Effects of process parameter and excess Bi2O3 on phase formation and electrical properties of BiFeO3 ceramics

• Main Authors: Sanjoom K., Rujijanagul G.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-84891750584&partnerID=40&md5=f7c275dba4918d6ca318580fbe5610ff; http://cmuir.cmu.ac.th/handle/6653943832/7304
• Institution: Chiang Mai University

The BiFeO3 was prepared by a mixed oxide, solid-state reaction method. Excess Bi2O3 (1-7wt%) was introduced prior to powder calcination to compensate for any Bi2O3 that may have been lost from the samples due to volatilization during heat treatments. Various heating rates (1-10°C/min) were performed at the calcination state. X-ray diffraction analysis revealed that pure phase BFO was observed for the samples calcined at a low heating rate (1°C/min) and contained lower amount of Bi2O3.The higher levels of excess Bi2O 3 produced an increased in dielectric constant and dielectric loss. Further, ferroelectric behavior was improved for higher amount Bi 2O3 contented samples. © 2013 Copyright Taylor and Francis Group, LLC.