硅酸盐学报2017，Vol.45Issue(3)：346-353,8.DOI:10.14062/j.issn.0454-5648.2017.03.04
Nd3+掺Na0.25K0.25Bi2.5Nb2O9压电陶瓷的结构与性能
Structure and Properties of Nd3+-doping Na0.25K0.25Bi2.5Nb2O9 Piezoelectric Ceramics
摘要
Abstract
Na0.25K0.25Bi2.5–xNdxNb2O9(NKBN–xNd, 0≤x≤0.40) bismuth layered structure lead-free piezoelectric ceramics were prepared by a solid-state reaction method. Effect of Nd3+doping amount on the microstructure, electrical properties of NKBN–xNd ceramics was investigated. The high-temperature conductive behavior of NKBN-0.20Nd ceramic was analyzed. The results show that all the samples possess a single bismuth layered structure. When the Nd3+ doping contentxis 0.02, the average grain size decreases, the grain size distribution becomes uniform and the density increases. A appropriate content of Nd3+ leads to the decrease of tanδand the increase ofd33. The NKBN–0.20Nd sample presents the optimal piezoelectric performance, i.e.,d33=24pC/N,Qm=2449, tanδ=0.40%, 2Pr=1.11μC/cm2. According to the impedance spectra of the NKBN–0.20Nd sample, the grain interior makes a major contribution to the electrical conduction process at a high temperature. At > 600℃, the intrinsic conduction plays a dominant role in the samples. The calculated activation energy of NKBN–0.20Nd and NKBN samples is 1.85 and 1.64eV, respectively.关键词
铋层状/压电陶瓷/Raman光谱/阻抗谱Key words
bismuth layer-structured/piezoelectric ceramics/Raman spectroscopy/complex impedance spectrum分类
化学化工引用本文复制引用
罗雨涵,江向平,陈超,涂娜,陈云婧,江兴安..Nd3+掺Na0.25K0.25Bi2.5Nb2O9压电陶瓷的结构与性能[J].硅酸盐学报,2017,45(3):346-353,8.基金项目
国家自然科学基金(51562014,51262009) （51562014,51262009）
江西省自然科学基金(20133ACB20002,20142BAB216009) （20133ACB20002,20142BAB216009）
江西省高等学校"先进陶瓷材料"科技创新团队 （）
江西省教育厅科技项目(GJJ150911,GJJ150931,GJJ150933)资助. （GJJ150911,GJJ150931,GJJ150933）
