Effects of la-dopant on phase, microstructure and dielectric properties of Bi4Ti3O12 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-s2.0-75649119660&partnerID=40&md5=d7d6dc23b059aaa0a99397ff3d5411b0; http://cmuir.cmu.ac.th/handle/6653943832/6338
• Institution: Chiang Mai University

Bi4-xLaxTi3O12 (where x = 0, 0.25, 0.50, 0.75 and 1) powders and ceramics were prepared using conventional solid state reaction and sintering procedures. The calcination was carried out at 750 °C for 4 h and sintering was done at 1150 °C for 4 h. The density of all ceramics was found to be comparable regardless of La concentration. X-ray diffraction analysis showed that preferred orientation of ceramic grains was reduced with addition of La ions. This reduced preferred orientation was accompanied by a decrease in grain size. The temperature dependence of dielectric constant showed a decrease in Tc with increasing La concentration. © (2010) Trans Tech Publications.