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Lead-free ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof

A high energy storage density, ceramic material technology, applied in the field of lead-free ceramic materials and its preparation, can solve the problems of uneven grain size distribution, low energy storage density, low energy storage efficiency, etc., and achieve uniform grain size distribution , Improve the energy storage density, improve the effect of energy storage efficiency

Active Publication Date: 2017-12-12
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ba 0.4 Sr 0.6 TiO 3 It is one of the more rational energy storage ceramic material systems at present, but due to Ba 0.4 Sr 0.6 TiO 3 The grain size distribution is not uniform and the grain size is large so that the breakdown electric field is low, resulting in its energy storage density of only 0.3J / cm 3
After adopting various doping modification and spark plasma sintering technology, its energy storage density is still 1.5J / cm 3 Below, and the energy storage efficiency is lower than 80%, it is difficult to meet the needs of practical applications

Method used

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  • Lead-free ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof
  • Lead-free ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof
  • Lead-free ceramic material with high energy storage density and high energy storage efficiency and preparation method thereof

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preparation example Construction

[0031] The preparation method of the lead-free ceramic material with high energy storage density and high energy storage efficiency of the present invention comprises the following steps:

[0032] (1) According to the chemical formula Ba 0.4 Sr 0.6 TiO 3 SrTiO 3 Nano powder (3 Nanopowder (0.4 Sr 0.6 TiO 3 Powder. and SrTiO 3 Nano powder and BaTiO 3 Nano powders were purchased from Beijing Deke Daojin Technology Co., Ltd.

[0033] (2) According to Bi 2 o 3 :B 2 o 3 : SiO 2 = 13:4:3 molar ratio to weigh Bi in turn 2 o 3 , B 2 o 3 and SiO 2 , mixed evenly through ball milling, and the ball milling medium is absolute ethanol, the ball milling time is 12-16 hours, then the temperature is raised to 1200-1300°C and kept for 1-2 hours to obtain a high-temperature melt, and then the obtained high-temperature glass melt is quickly Pour into deionized water to form broken small glass pieces, and finally grind the formed broken small glass pieces to obtain Bi 2 o 3 -B ...

Embodiment 1

[0044] The chemical formula of lead-free ceramic materials with high energy storage density and high energy storage efficiency is: Ba 0.4 Sr 0.6 TiO 3 -x(Bi 2 o 3 -B 2 o 3 -SiO 2 ), where x represents Bi 2 o 3 -B 2 o 3 -SiO 2 The mass percentage of x=3wt%.

[0045] The preparation method of the above-mentioned lead-free ceramic material with high energy storage density and high energy storage efficiency comprises the following steps:

[0046] (1) According to the chemical formula Ba 0.4 Sr 0.6 TiO 3 SrTiO 3 Nano powder (3 Nano powder (0.4 Sr 0.6 TiO 3 Powder.

[0047] (2) According to Bi 2 o 3 :B 2 o 3 : SiO 2 = 13:4:3 molar ratio to weigh Bi in turn 2 o 3 , B 2 o 3 and SiO 2 The raw materials are mixed evenly by ball milling process and heated to 1200°C for 2 hours to obtain a high-temperature glass melt, and then the obtained high-temperature glass melt is quickly poured into deionized water to form broken glass pieces, and finally the formed brok...

Embodiment 2

[0055] The chemical formula of lead-free ceramic materials with high energy storage density and high energy storage efficiency is: Ba 0.4 Sr 0.6 TiO 3 -x(Bi 2 o 3 -B 2 o 3 -SiO 2 ), where x represents Bi 2 o 3 -B 2 o 3 -SiO 2 The mass percent of x=6wt%.

[0056]The preparation method of the above-mentioned lead-free ceramic material with high energy storage density and high energy storage efficiency comprises the following steps:

[0057] (1) According to the chemical formula Ba 0.4 Sr 0.6 TiO 3 SrTiO 3 Nano powder (3 Nano powder (0.4 Sr 0.6 TiO 3 Powder.

[0058] (2) According to Bi 2 o 3 :B 2 o 3 : SiO 2 = 13:4:3 molar ratio to weigh Bi in turn 2 o 3 , B 2 o 3 and SiO 2 The raw materials are mixed evenly by ball milling process and then heated to 1270°C for 1.5 hours to obtain a high-temperature glass melt, and then the obtained high-temperature glass melt is quickly poured into deionized water to form broken glass pieces, and finally the formed b...

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Abstract

The invention relates to a lead-free ceramic material with high energy storage density and high energy storage efficiency and a preparation method thereof. According to the method, firstly, proportioning is performed according to a chemical formula of Ba0.4Sr0.6TiO3-x(Bi2O3-B2O3-SiO2), wherein the x is the mass percent of Bi2O3-B2O3-SiO2, and the x is greater than or equal to 3 weight percent and is smaller than or equal to 12 weight percent; through ball milling and drying, raw material powder is obtained; the obtained raw material powder is pressed into sheets; sintering is performed at 1300 to 1350 DEG C; the lead-free ceramic material with high energy storage density and high energy storage efficiency can be obtained. The lead-free ceramic material has the advantages that the preparation process is simple and stable, and is suitable for industrial production; the energy storage characteristic is excellent; the energy storage density calculated based on a ferroelectric hysteresis loop is 1.73 to 1.98J / cm<3>; the energy storage efficiency is 90 percent or higher.

Description

technical field [0001] The invention relates to the technical field of dielectric materials for energy storage capacitors, in particular to a lead-free ceramic material with high energy storage density and high energy storage efficiency and a preparation method thereof. Background technique [0002] At present, advanced energy storage materials, as an important part of new materials, play an increasingly important role in various electric and electronic systems. At the same time, with the rapid development of information technology, various electronic devices are developing in the direction of miniaturization and integration. Therefore, as one of the electronic components widely used in electronic equipment, capacitors must have more excellent performance. Compared with polymer energy storage materials, ceramic energy storage materials have the characteristics of high dielectric constant, low dielectric loss, slow aging speed, good mechanical properties and temperature stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622C03C3/064C04B41/88
CPCC03C3/064C04B35/468C04B35/622C04B41/009C04B41/5116C04B41/88C04B2235/3213C04B2235/36C04B2235/785C04B2235/96
Inventor 杨海波闫非林营
Owner SHAANXI UNIV OF SCI & TECH
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