| 摘要 |
The invention relates to a method of preparing a stable sol-gel solution as precursor of an oxide ceramic based on lead, titanium, zirconium and one or more lanthanides, comprising, in succession, the following steps: a) a sol-gel solution is prepared by bringing a lead-containing molecular precursor, a titanium-containing molecular precursor, a zirconium-containing molecular precursor and a lanthanide-metal-containing molecular precursor into contact with a medium comprising a diol solvent and optionally an aliphatic monoalcohol; b) the solution obtained in step a) is left to stand for a sufficient time needed to obtain a solution having an approximately constant viscosity; and c) the solution obtained in step b) is diluted to a predetermined amount with a diol solvent identical to that of step a) or a solvent miscible with this solvent. Application to the preparation of an oxide ceramic material comprising lead, a lanthanide metal, titanium and zirconium.
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