[10a-Z26-1~8] 9.1 Dielectrics, ferroelectrics

[10a-Z26-3] Ferroelectric properties of (K,Na)NbO3 based ferroelectrics, composition dependence of crystal structure, and Cu, Zn substitution effect

Yasushi Idemoto¹, 〇Kazuto Obata¹, Naoya Ishida¹, Naoto Kitamura¹ (1.Tokyo Univ. of Science)

Keywords:Crystal structure, Ferroelectric material

Lead zirconate titanate (PZT) is widely used as a ferroelectric material in electronic devices, but I paid attention to K_0.5Na_0.5NbO₃(KNN) has good piezoelectric characteristics among non-lead materials from the viewpoint of environmental load reduction.In this study, spark plasma sintering (SPS) was used to improve the sinterability, and I aimed at improvement.KNN was replaced with Cu and Zn for the ferroelectric properties of the sample with 5 mol% Li replaced by KNN.Furthermore, the effect of Cu and Zn on the electrical properties was investigated by crystal structure analysis using synchrotron radiation X-ray diffraction.