| organic carrier with a level of volatile and good thixotropy affect the printing resistance and sintering of conductive silver paste, screen printing was adopted, and turpentine, 1,4-butyl ester, glycerin and phthalic acid dibutyl were added into terpineol-ethyl cellulose-butyl carbitol system to regulate volatile of organic carrier. And the hydrogenated castor oil and polyamide wax were added in the organic carrier to explore the influence on thixotropy of organic carrier.It was found that when the w(turpentine)= 10%, w(1,4-butyrolactone)=15%, w(terpineol)=35%, w(butyl carbitol)=10%, w(glycerin)=10%, w(phthalic acid dibutyl)=10%, the solvent has good volatile. It can avoids the production of pores on silver film caused by concentrated volatile. In addition, when the mass fraction of polyamide wax is 0.4%, the thixotropic index is 1.9, organic carrier has good thixotropy, which can effectively improve the printing quality of silver conductive paste. |
