Influence of fabrication processing on perovskite phase formation of KNN-BZT

• Main Authors: M. Sutapun, R. Muanghlua, C. C. Huang, D. P. Cann, W. C. Vittayakorn, N. Vittayakorn
• Format: Book Series
• Published: 2018
• Subjects: Engineering
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=62949226905&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/60405
• Institution: Chiang Mai University

The binary system of (1-x)(K1/2Na1/2)NbO 3-xBi(Zni/2Ti1/2)O3; x = 0.0-0.30 ceramics was fabricated by conventionally mixed oxide and two-stage mixed oxide methods. Phase development of calcined powders and the crystal structure of sintered ceramics were analyzed by X-ray diffraction (XRD). The microstructure analyses were undertaken by scanning electron microscopy (SEM). In the conventional method, the perovskite phases were obtained for compositions containing only 10 mol % KNN. For compositions above this amount, a complex mixture of phases was observed. However, the complete solid solution of perovskite phase, prepared by two-stage mixed oxide, was retained up to 20 mole % BZT content. The experiments in this study suggest that the two-stage mixed oxide method helps to stabilize the perovskite phase better, when compared with the conventional method. © 2008 Trans Tech Publications, Switzerland.