High energy storage density strontium potassium niobate based glass ceramic energy storage material and preparation and application thereof

A technology of high energy storage density and energy storage materials, which is applied in the field of dielectric energy storage materials, can solve the problems of low breakdown electric field, uneven microstructure, low energy storage density, etc., so as to improve the breakdown field strength, Improve the effect of micro junction and theoretical energy storage density

Inactive Publication Date: 2016-07-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of inhomogeneous microstructure, low breakdown electric field resistance and low energy storage density of potassium strontium niobate-based glass ceramic energy storage materials prepared by traditional heat treatment methods

Method used

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  • High energy storage density strontium potassium niobate based glass ceramic energy storage material and preparation and application thereof
  • High energy storage density strontium potassium niobate based glass ceramic energy storage material and preparation and application thereof
  • High energy storage density strontium potassium niobate based glass ceramic energy storage material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Potassium strontium niobate-based glass-ceramic energy storage material formulation 70wt% [25% K 2 O-25%SrO-50%Nb 2 o 5 ]-30wt% (80% SiO 2 -10%Al 2 o 3 -10%B 2 o 3 ), prepared by the following method:

[0039] (1) K with a purity greater than 99wt% 2 CO 3 , SrCO 3 and Nb with a purity of 99.99 wt% 2 o 5 , SiO 2 、Al 2 o 3 、H 3 BO 3 For raw material ingredients, the molar percentage of each component is 17.5%, 17.5%, 35%, 24%, 3%, and 3% is mixed by ball mill for 24 hours, dried at 120°C for 6 hours, and melted at 1500°C 2h; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).

[0040] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 500° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;

[0041] (3) Put the glass flake prepared in step (2) in a microwave oven at a heating rate of 20° C....

Embodiment 2

[0052] Potassium strontium niobate-based glass ceramic energy storage material with 55wt% [25% K 2 O-25%SrO-50%Nb 2 o 5 ] - 45wt% (80% SiO 2 -10%Al 2 o 3 -10%B 2 o 3 ), prepared by the following method:

[0053] (1) K with a purity greater than 99wt% 2 CO 3 , SrCO 3 and Nb with a purity of 99.99 wt% 2 o 5 , SiO 2 、Al 2 o 3 、H 3 BO 3 For raw material ingredients, the molar percentage of each component is 13.75%, 13.75%, 27.5%, 36%, 4.5%, 4.5%, mixed by ball mill for 24 hours, dried at 120°C for 6 hours, and melted at 1500°C 2h; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).

[0054] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 500° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;

[0055] (3) Put the glass flake prepared in step (2) in a microwave oven at a heating rate of 20° C. / mi...

Embodiment 3

[0066] Potassium strontium niobate-based glass ceramic energy storage material with 50wt% [25% K 2 O-25%SrO-50%Nb 2 o 5 ]-50wt% (80% SiO 2 -10%Al 2 o 3 -10%B 2 o 3 ), prepared by the following method:

[0067] (1) K with a purity greater than 99wt% 2 CO 3 , SrCO 3 and Nb with a purity of 99.99 wt% 2 o 5 , SiO 2 、Al 2 o 3 、H 3 BO 3 For raw material ingredients, the molar percentage of each component is 12.5%, 12.5%, 25%, 40%, 5%, 5%, mixed by ball mill for 24 hours, dried at 120°C for 6 hours, then melted at 1500°C 2h; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).

[0068] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 500° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;

[0069] (3) Put the glass flake prepared in step (2) in a microwave oven at a heating rate of 20° C. / min to 900°...

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Abstract

The invention relates to a high energy storage density potassium strontium niobate-based glass ceramic energy storage material and its preparation and application. After batching according to the formula, the potassium strontium niobate-based glass ceramic adopts high-temperature melting-quick cooling technology to prepare transparent niobate glass ; Then, a niobate-based glass-ceramic energy storage material with high energy storage density is prepared by microwave crystallization. Compared with the existing conventional crystallization technology, this crystallization technology has the advantages of shorter crystallization time, more uniform microstructure, higher breakdown resistance electric field, and higher energy storage density, and can be used as a high energy storage Capacitors, pulse technology materials.

Description

technical field [0001] The invention relates to a dielectric energy storage material, in particular to a potassium strontium niobate-based glass ceramic energy storage material with high energy storage density and its preparation and application. Background technique [0002] With the consumption of energy fossil materials and the sharp deterioration of the environment, human beings have gradually increased their awareness of energy crisis and environmental protection, and new renewable energy has attracted more and more attention. In recent years, under the great attention of the energy, transportation, electric power, communication and other departments of various countries, the development of new energy such as: electric energy, wind energy, solar energy, nuclear energy... has achieved certain results. However, energy storage materials have become a technical bottleneck restricting the development of new energy in various countries. The development of high-efficiency ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02
CPCC03C10/00
Inventor 翟继卫肖石修绍梅沈波
Owner TONGJI UNIV
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