Infrared spectra of four kinds of compounds of the mineral based nano-lubricant(NiFe2O4/3GS),the blank samples,the original lubricant 3GS and polyol-ester oil 160SZ have been studied.Somebands of their spectra chalked up by using Fourier transform infrared(FT-IR) spectrometer were assigned.Some absorption peaks were found in the FT-IR spectra of nano-lubricant(NiFe2O4/3GS)similar with that of aliphatic acid,aliphatic ether and aliphatic carbinol existing in polyol-ester oil1 60SZ.It is possible that factors...