AC Conductivity and Dielectric Properties of (1- x)(0.94Bi0.5Na0.5TiO₃-0.06BaTiO₃)- x Ta Lead Free Ceramics

Wook-Hee Han; Jung-Hyuk Koh

doi:10.1166/jnn.2019.16191

AC Conductivity and Dielectric Properties of (1- x)(0.94Bi_0.5Na_0.5TiO₃-0.06BaTiO₃)- x Ta Lead Free Ceramics

J Nanosci Nanotechnol. 2019 Mar 1;19(3):1410-1414. doi: 10.1166/jnn.2019.16191.

Authors

Wook-Hee Han¹, Jung-Hyuk Koh¹

Affiliation

¹ School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 156-756, Republic of Korea.

PMID: 30469197
DOI: 10.1166/jnn.2019.16191

Abstract

Piezoelectric ceramics such as Pb(Zr,Ti)O₃ (PZT) are currently used by electronic devices because of their superb properties. Lead-based ceramics has caused a lot of environmental problems due to their toxicity. So, lead-free ceramics have been studied as an alternative method due to the toxicity of lead-based ceramics. Lead-free energy harvesting application (Bi_0.5N_0.5)TiO₃-BaTiO₃ (BNT-BT), is famous for its excellent piezoelectric and electrical properties. The substitution of BNT-BT and Ta⁵⁺ also is very effective in improving the relative dielectric permittivity and electrical properties. Because of the device performance depends on the relative dielectric permittivity, temperature and frequency of ceramic are very important condition. In this study, the electrical and relative dielectric permittivity of substitution of BNT-BT with Ta will be analyzed and AC conductivity depending on temperature and frequency will be shown. Also, it will calculate and analyze activation energy in different ranges of frequency.