• Dielectric properties of Na1–𝑥K$_x$NbO3 in orthorhombic phase

• # Fulltext

https://www.ias.ac.in/article/fulltext/boms/026/06/0619-0625

• # Keywords

Ferroelectrics; antiferroelectrics; perovskite; dielectric constant and loss; sintering; positive temperature coefficient of resistivity.

• # Abstract

Pellets of ceramic, Na1–𝑥K𝑥NbO3 (𝑥 = 0, 0.2 and 0.5), were prepared by conventional solid-state reaction method. Prepared samples were characterized using XRD and SEM. The frequency and temperature variation of dielectric constant, loss tangent and dielectric conductivity of prepared samples were measured in the frequency range from 10 KHz–1 MHz, and in the temperature range from 50–250°C for 𝑥 = 0.2 and 0.5,and between 50 and 480°C for 𝑥 = 0 compositions. It was observed that the dielectric constant and loss tangent decrease, and conductivity increases with increasing frequency. Near the transition temperature the material shows anomalous behaviour for the observed properties, and the peaks of dielectric constant and loss tangent were observed shifting towards lower temperature with increasing frequency.

• # Author Affiliations

1. Department of Physics, *University Science Instrumentation Centre, HNB Garhwal University, Srinagar (Garhwal) 246 174, India

• # Bulletin of Materials Science

Volume 43, 2020
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019