Crystal structure, microstructure, piezoelectric and dielectric properties of high-temperature piezoceramics Bi-=SUB=-3-x-=/SUB=-Nd-=SUB=-x-=/SUB=-Ti-=SUB=-1.5-=/SUB=-W-=SUB=-0.5-=/SUB=-O-=SUB=-9-=/SUB=- (x=0, 0.1, 0.2)

Author:

Zubkov S. V. 1,Parinov I. A. 2,Nazarenko A. V. 23,Kuprina Yu. A. 1

Affiliation:

1. Scientific Research Institute of Physics, Southern Federal University, Rostov-on-Don, Russia

2. I.I. Vorovich Institute of Mathematics, Mechanics and Computer Science, Southern Federal University, Rostov-on-Don, Russia

3. Southern Scientific Center, Russian Academy of Sciences, Rostov-on-Don, Russia

Abstract

A new series of perovskite-like oxides Bi3-xNdxTi1.5W0.5O9 (x=0, 0.1, 0.2) has been synthesized by the method of high-temperature solid-state reaction. The X-ray diffraction study showed that the compounds are single-phase and have the structure of the family of Aurivillius phases with parameters close to the orthorhombic unit cell corresponding to the space group A21am. The relative permittivity ε/ε0 and loss angle tangent tgsigma are measured as functions of temperature at different frequencies. The piezoelectric modulus d33 was measured for the synthesized compounds. The microstructure of Bi3-xNdxTi1.5W0.5O9 (x=0, 0.1, 0.2) was obtained. The study of the microstructure shows that the crystallites have a shape characteristic of Aurivillius phases. Keywords: Aurivillius phases, Bi2.8Nd0.2Ti1.5W0.5O9, activation energy Ea, Curie temperature TC.

Publisher

Ioffe Institute Russian Academy of Sciences

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