Enhanced sinterability and electrical properties of Bi<inf>2</inf>O<inf>3</inf>-added Ba<inf>0.85</inf>Ca<inf>0.15</inf>Zr<inf>0.1</inf>Ti<inf>0.9</inf>O<inf>3</inf>ceramics

• Main Authors: Piyaporn Jaimeewong, Paitoon Boonsong, Piyalak Ngernchuklin, Rungnapa Tipakontitikul, Anuson Niyompan, Methee Promsawat, Anucha Watcharapasorn
• Format: Journal
• Published: 2018
• Subjects: Materials Science; Physics and Astronomy
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85026635325&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/57477
• Institution: Chiang Mai University

© 2017 Taylor & Francis Group, LLC. The ceramics of Bi2O3-added Ba0.85Ca0.15Zr0.1Ti0.9O3or BCZT-xBi (where x = 0.005, 0.01, 0.02 and 0.1 mol fraction) were fabricated from sol-gel auto-combustion derived BCZT and commercial Bi2O3powders. In this study, BCZT-0.02Bi ceramic sintered at 1200°C for 2 h was found to be the optimum composition with high relative density and homogeneous microstructure. The temperature at maximum dielectric constant (Tmax) of this sample was near room temperature, rendering a high dielectric constant value (∼1653). Frequency dependence of Tmaxsuggested the relaxor behavior which was also supported by slim ferroelectric hysteresis loops. Since a relatively large breakdown voltage (> 70 kV/cm) was observed, the BCZT-0.02Bi ceramic could be a potential lead-free electrostrictive/piezoelectric material for actuator applications.