Enhanced insulation resistance and electrical properties of BiFe1-x(Zn0.5Ti0.5)xO3-BaTiO3 lead-free piezoceramics. Issue 7 (May 2018)

• Record Type: Journal Article
• Authors: Chen, Jian-Yin; Zhang, Bo-Ping; Zhu, Li-Feng; Cheng, Shuai; Tang, Yu-Cheng
• Is Part Of: Ceramics international. Volume 44:Issue 7(2018)
• Page Start: 8409
• Page End: 8416
• Publication Date: 2018-05
• Subjects: BiFeO3-BaTiO3 -- Lead-free piezoceramics -- Phase structure -- Piezoelectric properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.02.034
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The phase structure, microstructure and electrical properties of 0.7BiFe1- x (Zn0.5 Ti0.5 ) x O3 –0.3BaTiO3 (0.00 ≤ x ≤ 0.07) (BFZT x -BT) ceramics prepared via a conventional solid-state reaction method were studied by emphasizing the effect of Bi(Zn0.5 Ti0.5 )O3 . BFZT x -BT ceramics show coexisting rhombohedral-pseudocubic ( R - PC ) phase when 0.00 ≤ x ≤ 0.05 and a single PC structure at x = 0.07. The fraction of R to PC phase ( C R / C PC ) calculated by Rietveld refinement was 53/47, 51/49, 21/79, 14/86 at x = 0.00, 0.01, 0.03 and 0.05, respectively. Adding (Zn0.5 Ti0.5 ) 3+ leads to an enhanced insulation resistance 130 GΩ·cm for x = 0.05 composition under 1 kV/mm, which is one order of magnitude higher than that at 0.00 ≤ x ≤ 0.03. Owing to the synergy effects of polarization performance and proper C R / C PC fraction, optimum electrical properties of BFZT x -BT ceramics d 33 = 135 pC/N, T c = 482 °C, k p = 25% were attained at x = 0.05. Our result indicates that the formation of ternary solid solution is an effective and convenient strategy to enhance the electrical performance of BF-BT based piezoceramics by tailoring insulation resistance along with the phase structure.