Electrical properties and phase transition of Ba(Zr0.05Ti0.95)1 − x(Fe0.5Ta0.5)xO3 ceramics. (September 2015)

• Record Type: Journal Article
• Authors: Kruea-In, C.; Rujijanagul, G.
• Is Part Of: Materials research bulletin. Volume 69(2015:Sep.)
• Page Start: 36
• Page End: 40
• Publication Date: 2015-09
• Subjects: A. Creamics -- B. Phase transition -- D. Ferroelectricity -- D. Dielectric properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.01.027
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Properties of of Ba(Zr0.05 Ti0.95 )1 − x (Fe0.5 Ta0.5 ) x O3 ceramics were investigated. Small amount of dopant produced a large change in dielectric and phase transition. A phase diagram of Ba(Zr0.05 Ti0.95 )1 − x (Fe0.5 Ta0.5 ) x O3 ceramics was proposed. Dielectric tunability increased with increasing x concentration. Abstract: In this work, properties of Ba(Zr0.05 Ti0.95 )1 − x (Fe0.5 Ta0.5 ) x O3 ceramics with 0.00≤ x ≤0.07 were investigated. The ceramics were fabricated by a solid state reaction technique. X-ray diffraction analysis indicated that all samples exhibited single phase perovskite. Examination of the dielectric spectra revealed that the Fe and Ta additives promoted a diffuse phase transition, and the two phase transition temperatures, as observed in the dielectric curve of pure Ba(Zr0.05 Ti0.95 )O3, merged into a single phase transition temperature for higher x concentrations. The transformation was confirmed by ferroelectric measurements. In addition, the doped ceramics exhibited high relative dielectric tunability, especially for higher x concentration samples.