Changes in dielectric and ferroelectric properties of Fe3+ / Nb5+ hybrid-doped barium titanate ceramics under compressive stress

• Main Authors: Unruan M., Sareein T., Tangsritrakul J., Prasertpalichatr S., Ngamjarurojana A., Ananta S., Yimnirun R.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-58149270841&partnerID=40&md5=bc5539b3013c1800bcc2082d7b263b2f; http://cmuir.cmu.ac.th/handle/6653943832/5425
• Institution: Chiang Mai University

The influences of compressive stress on the dielectric and ferroelectric properties of Fe3+ / Nb5+ hybrid-doped barium titanate (BaTiO3) ceramics were investigated. Superimposed compressive stress had a pronounced effect on the electrical properties of the ceramics. The response of low-field dielectric properties to stress changed from soft to hard piezoelectric behavior with increasing Nb5+ content. While ferroelectric properties decreased with stress, hardening behavior was observed with increasing Nb5+ content in hybrid-doped BaTiO3 ceramics. A mechanism based on induced change in the acceptor valence by the donor dopant in hybrid-doped BaTiO3 ceramics was proposed to explain the results obtained. © 2008 American Institute of Physics.