Processing and properties of translucent bismuth sodium titanate ceramics. Issue 2 (February 2021)

• Record Type: Journal Article
• Authors: Seifert, D.U.; Li, L.; Lee, K-Y.; Hoffmann, M.J.; Sinclair, D.C.; Hinterstein, M.
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 2(2021)
• Page Start: 1221
• Page End: 1229
• Publication Date: 2021-02
• Subjects: Bismuth sodium titanate -- Electrical properties -- Processing -- Structural properties -- Lead-free; 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.2020.10.009
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Lead-free bismuth sodium titanate piezoceramics were processed by a solid-state route with a novel precursor approach. By carefully controlling the processing parameters and sintering atmospheres, translucent ceramics with pore-free, homogeneous microstructures with exceptionally low dielectric loss at elevated temperatures. The pore-free microstructure can influence the operating life of a dielectric device positively, since pores and other microstructural defects are usually responsible for material failures within devices. Synchrotron and surface X-ray diffraction experiments revealed a clear dependence of the crystal structure on sintering parameters and defect chemistry. Microstructural analysis showed a dependency of a secondary phase on the sintering atmosphere. The grain size could be adjusted using a shortened grinding process instead of using the common methods like increasing calcining or sintering temperature.