Dielectric ceramic high in energy density in low electric fields and preparing method thereof

A technology of high energy density and dielectric ceramics, applied in the direction of fixed capacitor dielectric, fixed capacitor parts, circuits, etc., to achieve the effect of simple composition and process steps, high permittivity, and good repeatability

Active Publication Date: 2017-03-15
陕西德拜介智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in highly integrated, miniaturized portable or wearable devices, there are relatively large application limitations

Method used

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  • Dielectric ceramic high in energy density in low electric fields and preparing method thereof
  • Dielectric ceramic high in energy density in low electric fields and preparing method thereof

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preparation example Construction

[0029] A method for preparing a dielectric ceramic with low electric field and high energy density, comprising the following steps:

[0030] (1) According to chemical formula (1-x) BaTiO 3 -xBaSnO 3 The proportion of each element in the weighing raw material BaCO 3 、TiO 2 and SnO 2 , where 0.03≤x≤0.15;

[0031] (2) Mix the weighed raw materials and put them into a ball mill jar, add the ball milling solvent anhydrous ethanol and agate balls, mill for 4 hours, the ball milling speed is 40-50 rpm, and then put the mixture in an oven at 80°C Dry for 3 hours, then put it into a mortar and grind, and then pass through a 60-mesh sieve to obtain powder;

[0032] (3) Put the powder obtained in step (2) into the crucible, compact it, and cover it; pre-fire it in a muffle furnace at 1350°C, keep it warm for 4 hours, cool it down to room temperature naturally, and take it out of the furnace to obtain the pre-fired powder ;

[0033] (4) Grind the calcined powder obtained in step (3...

Embodiment 1

[0043] (1) According to chemical formula (1-x) BaTiO 3-xBaSnO 3 The proportion of each element in the weighing raw material BaCO 3 、TiO 2 and SnO 2 , where x=0.03;

[0044] (2) Mix the weighed raw materials and put them into a ball mill jar, add ball milling solvent anhydrous ethanol and agate balls, mill for 4 hours, and the ball milling speed is 40 rpm, then put the mixture into an oven for drying at 80°C 3 hours, then put into a mortar and grind, then pass through a 60-mesh sieve to obtain powder;

[0045] (3) Put the powder obtained in step (2) into the crucible, compact it, and cover it; pre-fire it in a muffle furnace at 1350°C, keep it warm for 4 hours, cool it down to room temperature naturally, and take it out of the furnace to obtain the pre-fired powder ;

[0046] (4) Grind the calcined powder obtained in step (3) into a fine powder in a mortar, put it into a ball mill jar, add ball milling medium absolute ethanol, and carry out secondary ball milling at a spe...

Embodiment 2

[0053] (1) According to chemical formula (1-x) BaTiO 3 -xBaSnO 3 The proportion of each element in the weighing raw material BaCO 3 、TiO 2 and SnO 2 , where x=0.09;

[0054] (2) Mix the weighed raw materials and put them into a ball mill jar, add ball milling solvent anhydrous ethanol and agate balls, mill for 4 hours, and the ball milling speed is 45 rpm, then put the mixture into an oven for drying at 80°C 3 hours, then put into a mortar and grind, then pass through a 60-mesh sieve to obtain powder;

[0055] (3) Put the powder obtained in step (2) into the crucible, compact it, and cover it; pre-fire it in a muffle furnace at 1350°C, keep it warm for 4 hours, cool it down to room temperature naturally, and take it out of the furnace to obtain the pre-fired powder ;

[0056] (4) Grind the calcined powder obtained in step (3) into a fine powder in a mortar, put it into a ball mill jar, add ball milling medium absolute ethanol, and carry out secondary ball milling at a sp...

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Abstract

Dielectric ceramic high in energy density in low electric fields and a preparing method thereof are disclosed. The chemical formula of the dielectric ceramic is (1-x)BaTi<3>-xBaSnO3, wherein the x is a mole ratio, and 0.03<=x<=0.15. The dielectric ceramic having high energy storage performance in low electric fields is prepared by the preparing method adopting solid synthesis. According to the dielectric ceramic and the method, components and process steps are simple, operation is easy and repeatability is good. The dielectric ceramic is mainly used for the fields of portable and wearable electronic devices having a high integrated level and a small size.

Description

technical field [0001] The invention belongs to the field of electronic ceramic materials, and in particular relates to a dielectric ceramic with low electric field and high energy density and a preparation method thereof. Background technique [0002] In the environment of increasing shortage of fossil energy and global warming, energy storage is a key technology for rational utilization of energy. In modern industry and social life, electric energy is the main energy medium, and its storage is an important way to effectively use energy. In electrical energy storage methods, commonly used energy storage devices include rechargeable batteries, supercapacitors, fuel cells, etc. These devices have high energy density, but the charging and discharging time is slow. In contrast, energy storage capacitors have the characteristics of fast charging and discharging, so they have great application prospects in hybrid electric vehicles, pulse power equipment, etc. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/626C04B41/88H01G4/12
CPCH01G4/1218C04B35/4682C04B35/626C04B41/5116C04B41/88C04B2235/3293
Inventor 刘泳斌王妍高景晖钟力生于钦学
Owner 陕西德拜介智科技有限公司
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