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High energy storage density barium potassium niobate based glass ceramic energy storage material and its preparation and application

A high energy storage density, glass ceramic technology, applied in the field of dielectric energy storage materials, can solve the problems of low energy storage density of energy storage materials, and achieve a simple preparation method, improved energy storage density, and excellent resistance to breakdown field strength. Effect

Inactive Publication Date: 2018-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the preparation method of the above patent is simple, the energy storage density of the energy storage material is still relatively low.

Method used

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  • High energy storage density barium potassium niobate based glass ceramic energy storage material and its preparation and application
  • High energy storage density barium potassium niobate based glass ceramic energy storage material and its preparation and application
  • High energy storage density barium potassium niobate based glass ceramic energy storage material and its preparation and application

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Effect test

Embodiment 1

[0033] A method for preparing a barium potassium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:

[0034] (1) BaCO with a purity greater than 99wt% 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above-mentioned components are 16%, 16%, 32% and 36%. After adding alcohol to moisten and ball mill the mixture for 16 hours, dry it and melt it at 1530°C for 3 hours;

[0035] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 0.9 mm;

[0036] (3) The glass flakes prepared in step (2) were kept at 900° C. for 4 hours for controlled crystallization to prepare barium potassium niobate-based glass-ceramic energy storage materials with high energy storage density.

[0037] The XRD of the sample that present embodiment makes is as figur...

Embodiment 2

[0039] A method for preparing a barium potassium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:

[0040] (1) BaCO with a purity greater than 99wt% 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above components are 22.4%, 9.6%, 32% and 36%. After ball milling and mixing for 16 hours, dry and melt at 1530°C for 3 hours;

[0041] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.2 mm;

[0042] (3) The glass flakes prepared in step (2) were kept at 900° C. for 4 hours for controlled crystallization to obtain glass ceramics.

[0043] The XRD of the sample that present embodiment makes is as figure 1 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as follows Figure 5...

Embodiment 3

[0045] A method for preparing a barium potassium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:

[0046] (1) BaCO with a purity greater than 99wt% 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above components are 25.6%, 6.4%, 32% and 36%, after ball milling for 16 hours, drying, and melting at 1530°C for 3 hours;

[0047] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 650° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.0 mm;

[0048] (3) The glass flakes prepared in the step (2) were kept at 900° C. for 4 hours for controlled crystallization to obtain a glass-ceramic material.

[0049] The XRD of the sample that present embodiment makes is as figure 1 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as follows ...

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Abstract

The invention relates to a high-energy-storage-density barium potassium niobate based glass ceramic energy storage material and preparation as well as application. The glass ceramic energy storage material is prepared from a SiO2 glass component and a ceramic particle component, wherein the ceramic particle component comprises perovskite-phase KNbO3 and tungsten bronze-phase BaNb2O6 and Ba2KNb5O15; in the glass ceramic energy storage material, all chemical ingredients accord with a chemical general formula: 32xBaO.32(1-x)K2O.32Nb2O5.36SiO2, wherein the value range of x is 0.5 to 0.9; the above energy storage material is prepared through the following steps of (1), weighing BaCO3, K2CO3, Nb2O5 and SiO2, uniformly mixing the BaCO3, the K2CO3, the Nb2O5 and the SiO2, and melting an obtained mixture at a high temperature, so as to prepare a high-temperature melt; (2), pouring the high-temperature melt into a preheated metal mold,stress-relief annealing, the high-temperature melt so as to prepare transparent glass, and slicing the transparent glass to obtain a glass slice; (3), carrying out controlled crystallization on the glass slice, so as to prepare a target product. The barium potassium niobate based glass ceramic energy storage material is used for an energy storage capacitor material. Compared with the prior art, the high-energy-storage-density barium potassium niobate based glass ceramic energy storage material and the preparation as well as the application have the advantages that a preparation process is simple, the energy storage density of the glass ceramic energy storage material is high, and the like.

Description

technical field [0001] The invention relates to the field of dielectric energy storage materials, in particular to a barium potassium niobate-based glass ceramic energy storage material with high energy storage density and its preparation and application. Background technique [0002] With the development of industry, the demand for energy continues to increase. Facing the energy crisis, improving energy utilization and developing new energy have become important issues in scientific research. In order to improve energy utilization, various energy storage technologies and energy storage materials have emerged. Among them, high energy storage capacitors are very important and are commonly used circuit components. For energy storage capacitors, it has important characteristics such as high energy storage density, fast charge and discharge speed, high utilization rate, and stable performance. In recent years, pulse power technology has been widely used in national defense and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495
CPCC04B35/495C04B2235/3201C04B2235/3215C04B2235/36
Inventor 王海涛翟继卫刘金花沈波肖石修绍梅
Owner TONGJI UNIV
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