Method for preparing a sol-gel solution which can be used for preparing a barium titanate ceramic doped with hafnium and/or with at least one lanthanide element

摘要

The invention relates to a method for preparing a sol-gel solution which can be used to prepare a barium titanate ceramic doped with hafnium and/or with at least one lanthanide element, comprising the following steps:a) a step to place a first mixture comprising a barium carboxylate and a diol solvent in contact with a second mixture comprising a titanium alkoxide and a hafnium alkoxide and/or an alkoxide of a lanthanide element in a monoalcohol solvent;b) a step to distil the mixture resulting from step a) to remove at least part of the monoalcohol solvent;c) a step to add acetic acid, under heat, to the distilled mixture of step b).