Preparation method of carbon-clad copper electronic paste
A technology of copper electronic paste and carbon coating, which is applied in the direction of cable/conductor manufacturing, circuit, electrical components, etc., can solve the problems of affecting the life of electronic components, reducing the conductivity of conductive paste, limiting the scope of application, etc., reaching the price Low cost, low equipment requirements, and the effect of reducing production costs
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[0037] The preparation method of the carbon-coated copper electronic paste of the present invention is specifically implemented according to the following steps:
[0038] Step 1. First mix formaldehyde and micron copper powder to prepare mixed solvent A, then use a constant temperature magnetic stirrer to heat mixed solvent A, and keep stirring mixed solvent A until the supernatant turns black, then pour it out after standing Clear liquid, leave sediment, dry after washing sediment with deionized water finally, prepare pretreatment copper powder, specifically implement according to the following steps:
[0039] Step 1.1, weigh formaldehyde and micron copper powder respectively according to the mass ratio of 2-5:1-3;
[0040] Step 1.2, mixing the formaldehyde weighed in step 1.1 with micron copper powder to obtain mixed solvent A;
[0041] Step 1.3. Use a constant temperature magnetic stirrer to heat the mixed solvent A obtained in step 1.2 to 60 ° C ~ 80 ° C, and keep stirrin...
Embodiment 1
[0055] Weigh formaldehyde and micron copper powder according to the mass ratio of 2:1, mix the weighed formaldehyde and micron copper powder to obtain mixed solvent A, use a constant temperature magnetic stirrer to heat mixed solvent A to 80 ° C, during the heating process Stir the mixed solvent A continuously in the medium until the supernatant turns black, pour off the supernatant after standing for 10min, and obtain a precipitate; wash the obtained precipitate with deionized water for 3 times and then put it into a vacuum oven. Adjust the drying temperature to 100°C and the drying time to 120 minutes to prepare pretreated copper powder;
[0056] Weigh glucose and pretreated copper powder respectively according to the mass ratio of 1:2, mix the weighed glucose and pretreated copper powder to prepare mixed solvent B, place mixed solvent B in a vacuum furnace, and heat up the vacuum furnace to After holding at 450°C for 60 minutes, carbon-coated copper powder was obtained;
...
Embodiment 2
[0060] Weigh formaldehyde and micron copper powder according to the mass ratio of 3:2, mix the weighed formaldehyde and micron copper powder to obtain mixed solvent A; use a constant temperature magnetic stirrer to heat mixed solvent A to 75 ° C, during the heating process Stir the mixed solvent A in the medium until the supernatant turns black, pour off the supernatant after standing for 15min, and obtain a precipitate; wash the obtained precipitate with deionized water for 3 times and put it in a vacuum oven. Adjust the drying temperature to 90°C and the drying time to 140 minutes to prepare pretreated copper powder;
[0061] Weigh glucose and pretreated copper powder respectively according to the mass ratio of 1.5:4, mix the weighed glucose / copper powder with pretreated to prepare mixed solvent B, place mixed solvent B in a vacuum furnace, and heat up the vacuum furnace After reaching 400°C, keep it warm for 80 minutes to obtain carbon-coated copper powder;
[0062] The vo...
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