High-dielectric strength leadless energy storage dielectric ceramic material and preparation method thereof

A technology of energy storage media and ceramic materials, which is applied in the field of dielectric ceramic materials with high dielectric strength and high energy storage efficiency and its preparation, can solve problems such as limited applications, and achieve energy cost savings, high dielectric strength, and stable performance Effect

Active Publication Date: 2019-04-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, the low dielectric constant limits its application as an energy storage component to a certain extent.

Method used

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  • High-dielectric strength leadless energy storage dielectric ceramic material and preparation method thereof
  • High-dielectric strength leadless energy storage dielectric ceramic material and preparation method thereof
  • High-dielectric strength leadless energy storage dielectric ceramic material and preparation method thereof

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preparation example Construction

[0032] Its preparation method comprises the following steps:

[0033] Step 1: SrCO 3 , BaCO 3 , rare earth oxides of Nb or Ta, oxides of titanium or zirconium, trivalent rare earth oxides, according to (Sr 0.7 Ba 0.3 ) a R 6-a x 2+a Y 8-a o 30 , where X is Nb 5+ or Ta 5+ , Y is Ti 4+ or Zr 4+ , R is a trivalent rare earth, and the molar ratio of a=4 or 5 is used for preparing materials, and the resulting mixture is milled with zirconia balls, and absolute ethanol is used as a solvent, according to the weight ratio of mixture: grinding balls: ethanol Grinding for 1:(5-7):(2-4) for 5-8 hours, finally obtaining a homogeneous mixture;

[0034] Step 2: Dry the ball-milled mixture at 120°C and pass through a 60-mesh sieve to obtain a dry powder, then pre-fire and keep it warm at 1050-1250°C for 3-5 hours to obtain a sample briquette;

[0035] Step 3: Pulverize the sample burnt block, use zirconia balls as the ball milling medium, and use absolute ethanol as the solvent,...

Embodiment 1

[0042] Step 1: according to the embodiment 1 batching of table 1, SrCO 3 、BaCO 3 , La 2 o 3 , Nb 2 o 5 and TiO 2 , 19.75%, 11.31%, 15.56%, 38.11% and 15.26% mass ratios are prepared respectively, the mixture obtained is a ball milling medium with zirconia balls, and absolute ethanol is a solvent, according to the mixture: grinding balls: The weight ratio of ethanol was 1:5:2 to grind for 6 hours, and finally a homogeneous mixture was obtained;

[0043] Step 2: The mixture after ball milling was dried at 120°C and passed through a 60-mesh sieve to obtain a dry powder, and then pre-fired at 1050°C for 3 hours to obtain a sample briquette;

[0044] Step 3: Pulverize the sample burnt block, use zirconia balls as the ball milling medium, use absolute ethanol as the solvent, grind for 2 hours according to the weight ratio of mixture: balls: ethanol is 1:5:2, dry and make Granulation treatment, the granulation size is controlled at 120 mesh, and the granules are put into the f...

Embodiment 2

[0047] Step 1: according to the embodiment 2 batching of table 1, SrCO 3 、BaCO 3 , La 2 o 3 , Nb 2 o 5 and TiO 2 According to the mass ratio of 24.08%, 13.79%, 7.59%, 43.36% and 11.16% respectively, the mass ratio of the stock is prepared, and the obtained mixture is used as the ball milling medium with zirconia balls, and with absolute ethanol as the solvent, according to the mixing method Material: Grinding ball: The weight ratio of ethanol is 1:6:3 and grinds for 7 hours, finally obtains the mixture that mixes evenly;

[0048] Step 2: The mixture after ball milling was dried at 120°C and passed through a 60-mesh sieve to obtain a dry powder, and then pre-fired at 1100°C for 4 hours to obtain a sample briquette;

[0049] Step 3: Pulverize the sample burnt block, use zirconia balls as the ball milling medium, use absolute ethanol as the solvent, grind for 3 hours according to the weight ratio of mixture: balls: ethanol is 1:6:3, dry and make Granulation treatment, the ...

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Abstract

A high-dielectric strength leadless energy storage dielectric ceramic material and a preparation method thereof belong to the technical fields of electronic information functional materials and devices. The high-dielectric strength leadless energy storage dielectric ceramic material is characterized in that the composition formula of the material is (Sr0.7Ba0.3)aR6-aX2+aY8-aO30, wherein X is Nb<5+> or Ta<5+>, Y is Ti<4+> or Zr<4+>, R is a trivalent rare earth element, and the value of a is 4 or 5. The material achieves a high dielectric strength, realizes a high energy storage efficiency, saves the energy cost, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of electronic information functional materials and devices, and in particular relates to a dielectric ceramic material with high electric strength and high energy storage efficiency and a preparation method thereof. Background technique [0002] In the late 1970s, with the research and increasingly wide application of technologies such as nuclear physics, electron beams, accelerators, lasers, discharge theory, and plasma, pulse power technology began to be widely used in national defense, scientific experiments, industry, agriculture, and medicine. , and pulse capacitors play an extremely important role as energy storage components in pulse power equipment. Among many energy storage components, such as flywheels, acid batteries, and electrochemical supercapacitors, their applications are often limited due to their low energy storage efficiency or high cost. Dielectric materials are regarded as promising ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/626
CPCC04B35/495C04B35/622C04B35/62605C04B2235/3213C04B2235/3215C04B2235/3227C04B2235/3232C04B2235/6567
Inventor 袁颖曹磊唐斌钟朝位张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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