Graphene nano silver-copper paste
A nano-silver and graphene technology, applied in the field of electronic information, can solve the problems of easy and irreversible stacking, poor dispersion, etc., and achieve the effects of strong adaptability, low cost, and avoiding electron migration.
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Embodiment 1
[0037] S1. Add 5mg / ml graphene, 10mg / ml nano-silver, 120mg / ml cetyltrimethylammonium bromide, KH550 coupling agent 30mg / ml into N,N-dimethylformamide, heat to 50°C, ultrasonic treatment for 2 hours to obtain a graphene nano-silver dispersion;
[0038] S2. Add 8 parts of epoxy resin to 33 parts of N,N-dimethylformamide, heat to dissolve, add 5 parts of graphene nano-silver dispersion, 30 parts of copper powder, 0.3 parts of nano-nickel powder and a mixture of nano-calcium carbonate , constant temperature and high-speed stirring, three-roll rolling mill rolling 5 times, and filtering through a 400-mesh sieve.
Embodiment 2
[0040] S1. Add 8mg / ml graphene, 12mg / ml nano-silver, 220mg / ml hexadecyltrimethylammonium bromide, KH550 coupling agent 40mg / ml into N,N-dimethylformamide, heat to 60°C, ultrasonic treatment for 2 hours to obtain a graphene nano-silver dispersion;
[0041] S2. 9 parts of epoxy resins are added in 45 parts of N,N-dimethylformamide, heat to dissolve, add 9 parts of graphene nano-silver dispersion liquid, 36 parts of copper powder, 0.5 part of nano-nickel powder and nano-calcium carbonate The mixture was stirred at constant temperature and high speed, rolled by a three-roll mill for 5 times, and filtered through a 400-mesh sieve.
Embodiment 3
[0043] S1. Add 11mg / ml graphene, 15mg / ml nano-silver, 330mg / ml hexadecyltrimethylammonium bromide, and 51mg / ml silane coupling agent into N,N-dimethylformamide, heat To 68 ° C, ultrasonic treatment for 2 hours, to obtain graphene nano-silver dispersion;
[0044] S2. Add 10 parts of epoxy resin to 51 parts of N,N-dimethylformamide, heat and dissolve, add 10 parts of graphene nano-silver dispersion, 40 parts of copper powder, 1 part of nano-nickel powder and nano-calcium carbonate The mixture was stirred at constant temperature and high speed, rolled by a three-roll mill for 8 times, and filtered through a 400-mesh sieve.
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