Comparison of multi-valent manganese oxides (Mn4+, Mn3+, and Mn2+) doping in BiFeO3-BaTiO3 piezoelectric ceramics. Issue 15 (December 2019)

• Record Type: Journal Article
• Authors: Kim, Da Jeong; Lee, Myang Hwan; Song, Tae Kwon
• Is Part Of: Journal of the European Ceramic Society. Volume 39:Issue 15(2019)
• Page Start: 4697
• Page End: 4704
• Publication Date: 2019-12
• Subjects: BiFeO3 -- BaTiO3 -- Mn-doping -- Water-quenching; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2019.07.013
• Languages: English
• ISSNs: 0955-2219

Abstract

ABSTRACT: Different manganese oxides-doping effects were compared in piezoceramic BiFeO3 -BaTiO3 system. 0.67Bi1.05 (Fe0.99 Mn x 0.01 )O3 -0.33BaTiO3 (valence state x = 4+, 3+, and 2+) ceramics were prepared via a solid-state reaction process followed by furnace-cooling (FC) or water-quenching (WQ) process. For the FC ceramics, the direct piezoelectric sensor coefficient ( d 33 ) was almost independent of valence state of doped Mn, while d 33 depended on the fraction of Fe 3+ /Fe 2+ in WQ ceramics. The d 33 value was highest for the donor Mn 4+ -doped ceramic, among the FC ceramics, with 175 pC/N. However, acceptor-doping with Mn 2+ prevented the transition of Fe ion valence state from 3+ to 2+ in the WQ ceramics, the Mn 2+ -doped WQ ceramic showed the largest d 33 of 313 pC/N and converse piezoelectric actuator coefficient, d 33 * of 352 pm/V, with high Curie phase transition temperature (482 °C).