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MgO-added 0.45BCTZS-0.55BNT high-energy-storage-density ceramic material and preparation method therefor

A technology of 0.45BCTZS-0.55BNT, 0.45bctzs-0.55bnt-xwt%mgo, applied in the field of electronic ceramics, can solve problems such as difficult to meet the requirements of practical applications, achieve uniform microscopic morphology, improve breakdown strength, increase Effect of grain boundary resistance

Inactive Publication Date: 2017-03-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The maximum polarization strength of 0.45BCTZS-0.55BNT ceramics is as high as 30.58μC / cm 2 , but its breakdown strength is only 13.02kV / mm, and its energy storage density is only 1.21J / cm 3 , it is difficult to meet the requirements of practical application

Method used

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  • MgO-added 0.45BCTZS-0.55BNT high-energy-storage-density ceramic material and preparation method therefor
  • MgO-added 0.45BCTZS-0.55BNT high-energy-storage-density ceramic material and preparation method therefor
  • MgO-added 0.45BCTZS-0.55BNT high-energy-storage-density ceramic material and preparation method therefor

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Embodiment 1

[0029] The preparation method of the 0.45BCTZS-0.55BNT high energy storage density ceramic material that adds MgO, according to chemical formula Ba 0.85 Ca 0.15 Ti 0.85 Zr 0.1 sn 0.05 o 3 (BCTZS), mix barium carbonate, calcium carbonate, titanium dioxide, tin dioxide and zirconia evenly, and then keep warm at 1260°C for 2 hours to synthesize BCTZS ceramic powder, according to the chemical formula Bi 0.5 Na 0.5 TiO 3 (BNT), sodium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and then kept at 840°C for 4h to synthesize BNT ceramic powder. Mix BCTZS ceramic powder, BNT ceramic powder and MgO according to the chemical formula 0.45BCTZS-0.55BNT-3wt%MgO, use deionized water as the ball milling medium and ball mill for 6 hours to mix evenly, then dry at 80°C, granulate and shape Finally, it is sintered into porcelain at 1180°C for 2 hours.

Embodiment 2

[0031] The preparation method of the 0.45BCTZS-0.55BNT high energy storage density ceramic material that adds MgO, according to chemical formula Ba 0.85 Ca 0.15 Ti 0.85 Zr 0.1 sn 0.05 o 3 (BCTZS), mix barium carbonate, calcium carbonate, titanium dioxide, tin dioxide and zirconia evenly and then keep warm at 1250°C for 3h to synthesize BCTZS ceramic powder, according to the chemical formula Bi 0.5 Na 0.5 TiO 3 (BNT), sodium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and then kept at 850°C for 5h to synthesize BNT ceramic powder. Mix BCTZS ceramic powder, BNT ceramic powder and MgO according to the chemical formula 0.45BCTZS-0.55BNT-3.5wt% MgO, use deionized water as the ball milling medium and ball mill for 7 hours to mix evenly, then dry at 85°C, granulate, After molding, it is sintered into porcelain at 1150°C for 4 hours.

Embodiment 3

[0033] The preparation method of the 0.45BCTZS-0.55BNT high energy storage density ceramic material that adds MgO, according to chemical formula Ba 0.85 Ca 0.15 Ti 0.85 Zr 0.1 sn 0.05 o 3 (BCTZS), mix barium carbonate, calcium carbonate, titanium dioxide, tin dioxide and zirconia evenly and then keep warm at 1270°C for 4h to synthesize BCTZS ceramic powder, according to the chemical formula Bi 0.5 Na 0.5 TiO 3 (BNT), sodium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and then kept at 830°C for 5.5h to synthesize BNT ceramic powder. Mix BCTZS ceramic powder, BNT ceramic powder and MgO according to the chemical formula 0.45BCTZS-0.55BNT-4wt%MgO, use deionized water as the ball milling medium and ball mill for 8 hours to mix evenly, then dry at 90°C, granulate and shape Finally, it is sintered into porcelain at 1160°C for 6 hours.

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Abstract

The invention relates to a MgO-added 0.45BCTZS-0.55BNT high-energy-storage-density ceramic material and a preparation method therefor. The preparation method comprises the steps of firstly, proportioning BCTZS ceramic powder, BNT ceramic powder and magnesia powder according to the stoichiometric ratio of a chemical formula, i.e., 0.45BCTZS-0.55BNT-xwt%MgO, carrying out uniform mixing, then, carrying out granulating and forming, carrying out heat preservation for 2 to 6 hours at the temperature of 1,150 DEG C to 1,200 DEG C, and carrying out sintered ceramic forming, thereby obtaining the high-energy-storage-density ceramic material, wherein the numeric area of x is 3 to 7. According to the ceramic material and the preparation method therefor, MgO is added into 0.45BCTZS-0.55BNT by adopting a solid-phase method so as to improve the breakdown strength of the 0.45BCTZS-0.55BNT, and thus, the ceramic material with high energy storage density is obtained; and by adding the MgO, the dielectric loss of the ceramic material is effectively lowered, and the grain-boundary resistance is improved. Meanwhile, the diffusion rate of the MgO in ceramics is relatively low, so that excessive MgO is accumulated at grain boundaries, and the growth of crystal grains can be effectively inhibited.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of electronic ceramics, and in particular relates to a 0.45BCTZS-0.55BNT high energy storage density ceramic material added with MgO and a preparation method thereof. [0003] 【Background technique】 [0004] Ceramic energy storage capacitors have the advantages of high power density, fast charging and discharging speed, anti-cycle aging, suitable for extreme environments such as high temperature and high pressure, and stable performance. They meet the requirements of energy utilization in the new era and play an increasingly important role in power and electronic systems. important role. Energy storage capacitors are an indispensable part of new energy power generation systems such as solar energy and wind energy, as well as inverter equipment for hybrid electric vehicles. 40%; In terms of military applications, loads such as tanks, electromagnetic guns, directed energy weapons, electrified launch platforms, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
CPCC04B35/475C04B35/622C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3215C04B2235/3244C04B2235/3293C04B2235/96
Inventor 蒲永平姚谋腾高淑雅
Owner SHAANXI UNIV OF SCI & TECH
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