Effects of Manganese Addition on Phase Formation, and Microstructure of Barium Titanate Ceramics
Jirapa Tangsritrakul, and Rattikorn Yimnirun* Author for corresponding; e-mail address: tang_ji@yahoo.com
Volume: Vol.37 No.1 (JANUARY 2010)
Short Communication
DOI:
Received: 15 May 2009, Revised: -, Accepted: 25 June 2009, Published: -
Citation: Tangsritrakul J. and Yimnirun R., Effects of Manganese Addition on Phase Formation, and Microstructure of Barium Titanate Ceramics, Chiang Mai Journal of Science, 2010; 37(1): 165-169.
Abstract
The influence of manganese (Mn) addition on phase formation and microstructure of Ba(Ti1-xMnx)O3 ceramics (where x = 0.01 to 0.2) was investigated. The XRD analysis showed that the crystal structure of Ba(Ti1-xMnx)O3 at room temperature changed from tetragonal to hexagonal as Mn concentration increased. The microstructure of Ba(Ti1-xMnx)O3 ceramics at low Mn concentration revealed a bimodal feature consisting of well-grown plate like grains larger than 100 μm with low aspect ratios embedded in a fine-grained (about 3–5 μm) matrix. As the x value increased, the well-grown grains decreased with the extent of fine grains increased.