Method for preparing nickel-plated copper powder
A technology of nickel-plated copper and copper powder, applied in liquid chemical plating, coating, metal material coating process and other directions, can solve problems such as high cost, complex process, environmental pollution, etc., to ensure uniformity, simple process, The effect of process safety
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Embodiment 1
[0021] a. Put the copper powder with a particle size of 200 mesh into a hydrochloric acid solution with a weight concentration of 15% to activate for 80 minutes, then wash with tap water 3 times until neutral, filter, and set aside;
[0022] b. Put the copper powder activated in step a into a hydrochloric acid solution with a weight concentration of 5% for pickling for 15 minutes, then wash with water until neutral, filter, and set aside;
[0023] c. first get 10 parts by weight of nickel sulfate solution and add it to 50 parts by weight of sodium hypophosphite solution under stirring, then add 20 parts by weight of sodium citrate solution, adjust pH=8 with sodium hydroxide solution, and then add the Put the alkaline nickel plating solution in a water bath and heat it to 35°C, then put the copper powder pickled in step b into the nickel plating solution, stir until the copper powder is evenly dispersed, wait for 60 minutes to react, and then wash it with deionized water 3 time...
Embodiment 2
[0026] a. Put the copper powder with a particle size of 800 mesh into a hydrochloric acid solution with a weight concentration of 75% to activate for 20 minutes, then wash with tap water 5 times until neutral, filter, and set aside;
[0027] b. Put the copper powder activated in step a into a hydrochloric acid solution with a weight concentration of 15% for pickling for 5 minutes, wash with water until neutral, filter, and set aside;
[0028] c. first get 35 parts by weight of nickel sulfate solution and add it to 10 parts by weight of sodium hypophosphite solution under stirring, then add 80 parts by weight of sodium citrate solution, adjust pH=10 with sodium hydroxide solution, and then add the Put the alkaline nickel plating solution in a water bath and heat it to 50°C, then put the copper powder pickled in step b into the nickel plating solution, stir until the copper powder is evenly dispersed, wait for 15 minutes to react, and then wash it with deionized water 5 times, c...
Embodiment 3
[0031] a. Put the copper powder with a particle size of 500 mesh into a hydrochloric acid solution with a weight concentration of 40% to activate for 50 minutes, then wash with tap water 4 times until neutral, filter, and set aside;
[0032] b. Put the copper powder activated in step a into a hydrochloric acid solution with a weight concentration of 7% for pickling for 10 minutes, wash with water until neutral, filter, and set aside;
[0033] c. first get 20 parts by weight of nickel sulfate solution and add it to 30 parts by weight of sodium hypophosphite solution under stirring, then add 50 parts by weight of sodium citrate solution, adjust pH=9 with potassium hydroxide solution, and then add the Put the alkaline nickel plating solution in a water bath and heat it to 40°C, then put the copper powder pickled in step b into the nickel plating solution, stir until the copper powder is evenly dispersed, wait for 30 minutes to react, and then wash it with deionized water 4 times,...
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