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Pulse energy storage ceramic material and preparation method thereof

A ceramic material and energy storage technology, which is applied in the field of pulse energy storage ceramic materials and its preparation, can solve the problems of low BDS and low energy storage density, and achieve the effects of stable performance, improved performance, and high electric strength

Pending Publication Date: 2021-03-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Sr 0.35+x K 0.25 Bi 0.35 TiO 3 Ceramics have a lower BDS, resulting in lower energy storage densities

Method used

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  • Pulse energy storage ceramic material and preparation method thereof
  • Pulse energy storage ceramic material and preparation method thereof
  • Pulse energy storage ceramic material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0029] Embodiment 1-7 (does not contain modifying additive)

[0030] A preparation method of a pulse energy storage ceramic material, comprising the following steps:

[0031] first step:

[0032] Sr 0.35+x K 0.25 Bi 0.35 TiO 3 Powder is synthesized; Be respectively 99% strontium carbonate, 99.5% titanium dioxide with purity, 99.5% bismuth trioxide, 99% salt of wormwood as starting material, accurately weigh each raw material of starting material according to the ratio in table 1, control The molar ratio between Sr, K, Bi and Ti is Sr:K:Bi:Ti=(0.35+x):0.25:0.35:1, where 0≤x≤0.05, after mixing uniformly by ball milling at 900~1100℃ Heat preservation and pre-fire for 2 to 4 hours, then cool down with the furnace to obtain Sr 0.35+x K 0.25 Bi 0.35 TiO 3 Powder; the ball milling process is as follows: use zirconia balls as the ball milling medium, use deionized water as the solvent, and carry out ball milling according to the weight ratio of material, balls and water as 1:...

Embodiment 8-17

[0044] Embodiment 8-17 (containing modification additive)

[0045] first step:

[0046] Step 1: Sr 0.35+x K 0.25 Bi 0.35 TiO 3 Synthesis of powder: with the purity of 99% strontium carbonate, 99.5% titanium dioxide, 99.5% bismuth trioxide, and 99% potassium carbonate as starting materials, 45.843g of strontium titanate, 68.919g of titanium dioxide, and bismuth trioxide 70.336g, potassium carbonate 14.902g, control the molar ratio between Sr, K, Bi and Ti to be Sr:K:Bi:Ti=(0.35+x):0.25:0.35:1, wherein x=0.01, ball mill and mix uniformly Afterwards, heat preservation and pre-calcination at 900-1100°C for 2-4 hours, and cool down with the furnace to obtain Sr 0.36 K 0.25 Bi 0.35 TiO 3 Powder;

[0047] The ball milling process is as follows: use zirconia balls as the ball milling medium, use deionized water as the solvent, and perform ball milling for 3 to 12 days according to the weight ratio of material, balls and water as 1:(3~5):(0.5~1). Hour;

[0048] Step two:

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Abstract

The invention provides a pulse energy storage ceramic material and a preparation method thereof. The pulse energy storage ceramic material comprises a main crystalline phase and a modified additive, wherein the chemical general formula of the main crystal phase is Sr<0.35+x>K<0.25>Bi<0.35>TiO<3> y wt.% MgO, x is more than or equal to 0 and less than or equal to 0.05, and y is more than or equal to0.1 and less than or equal to 5, the modification additive is one or more of Er2O3, Nb2O5, Nd2O3, ZnO, MnCO3 and SiO2, and the mass of the modification additive accounts for 0.0-4.0% of the total mass of the whole pulse energy storage ceramic material. Volatile or heavy metals such as Pb and Cd are not contained in the formula, and the surface appearance with the compact structure is obtained through A-site excess and trace doping. Raw materials are sufficient in China and low in price, the cost of the high-performance pulse energy storage ceramic capacitor becomes possible, the performance is greatly improved, the dielectric strength is improved to 305-345 kV / cm from 260 kV / cm, the energy storage density is high, the high energy storage efficiency is suitable for manufacturing a dielectric material of the pulse capacitor, and the manufacturing requirement of the pulse ceramic capacitor can be met.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and relates to a pulse energy storage ceramic material and a preparation method thereof. Background technique [0002] With the sharp increase in energy consumption and the deterioration of the ecological environment around the world, countries have accelerated the extensive development and research of renewable energy technologies such as solar energy, wind energy, thermal energy, etc., in order to reduce or even replace the use of fossil fuel energy. In this context, the development and manufacture of energy storage components that store and provide electrical energy more efficiently have received more extensive attention. Compared with energy storage devices such as electrochemical supercapacitors, lithium batteries and fuel cells, dielectric capacitors have low energy density and high power density, and can release energy in the form of pulse power in a very short time. load. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
CPCC04B35/475C04B35/622C04B2235/3213C04B2235/3201C04B2235/3232C04B2235/3298C04B2235/3206C04B2235/602C04B2235/656C04B2235/6567
Inventor 唐斌赵鹏陈菁菁袁颖钟朝位张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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