Abstract
In order to reduce the amount of platinum particles in conductive paste for oxygen sensor of automobile, uniform Pt spherical powder and platinum coated alumina powder were prepared and used for the preparation of conductive paste. The specific resistance of conductive paste prepared from uniform Pt spherical powder was lower than that of the paste mixed with non uniform conventional commercial Pt powder. When pure alumina content increased from 10 to 15%, the specific resistance of conductive paste prepared from platinum coated alumina powder was shown lower value compared with mixed paste of conventional non-uniform Pt and alumina powder.
