Effect of Nd Doping on Structural, Dielectric and Ferroelectric Properties of Ba(Zr_0.05Ti_0.95)O₃ Ceramic

Abstract

Here we are reporting influence of Nd substitution on properties of Zr modified BaTiO₃ [(BaZr_xTi_1-xO₃), BZT5)]. The composition Ba_1-xNd_x(Zr_0.05Ti_0.95)O₃ (x = 0–0.04) was prepared by conventional solid state reaction route. The sintered sample was characterized for its structural properties by XRD and Raman analysis. The dielectric properties were measured as a function of temperature in the frequency range of 100 Hz to 500 KHz. A high value of dielectric constant (∼23,000) is observed at room temperature as compared to undoped BaTiO₃ (∼2500). It also observed that the three phase transition temperatures corresponding to pure BZT5 merge with substitution and exhibit a single ferroelectric to paraelectric phase transition. The value of remnant polarization and coercive field at room temperature were obtained from polarization vs electric field loop measurement on unpoled ceramic sample.

Keywords:

• Ceramics
• BZT
• sintering
• dielectric
• piezoelectric
• doping

Acknowledgment

This work was financially supported by Solid State Physics Lab., (DRDO) Delhi, INDIA.