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A strontium barium potassium niobate based glass ceramic energy storage material and its preparation method and application

A technology of glass ceramics and energy storage materials, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of insufficient dielectric loss and insufficient energy storage density of glass ceramic energy storage materials, etc., to achieve Reduced dielectric loss, improved breakdown field strength, and simple system

Active Publication Date: 2019-06-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, despite extensive research on dielectric energy storage materials, the reported energy storage density of glass-ceramic energy storage materials is not high enough, and the dielectric loss is not low enough.

Method used

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  • A strontium barium potassium niobate based glass ceramic energy storage material and its preparation method and application
  • A strontium barium potassium niobate based glass ceramic energy storage material and its preparation method and application
  • A strontium barium potassium niobate based glass ceramic energy storage material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) SrCO with a purity greater than 99wt% 3 、BaCO 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material ingredients, the molar percentages of the above components are 5.12%, 20.48%, 6.4%, 32% and 36%. After ball milling and mixing for 16 hours, dry and melt at 1500°C for 2 hours;

[0048] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 600° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 0.9 to 1.5 mm;

[0049] (3) The glass flakes prepared in step (2) were kept at 900° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0050] 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 As shown, the microscopic morphology is as Figure 7-1 As shown, the energy storage density is shown in Table 1.

Embodiment 2

[0052] (1) SrCO with a purity greater than 99wt% 3 、BaCO 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material ingredients, the molar percentages of the above components are 10.24%, 15.36%, 6.4%, 32% and 36%. After ball milling and mixing for 16 hours, dry and melt at 1500°C for 2 hours;

[0053] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 600° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 0.9 to 1.5 mm;

[0054] (3) The glass flakes prepared in step (2) were kept at 900° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0055] 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 As shown, the microscopic morphology is as Figure 7-2 As shown, the energy storage density is shown in Table 1, and its value is 17.28J / cm ...

Embodiment 3

[0057] (1) SrCO with a purity greater than 99wt% 3 、BaCO 3 、K 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material ingredients, the molar percentages of the above components are 15.36%, 10.24%, 6.4%, 32% and 36%. After ball milling and mixing for 16 hours, dry and melt at 1500°C for 2 hours;

[0058] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 600° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 0.9 to 1.5 mm;

[0059] (3) The glass flakes prepared in step (2) were kept at 900° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0060] 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 As shown, the microscopic morphology is as Figure 7-3 As shown, the energy storage density is shown in Table 1, and its value is 15.99J / cm ...

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Abstract

The invention relates to a strontium barium potassium niobate-based glass ceramic energy storage material, and a preparation method and application thereof. The preparation method specifically comprises the following steps: proportioning raw materials comprising SrCO3, BaCO3, K2CO3, Nb2O5 and SiO2 according to the molar ratio of 25.6mol%[xSrCO3+(1-x)BaCO3]-6.4mol%K2CO3-32mol%Nb2O5-36mol%SiO2, wherein the value range of x is from 0.2 to 1; ball-milling and mixing the materials, drying and melting at high temperature to obtain a high-temperature melt; and pouring the high-temperature melt into a preheated metal mould, performing stress-relief annealing to prepare transparent glass, and cutting the transparent glass into glass sheets; performing controlled crystallization on the glass sheets to obtain the strontium barium potassium niobate-based glass ceramic energy storage material. The strontium barium potassium niobate-based glass ceramic energy storage material is applied to energy storage capacitor materials. Compared with the prior art, the strontium barium potassium niobate-based glass ceramic energy storage material has the advantages that the glass ceramic energy storage material prepared by adding strontium in a barium potassium niobate system has high energy storage density (17.28 J / cm<3>), a uniform and compact microstructure and low tangent value (0.006) of a dielectric loss angle.

Description

technical field [0001] The invention belongs to the technical field of dielectric energy storage materials, and relates to a strontium barium potassium niobate-based glass ceramic energy storage material and a preparation method and application thereof. 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 mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/02C03C6/04C03B19/02C03B32/02
CPCC03B19/02C03B32/02C03C1/00C03C10/00
Inventor 王海涛翟继卫刘金花沈波
Owner TONGJI UNIV
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