NDLI: Effects of Nb doping in lead barium zirconate ceramics

Content Provider	IEEE Xplore Digital Library
Author	Fraygola, B. Salazar, U. Biancoli, A. Damjanovic, D. Setter, N.
Copyright Year	2013
Description	Author affiliation: Ceramic Lab. LC, Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland (Fraygola, B.; Biancoli, A.; Damjanovic, D.; Setter, N.) \|\| Inst. de Fis. de la Benemerita, Univ. Autonoma de Puebla, Puebla, Mexico (Salazar, U.)
Abstract	The electromechanical properties of ferroelectric materials can be modified by doping in order to meet the requirements for various applications. This is well known in PZT ceramics, in which even a very small amount of the dopant element affects macroscopic properties and makes the ferroelectric hard or soft. We investigate whether hard and soft behavior occurs also due to doping of PBZ, which, to the best of our knowledge, has not been studied before. $Pb_{0.77}Ba_{0.23}ZrO_{3}$ ceramics with 1-mol%-PbO-excess have been prepared with various Nb-dopant concentrations between 0.05 and 2 mol% by the mixed-oxide route. The densification behavior and the microstructural development, as well as ferroelectric, dielectric, and piezoelectric proper-ties were measured and analyzed. The phase analysis of the sintered solid solutions revealed sin-gle-phase perovskite for all concentrations. The results showed a different relative density and grain size dependence for samples containing >0.5 mol% additives compared to samples with <;0.5 mol% Nb. Nb doping influenced significantly the electrical characteristics. Softening and a very marked increase in the dielectric and piezoelectric characteristics were obtained for low con-centrations of $Nb^{+5}.$ The influence of the dopants and associated defects on the physical and electrical characteristics was investigated and well correlated.
Sponsorship	IEEE Ultrasonics Ferroelectr. Freq. Control Soc.
Starting Page	89
Ending Page	92
File Size	134433
Page Count	4
File Format	PDF
DOI	10.1109/ISAF.2013.6748678
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-21
Publisher Place	Czech Republic
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ceramics Niobium Temperature measurement Doping Dielectrics Dielectric measurement Powders softening PBZ ferroelectric
Content Type	Text
Resource Type	Article

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