Effects of Manganese Addition on Phase Formation, Microstructure and Electrical Properties of Barium Titanate Ceramics

Abstract:

In this study, the influence of Mn addition on phase formation, microstructure and electrical properties of Ba(Ti1-xMnx)O3 where x = 0.01 to 0.2 was investigated. The XRD patterns showed that the crystal structure of Ba(Ti1-xMnx)O3 at room temperature changed from tetragonal to hexagonal as Mn concentration increased, which also caused the room temperature dielectric constant decrease from 1143 to 47. The microstructure of Ba(Ti1-xMnx)O3 ceramics at low concentration revealed a bimodal microstructure. As the x value increased, the well grown grains decreased with the extent of fine-grained increased. Ferroelectric hysteresis (P-E) loop was not clearly observed as Mn concentration increased because of the formation of paraelectric hexagonal phase

• Periodical: Advanced Materials Research (Volumes 55-57)
• Pages: 97-100
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.55-57.97
• Online since: August 2008
• Authors: Jirapa Tangsritrakul, Muangjai Unruan, Piyachon Ketsuwan, Rattikorn Yimnirun
• Keywords: Dielectric Property, Ferroelectric Property, Hexagonal, Mn-Doped BaTiO₃

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