Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Compound for preparing ceramic material and preparation method thereof and ceramic capacitor

A technology of ceramic capacitors and ceramic materials, applied in the direction of capacitors, laminated capacitors, fixed capacitors, etc., can solve the problems of limitations, low breakdown field strength, and high remanent polarization strength, and achieve enhanced relaxivity and increased The effect of ordering and high energy storage density

Active Publication Date: 2020-04-21
XIAN TECH UNIV
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the mainstream environment-friendly lead-free ferroelectric material systems currently researched, sodium bismuth titanate-based materials have relatively high Curie temperature and low depolarization temperature, which ensures that energy storage materials and devices have good temperature Stability, and the saturation polarization is high, but the remnant polarization is also high, and the breakdown field strength is not high, which limits the application of this material system in energy storage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Compound for preparing ceramic material and preparation method thereof and ceramic capacitor
  • Compound for preparing ceramic material and preparation method thereof and ceramic capacitor
  • Compound for preparing ceramic material and preparation method thereof and ceramic capacitor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] A kind of preparation method for preparing the compound of ceramic material of the present invention, comprises the following steps:

[0040] The dried powdered Na 2 CO 3 , SrCO 3 , MgO, Nb 2 o 5 、 Bi 2 o 3 and TiO 2 Weighing, mixing, ball milling, pre-calcination and drying according to the stoichiometric ratio in the general formula.

[0041] In order to ensure that the powdered Na 2 CO 3 , SrCO 3 , MgO, Nb 2 o 5 、 Bi 2 o 3 and TiO 2 In dry state, there will be no weighing error and affect the performance of ceramic materials. Before weighing, dry the raw materials at 180-300 ° C for 8 hours.

[0042] The balls used in ball milling are yttrium-stabilized zirconia balls, wherein the mass ratio of the composite, yttrium-stabilized zirconia balls and solvent can be 1:1:2. Preferably, the solvent is one of ethanol and methyl ethyl ketone, Preferred is ethanol. The use of ethanol as the solvent has low cost and little harm to the human body.

[0043] In a...

Embodiment 1

[0065] A kind of preparation method of ceramic capacitor, concrete steps are as follows:

[0066] A) will analyze pure anhydrous Na 2 CO 3 , SrCO 3 , MgO, Nb 2 o 5 、 Bi 2 o 3 and TiO 2 After drying at 180-300°C for 8 hours, according to the general formula of the compound: 0.69Bi 0.5 Na 0.5 TiO 3 -0.3Sr 0.7 Bi 0.2 TiO 3 -0.01Bi(Mg 2 / 3 Nb 1 / 3 )O 3 The stoichiometric ratio in the above-mentioned each raw material is weighed and mixed to obtain a mixture;

[0067] B) The mixture obtained in step A is subjected to planetary ball milling in absolute ethanol using yttrium-stabilized zirconia balls as a medium for 24 hours. The mass ratio of the mixture, yttrium-stabilized zirconia balls, and ethanol is 1:1:2, and then the mixed abrasive is taken out, 80 ℃ heat preservation and drying for 24 hours;

[0068] C) The mixture obtained in step B is pre-fired in air at 900°C for 3 hours, ground, sieved by ball milling for the second time, mixed powder, yttrium-stabilized z...

Embodiment 2

[0075] The general formula of the complex is: 0.68Bi 0.5 Na 0.5 TiO 3 -0.3Sr 0.7 Bi 0.2 TiO 3 -0.02Bi(Mg 2 / 3 Nb 1 / 3 )O 3

[0076] The preparation method is the same as in Example 1, except that the calcining temperature is 850°C and the sintering temperature is 1200°C.

[0077] performance as figure 2 As shown, the energy storage density is 2.5J / cm 3 , the energy storage efficiency is 81%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
energy densityaaaaaaaaaa
energy densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a compound for preparing a ceramic material, a preparation method of the compound and a ceramic capacitor, belonging to the technical field of dielectric energy storage ceramicmaterials. The general chemical formula of the material is (1-x-y)Bi<0.5>Na<0.5>TiO<3>-ySr<0.7>Bi<0.2>TiO<3>-xBi (Mg<2 / 3>Nb<1 / 3>)O<3>, wherein x is larger than or equal to 0.0 and smaller than or equal to 0.1, and y is larger than or equal to 0.1 and smaller than or equal to 0.45. The ceramic capacitor and a multi-layer ceramic capacitor are respectively prepared by a traditional solid-phase reaction method and a tape casting method through material drying, burdening, ball milling, drying, presintering, secondary ball milling, secondary drying, granulation, molding, sintering, polishing and gold electrode coating. The preparation method is simple in preparation process, low in cost, free of pollution and high in adaptability. The ceramic material is high in energy storage density and energy storage efficiency, and the processed MLCC multilayer capacitor has extremely high charge-discharge density and short charge-discharge time.

Description

technical field [0001] The invention relates to the technical field of dielectric energy storage ceramic materials, in particular to a bismuth sodium titanate-based lead-free ceramic material with high energy storage density and high energy storage efficiency and a preparation method thereof, and the material is processed into a high charge and discharge density and high energy storage efficiency. ceramic capacitors for energy storage efficiency. Background technique [0002] With the development of electronics, information and control technology towards miniaturization and high integration, as well as the development of safety, environmental protection and renewable power energy equipment, such as electric vehicles, large energy regulators in power grids, medical and other mobile energy equipment And use, the development of high-density energy storage materials has increasingly become a research hotspot. At present, energy storage materials are mainly concentrated in super...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/626C04B35/64H01G4/12H01G4/30
CPCC04B35/462C04B35/62675C04B35/64H01G4/1209H01G4/30C04B2235/3201C04B2235/3298C04B2235/3234C04B2235/3213C04B2235/3255C04B2235/3206C04B2235/6562C04B2235/6567
Inventor 纪红芬刘卫国马晗柯番戴中华庞利霞王欣吴春芳
Owner XIAN TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com