Lubricating oil for use under radioactive or energy irradiation conditions

摘要

A finely pulverized alkaline earth metal oxide or an alkali metal oxide is added to perfluoropolyether oil represented by the general formula Rf[CF(CF3)CF2O]5 DIFFERENCE 60Rf, to absorb HF generated by decomposition of the perfluoropolyether at radioactive or energy irradiation of the perfluoropolyether oil, thereby effectively suppressing diffusion of HF into the oil or the gas phase.