Lead-free relaxation antiferroelectric ceramic energy storage material, and preparation method thereof

An energy storage material and antiferroelectric technology, applied in the field of energy storage ceramic materials, can solve the problems of immature mass production technology, limited application range, small dielectric constant, etc., and improve energy storage density and energy storage efficiency. , Improve energy storage efficiency and energy storage density, the effect of high density

Active Publication Date: 2019-01-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The second category is organic film-based materials, such as polypropylene film, polyester film, polyvinylidene fluoride film, etc., which have very high breakdown field strength, but the dielectric constant is very small, and the scope of use is severely limited.
The third category is the composite dielectric of ceramics and polymers or glass. This type of material has a breakdown field strength far exceeding that of general applications. It is mainly aimed at pulse power systems, and its mass production technology is not yet mature.
The fourth category is antiferroelectric materials, and the research mainly focuses on lead zirconate titanate (Pb(Zr,Ti)O 3 ) system and silver niobate (AgNbO 3 ) system energy storage research, under the action of an external electric field, this kind of material will undergo a rapid transition from antiferroelectric phase to ferroelectric phase, and the dielectric constant shows a strong nonlinear effect, resulting in its polarization strength far exceeding the same strength Linear or near-linear media under the action of an electric field, so their energy storage density far exceeds the first three types of dielectric materials, and become a research hotspot at this stage. Despite the above advantages, such materials generally have large energy dissipation for energy storage

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  • Lead-free relaxation antiferroelectric ceramic energy storage material, and preparation method thereof
  • Lead-free relaxation antiferroelectric ceramic energy storage material, and preparation method thereof
  • Lead-free relaxation antiferroelectric ceramic energy storage material, and preparation method thereof

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Embodiment 1

[0027] The preparation method of the lead-free relaxation antiferroelectric ceramic energy storage material of the present invention comprises the following steps:

[0028] 1) According to La with a purity of 99.99% 2 o 3 Dosing, and ball milling with absolute ethanol as the medium for 12 hours, so that the particle size of the rare earth element is reduced, and then drying at 200 ° C to obtain La 2 o 3 powder;

[0029] 2) Bi with a purity of 99.99% 2 o 3 , 99.99% Na 2 CO 3 and 99.99% TiO 2 As raw materials, weigh 116.52 grams, 26.63 grams and 80.06 grams respectively, and then put them into a ball mill jar for ball milling and mixing. During the ball milling process, the volume of raw materials: the volume of agate balls: the volume of ball milling meson absolute ethanol is equal to 1:2:4, The ball milling time was 12 hours, and then the ball-milled raw materials were put into an oven and baked at 80° C. for 10 hours. After drying, use a tablet machine to press the r...

Embodiment 2

[0035] The preparation method of the lead-free relaxation antiferroelectric ceramic energy storage material of the present invention comprises the following steps:

[0036] 1) According to Sm with a purity of 99.99% 2 o 3 Perform batching, and then use absolute ethanol as the medium for ball milling for 12 hours to reduce the particle size of rare earth elements, and then dry at 200°C to obtain Sm 2 o 3 powder;

[0037] 2) Bi with a purity of 99.99% 2 o 3 , 99.99% Na 2 CO 3 and 99.99% TiO 2 As raw materials, weigh 116.52 grams, 26.63 grams and 80.06 grams respectively, and then put them into a ball mill jar for ball milling and mixing. During the ball milling process, the volume of raw materials: the volume of agate balls: the volume of ball milling meson absolute ethanol is equal to 1:2:4, The ball milling time was 12 hours, and then the ball-milled raw materials were put into an oven and baked at 80° C. for 10 hours. After drying, use a tablet machine to press the r...

Embodiment 3

[0042] The preparation method of the lead-free relaxation antiferroelectric ceramic energy storage material of the present invention comprises the following steps:

[0043] 1) According to Dy with a purity of 99.99% 2 o 3 Perform batching, and then use absolute ethanol as the medium for ball milling for 12 hours to reduce the particle size of the rare earth elements, and then dry at 200°C to obtain Dy 2 o 3 powder;

[0044] 2) Bi with a purity of 99.99% 2 o 3 , 99.99% Na 2 CO 3 and 99.99% TiO 2 As raw materials, weigh 116.52 grams, 26.63 grams and 80.06 grams respectively, and then put them into a ball mill jar for ball milling and mixing. During the ball milling process, the volume of raw materials: the volume of agate balls: the volume of ball milling meson absolute ethanol is equal to 1:2:4, The ball milling time was 12 hours, and then the ball milled raw materials were put into an oven and baked at 80° C. for 10 hours. After drying, use a tablet machine to press t...

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Abstract

The invention discloses a lead-free relaxation antiferroelectric ceramic energy storage material, and a preparation method thereof. The chemical formula is (1-x-y)(Na<0.5>Bi<0.5>)TiO<3-x>(Sr<0.7>Bi<0.2>)TiO<3-y>Me<2>O<3>, wherein Me is used for representing one or two elements selected from La, Sm, and Dy, x and y are used for representing molar fractions, 0.2<=x<=0.7, and 0.01<=y<=0.2. The lead-free relaxation antiferroelectric ceramic energy storage material is relatively in energy storage density, energy storage efficiency, and possesses relaxation characteristics, and the preparation method is simple.

Description

technical field [0001] The invention belongs to the technical field of energy storage ceramic materials, and relates to a lead-free relaxation antiferroelectric ceramic energy storage material and a preparation method thereof. Background technique [0002] High energy storage density and high reliability dielectric energy storage materials are playing an increasingly important role in various electric and electronic systems, especially in the field of high-energy pulse power technology, which has irreplaceable applications. Related devices and products are developing in the direction of miniaturization, light weight and multi-function, which put forward higher requirements for the energy storage density of the device, and the key to improving the energy storage characteristics of the device is to develop a product with high energy storage density, efficiency and heat dissipation. Dielectric material with good stability. [0003] At present, the existing dielectric energy st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
CPCC04B35/475C04B35/622C04B2235/3201C04B2235/3213C04B2235/3224C04B2235/3227
Inventor 李景雷李飞杨帅刘金凤徐卓张树君
Owner XI AN JIAOTONG UNIV
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