Perovskite phase formation and ferroelectric properties of the lead nickel niobate-lead zinc niobate-lead zirconate titanate ternary system

• Main Authors: Vittayakorn N., Rujijanagul G., Tunkasiri T., Tan X., Cann D.P.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-0742268858&partnerID=40&md5=0df3a12f7fe52cfad3021865d757a3a2; http://cmuir.cmu.ac.th/handle/6653943832/5697
• Institution: Chiang Mai University

The ternary system of lead nickel niobate Pb(Ni1/3Nb 2/3)O3 (PNN), lead zinc niobate Pb(Zn1/3Nb 2/3)O3 (PZN), and lead zirconate titanate Pb(Zr 1/2Ti1/2)O3 (PZT) was investigated to determine the influence of different solid state processing conditions on dielectric and ferroelectric properties. The ceramic materials were characterized using x-ray diffraction, dielectric measurements, and hysteresis measurements. To stabilize the perovskite phase, the columbite route was utilized with a double crucible technique and excess PbO. The phase-pure perovskite phase of PNN-PZN-PZT ceramics was obtained over a wide compositional range. It was observed that for the ternary system 0.5PNN-(0.5 - x)PZN-xPZT, the change in the transition temperature (Tm) is approximately linear with respect to the PZT content in the range x = 0 to 0.5. With an increase in x, Tm shifts up to high temperatures. Examination of the remanent polarization (Pr) revealed a significant increase with increasing x. In addition, the relative permittivity (εr) increased as a function of x. The highest permittivities (εr = 22,000) and the highest remanent polarization (Pr = 25 μC/cm 2) were recorded for the binary composition 0.5Pb(Ni 1/3Nb2/3)O3-0.5Pb(Zr1/2Ti 1/2)O3.