[18a-E317-1~10] 9.1 Dielectrics, ferroelectrics

[18a-E317-10] Effect of sintering aid and Mo, W substitution on ferroelectric characteristics, crystal and electronic structure of 0.4Bi_0.5K_0.5TiO₃-0.6BiFeO₃-based ferroelectric ceramics

Idemoto Yasushi¹, 〇Kawamoto Tsuyoshi¹, Ishida Naoya¹, Kitamura Naoto¹ (1.Tokyo Univ. Sci)

Keywords:Crystal structure, Ferroelectric, Quantum beam

Lead zirconate titanate (PZT) is widely used as a ferroelectric material used in electronic devices, but since lead oxide is toxic,lead-free material (Bi_0.5K_0.5) TiO₃-BiFeO₃ (BKTBF) based solid solution, our laboratory has investigated the relationship between the ferroelectric properties and crystal structure of BKTBF based solid solutions.In this research, focusing on (Bi_0.5K_0.5) TiO₃-BiFeO₃-KNbO₃ in which potassium niobate is solid-solved, other metal element (Mo, W) substituted samples are prepared and evaluated of ferroelectric characteristics. Crystal structure analysis was performed using synchrotron X-ray diffraction. The relationship between the ferroelectric characteristics and the crystal and electronic structures were investigated.