[22a-12P-1~11] 9.1 Dielectrics, ferroelectrics

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[22a-12P-11] Self-poling and piezoelectric properties of Mn doped Pb(Mg_1/3Nb_2/3)O₃-Pb(ZrTi)O₃ single crystals grown by solid state crystal growth process

〇Hiroshi Maiwa¹, Yushi Yamagata¹, Yu Xiang¹, Haiyang Sun¹, Yohachi Yamashita^1,2, Ho-Yong Lee³ (1.Shonan Inst. Tech., 2.NC State Univ., 3.Ceracomp Co. Ltd.)

Keywords:

piezoeletrics,Self poling,Solid state crystal growth

Non-poled Mn-doped Pb(Mg_1/3Nb_2/3)O₃-Pb(Zr,Ti)O₃ (PMN-PZT) single crystals prepared by solod state crystal growth showed a clear impedance despite being unpolarized, with k< sub>31 of 0.3, kt of 0.4, and d33 of 520 pC/N. These properties were superior to Mn-doped PZT-based ceramics such as PZT4 and PZT8, and most non-lead piezoelectric materials. Applying a forward DC voltage without polarization reversal to the unpolarized sample (NOP) resulted in higher d33 values of 850 - 920 pC/N compared to the opposite DC voltage direction (reverse direction) to the NOP (620 - 810 pC/N).