相变区附近BNT-BKT-BT陶瓷铁电和压电性能的对比研究

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone.

作者信息

Fernandez-Benavides David Andres, Gutierrez-Perez Aixa Ibeth, Benitez-Castro Angelica Maria, Ayala-Ayala Maria Teresa, Moreno-Murguia Barbara, Muñoz-Saldaña Juan

机构信息

Centro de Investigación y de Estudios Avanzados del IPN, Lib. Norponiente No. 2000, Fracc. Real de Juriquilla 76230, Querétaro, Qro. Mexico.

出版信息

Materials (Basel). 2018 Mar 1;11(3):361. doi: 10.3390/ma11030361.

DOI:10.3390/ma11030361

PMID:29494486

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5872940/

Abstract

We report a comprehensive comparative study of ferroelectric and piezoelectric properties of BNT-BKT-BT ceramics through the MPB (morphotropic phase boundary) zone, from the rhombohedral to the tetragonal phases in the system (97.5-)(BiNa)TiO₃ + (BiK)TiO₃ + 2.5(BaTiO₃), where = 0 to 24.5 mol %. The structural transitions were studied by XRD patterns and Raman spectra. The MPB was confirmed between = 10 and 12.5 mol % BKT. The dielectric/ferroelectric/piezoelectric properties of the BNT-BKT-BT system are maximized in the MPB region exhibiting a dielectric constant of 1506, a remanent polarization of 34.4 μC/cm², a coercive field = 36.9 kV/cm, and piezoelectric values of = 109 pC/N, = 0.52, and = 0.24. Changes in microstructure as a function of BKT content are also presented and discussed.

摘要

我们报告了一项关于BNT-BKT-BT陶瓷铁电和压电性能的全面比较研究，该研究通过MPB（准同型相界）区域，涵盖了体系(97.5 - )(BiNa)TiO₃ + (BiK)TiO₃ + 2.5(BaTiO₃)中从菱方相到四方相的范围，其中 = 0至24.5摩尔%。通过XRD图谱和拉曼光谱研究了结构转变。在BKT含量为10至12.5摩尔%之间确认了MPB。BNT-BKT-BT体系的介电/铁电/压电性能在MPB区域达到最大值，表现出介电常数为1506、剩余极化强度为34.4 μC/cm²、矫顽场 = 36.9 kV/cm，以及压电值 = 109 pC/N、 = 0.52和 = 0.24。还展示并讨论了微观结构随BKT含量的变化。