Ferroelectric NaNbO3 ceramics fabricated by spark plasma sintering

被引：0

作者：

Wada, Takahiro ^{[1
]}

Tsuji, Kenji ^{[1
]}

Saito, Takehisa ^{[1
]}

Matsuo, Yoshihiro ^{[1
]}

机构：

[1] Department of Materials Chemistry, Ryukoku University, Seta, Outsu 520-2194, Japan

来源：

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 2003年 / 42卷 / 9 B期

关键词：

Annealing - Antiferroelectric materials - Crystallography - Electric discharges - Electric field effects - Electromagnetic wave polarization - Ferroelectric materials - High temperature effects - Magnetic hysteresis - Piezoelectricity - Plasma applications - Sintering;

D O I：

10.1143/jjap.42.6110

中图分类号：

学科分类号：

摘要：

High-density ceramic samples of NaNbO3 (NN) have been successfully fabricated by spark plasma sintering (SPS), which is a process that uses microscopic electrical discharge between particles under pressure. The obtained NN ceramic shows a hysteresis loop characteristic of ferroelectrics. The coercive electric field, Ec, and remanent polarization, Pr, are determined to be 12 kV/cm and 0.42 μC/cm2, respectively, for an unpoled sample and 16 kV/cm and 27 μC/cm2, respectively, for a poled sample. The NN ceramic also shows piezoelectricity with a planar electromechanical coupling factor, Kp, of about 20%. The ferroelectricity and piezoelectricity in the NN ceramic are stable at high temperatures. The piezoelectric characteristic does not change after annealing at 300°C but it disappears after annealing at 350°C.

引用

页码：6110 / 6114