Preparation method and application of nano dysprosium oxide particles

The invention discloses a preparation method and application of nano dysprosium oxide particles, and belongs to the technical field of rare earth material preparation. The preparation method comprises the following steps: preparing a dysprosium nitrate solution; deionized water is added into the reactor, the temperature is raised to 50-70 DEG C, and a surfactant is added; slowly dropwise adding a dysprosium nitrate solution for 2-3 hours, controlling the temperature to be 50-70 DEG C, dropwise adding an ammonium carbonate solution to control the pH value of the system to be 5.5-7.5, stirring for 1-2 hours after dropwise adding is finished to obtain a white precipitate, and filtering and washing to obtain a wet product; and roasting, crushing and sieving the wet product to obtain the nano dysprosium oxide. By using the prepared polymer surfactant, agglomeration of dysprosium oxide particles in the coprecipitation process is avoided, and the prepared nano dysprosium oxide particles are uniform in size and have