materials. Background technique [0002] At present, the main electrical energy storage devices are batteries, dielectric capacitors and electrochemical capacitors. These energy storage devices have distinct differences in energy density and power density, which are caused by their different energy storage mechanisms and charge-discharge processes. Compared with other energy storage devices, dielectric capacitors can release electrical energy in a very short time period (nanosecond to microsecond level) and generate huge pulse current or voltage, which also makes dielectric capacitors. It has great potential for application in pul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/638
CPCC04B35/468C04B35/622C04B35/638C04B2235/3213C04B2235/3251C04B2235/3201C04B2235/602C04B2235/6562C04B2235/6567
Inventor 郑鹏李成伟白王峰郑梁张阳
Owner HANGZHOU DIANZI UNIV
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