Effect of la <inf>2</inf>O<inf>3</inf> addition on electrical properties of PZN-PZT based ceramics

• Main Authors: Tanabat Promjun, Apichart Limpichaipanit, Komsanti Chokethawai, Supon Ananta, Athipong Ngamjarurojana
• Format: Journal
• Published: 2018
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84891811825&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/48167
• Institution: Chiang Mai University

In this study, compositions in the 0.2Pb(Zn1/ 3 Nb2/ 3 )O 3 -0.8Pb(Zr1/ 2 Ti1/ 2 )O 3 based systems will be developed based on the material engineering approach (processing vs. electrical properties). This work involves the fabrication of high purity PZN-PZT based in ceramic forms, and a study of La 2 O 3 addition on phase formation, microstructures and electrical properties was investigated which are especially important from the viewpoint of the development of practical piezoelectric materials. The effect of La 2 O 3 addition was characterized on microstructure and electrical properties of PZN-PZT. Amounts of 0.05-1 wt% La 2 O 3 were doped on 0.2PZN-0.8PZT. All compositions of powders were uniaxially pressed in pellets and sintered at the temperature 1250°C with dwell time 2 h. Phase and microstructure development, dielectric and ferroelectric properties of ceramics were characterized by XRD, SEM, LCR meter and Modified Sawyer-Tower Circuit respectively. In addition, the values of permittivity maximum and the temperature of permittivity maximum were substantially decreased by La-doping and these results show increased Pr, P s and strain level but decreased E c . © 2013 Copyright Taylor and Francis Group, LLC.