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Dielectric material of glass-ceramics with high energy storage density and preparation method

A technology with high energy storage density and dielectric material, applied in inorganic insulators and other directions, can solve the problems of high dielectric loss and unfavorable electrical resistance of glass-ceramic, and achieve low dielectric loss, fine grains, and accelerated diffusion speed. Effect

Inactive Publication Date: 2011-06-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the microstructure of ferroelectric glass-ceramic materials is often prone to dendrite structure, and the dielectric loss is relatively high, which is very unfavorable to the electrical resistance of glass-ceramics.

Method used

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  • Dielectric material of glass-ceramics with high energy storage density and preparation method
  • Dielectric material of glass-ceramics with high energy storage density and preparation method
  • Dielectric material of glass-ceramics with high energy storage density and preparation method

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Experimental program
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Effect test

Embodiment 1

[0036] A high energy storage density glass-ceramic dielectric material, the main components of the glass-ceramic dielectric material are BaO, SrO, TiO 2 , SiO 2 And Al 2 O 3 , Its composition doped with AlF 3 And MnO 2 , The molar ratio of main components is BaO:SrO:TiO 2 : SiO 2 : Al 2 O 3 = 0.2936: 0.0734: 0.305: 0.212: 0.086, doped with AlF 3 The number of moles accounts for 4% of the total number of moles of the component (the component is composed of the main component and the doped component), doped with MnO 2 The number of moles accounts for 1% of the total number of moles of the component (the component is composed of the main component and the doped component).

[0037] A method for preparing a high energy storage density glass-ceramic dielectric material is as follows:

[0038] (1) Using BaCO with a purity greater than 99% 3 , SrCO 3 , TiO 2 , SiO 2 , Al 2 O 3 , AlF 3 And MnO 2 As starting material, according to the main components BaO, SrO, TiO 2 , SiO 2 And Al 2 O 3 The m...

Embodiment 2

[0047] A high energy storage density glass-ceramic dielectric material, the main components of the glass-ceramic dielectric material are BaO, SrO, TiO 2 , SiO 2 And Al 2 O 3 , Its composition doped with AlF 3 And MnO 2 , The molar ratio of main components is BaO:SrO:TiO 2 : SiO 2 : Al 2 O 3 = 0.2800: 0.0820: 0.3150: 0.2200: 0.1060, doped with AlF 3 The number of moles accounts for 6% of the total number of moles of components, doped with MnO 2 The number of moles accounts for 0.4% of the total number of moles of components.

[0048] A method for preparing a high energy storage density glass-ceramic dielectric material is as follows:

[0049] (1) Using BaCO with a purity greater than 99% 3 , SrCO 3 , TiO 2 , SiO 2 , Al 2 O 3 , AlF 3 And MnO 2 As starting material, according to the main components BaO, SrO, TiO 2 , SiO 2 And Al 2 O 3 The molar ratio is BaO:SrO:TiO 2 : SiO 2 : Al 2 O 3 = 0.2800: 0.0820: 0.3150: 0.2200: 0.1060, doped with AlF 3 The number of moles accounts for 6% of the ...

Embodiment 3

[0055] A high energy storage density glass-ceramic dielectric material, the main components of the glass-ceramic dielectric material are BaO, SrO, TiO 2 , SiO 2 And Al 2 O 3 , Its composition doped with AlF 3 And MnO 2 , The molar ratio of main components is BaO:SrO:TiO 2 : SiO 2 : Al 2 O 3 =0.3301:0.0522:0.3150:0.2300:0.0800, doped with AlF 3 The number of moles accounts for 7% of the total number of moles of the components, doped with MnO 2 The number of moles accounts for 0.6% of the total number of moles of components.

[0056] A method for preparing a high energy storage density glass-ceramic dielectric material is as follows:

[0057] (1) Using BaCO with a purity greater than 99% 3 , SrCO 3 , TiO 2 , SiO 2 , Al 2 O 3 , AlF 3 And MnO 2 As starting material, according to the main components BaO, SrO, TiO 2 , SiO 2 And Al 2 O 3 The molar ratio is BaO:SrO:TiO 2 : SiO 2 : Al 2 O 3 =0.3301:0.0522:0.3150:0.2300:0.0800, doped with AlF 3 The number of moles accounts for 7% of the total ...

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Abstract

The invention discloses a dielectric material of glass-ceramics with high energy storage density and a preparation method, belonging to the technical field of electronic materials and devices. The dielectric material mainly comprises BaO, SrO, TiO2, SiO2 and Al2O3, which is doped with AlF3 and MnO2; the mol numbers of the AlF3 and the MnO2 respectively account for 2-8% and 0.1-1% of the total molnumber of the ingredients. The preparation method comprises the following steps: calcining and melting the raw materials after ball milling to prepare glass slices; carrying out controlled crystallization on the glass slices and obtaining ferroelectric glass-ceramics dielectric coated silver paste; sintering and solidifying the silver paste to form a metal silver electrode to prepare the dielectric material of glass-ceramics with high energy storage density. The ferroelectric glass-ceramics dielectric material prepared by the invention has compact structure and fine crystal grain and can be used for manufacturing various high-voltage capacitors with high energy storage density.

Description

Technical field [0001] The invention belongs to the technical field of electronic materials and devices, and particularly relates to a high energy storage density glass-ceramic dielectric material and a preparation method thereof. Background technique [0002] High energy storage density capacitors have a wide range of applications in modern industry and national defense, such as pulsed power systems, oil and gas deep well exploration, hybrid vehicles, integrated all-electric propulsion ships, etc., and they play an increasingly important role in power and electronic systems . The development of new technology puts forward higher requirements for its energy storage density and withstand voltage characteristics. The core of improving the energy storage characteristics of capacitors is the development of dielectric materials with high energy storage density. [0003] At present, there are three main types of dielectric materials for high energy storage density capacitors. The first...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00H01B3/02
Inventor 陈继春张勇邓长生戴遐明
Owner TSINGHUA UNIV
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