Studies on electrical and dielectric properties of co-precipitated Aurivillius phase Ca1−xBaxBi2Nb2O9 ceramics. Issue 7 (15th May 2016)

• Record Type: Journal Article
• Authors: Phadtare, Varsha D.; Puri, Vijaya R.
• Is Part Of: Ceramics international. Volume 42:Issue 7(2016)
• Page Start: 8581
• Page End: 8586
• Publication Date: 2016-05-15
• Subjects: D. Niobate -- Aurivillius -- Co-precipitation -- Ferroelectric; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.02.087
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Polycrystalline samples of lead free Ca1− x Ba x Bi2 Nb2 O9 ceramics has been synthesized by simple chemical co-precipitation method. Single phase layered perovskite structure was confirmed by X-ray diffraction with average crystallite size in the range of 46–57 nm. Randomly oriented grains with inhomogeneous morphology was observed by scanning electron microscopy. Study of dielectric constant and corresponding tangent loss was carried out in the frequency range of 1 Hz to 5 MHz at room temperature. Ca1− x Ba x Bi2 Nb2 O9 shows maximum value of dielectric constant of 535 at 1 Hz. The highest polarization of 0.026 μC/cm 2 was obtained at an applied electric field of 10 kV/cm using PE loop measurement.