Sodium strontium barium niobate based glass ceramic energy storage material and preparation method and application thereof

A technology of glass ceramics and energy storage materials, which is applied to the parts of fixed capacitors and the dielectric of fixed capacitors, etc., can solve the problems of insufficient energy storage density and low dielectric loss of glass ceramic energy storage materials, and achieve improvement The effects of breakdown field strength, dielectric loss reduction, and excellent dielectric properties

Active Publication Date: 2017-05-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Sodium strontium barium niobate based glass ceramic energy storage material and preparation method and application thereof
  • Sodium strontium barium niobate based glass ceramic energy storage material and preparation method and application thereof
  • Sodium strontium barium niobate based glass ceramic energy storage material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) BaCO with a purity greater than 99wt% 3 , SrCO 3 , Na 2 CO 3 , Nb 2 O 5 , SiO 2 As raw material ingredients, the molar percentages of the above components are 0, 33.6%, 8.4%, 28% and 30%. After ball-milling and mixing for 16 hours, they are dried and melted at a high temperature of 1520 ° C for 3 hours;

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

[0049] (3) The glass flakes obtained in step (2) are kept at 800° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0050] The XRD of the samples prepared in this example is as follows figure 1 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as Figure 5 As shown, the microstructure is as Figure 7-1 The energy storage densities are shown in Table 1.

Embodiment 2

[0052] (1) BaCO with a purity greater than 99wt% 3 , SrCO 3 , Na 2 CO 3 , Nb 2 O 5 , SiO 2 As raw material ingredients, the molar percentages of the above components are 6.72%, 26.88%, 8.4%, 28% and 30%. After ball-milling and mixing for 16 hours, they are dried and melted at a high temperature of 1520 ° C for 2 hours;

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

[0054] (3) The glass flakes obtained in step (2) are kept at 800° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0055] The XRD of the samples prepared in this example is as follows figure 1 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as Figure 5 As shown, the microstructure is as Figure 7-2 The energy storage density is shown in Table 1, and its value is...

Embodiment 3

[0057] (1) BaCO with a purity greater than 99wt% 3 , SrCO 3 , Na 2 CO 3 , Nb 2 O 5 , SiO 2 For raw materials, the molar percentages of the above components are 11.2%, 22.4%, 8.4%, 28% and 30%. After ball-milling and mixing for 16 hours, they are dried and melted at a high temperature of 1520 ° C for 2 hours;

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

[0059] (3) The glass flakes obtained in step (2) are kept at 800° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0060] The XRD of the samples prepared in this example is as follows figure 1 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as Figure 5 As shown, the microstructure is as Figure 7-3 The energy storage density is shown in Table 1, and its value is 12.83J / cm ...

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Abstract

The invention relates to a sodium strontium barium niobate based glass ceramic energy storage material and a preparation method and application thereof. The sodium strontium barium niobate based glass ceramic energy storage material is mainly prepared from BaCO3, SrCO3, Na2CO3, Nb2O5 and SiO2. The preparation method comprises the following steps: blending the five substances according to the molar ratio as follows: BaCO3: SrCO3: Na3CO3: Nb2O5: SiO2= 33.6x: 33.6(1-x): 8.4: 28: 30, wherein the value range of x is 0-0.8; after mixing the ingredients by a ball mill, drying the ingredients, and melting at high temperature to obtain high-temperature melt; pouring the high-temperature melt into a preheated metal die, carrying out stress relief annealing to obtain transparent glass, and cutting the transparent glass into glass slices; and carrying out controlled crystallization on the glass slices to obtain the sodium strontium barium niobate based glass ceramic energy storage material. Compared with the prior art, the sodium strontium barium niobate based glass ceramic energy storage material is simple in system, the preparation method is simple, complicated aftertreatment steps are not required, the material is economic and practical, the prepared glass ceramic energy storage material has excellent dielectric property, and the energy storage characteristic of the material is improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of dielectric energy storage materials, and relates to a barium strontium sodium niobate-based glass ceramic energy storage material and a preparation method and application thereof. Background technique [0002] In recent years, pulse power technology has been widely used in national defense and modern industrial technology fields such as electronic computers, communications, radars, all-electric warships, electromagnetic rail gun weapons, hybrid vehicles, and controlled laser fusion. The energy storage density of existing materials has not yet made a significant breakthrough, and the volume of the energy storage device occupies a large part of the entire pulse device, which also greatly restricts the development of pulse devices to miniaturization and light weight. Therefore, in order to meet the requirements of miniaturization and high energy storage density of pulsed power systems, material workers from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02C03C6/04C03B32/02H01G4/12
Inventor 王海涛翟继卫刘金花沈波
Owner TONGJI UNIV
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