Sinterbility of (Bi1-xLaxTi3O12 ceramics

• Main Authors: Siriprapa P., Watcharapasorn A., Jiansirisomboon S.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-62949220241&partnerID=40&md5=24a59dc2e9aa6e096ad5bb8060635f0b; http://cmuir.cmu.ac.th/handle/6653943832/5370
• Institution: Chiang Mai University

This research studied the effects of sintering temperature and La 3+ doping content on phase, microstructure and densification of bismuth lanthanum titanate (Bi4-xLaxTi3O 12; BLT) ceramics when x = 0, 0.25, 0.5, 0.75 and 1.0, respectively. The BLT powders were prepared using a mixed-oxide method. The mixtures were calcined at 750°C for 4 h before being pressed and sintered at 1000-1150°C for 4 h. The result of phase analysis by X-ray diffraction (XRD) indicated the existence of orthorhombic phase for all sintering temperatures. The XRD peak intensities of the ceramics showed preferred orientation of a particular set of {001}-type planes. The ceramics mainly composed of plate-like grains. Increasing the sintering temperature increased grain size and increased preferred grain orientation. The present of La3+ in BLT ceramics reduced preferred orientation especially at higher sintering temperature. Results of microstructural investigation agreed well with X-ray diffraction patterns. © 2008 Trans Tech Publications, Switzerland.