Effect of Na/Ce codoping on the crystal structure and electrical properties of BaBi8Ti7O27 ferroelectric ceramics. Issue 9 (1st May 2022)

• Record Type: Journal Article
• Authors: Fan, Wenying; Jiang, Xiangping; Huang, Xiaokun; Nie, Xin; Chen, Chao; Yuan, Jiajun
• Is Part Of: Ceramics international. Volume 48:Issue 9(2022)
• Page Start: 12914
• Page End: 12923
• Publication Date: 2022-05-01
• Subjects: Piezoelectricity -- Ferroelectricity -- BaBi8Ti7O27 -- Thermostability; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.01.164
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Ba(1- x ) (Na0.5 Ce0.5 ) x Bi8 Ti7 O27 (BBIT: x (NC)) intergrowth bismuth layer-structured piezoelectric ceramics with enhanced piezoelectric and ferroelectric properties were synthesized by the traditional solid-state reaction process. Our systematic investigations show that the BBIT: x (NC) ceramics have a single intergrowth structure with an orthogonal phase. The reason of the internal bias field in BBIT: x (NC) ceramics was analyzed by atmosphere sintering, which was related to the defects of Na/Ce doped BBIT ceramics. Moreover, the electrical properties of Na/Ce co-doped BBIT ceramics were significantly improved. The sample with doping content x = 0.3 exhibits the most excellent piezoelectric constant d 33 of 21.8 pC/N and a high Curie temperature T c of 541 °C, which may be attributed to the enhancement of ferroelectric polarization and lattice mismatch, respectively. In addition, the remnant polarization (2 P r ) was improved from 16.8 μC/cm 2 to 20.2 μC/cm 2, and the d 33 was 20.6 pC/N after annealing at 450 °C, indicating that the ceramic samples had good thermal stability. Our results suggest that BBIT: 0.3(NC) ceramics may be a promising candidate for high-temperature piezoelectric applications.