| abstract |
The present invention provides a process for preparing nanoparticulate zirconia or zirconia doped with at least one other metal selected from the group consisting of Ca, Mg, Y, Nb, Er, which comprises reacting a reaction solution containing at least one dissolved Zr salt and optionally a salt at least one other metal selected from the group consisting of Ca, Mg, Y, Nb, Er, and alkali metal formate or ammonium formate, irradiated with UV radiation, preferably at a wavelength of 254 nm, to form a solid phase. |