Method for reducing dielectric loss of titanium barium stannate system in reducing atmosphere

A technology of barium titanium stannate and dielectric loss, which is applied in the field of ceramic compositions, can solve the problems of low resistivity, increased production cost, and high sintering temperature, and achieve the effect of reducing dielectric loss and improving performance

Inactive Publication Date: 2018-10-02
TIANJIN UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The manufacturing process of MLCC (multilayer chip ceramic capacitor) requires that the internal electrode must be co-sintered with the dielectric material to form a monolithic structure, while common MLCC ceramic materials such as BaTiO 3 The sintering temperature of the system ceramic material is relatively high. For the usual air atmosphere sintering, only those metals with high melting point, difficult to oxidize and low resistivity can be used as internal electrode materials. Generally, precious metals Pt, Pd or Pd-Ag alloy are used as materials. MLCC internal electrodes, so the cost of internal electrode materials accounts for a large proportion of the production cost of MLCC, and once caused the cost of MLCC to remain high due to the high cost of electrode materials, which greatly limited its application range
In addition, the large specific volume of MLCC requires reducing the thickness of the dielectric layer and increasing the number of ceramic dielectric layers, but as the number of dielectric layers increases, the number of internal electrode layers also increases accordingly, resulting in an increase in the production 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
  • Method for reducing dielectric loss of titanium barium stannate system in reducing atmosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) The raw material BaTiO 3 , SnO 2 、BaCO 3 Press Ba(Sn 0.05 Ti 0.95 )O 3 Chemical formula weighing ingredients;

[0022] (2) Put the powder prepared above into a ball mill jar, add zirconia balls and deionized water, and ball mill for 4 hours. The mass ratio of powder to zirconia balls and deionized water is 1:1:2; The ball-milled raw materials are dried in an infrared drying oven at 100°C, and passed through a 40-mesh sieve after drying to obtain a powder with uniform particles;

[0023] (3) calcining the powder treated in step (2) at 1050° C. for 3 hours to synthesize the main crystal phase;

[0024] (4) Put the powder of the main crystal phase synthesized in step (3) into a ball mill tank, perform secondary ball milling, add zirconia balls and deionized water, and ball mill for 4 hours. The quality of the powder, zirconia balls, and deionized water The ratio is 1:1:2; the ball-milled raw materials are then dried in an infrared drying oven, and passed through...

Embodiment 2～8

[0029] The main process parameters and dielectric loss of Examples 2-8 are detailed in Table 1, and the rest of the preparation process is exactly the same as that of Example 1.

[0030] Table 1

[0031]

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

No PUM Login to view more

Abstract

The invention discloses a method for reducing dielectric loss of a titanium barium stannate system in a reducing atmosphere. The method comprises the following steps: firstly, weighing and blending materials of BaTiO3, SnO2 and BaCO3 according to a formula Ba(SnxTi1-x)O3, in the formula, x is greater than 0 and less than or equal to 0.3; carrying out ball milling, drying and screening, calcining at 1050 DEG C, and synthesizing a main crystal phase; further carrying out secondary ball milling, and pelletizing with an adhesive; further pressing a pelletizing powder material into a blank, degumming the blank, and sintering at 1350-1450 DEG C in a reducing atmosphere, thereby obtaining a low-loss titanium barium stannate medium material in the reducing atmosphere. Due to addition of a secondary ball milling process, the dielectric loss of the titanium barium stannate system is reduced to 0.5-4.0% from 1.0-5.0% of the prior art, so that the properties of a multi-layer flaky ceramic capacitor are greatly improved.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a method for reducing the dielectric loss of barium titanium stannate. Background technique [0002] The manufacturing process of MLCC (multilayer chip ceramic capacitor) requires that the internal electrode must be co-sintered with the dielectric material to form a monolithic structure, while common MLCC ceramic materials such as BaTiO 3 The sintering temperature of the system ceramic material is relatively high. For the usual air atmosphere sintering, only those metals with high melting point, difficult to oxidize and low resistivity can be used as internal electrode materials. Generally, precious metals Pt, Pd or Pd-Ag alloy are used as materials. MLCC internal electrodes, so the cost of internal electrode materials accounts for a large proportion of the production cost of MLCC, and once caused the cost of MLCC to remain high due to the high cost of electrod...

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): C04B35/468C04B35/622C04B35/626
CPCC04B35/468C04B35/622C04B35/6261C04B2235/3215C04B2235/3293C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567C04B2235/6582
Inventor 李玲霞王瑞杰张宁于仕辉孙正
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap