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This work is an extension of the study of the use of alumina nanopowder as an additive to oils [1]. Oleic acid, which acts as a strong surfactant, is used to eliminate the coagulation of particles of alumina nanopowder. A suspension with a particle size of 20–80 nm that does not precipitate in oil, has been produced using the ultrasonic dispersion of powder with oleic acid. An optimum proportion of...
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