Low-silver copper-base conductive ink and preparation method thereof

Abstract

The invention discloses a low-silver copper-base conductive ink and a preparation method thereof. The conductive ink is prepared from the following components in parts by weight: nano copper wires, silver nitrate, indium powder, titanium dioxide powder, bismuth tungstate powder, 500-mesh tourmaline powder acidified carbon fibers, an epoxy resin, sodium hypophosphite, trimethylamine borane, polyoxypropylene glycerol ether, diphenyl phosphite, ethylene bis stearamide, sodium methylene bis-naphthalene sulfonate, polydimethylsiloxane, dipropylene glycol, isopropanol and acetone. The conductive ink has low silver content, thereby greatly lowering the manufacturing and use cost; the conductive ink has the advantages of favorable conductivity and favorable adhesive force, and thus, can be widely used in solar electromagnetic devices, thin film switches, flexible printed circuits and other electronic devices; and therefore, the conductive ink has huge use and application values.

Description

technical field [0001] The invention belongs to the technical field of polymer conductive materials, and in particular relates to a low-silver copper-based conductive ink and a preparation method thereof. Background technique [0002] Conductive ink, a paste ink made of conductive material dispersed in a binder, commonly known as paste ink. Conductive inks are usually composed of conductive fillers, binders, solvents and additives. According to different conductive fillers, conductive ink can be divided into gold-based conductive ink, silver-based conductive ink and copper-based conductive ink. [0003] Among them, silver-based conductive inks are widely used in the fields of printed circuit boards, OLEDs, touch screens, radio frequency identification, electrode sensors, electromagnetic shielding, and organic solar cells due to their good conductivity and stable performance. However, with the increasing market demand for conductive inks and the high price of precious metal...

AI Technical Summary

Problems solved by technology

However, with the increasing market demand for conductive inks and the high price of precious metal silver, the silver content in silver conductive inks is usually higher than 50%, and in the field of electronic product applications, the silver content in conductive inks used Up to more than 80%, which increases the manufacturing cost of silver conductive ink and greatly restricts the application of silver conductive ink

[0004] Copper-based conductive ink is cost-effective, and its conductivity is equivalent to that of silver-based conductive ink. It has a good potential to replace silver-based conductive ink, but metal copper is easily oxidized and the ink is not conductive. If the problem of easy oxidation of metal copper is overcome, Prepare a copper-based conductive ink with low silver, oxidation resistance, good conductivity, heat resistance and good stability, which will produce good economic value

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