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Title: Electrical properties of BNKTZ ceramics as a function of calcination temperature
Authors: Pichitchai Butnoi
Supalak Manotham
Pharatree Jaita
Ratabongkot Sanjoom
Denis Russell Sweatman
Gobwute Rujijanagul
Tawee Tunkasiri
Keywords: Engineering
Materials Science
Physics and Astronomy
Issue Date: 1-Jan-2016
Abstract: © 2016 Trans Tech Publications, Switzerland. In this research, the Bi0.5(Na0.80K0.20)0.5Ti0.99Ti0.10O3were prepared via a conventional solid-state reaction method, and their properties were related with calcination temperature. The crystalline structure of BNKTZ ceramics was assessed by X-ray diffraction (XRD) method. Other physical properties, i.e. porosity, density, microstructure, and electrical properties were determined. XRD patterns for all samples showed a pure perovskite, where coexistence between rhombohedral and tetragonal phases was observed for some conditions. The optimum dielectric constant was obtained for the ceramic calcined at 800 °C. The ferroelectric and piezoelectric properties were improved and showed the highest values for the calcination temperature around 900-1000°C. The improvements of ferroelectric and piezoelectric properties were proposed to be due to the ceramics had compositions closed to MPB composition. Furthermore, density also had a contribution for the improvements.
ISSN: 02555476
Appears in Collections:CMUL: Journal Articles

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