Conductive silver paste, preparation method and application thereof

Abstract

The invention discloses conductive silver paste, a preparation method and application thereof. The conductive silver paste is prepared from the following raw materials in parts by weight: 50 -70 partsof conductive silver powder; 2 -3 parts of glycine betaine, 2 -3 parts of dehydroabietic acid, 3 -10 parts of polyurethane, 5 -8 parts of polyester resin, 8 -10 parts of solvent, 2-4 parts of additive, 0.7-1 part of an auxiliary agent, and 0.2 -0.4 part of organic metal salt. According to the conductive silver paste, the preparation method and the application thereof in the invention, the polyurethane is added in the raw materials of the conductive silver paste, the polyurethane is low in heat conductivity coefficient and good in moisture resistance and waterproof performance and also has various excellent performances such as fire resistance, flame retardancy, high temperature resistance and the like, such that the safety performance after the conductive silver paste is prepared into electronic products is improved; through the synergistic effect of glycine betaine and dehydroabietic acid, the compatibility between the materials is better, the compatibility between the conductive silver powder and the resin matrix is improved, the conductive performance of the conductive silver paste is improved, the using amount of the conductive silver powder is reduced, the conductivity of thematerials is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a conductive silver paste and its preparation method and application. Background technique [0002] Silver is one of the transition metals. Its physical and chemical properties are relatively stable, and it also has good thermal and electrical conductivity. Therefore, silver is widely used in modern industry. With the rapid development of the electronic product manufacturing industry, the amount of silver used in industry continues to increase. The main reason is that the use of electronic and electrical fields has increased significantly. Silver powder and silver paste have gradually become one of the main ways of using silver. Conductive silver paste is a special functional material, generally composed of conductive functional phase, matrix resin binder phase, solvent and other auxiliary additives. The conductive functional phase is usually conductive metal powder, and the...

AI Technical Summary

Problems solved by technology

The conductive silver paste in the prior art usually uses nano-silver powder as a conductive filler, which is prepared by mechanically mixing and rolling it with polymer resin, organic solvent and additives in a certain proportion. The compatibility of the product is poor, resulting in a large resistivity of the finished product, which affects its electrical conductivity

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