Conductive silver paste for ceramic filter and preparation method thereof

A ceramic filter, conductive silver paste technology, applied in cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problem that the overall performance is not as good as ethyl cellulose, and the process temperature required for sintering is high. , poor stability of silver paste, etc., to achieve the effect of not easy infiltration, low ash content, and good thermal stability

Pending Publication Date: 2020-08-04
SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the filter is coated with conductive silver paste on the substrate and sintered, a silver conductive layer with high density, high adhesion, high conductivity and good solderability is formed, but the glass powder used is traditional Glass powder requires a high process temperature for sintering, which is likely to cause under-burning. The resin is made of acrylic resin, and its comprehensive performance is not as good as that of ethyl cellulose. Zinc oxide-type stepless additives can improve the oxidation resistance to a certain extent, but The effect is not clear, resulting in poor stability of the entire silver paste

Method used

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  • Conductive silver paste for ceramic filter and preparation method thereof
  • Conductive silver paste for ceramic filter and preparation method thereof
  • Conductive silver paste for ceramic filter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the present embodiment, a conductive silver paste for a ceramic filter, the conductive silver paste comprises the following components and weight percentage content: 55% of metallic silver powder, 3% of glass powder, 29% of organic vehicle, 3% of organic additive and 10% of organic solvent %.

[0032] Among them, the metallic silver powder is spherical silver powder with a particle size of 0.95 μm and a tap density of 2.2 g / ml. The glass powder is lead-free glass powder with a thermal expansion coefficient of 115×10 -7 / °C, the sintering temperature is 650°C, the glass powder includes the following components and weight percentages: Bi 2o 3 79%, ZnO 8%, B 2 o 3 7%, SiO 2 3%, Na 2 O 2%, TiO 2 0.5% and Al 2 o 3 0.5%.

[0033] The organic carrier is made by mixing ethyl cellulose and terpineol. The specific preparation method is: according to the mass ratio of ethyl cellulose and terpineol as 1:4, add ethyl cellulose to terpineol, heat Raise the temperat...

Embodiment 2

[0042] In the present embodiment, a conductive silver paste for a ceramic filter, the conductive silver paste includes the following components and weight percentage content: 80% of metallic silver powder, 2% of glass powder, 16% of organic vehicle, 1% of organic additive and 1% of organic solvent %.

[0043] Wherein, the metallic silver powder is spherical silver powder with a particle size of 1.2 μm and a tap density of 2.5 g / ml. The glass powder is lead-free glass powder with a thermal expansion coefficient of 110×10 -7 / °C, the sintering temperature is 550°C, the glass powder includes the following components and weight percentages: Bi 2 o 3 81%, ZnO 6.5%, B 2 o 3 6.5%, SiO 2 2%, Na 2 O 3%, TiO 2 0.5% and Al 2 o 3 0.5%.

[0044] The organic carrier is made by mixing nitrocellulose and tripropylene glycol monomethyl ether. The specific preparation method is: according to the mass ratio of nitrocellulose and tripropylene glycol monomethyl ether is 1:4, add nit...

Embodiment 3

[0053] In the present embodiment, a conductive silver paste for a ceramic filter, the conductive silver paste includes the following components and weight percentage content: 56% of metallic silver powder, 3% of glass powder, 28% of organic vehicle, 3% of organic additive and 10% of organic solvent %.

[0054] Wherein, the metallic silver powder is spherical silver powder with a particle size of 0.5 μm and a tap density of 2.0 g / ml. The glass powder is lead-free glass powder with a thermal expansion coefficient of 115×10 -7 / °C, the sintering temperature is 700°C, the glass powder includes the following components and weight percentages: Bi 2 o 3 85%, ZnO 5%, B 2 o 3 3%, SiO 2 1%, Na 2 O 1%, TiO 2 3% and Al 2 o 3 2%.

[0055] The organic carrier is made by mixing ethyl hydroxyethyl cellulose and butyl carbitol acetate. The specific preparation method is: the mass ratio of ethyl hydroxyethyl cellulose and butyl carbitol acetate is 1:4 , add ethyl hydroxyethyl ce...

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Abstract

The invention relates to conductive silver paste for a ceramic filter and a preparation method of the conductive silver paste. The conductive silver paste comprises the following components in parts by weight: 50-80 parts of metal silver powder, 2-5 parts of glass powder, 10-30 parts of an organic carrier, 1-3 parts of an organic additive and 1-10 parts of an organic solvent, wherein the glass powder is lead-free glass powder, the coefficient of thermal expansion is 110-120*10<-7>/DEG C, and the sintering temperature is 550-750 DEG C. The preparation method comprises the following steps: adding the organic carrier and the organic solvent into a mixer, adding the metal silver powder, the glass powder and the organic additive, fully mixing, transferring a mixture into a high-speed dispersionmachine, and uniformly dispersing at a high speed to obtain a conductive silver paste; and grinding the prepared conductive silver paste in a three-roller mill, and finely adjusting a roller to enable the fineness of the conductive silver paste to be less than 10mu m and the viscosity to be 30-50Pa.S, thereby obtaining the conductive silver paste for the ceramic filter. The conductive silver paste for the filter can form a conductive silver layer which is high in compactness, high in adhesive force, high in conductivity, good in weldability and stable in performance.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a conductive silver paste for a ceramic filter and a preparation method thereof. Background technique [0002] Ceramic filters are obtained by using piezoceramic electromechanical transducers and mechanical resonators to provide both electrical and mechanical systems within a single system to obtain specific characteristics. It is made of lead zirconate titanate ceramic material. This ceramic material is made into sheet-shaped GTZB, and silver is coated on both sides as electrodes. After DC high-voltage polarization, it has piezoelectric effect and functions as a filter. It is stable and anti-interference. With good performance, it is widely used as frequency selection components in various electronic products such as TV sets, video recorders, and radios. It has the advantages of stable performance, no adjustment, and low price, and replaces the traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00
CPCH01B13/00H01B1/16H01B1/22
Inventor 朱庆明江海涵
Owner SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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