Hafnium oxide nano-particles with ferroelectric phase and preparation method of hafnium oxide nano-particles

The invention relates to hafnium oxide nanoparticles with a ferroelectric phase and a preparation method of the hafnium oxide nanoparticles. The preparation method comprises the following steps: S1, mixing polycrystalline hafnium oxide and a dopant to obtain a reactant system; s2, mixing the reactant system and molten salt to obtain a mixed system; s3, reacting the mixed system at a preset temperature for a preset time to obtain an initial product; and S4, cleaning the head product to obtain the hafnium oxide nanoparticles with the ferroelectric phase. Polycrystalline hafnium oxide and the dopant react in the molten salt environment to obtain the hafnium oxide nanoparticles with the ferroelectric phase, and the preparation method is simple, does not need to use an organic solvent, and is low in reaction temperature and short in reaction time. The prepared hafnium oxide nanoparticles with the ferroelectric phase are not easily connected with one another, and are good in dispersity. 本发明涉及一种具有铁电相的氧化铪纳米颗粒及其制备方法。制