[25a-P02-1~2] 9.1 Dielectrics, ferroelectrics

[25a-P02-2] K, Na composition dependence of ferroelectric properties, and average and local structures
of (K,Na,Li)NbO₃ based ferroelectrics, and Cu, Zn substitution effect

〇Kazuto Obata¹, Chiaki Ishibashi¹, Naoya Ishida¹, Naoto Kitamura¹, Yasushi Idemoto¹ (1.Tokyo Univ. of Science)

Keywords:Crystal structure

Lead zirconate titanate (PZT) is widely used as a ferroelectric material, but from the viewpoint of reducing the environmental load, we focused on K0.5Na0.5NbO3 (KNN), which has good piezoelectric properties, among lead-free materials. The purpose of this study was to improve the ferroelectric properties by changing the K and Na ratios based on a sample in which Li was replaced with KNN and substituting Cu and Zn. Furthermore, the effects of composition changes and Cu and Zn on electrical characteristics were investigated by average and local crystal structure analysis.