Oyster shell/fluorapatite composite conductive silver paste and preparation method thereof

Abstract

The invention discloses oyster shell / fluorapatite composite conductive silver paste and a preparation method of the oyster shell / fluorapatite composite conductive silver paste. The oyster shell / fluorapatite composite conductive silver paste is characterized by comprising, by weight, 40-50 parts of silver powder, 2-4 parts of kaolin, 1-3 parts of oyster shells, 3-5 parts of fluorapatite, 1.2-2.4 parts of NNO, 0.8-1.4 parts of hydrogenated castor oil, 0.7-1.6 parts of aluminium potassium sulfate, 1.2-2.7 parts of germanium dioxide, 4-7 parts of linoleic acid and 30-40 parts of additives. The oyster shells, the fluorapatite and the like are modified and then are added to a raw material, the cost is lowered, the requirement of devices for the electric performance can be met on the condition of low silver content, the adhesive force between the conductive silver paste and a printed material is high, temperature resistance and humidity resistance are good, the fine line printing performance is excellent, and the production cost of the paste is lowered remarkably.

Description

technical field [0001] The invention relates to the field of conductive silver paste, in particular to an oyster shell / fluoroapatite composite conductive silver paste and a preparation method thereof. Background technique [0002] 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, have low adhesi...

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