Production of Titanium-based Complex Oxide using Dissolution Reaction of Titanium

Abstract

Lead zirconate titanate is a typical piezoelectric material, but it is becoming subject to regulations, and lead-free piezoelectric ceramics are attracting attention as an alternative material that does not use lead. In this study, we attempted to fabricate piezoelectric ceramics by corrosion reaction of Ti and Bi. For example, in the preparation of Bi₄Ti₃O₁₂, NH₃ solution and Ti were first added to H₂O₂. And then, Ti was dissolved in the solution completely. Next, HNO₃ solution in which Bi dissolved was added in Ti solution above in small amounts and stirred. Ammonia was further added to mixed solution above to adjust pH. And Bi₄Ti₃O₁₂ powder was obtained after filtrating, drying and calcinating.