Low-silver-content composite conductive silver paste and preparation method thereof
A technology of composite conductivity and silver content, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. The effect of production cost, improved electrical conductivity, and improved packing density
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[0027] (1) Preparation of organic carrier
[0028] Add 80 grams of 1,4-dimethylnaphthalene into a three-necked round-bottom flask, heat to 60℃ in a water bath, measure 20 grams of polyvinyl acetate particles and slowly add to the above solution, keep stirring, after the resin is added, water bath The temperature was raised to 80°C for 8 hours to obtain a light yellow transparent viscous resin solution.
[0029] (2) Preparation of base silver paste
[0030] Take 30g of the organic carrier solution prepared in (1), add it to a 200ml beaker, keep stirring slowly, successively measure 2g of turpentine and 0.3g of methyl silicone oil into the carrier solution, stir at high speed until the mixture is uniform, then weigh 10 Gram silver-plated copper powder (silver-plated weight ratio is 10%), slowly add, keep stirring, after adding, stir at high speed until silver-plated copper powder is evenly dispersed in the carrier, and then measure 60 grams of silver-plated glass powder (silver-plated...
Example Embodiment
[0032] Example 1
[0033] Take 20 g of the base silver paste prepared in (2), add 1 g of 1,4-dimethylnaphthalene, mix at high speed in a high speed disperser until the slurry is uniform, and after cooling to room temperature, the viscosity is measured to be about 50,000 centimeters Moor. The silver paste was printed on the PET film by screen printing (220 mesh screen) and dried in a constant temperature oven at 120° C. for 10 minutes to obtain a conductive film with a thickness of about 25 μm, and then the conductivity of the conductive film was measured. Various performance data of silver paste and conductive film are summarized in Table 1.
Example Embodiment
[0034] Example 2
[0035] Take 20 grams of the base silver paste prepared in (2), add 2 grams of 1,4-dimethylnaphthalene, mix at high speed in a high-speed disperser until the slurry is uniform, and after cooling to room temperature, the viscosity is measured to be about 40,000 centimeters Moor. The silver paste was printed on the PET film by screen printing (220 mesh screen) and dried in a constant temperature oven at 120° C. for 10 minutes to obtain a conductive film with a thickness of about 25 μm, and then the conductivity of the conductive film was measured. Various performance data of silver paste and conductive film are summarized in Table 1.
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