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

X8R type BCZT-based BME-MLCC dielectric material suitable for high voltage resistance and high reliability and preparation method thereof

A technology of dielectric materials and quality, applied in the field of materials, can solve problems such as disadvantages, reduce the cost of MLCC, cannot meet the dielectric of ultra-thin layer ceramic capacitors, etc., and achieve the effect of increasing resistivity and reducing production costs.

Active Publication Date: 2022-02-18
TSINGHUA UNIV
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Visible, existing method has adopted barium calcium titanate more than 200nm as matrix, can't satisfy the preparation of ultra-thin layer multilayer ceramic capacitor dielectric; Introduce poisonous element such as vanadium pentoxide in dopant, is unfavorable for environmental protection and human. Non-toxic and harmless; the MLCC dielectric material prepared by air sintering with barium titanate matrix cannot meet the preparation of base metal inner electrode MLCC, which is not conducive to reducing the cost of MLCC

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
  • X8R type BCZT-based BME-MLCC dielectric material suitable for high voltage resistance and high reliability and preparation method thereof
  • X8R type BCZT-based BME-MLCC dielectric material suitable for high voltage resistance and high reliability and preparation method thereof
  • X8R type BCZT-based BME-MLCC dielectric material suitable for high voltage resistance and high reliability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (Ba prepared in this embodiment 1-x Ca x )(Ti 1-y-z Ca y Zr z )O 3 The molecular formula of the base metal internal electrode multilayer ceramic capacitor dielectric material is as follows:

[0055] 100mol% (Ba 0.95 Ca 0.05 )(Ti 0.96 Ca 0.02 Zr 0.02 )O 3 -2mol%MgO-1mol%MnO 2 -1mol% BaCO 3 -1mol% SiO 2 -1mol%Y 2 o 3 -1mol%Yb 2 o 3 Formula Ⅰ-1

[0056] figure 1 and figure 2 Adopted for this embodiment (Ba 1-x Ca x )(Ti 1-y-z Ca y Zr z )O 3 From the X-ray diffraction images and SEM images of the matrix powder, it can be seen that the BCZT matrix powder has no impurity phase, the grain size distribution is uniform, and the average grain size is about 160nm.

[0057] Prepare as follows:

[0058] According to the stoichiometric ratio of the above chemical formula, using 160nm (Ba 0.95 Ca 0.05 )(Ti 0.96 Ca 0.02 Zr 0.02 )O 3 As the base powder, isopropanol (about 10 times the mass of the powder) was used as the dispersion medium, ball milled f...

Embodiment 2

[0073] (Ba prepared in this embodiment 1-x Ca x )(Ti 1-y-z Ca y Zr z )O 3 The molecular formula of the base metal internal electrode multilayer ceramic capacitor dielectric material is as follows:

[0074] 100mol% (Ba 0.95 Ca 0.05 )(Ti 0.97 Ca 0.02 Zr 0.01 )O 3 -2mol%MgO-1mol%MnO 2 -1mol% BaCO 3 -1mol% SiO 2 -xmol%Ho 2 o 3 -xmol%Dy 2 o 3 Formula Ⅰ-2

[0075] Prepare as follows:

[0076] According to the stoichiometric ratio of the above chemical formula, using 120nm (Ba 0.95 Ca 0.05 )(Ti 0.97 Ca 0.02 Zr 0.01 )O 3 The powder is used as the matrix powder, using deionized water as the dispersion medium, adding a certain amount of dispersing aid, ball milling for 6 hours, and then transferred to a measuring cup for stirring.

[0077] The soluble metal salt Mg(NO 3 ) 2 ·6H 2 O, Mn(CH 3 COOH) 2 4H 2 O, (CH 3 COOH) 2 Ba,Dy(NO 3 ) 3 ·6H 2 O and Ho(NO 3 ) 3 ·6H 2 O is dissolved in a certain amount of deionized water to form a metal salt solution...

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
particle diameteraaaaaaaaaa
sizeaaaaaaaaaa
Curie pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses an X8R type BCZT-based BME-MLCC dielectric material suitable for high voltage resistance and high reliability and a preparation method thereof. The molecular formula of the BCZT-based dielectric material is shown as a formula I, in the formula I, in (Ba1-xCax) (Ti1-y-zCayZrz) O3, x represents the mole fraction of Ca in the A site, x is larger than or equal to 0.01 and smaller than or equal to 0.05, y represents the mole fraction of Ca in the B site, y is larger than or equal to 0.01 and smaller than or equal to 0.05, z represents the mole fraction of Zr, and z is larger than or equal to 0.01 and smaller than or equal to 0.05. Compared with BaTiO3 which is widely used, the Curie temperature of the BCZT can reach 125-135 DEG C, the room temperature dielectric constant of the dielectric material can reach 1800-2800 through chemical coating modification, the higher use temperature requirement is met, and then the MLCC anti-reduction dielectric material meeting the X8R characteristic is prepared. The research on the BCZT-based X8R type ultrathin layer BME-MLCC dielectric material with high voltage resistance and high reliability has important practical application significance. (Ba1-xCax) (Ti (1-y-z) CayZrz) O3-MgO-MnO2-BaCO3-SiO2-R2O3 is shown as a formula I in the specification.

Description

technical field [0001] The invention relates to an X8R type BCZT-based BME-MLCC dielectric material suitable for high pressure resistance and high reliability and a preparation method thereof, belonging to the field of materials. Background technique [0002] As one of the most commonly used electronic components, capacitors store and release electrical energy in the form of static electricity, and are widely used in various high and low frequency power circuits. Multilayer ceramic capacitors (MLCC) occupy more than 90% of the capacitor market due to their small size, high voltage resistance, high temperature resistance and wide capacity range. In recent years, with the continuous advancement of technology in consumer electronics, 5G base stations, electric vehicles and other civilian fields, as well as military fields such as aerospace, aviation, and ships, the requirements for MLCCs are also constantly increasing. Especially affected by global energy and climate change, t...

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): C04B35/49H01G4/12H01G4/30C04B35/622C04B35/64C04B35/628
CPCC04B35/49H01G4/1245H01G4/30C04B35/622C04B35/64C04B35/62815C04B35/62805C04B35/6281C04B2235/3206C04B2235/3267C04B2235/442C04B2235/3418C04B2235/3224C04B2235/3225C04B2235/483C04B2235/6562C04B2235/6567C04B2235/661C04B2235/6586C04B2235/96C04B2235/443C04B2235/449C04B2235/785
Inventor 王晓慧甄一超赵培尧程旭肖梦简朱超琼
Owner TSINGHUA 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