Abstract:A kind of conductive lithium complex grease was prepared by using Poly alpha olefin(PAO)as base oil,composite lithium soap as thickener,and adding some anti-oxidation,extreme pressure and conductive additives.The lubrication properties and electrical conductivity of the grease was determined by high speed reciprocating friction and wear tester,and the measurement results were compared with those of foreign commercial grease and domestic conductive grease.By observing the wear scars surface through optical microscope,it is show that the surface of the prepared lithium complex grease is smooth and flat,its lubrication property is better than the other two kinds of greases.The measurement results of volume resistance show that the volume resistivity of lithium complex grease is much smaller than those of the other two kinds of greases.The research shows that the chosen organic conductive medium can reduce the volume resistance,and improve the lubrication performance by forming friction protective film.