High-hardness conductive silver paste containing chromium powders and manufacturing method thereof

Abstract

The invention discloses a high-hardness conductive silver paste containing chromium powders. The conductive silver paste is characterized in that the paste comprises the following raw materials: 35 to 45 parts by weight of silver powders, 5 to 8 parts by weight of iron powders, 4 to 7 parts by weight of chromium powders, 3 to 6 pats by weight of attapulgite, 2 to 3 parts by weight of waste engine oil, 1.2 to 3.4 parts by weight of stannous sulfate, 0.5 to 0.9 parts by weight of sodium carbonate, 1.1 to 2.4 parts by weight of potassium titanate, 2.1 to 3.4 parts by weight of urea, 2.4 to 3.6 parts by weight of monoammonium phosphate, 1.3 to 3.4 parts by weight of polymeric ferric sulfate, 2.1 to 4,2 parts by weight of tetradecyl trimethyl ammonium chloride, 3o to 40 parts by weight of auxiliary agents, and the proper amount of water. Compared with the prior art, the high-hardness conductive silver paste has the following beneficial effects: a conductive silver circuit that is obtained by drying the silver paste has the excellent anti-bending performance; the silk-screen printing performance is good; the surface hardness is high; the corrosion-resistant performance is good; and the environment service life is long. And the process requirement of the notebook computer keyboard production can be completely met.

Description

[0001] technical field [0002] The invention relates to the field of conductive silver paste, in particular to a high-hardness conductive silver paste added with chromium powder and a preparation method thereof. Background technique [0003] Conductive silver paste refers to the silver paste printed on the conductive substrate to make it have the ability to conduct current and eliminate the accumulated static charge. It is generally printed on non-conductive substrates such as plastic, glass, ceramics or cardboard. It is made of conductive Filler, binder, solvent and additive composition. The characteristics that conductive silver paste needs to have are: good conductivity (antistatic property), strong adhesion, good printing adaptability and excellent solvent resistance. However, the existing conductive silver paste on the market has many shortcomings, not only containing lead , cadmium, etc., are toxic, pollute the environment, and when used on conductive substrates, hav...

AI Technical Summary

Problems solved by technology

The characteristics that conductive silver paste needs to have are: good conductivity (antistatic property), strong adhesion, good printing adaptability and excellent solvent resistance. However, the existing conductive silver paste on the market has many shortcomings, not only containing lead , cadmium, etc. and are toxic, pollute the environment, and when used on conductive substrates, the adhesion is low, the soldering resistance is not good, and the sintering performance is poor