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Barium niobate sodium lead based glass ceramic material with high energy-storage density and preparation method thereof

A high energy storage density, glass ceramic technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of low dielectric constant and energy storage density of glass ceramic materials, and achieve high energy storage density The effect of resistance to breakdown field strength and dielectric constant improvement

Active Publication Date: 2019-09-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dielectric constant and energy storage density of the glass-ceramic material prepared by this patent are relatively low

Method used

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  • Barium niobate sodium lead based glass ceramic material with high energy-storage density and preparation method thereof
  • Barium niobate sodium lead based glass ceramic material with high energy-storage density and preparation method thereof
  • Barium niobate sodium lead based glass ceramic material with high energy-storage density and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of barium lead sodium niobate-based glass ceramic energy storage material with high energy storage density comprises the following steps:

[0035] (1) BaCO with a purity greater than 99wt% 3 , PbO, Na 2 CO 3 , Nb 2 O 5 , SiO 2 It is a raw material ingredient, and the molar percentages of its components are 21.25%, 1%, 12.75%, 34%, and 32%. The mixture is ball-milled for 24 hours, dried at 110 °C for 6 hours, and then melted at a high temperature of 1550 °C for 60 minutes; (The above ball mills all use absolute ethanol as the medium, and the ratio of ball to material is 1.5:1).

[0036] (2) pouring the high-temperature melt obtained in step (1) into a square metal mold, annealing at 650° C. for stress relief for 4 hours, and then cutting to obtain a glass flake with a thickness of 1.0-1.5 mm;

[0037] (3) Put an equal amount of the glass flakes obtained in step (2) into a crucible, and after raising the temperature to 800°C at a heating rate ...

Embodiment 2

[0041] The preparation method of barium lead sodium niobate-based glass ceramic energy storage material with high energy storage density comprises the following steps:

[0042] (1) BaCO with a purity greater than 99wt% 3 , PbO, Na 2 CO 3 , Nb 2 O 5 , SiO 2 It is a raw material ingredient, and the molar percentages of its components are 21.25%, 1%, 12.75%, 34% and 32%. After ball milling for 24 hours, drying at 110 °C for 6 hours, and melting at 1600 °C for 50 minutes; (The above ball mills all use absolute ethanol as the medium, and the ratio of ball to material is 1.5:1).

[0043] (2) pouring the high-temperature melt obtained in step (1) into a square metal mold, annealing at 650° C. for stress relief for 5 hours, and then cutting to obtain a glass flake with a thickness of 1.0-1.5 mm;

[0044] (3) Put an equal amount of the glass flakes obtained in step (2) into a crucible, raise the temperature to 850°C at a heating rate of 5°C / min, and keep the glass ceramics for 6 ...

Embodiment 3

[0048] (1) BaCO with a purity greater than 99wt% 3 , PbO, Na 2 CO 3 , Nb 2 O 5 , SiO 2 It is a raw material ingredient, and the molar percentages of its components are 21.25%, 1%, 12.75%, 34%, and 32%. The mixture is ball-milled for 24 hours, dried at 110 °C for 6 hours, and melted at a high temperature of 1580 °C for 55 minutes; (The above ball mills all use absolute ethanol as the medium, and the ratio of ball to material is 1.5:1).

[0049](2) pouring the high-temperature melt obtained in step (1) into a square metal mold, annealing at 650° C. for stress relief for 4.5 hours, and then cutting to obtain a glass flake with a thickness of 1.0-1.5 mm;

[0050] (3) Put an equal amount of the glass flakes obtained in step (2) into a crucible, and after raising the temperature to 900°C at a heating rate of 5°C / min, keep the temperature for 6 hours to obtain glass ceramics.

[0051] The dielectric properties of the samples prepared in this example are as follows: figure 1 As...

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Abstract

The invention relates to a barium niobate sodium lead based glass ceramic material with high energy-storage density and a preparation method thereof. The chemical ingredient of the material conforms to a chemical general formula of 21.25BaCO3-PbO-12.75Na2CO3-34Nb2O5-32SiO2. The raw materials are uniformly mixed and are dried; then, high-temperature melting is performed to obtain glass melt; the high-temperature melt is fast poured into a preheated mold; the residue stress in the glass body is removed through annealing treatment; then, the glass block body is cut into thin glass sheets with the same size and thickness; the thin glass sheets are subjected to controlled crystal separation to obtain the glass ceramic energy storage material. Compared with the prior art, the prepared glass ceramic energy storage material has the advantages of high dielectric constant, high energy storage density, low loss, high power density, good temperature stability and the like.

Description

technical field [0001] The invention belongs to the field of dielectric energy storage materials, in particular to a barium lead sodium niobate-based glass ceramic material with high energy storage density and a preparation method thereof. Background technique [0002] Due to the limited storage capacity of oil and fossil fuels, natural energy sources are under pressure from depletion and environmental pollution. Energy materials such as capacitors and electrochemical cells have attracted great attention in recent years. Electrochemical cells generally have high energy storage density, but relatively low power density due to carrier mobility limitations. Capacitors, on the other hand, have shorter charge and discharge times, higher power density, lower cost, and higher mechanical and thermal stability, making them ideal for pulsed power devices such as high-power microwave sources, ballistic missile applications, defibrillators, and power electronics. [0003] At present, ...

Claims

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Application Information

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IPC IPC(8): C03C10/02C03C6/00C03B19/02C03B32/02H01G4/12
CPCC03B19/02C03B32/02C03C1/00C03C10/00H01G4/129
Inventor 翟继卫江涛沈波
Owner TONGJI UNIV
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