Bi-based glass pastes were prepared in the mixed organic solvents (α-terpineol and texanol)
with different kinds and concentrations of organic dispersant such as fish oil , phosphate ester and
poly methyl methacrylate (PMMA). The rheological stability of glass pastes was characterized by
using a rheometer and adsorption behavior of organic additives for the glass powders was carried out
by using a thermal gravimetric analyzer (TGA).The Bi-based glass pastes exhibited the most stable
rheological behavior at an addition of phosphate ester of 0.5 in mass %, due to the steric repulsive
force acting on the surface of glass powers with adsorbing the organic additives. This study allowed
significant delay of the sedimentation time and suppressed generation of micropores during practical
forming process by a screen printing method.
