Conductive ink and preparation method thereof

Abstract

The invention discloses conductive ink and a preparation method thereof. The conductive ink consists of the following components in percentage by mass: 1 to 2 percent of carbon powder, 3 to 5 percent of organic carrier A, 50 to 65 percent of sheet silver, 0.5 to 1 percent of nickel powder, 30 to 45 percent of organic carrier B, and 0.1 to 0.2 percent of dispersant, wherein the organic carrier A is formed by completely dissolving diethyl adipate or 2-butoxyethyl acetate with mass percentage of between 65 and 75 percent with polyester resins or acrylic resins with mass percentage of between 25 and 35 percent; and the organic carrier B is formed by completely dissolving 1,4-butyrolactone or terpineol with mass percentage of between 62 and 77 percent with a chloride-vinyl acetate resin with mass percentage of between 22 and 38 percent, and then adding a coupling agent with mass percentage of between 0.05 and 1 percent into the mixture. Compared with the prior carbon-silver paste, the carbon powder of the conductive ink is combined with paste better, carbon-silver paste is more compact, and the conductance is better when the compactness is better.

Description

Technical field:

[0001] The invention belongs to the technical field of electronic materials, and specifically refers to a carbon-silver conductive ink with excellent conductivity suitable for use on flexible circuits and a preparation method thereof. Background technique:

[0002] The conductive ink used on flexible circuits is made of ultrafine silver powder and low-temperature curing thermoplastic resin. It can be used above PET and PC. It is suitable for screen printing and has good printability, conductivity and oxidation resistance. , Hardness, expansion performance and strong adhesion, it is a functional material for the manufacture of electronic terminal products. It can be used for membrane switches, flexible printed circuits, and has been widely used in computer keyboards, notebook keyboards and home appliances such as microwave ovens and washing machines. Its performance is far superior to traditional circuit equipment, and it has the characteristics of environmental ...