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Strontium barium niobate based glass-ceramic dielectric material and preparation method thereof

A dielectric material, strontium barium niobate-based technology, applied in the field of glass-ceramic dielectric materials and its preparation, can solve the problems of low breakdown strength, low energy storage density and high melting temperature, and achieves high dielectric constant, high The effect of energy storage density and high breakdown strength

Active Publication Date: 2015-05-20
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low breakdown strength of titanate glass-ceramics, the energy storage density is not high, and the energy storage density deteriorates when a high electric field is applied; There are many toxic substances such as lead oxide, which limits its application to a certain extent, and a large amount of NaNbO is precipitated during heat treatment. 3 It is unfavorable to improve the breakdown strength of the material, and the energy storage density is not high
In addition, the melting temperature of the two-system glass is relatively high (above 1500°C), which is not conducive to cost reduction and energy saving and emission reduction

Method used

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  • Strontium barium niobate based glass-ceramic dielectric material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A strontium barium niobate-based glass-ceramic dielectric material and a preparation method thereof, the composition of which is Sr / Ba=0.33.

[0022] 1. With a purity greater than 99% SrCO 3 、BaCO 3 , Nb 2 o 5 、H 3 BO 3 As the starting material, according to SrO:BaO:Nb 2 o 5 :B 2 o 3 =a:b:c:d=0.08:0.24:0.32:0.36 molar ratio ingredients, the total amount of all raw materials is 150 grams. Then these raw materials were ground in a horizontal ball mill by adding ball milling media (agate balls and absolute ethanol) for 8 hours, dried and then kept at 1300°C for 30 minutes to melt into molten glass;

[0023] 2. Quickly pour the high-temperature molten glass obtained in step 1 into a metal mold to form it, then anneal in an annealing furnace at 550°C for 10 hours to eliminate stress, and finally cut into an area of ​​1cm 2 left and right rectangular glass pieces;

[0024] 3. Perform controlled crystallization on the glass flakes prepared in step 2. The crystalliza...

Embodiment 2

[0029] A barium strontium niobate-based glass-ceramic dielectric energy storage material and a preparation method thereof, the composition of which is Sr / Ba=0.54.

[0030] 1. With a purity greater than 99% SrCO 3 、BaCO 3 , Nb 2 o 5 、H 3 BO 3 As the starting material, according to SrO:BaO:Nb 2 o 5 :B 2 o 3 =a:b:c:d=0.112:0.208:0.32:0.36 molar ratio ingredients, the total amount of all raw materials is 150 grams. Then these raw materials were ground in a horizontal ball mill by adding ball milling media (agate balls and absolute ethanol) for 8 hours, dried and then kept at 1300°C for 30 minutes to melt into molten glass;

[0031] 2. Quickly pour the high-temperature molten glass obtained in step 1 into a metal mold to form it, then anneal in an annealing furnace at 550°C for 10 hours to eliminate stress, and finally cut into an area of ​​1cm 2 left and right rectangular glass pieces;

[0032] 3. Perform controlled crystallization on the glass flakes prepared in step 2...

Embodiment 3

[0037] A barium strontium niobate-based glass-ceramic dielectric energy storage material and a preparation method thereof, the composition of which is Sr / Ba=0.82.

[0038] 1. With a purity greater than 99% SrCO 3 、BaCO 3 , Nb 2 o 5 、H 3 BO 3 As the starting material, according to SrO: BaO: Nb 2 o 5 :B 2 o 3 =a:b:c:d=0.112:0.208:0.32:0.36 molar ratio ingredients, the total amount of all raw materials is 150 grams. Then these raw materials were ground in a horizontal ball mill by adding ball milling media (agate balls and absolute ethanol) for 8 hours, dried and then kept at 1300°C for 30 minutes to melt into molten glass;

[0039] 2. Quickly pour the high-temperature molten glass obtained in step 1 into a metal mold to form it, then anneal in an annealing furnace at 550°C for 10 hours to eliminate stress, and finally cut into an area of ​​1cm 2 left and right rectangular glass pieces;

[0040] 3. Perform controlled crystallization on the glass flakes prepared in step...

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Abstract

The invention relates to a strontium barium niobate based glass-ceramic dielectric material and a preparation method thereof. The preparation method comprises the following steps of: with SrCO3, BaCO3, Nb2O5 and H3BO3 as starting raw materials, proportioning according to the mole ratio of aSrO.bBaO.cNb2O5.dB2O3; carrying out ball milling, mixing the raw materials for 8h, and drying; melting at the temperature of 1300 DEG C, and preserving the heat for 30min; then, rapidly cooling and annealing to obtain astomatous uniform glass; carrying out controllable crystallization at a certain temperature to obtain the glass-ceramic dielectric material. The glass-ceramic dielectric material obtained by using the method has the adjustable relative dielectric constant within the range of 21-143, the highest direct current breakdown field strength of 1300kV / cm and the highest energy density of 5.71J / cm<3>.

Description

technical field [0001] The invention relates to a glass-ceramic dielectric material and a preparation method thereof. Specifically, it involves a SrO-BaO-Nb 2 o 5 -B 2 o 3 A system glass-ceramic dielectric material and a preparation method thereof belong to the field of functional ceramic materials. Background technique [0002] With the gradual improvement of energy crisis awareness and environmental protection awareness, people began to try to develop and utilize new energy sources. As an important supporting means of new energy technology, energy storage technology has been highly valued by various countries. Among them, capacitors have attracted much attention because of their advantages such as high specific power, fast charging speed, resistance to cycle aging, suitable for high temperature and high pressure occasions, and no pollution to the environment. At present, capacitors have been used in some important equipment, such as hybrid electric vehicle inverters,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/02
Inventor 陈国华宋俊刘涛涌袁昌来
Owner GUILIN UNIV OF ELECTRONIC TECH
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