Electrical properties of silver paste prepared from nanoparticles and lead-free frit.
Recently, PbO containing glass systems in commercial silver paste have been used due to their low glass transition temperature, good thermal and electrical properties. However, PbO is a hazardous material to both health and the environment. In this study, Pb-free silver paste was prepared by mixing commercial silver powder and silver nanoparticles. The commercial powder has an average particle size of 1.6 microm. The silver nanoparticles with particles size of 20-50 nm were synthesized by a chemical reduction method using surfactant. Pb-free frit was added into the mixed silver powder as the amounts of 3, 6 and 9 wt%. Using the obtained paste, thick films were fabricated by a screen printing on alumina substrate and the films were fired at temperature from 400 to 550 degrees C. The films had thickness of 6-11 microm and sheet resistivity of about 4-11 microomega cm.
Department of Advanced Materials Engineering, BK21 Education Center of Mould Technology for Advanced Materials and Parts, Chosun University, Gwangju 501-759, Korea.
Sung Hyun
SH
Park
Dong Seok
DS
Seo
Jong Kook
JK
Lee
D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D005898:Glass / Q000737:chemistry*; D007854:Lead / Q000737:chemistry; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D009824:Ointments / Q000737:chemistry; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
D046911:Macromolecular Substances; D009824:Ointments; D007854:Lead; D012834:Silver