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Electrode silver paste for functional ceramics and preparation method of electrode silver paste

A technology of functional ceramics and electrodes, which is applied in the field of electrode silver paste for functional ceramics and its preparation, can solve the problems of affecting the carrier transmission of ceramic interfaces, the inability to guarantee the stability of devices in service, and the loss of wetting performance, etc., to improve the interface bonding strength , Inhibit diffusion erosion, reduce the effect of vitreous content

Active Publication Date: 2020-06-16
SINO PLATINUM METALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the glass transition layer is too thick, it will affect the carrier transport at the ceramic interface, and at the same time lose the wettability with the solder paste, and the solderability will be poor; if the glass transition layer is too thin, it will affect the solder resistance, and the stability of the device cannot be guaranteed. Higher requirements are placed on the performance of silver paste materials

Method used

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  • Electrode silver paste for functional ceramics and preparation method of electrode silver paste
  • Electrode silver paste for functional ceramics and preparation method of electrode silver paste
  • Electrode silver paste for functional ceramics and preparation method of electrode silver paste

Examples

Experimental program
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Effect test

Embodiment 1

[0034] An electrode silver paste for functional ceramics, which consists of the following raw material components in mass percentage: 85wt% silver-based mixture, 0.8wt% lead-free glass powder, 1wt% phase-forming compound, and 13.2wt% organic carrier;

[0035] Add 5wt% ethyl cellulose to 87wt% terpineol and butyl carbitol mixed solvent, its volume ratio V:V=l:3, stir at a constant temperature of 70°C until it dissolves completely, stir and cool to room temperature, add 8wt %lecithin, Span-85 and rosin mass ratio W:W:W=1:1:0.5, dispersed at high speed for 15 minutes, and ultrasonically filtered to obtain a uniformly dispersed organic vehicle.

[0036] Weigh the raw materials according to the following mass percentage: the range of 20wt% flake silver powder has a tap density of 4.0g / cm 3 , DMAX≤5μm, burning loss≤1%, specific surface area 0.7m 2 / g, the range of 60wt% spherical silver powder tap density 4.7g / cm 3 , average particle size 3.0μm, burning loss ≤ 1%, specific surface...

Embodiment 2

[0040] An electrode silver paste for functional ceramics, comprising the following components in mass percentage:

[0041] 76wt% silver mixture, 1.8wt% lead-free glass powder, 0.2wt% phase-forming compound, 22wt% organic vehicle.

[0042] 6wt% ethyl cellulose and phenolic resin mass ratio W:W=5:1 are added in 90wt% terpineol and butyl carbitol mixed solvent, its volume ratio V:V=3:l, constant temperature 70 ℃ Stir until it is completely dissolved, stir and cool to room temperature, add 4wt% lecithin, castor oil and organic wax at a mass ratio of W:W:W=1:1:0.5, disperse at high speed for 15 minutes, and ultrasonically filter to obtain a uniformly dispersed organic vehicle .

[0043] Weigh raw materials according to the following mass percentage: 70wt% spherical silver powder, tap density 4.5g / cm 3 , average particle size 2.8μm, specific surface area 1.0m 2 / g, 6wt% silver carbonate, 1.8wt% lead-free glass softening point 610°C, average particle size 2 O, 22 wt% organic vehic...

Embodiment 3

[0047] An electrode silver paste for functional ceramics, which consists of the following raw material components in mass percentage: 65wt% silver-based mixture, 1.2wt% lead-free glass powder, 0.5wt% phase-forming compound, and 33.3wt% organic carrier;

[0048] Add 8wt% ethyl cellulose to 89wt% butyl carbitol and DBE mixed solvent, its volume ratio V:V=2:l, stir at a constant temperature of 70°C until it dissolves completely, stir and cool to room temperature, add 3wt% lecithin , castor oil and sodium hexametaphosphate mass ratio W:W:W=2:1:1, disperse 15min under the high rotating speed, and obtain the evenly dispersed organic carrier by ultrasonic filtration, take raw material by the following mass percentage:

[0049] The range of 14wt% flake silver powder Tap density 1.4g / cm 3 , DMAX≤10μm, burning loss≤1%, specific surface area 1.5m 2 / g; 44wt% range of spherical silver powder tap density 3.7g / cm 3 , average particle size 1.7μm, burning loss ≤ 1%, specific surface area 1....

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Abstract

The invention discloses electrode silver paste for functional ceramics and a preparation method of the electrode silver paste. The electrode silver paste is prepared from the following components in percentage by mass: 55 to 85 weight percent of a silver mixture, 0.8 to 1.8 weight percent of lead-free glass powder, 0.1 to 1 weight percent of a phase-forming compound and 13 to 44 weight percent ofan organic carrier. The preparation method is characterized by comprising the steps of premixing part of an organic carrier with lead-free glass powder sheets and the phase-making compound to form slurry, grinding and dispersing the slurry by a grinder, adding all silver mixture, grinding until the fineness of the slurry is less than 5 microns, mixing the residual organic carrier, and carrying outdouble-planet stirring defoaming to obtain the electrode silver paste for the functional ceramics. By solving the problems of sintering compactness of the metallized layer and regulation and controlof a glass phase interface structure, high carrier mobility, strong adhesive force, thermal expansion matching property, assembly reliability, environmental stability and cost economy of the functional ceramic metallized layer are finally realized, and the production process requirements of printing, dipping, spraying and hole dropping can be met.

Description

technical field [0001] The invention relates to the technical field of information electronic materials, in particular to an electrode silver paste for functional ceramics and a preparation method thereof. Background technique [0002] With the rapid development of information microelectronics towards miniaturization and three-dimensional integration, especially in my country's information construction, the need for new electronic components with high frequency, small size, high energy and large capacity is becoming more and more urgent. With the advent of the 5G era, 5G base stations are densely deployed. The filter used in 5G base stations is the core radio frequency device of the base station. It has the characteristics of small size, large Q value, low insertion loss, good stability, and high power withstand. The filter fully covers the silver paste electrode layer on the surface of the functional ceramic and welds it with the circuit board. After DC high-voltage polariz...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00
CPCH01B1/22H01B13/00
Inventor 李俊鹏左川黄少文李世鸿王珂原野李燕华
Owner SINO PLATINUM METALS CO LTD
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