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Preparation method of barium strontium titanate based glass ceramic energy storage material

A technology of glass ceramics and barium strontium titanate, which is applied in glass production, components of fixed capacitors, and dielectrics of fixed capacitors, etc., and can solve problems such as increased connection loss

Inactive Publication Date: 2012-11-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oda et al studied the BST-Al 2 o 3 -SiO 2 Based on the dielectric properties of glass ceramics, it is pointed out that aluminum ions as acceptor impurities will lead to an increase in electrical loss

Method used

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  • Preparation method of barium strontium titanate based glass ceramic energy storage material
  • Preparation method of barium strontium titanate based glass ceramic energy storage material
  • Preparation method of barium strontium titanate based glass ceramic energy storage material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Prepare a barium strontium titanate-based glass-ceramic material as follows:

[0031] 1) BaCO with a purity greater than 99wt% 3 , SrCO 3 、TiO 2 , SiO 2 、Al 2 o 3 As raw material ingredients, the molar percentage of each component is 14.8%, 22.2%, 29%, 12%, 22%, after mixing by ball mill for 20h, drying, and melting at 1550℃ for 3.5h;

[0032] 2) Pouring the high-temperature melt obtained in step 1 into a metal mold, annealing for stress relief at 700°C for 4 hours, and then cutting to obtain glass flakes with a thickness of 0.5mm;

[0033] 3) The glass flakes prepared in step 2 were kept in a conventional furnace at a temperature of 950° C. for 2 hours for controlled crystallization to obtain glass ceramics.

[0034] The SEM collection of illustrative plates of the ceramic sample that the present embodiment makes is as figure 1 As shown, the XRD pattern is as figure 2 As shown, the dielectric properties and withstand voltage properties are as image 3 , 4 sh...

Embodiment 2

[0036] Prepare a barium strontium titanate-based glass-ceramic material as follows:

[0037] 1) BaCO with a purity greater than 99wt% 3 , SrCO 3 、TiO 2 , SiO 2 、Al 2 o 3 As raw material ingredients, the molar percentage of each component is 14.8%, 22.2%, 29%, 12%, 22%, after mixing by ball mill for 20h, drying, and melting at 1550℃ for 3.5h;

[0038] 2) Pouring the high-temperature melt obtained in step 1 into a metal mold, annealing for stress relief at 700°C for 4 hours, and then cutting to obtain glass flakes with a thickness of 0.5mm;

[0039] 3) The glass flakes prepared in step 2 were kept in a microwave oven at a temperature of 950° C. for 10 minutes for controlled crystallization to obtain glass ceramics.

[0040] The SEM collection of illustrative plates of the ceramic sample that the present embodiment makes is as figure 1 As shown, the XRD pattern is as figure 2 As shown, the dielectric properties and withstand voltage properties are as image 3 , 4 shown...

Embodiment 3

[0042] Prepare a barium strontium titanate-based glass-ceramic material as follows:

[0043] 1) BaCO with a purity greater than 99wt% 3 , SrCO 3 、TiO 2 , SiO 2 、Al 2 o 3 As raw material ingredients, the molar percentage of each component is 14.8%, 22.2%, 29%, 12%, 22%, after mixing by ball mill for 20h, drying, and melting at 1550℃ for 3.5h;

[0044] 2) Pouring the high-temperature melt obtained in step 1 into a metal mold, annealing for stress relief at 700°C for 4 hours, and then cutting to obtain glass flakes with a thickness of 0.5mm;

[0045] 3) Keep the glass flakes prepared in step 2 in a conventional furnace at 950°C for 2 hours for controlled crystallization to obtain glass ceramics;

[0046] 4) Heat the glass-ceramics obtained in step 3 in a microwave oven at a speed of 30°C / min to 950°C for 2 minutes, and perform microwave heat treatment to obtain a glass-ceramic dielectric with high energy storage density.

[0047] The SEM collection of illustrative plates o...

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Abstract

The invention belongs to the field of dielectric energy storage material, and specifically relates to a preparation method of barium strontium titanate based glass ceramic material with high energy storage density. The invention provides the preparation method of barium strontium titanate based glass ceramic energy storage material, which comprises the following steps: burdening according to (BaxSr1-x) TiO3-aAl2O3-bSiO2, wherein x=0.4-0.6, (a+b) / (2+a+b)=0.3-0.35 and a / b=0.5-1.0, drying after ball-milling and mixing materials, and melting at high temperature; casting high-temperature melt into a metal mold, performing stress relief annealing, and then cutting to obtain glass thin sheet with thickness of 0.5-1.0mm; performing controlled devitrification to the glass thin sheet to obtain glass ceramic; performing microwave heat treatment to the glass ceramic in a microwave oven to obtain the glass ceramic dielectric with high energy storage density. The method provided by the invention is simple and the energy storage property of the prepared glass ceramic material is improved greatly.

Description

technical field [0001] The invention belongs to the field of dielectric energy storage materials, and in particular relates to a method for preparing strontium barium titanate-based glass ceramic materials with high energy storage density by microwave heat treatment. Background technique [0002] High energy storage density, high withstand voltage ceramic capacitors are one of the common electronic components in electronic equipment, and are widely used in laser, radar, mobile communication, aerospace and other fields. In order to meet the requirements of miniaturization and high energy storage density of pulsed power systems, material workers from various countries are actively exploring and researching dielectric materials with high dielectric constant, low connection loss and high compressive strength, strontium barium titanate-based glass ceramics Materials have attracted extensive attention in this field in recent years due to their excellent dielectric properties. Gla...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03B32/02H01G4/12
CPCY02P40/57
Inventor 沈波汪金文翟继卫
Owner TONGJI UNIV
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