Large dielectric response of 0.6PMN-0.4PZN relaxor ferroelectric ceramic for multilayer capacitors. Issue 4 (27th December 2019)

• Record Type: Journal Article
• Authors: Takarkhede, Mamta V.; Band, Sheela A.
• Is Part Of: Ferroelectrics. Volume 46:Issue 4/6(2020)
• Page Start: 111
• Page End: 123
• Publication Date: 2019-12-27
• Subjects: Ceramics -- perovskite -- dielectric constant -- pyrochlore -- relaxor; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/07315171.2019.1570767
• Languages: English
• ISSNs: 0731-5171

Abstract

Abstract: 0.6PMN-0.4PZN solid solution ceramic was synthesized employing two stage columbite route using sintering temperature range 1000–1170 °C for calcination temperature 800 °C and 850 °C, respectively. XRD and SEM characterization revealed single perovskite phase formation in ceramic between 1050 °C to 1100 °C. The highest density upto 94% was achieved for the composition under study. The excellent dielectric properties were obtained at lower sintering temperature 1000–1100 °C. Ceramics sintered between 1000 °C–1100 °C exhibit εmax ≈14000 and 24000 at 1 kHz with Tc = 51–48 °C which is near room temperature. A good correlation was obtained between dielectric properties with structure, microstructure and density. The TCC values within the limit of Z5U capacitor specification reflect ceramics of composition 0.6PMN-0.4PZN is a potential candidate for MLC.