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A kind of bczt-based energy storage ceramic material and preparation method thereof

A ceramic material and energy storage technology, which is applied in vehicle energy storage, transportation and packaging, electric vehicles, etc., can solve the problems of large dielectric loss, low energy storage density and energy storage efficiency, and achieve improved energy storage density and impact Good penetration field strength and repeatability

Active Publication Date: 2022-05-20
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

BCZT is a ferroelectric phase at room temperature, the dielectric loss is large, and the dielectric constant decreases with the increase of the electric field, so its energy storage density and energy storage efficiency are relatively low

Method used

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  • A kind of bczt-based energy storage ceramic material and preparation method thereof
  • A kind of bczt-based energy storage ceramic material and preparation method thereof
  • A kind of bczt-based energy storage ceramic material and preparation method thereof

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preparation example Construction

[0031] The invention discloses a preparation method of a BCZT-based energy storage ceramic material, which specifically comprises the following steps:

[0032] (1), adopt solid phase synthesis (Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 ) 1-x (BiMg 0.6667 Nb 0.3333 o 3 ) x Powder, wherein x=0-0.1, x is the number of moles.

[0033] (2) Grinding the product obtained in step (1), adding 3wt%-8wt% binder to granulate, and pressing to obtain a plain embryo.

[0034] (3) Elevate the product obtained in step (2) to 600°C-800°C at a heating rate of 1-3°C / min and keep it warm for 3-5 hours to remove the organic matter in the plain embryo to obtain the raw material embryo body.

[0035] (4) The product obtained in step (3) is raised to 1250° C.-1380° C. at a heating rate of 2-4° C. / min for 4-5 hours for sintering to obtain the BCZT-based energy storage ceramic.

Embodiment 1

[0038] The chemical formula of the present embodiment BCZT base energy storage ceramic material is (Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 ) 1-x (BiMg 0.666 Nb 0.333 o 3 ) x , where x=0.025, where x is the number of moles.

[0039] Its preparation process is as follows:

[0040] 1. First BaCO 3 , CaCO 3 , ZrO 2 、 Bi 2 o 3 , MgO, Nb 2 o 5 、TiO2 The seven raw materials were incubated in an oven at 120°C for 12 hours. As an example, the above raw materials may be used, for example, with a purity of 99%.

[0041] 2. Weigh the raw materials obtained in step 1 according to the stoichiometric ratio, and pour them into a ball mill jar.

[0042] 3. Put the raw materials obtained in step 2 into a planetary ball mill for a ball milling according to the mass ratio of raw materials: zirconium balls: absolute ethanol of 1:1:2, and the ball milling time is 12 hours.

[0043] 4. Pour the product of step 3 into a petri dish, put it into a 60°C oven for drying, and then sieve it w...

Embodiment 2

[0053] The chemical formula of the present embodiment BCZT base energy storage ceramic material is (Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 ) 1-x (BiMg 0.666 Nb 0.333 o 3 ) x , where x=0.05, where x is the number of moles.

[0054] Its preparation process is as follows:

[0055] 1. First BaCO 3 , CaCO 3 , ZrO 2 、 Bi 2 o 3 , MgO, Nb 2 o 5 、TiO 2 The seven raw materials were incubated in an oven at 120°C for 12 hours. As an example, the above raw materials may be used, for example, with a purity of 99%.

[0056] 2. Weigh the raw materials obtained in step 1 according to the stoichiometric ratio, and pour them into a ball mill jar.

[0057] 3. Put the raw materials obtained in step 2 into a planetary ball mill for a ball milling according to the mass ratio of raw materials: zirconium balls: absolute ethanol of 1:1:2, and the ball milling time is 12 hours.

[0058] 4. Pour the product of step 3 into a petri dish, put it into a 60°C oven for drying, and then sieve it ...

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Abstract

The invention relates to a BCZT-based energy storage ceramic material and a preparation method thereof, belonging to the field of functional ceramics. The formula of this material is (Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 ) 1‑x (BiMg 0.6667 Nb 0.3333 o 3 ) x , referred to as (1‑x)BCZT‑xBMN, where x=0‑0.1, x is the number of moles. The preparation process includes calcium carbonate, barium carbonate, zirconium dioxide, bismuth oxide, magnesium oxide, niobium pentoxide and titanium dioxide as raw materials, according to the chemical formula, through weighing, primary ball milling, pre-calcination, secondary ball milling, granulation, pressing The BCZT-based energy storage ceramic material is prepared by processes such as sheeting, debinding, and sintering. This material not only has high energy storage density, but also has the characteristics of high breakdown strength, good temperature and frequency stability, and the like.

Description

technical field [0001] The invention belongs to the technical field of functional ceramics, in particular to a BCZT-based energy storage ceramic material and a preparation method thereof. Background technique [0002] Capacitor is an important energy storage device and one of the electronic components widely used in electronic equipment. Ceramic capacitors are widely used due to their advantages such as wide temperature range, long life and reliable performance. High energy storage density ceramics are the key materials for making small and large capacitors. Due to their advantages such as fast charge and discharge speed and strong anti-cycle aging ability, they are widely used in electric vehicles, high-power electronic devices, pulse power supplies, new energy and smart grid systems. and other fields have very broad prospects. [0003] Energy storage medium ceramic materials mainly include linear ceramics, ferroelectric ceramics and antiferroelectric ceramics. The dielec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/63
CPCC04B35/468C04B35/622C04B35/6303C04B2235/3208C04B2235/3215C04B2235/3232C04B2235/3244C04B2235/3206C04B2235/3251C04B2235/3298C04B2235/602C04B2235/656C04B2235/6567C04B2235/6562Y02T10/70
Inventor 戴中华陈昭兵刘卫国
Owner XIAN TECH UNIV
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