Method for preparing ferrite powder and ferrite powder

The invention discloses a method for preparing ferrite powder. The method comprises the following steps: preparing monocrystal Fe3O4 particles by adopting a hydrothermal method; monocrystal Fe3O4 particles are used as a template, a Fe3O4-metal M hydroxide compound is prepared, metal M is selected from any one or more of metal elements except alkali metal, alkaline earth metal, aluminum (Al) and iron (Fe), and ions of the metal M can generate hydroxide precipitates under the condition of an alkaline water solution; and finally sintering to obtain ferrite powder. The preparation method has the beneficial effects that a wet chemical combined sintering method is adopted, ferrite powder with the particle size being 0.5 mu m or above can be stably prepared, and the preparation method is particularly suitable for large-scale industrial production requirements; the preparation method is simple, the particle size of the ferrite powder is easy to regulate and control, and the prepared ferrite powder is uniform in eleme