Relaxor behavior and complex impedance studies on Ba0.9Ca0.1Ti0.9Zr0.1O3–0.06Fe3+ ceramics prepared by hydrothermal method. (October 2015)

• Record Type: Journal Article
• Authors: Liu, Yuwen; Pu, Yongping; Sun, Zixiong; Jin, Qian
• Is Part Of: Materials research bulletin. Volume 70(2015:Oct.)
• Page Start: 195
• Page End: 199
• Publication Date: 2015-10
• Subjects: A. Ceramics -- B. Chemical synthesis -- B. Piezoelectricity -- D. Dielectric properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.03.054
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Submicron ceramics of BCTZ–Fe were prepared by hydrothermal method. Sample was relaxor–ferroelectric at room temperature. The Maxwell–Wanger/Debye relaxation effects were studied. The impedance spectra were studied. Abstract: Dense ceramics in the solid solution system, Ba0.9 Ca0.1 Ti0.9 Zr0.1 O3 –0.06Fe 3+ (BCTZ–Fe 3+ ) were prepared by hydrothermal method assisted by microwave sintering. And the electrical properties were investigated by the dielectric and impedance spectroscopies. The ϵ–T /tan δ – T curve revealed relaxor behaviors below Curie temperature ( TC ) and a loss peak's shifting to higher temperature with increasing frequency. Moreover, the BCTZ–Fe 3+ ceramic exhibits only one loss peak which can be analyzed in terms of the Maxwell–Wagner capacitor model at lower temperature, while the second peak related to the space charge polarization between the ceramic and electrode appeared above 623 K. The impedance complex plane plots of BCTZ–Fe 3+ ceramic turned into one semicircular arc at 473 K from a single line at 373 K and then to two semicircular arcs at 573 K and 643 K, which were analyzed as four different equivalent circuits.