Lead barium niobate sodium-based glass ceramic material with high energy 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 problems such as unfavorable capacitor capacitance, material aging, etc., achieve uniform and dense microscopic morphology, increase content, The effect of increasing the dielectric constant

Active Publication Date: 2018-08-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the data is simple, the glass-ceramic material prepared by this patent contains more KNbO 3 and KNb 3 o 8 phase, the material is prone to aging due to moisture absorption; at the same time, its dielectric constant is lower than 70 under the test conditions of 25°C and 100kHz, which is not conducive to the improvement of capacitor capacitance

Method used

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  • Lead barium niobate sodium-based glass ceramic material with high energy density, and preparation method thereof
  • Lead barium niobate sodium-based glass ceramic material with high energy density, and preparation method thereof
  • Lead barium niobate sodium-based glass ceramic material with high energy density, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for preparing a barium-lead-sodium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:

[0033] (1) Na with a purity greater than 99wt% 2 CO 3 、BaCO 3 , PbO, Nb 2 o 5 , SiO 2 For raw material ingredients, the molar percentage of each component is 6.4%, 23.04%, 2.56%, 32%, 36%, mixed by ball mill for 24 hours, dried at 120°C for 6 hours, then melted at 1500°C for 30 minutes; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).

[0034] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 600° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;

[0035] (3) Put an equal amount of the glass flakes prepared in step (2) into a square crucible, heat up to 850°C at a rate of 5°C / min, and keep warm for 5 hours to obtain glass ceramics. ...

Embodiment 2

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

[0040] (1) Na with a purity greater than 99wt% 2 CO 3 、BaCO 3 , PbO, Nb 2 o 5 , SiO 2 For raw material ingredients, the molar percentage of each component is 6.4%, 23.04%, 2.56%, 32%, 36%, mixed by ball mill for 24 hours, dried at 120°C for 6 hours, then melted at 1500°C for 30 minutes; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).

[0041] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 600° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;

[0042] (3) Put an equal number of glass flakes prepared in step (2) into a square crucible, heat up to 900°C at a rate of 5°C / min, and keep warm for 5 hours to obtain glass ceramics.

[0...

Embodiment 3

[0046] A method for preparing a barium-lead-sodium niobate-based glass-ceramic energy storage material with high energy storage density, comprising the following steps:

[0047] (1) Na with a purity greater than 99wt% 2 CO 3 、BaCO 3 , PbO, Nb 2 o 5 , SiO 2 For raw material ingredients, the molar percentage of each component is 6.4%, 23.04%, 2.56%, 32%, 36%, mixed by ball mill for 24 hours, dried at 120°C for 6 hours, then melted at 1500°C for 30 minutes; (The above-mentioned ball mills all use absolute ethanol as the medium, and the ball-to-material ratio is 1.5:1).

[0048] (2) Pouring the high-temperature melt obtained in step (1) into a square copper mold, annealing for stress relief at 600° C. for 6 hours, and then cutting to obtain glass flakes with a thickness of 1.0 to 1.5 mm;

[0049](3) Put an equal amount of the glass flakes prepared in step (2) into a square crucible, heat up to 950°C at a rate of 5°C / min, and keep warm for 5 hours to obtain glass ceramics.

...

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Abstract

The invention relates to a lead barium niobate sodium-based glass ceramic material with high energy density, and a preparation method thereof. The ceramic particles are mainly prepared from the components: perovskite-phase NaNbO3 and tungsten bronze-phase Ba2NaNb5O15. The glass ceramic energy storage material is prepared from the chemical components meeting a chemical general formula of 6.4Na2CO3-23.04BaCO3-2.56PbO-32Nb2O5-36SiO2. The preparation method comprises the steps of adopting Na2CO3, BaCO3, PbO, Nb2O5 and SiO2 as raw materials, rolling and mixing, drying, then melting at high temperature to obtain a glass melt; quickly pouring the high-temperature melt into a preheating mold, preserving heat for multiple hours in a constant-temperature furnace body so as to remove residual stressin quenching glass, and then cutting a glass block into glass slices with equal sizes and thicknesses; carrying out controlled crystallization on the glass slices, and obtaining the glass ceramic energy storage material. The lead barium niobate sodium-based glass ceramic energy-storage material is applied to an energy-storage capacitor material. Compared with the prior art, the ceramic energy-storage material prepared by the invention has the advantages of high dielectric constant and energy density, wide heat treatment temperature range and the like.

Description

technical field [0001] The invention belongs to the field of dielectric energy storage materials, and relates to a dielectric energy storage material and a preparation method thereof, 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] The use of traditional fossil energy will inevitably cause problems such as environmental pollution, and fossil energy is a non-renewable energy that will become increasingly exhausted. The environmental pollution and energy crisis caused by fossil energy have pushed people to explore environmentally friendly and renewable new energy sources. At the same time, in order to improve energy utilization, various energy storage technologies and energy storage materials have emerged as the times require, among which capacitors with high energy storage density are very important energy storage components. Materials currently used as...

Claims

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Application Information

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IPC IPC(8): C03C10/02C03B19/02C03B32/02
CPCC03B19/02C03B32/02C03C10/00
Inventor 翟继卫王书建沈波
Owner TONGJI UNIV
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