MANUFACTURING METHOD OF NANOPARTICLES OF RARE EARTH OXIDE

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PROBLEM TO BE SOLVED : To provide a simple manufacturing method of rare earth nanoparticles with no need for high pressure reaction environment and without using an organic solvent. SOLUTION : There is provided a manufacturing method of nanoparticles of rare earth oxide by adjusting pH and temperature for a solution to which an ionic surfactant is added and in which rear earth ions are dissolved, forming micelle where the rear earth ions bind to a hydrophilic group of the ionic surfactant and precipitating the same, heating and sintering a precipitate to conduct removal of an organic article and impurities and obtaining rear earth oxide particles having particles with particle diameter of 100 nm or less that occupy 95% or more by particle number. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2017, JPO&INPIT