Synthesis of titanium-based ceramics by a new synthetic route of water-soluble titanium complexes

抄録

We developed a new synthetic route of water-soluble complexes using TiCl₄ and Ti(SO₄)₂ as starting materials. The yield of Ti and the removal rate of the Cl⁻ ion were over 85 and 98%, respectively. The lactato titanium complex solution obtained by this new synthetic route remained stable for more than 3 months without any precipitation. Single-phase CaTiO₃, SrTiO₃, and BaTiO₃ were synthesized from the lactato titanium complex by heating at 873 K for 5 h. The nano-structured CaTiO₃, SrTiO₃, and BaTiO₃ particle sizes were 50, 30, and 30 nm in diameter, respectively, and smaller than those obtained by the solid-state method. We have succeeded in the synthesis of very fine particles of CaTiO₃, SrTiO₃, and BaTiO₃ at a temperature 400 K lower than that required for the solid-state method.