Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1531247 | Materials Science and Engineering: B | 2007 | 7 Pages |
Abstract
Ceramic compositions of [Pb1âxâyLaxSry][(ZrzTi1âz)(1â(x/4)â(5/4)k)Nbk]O3 (PLSZTN), where y = 0, 0.5, 1.0 and 1.5 mol% have been fabricated by solid-state reaction method. Introduction of strontium in PLZTN lattice showed ferroelectric tetragonal nature and further increment of Sr2+ favored intensified tetragonality. Microstructure studies revealed that grain growth enhanced with the addition of Sr2+ and inter-diffusion between multiple ions promoted apparent density in the ceramics. The substitution of isovalent Sr2+ at Pb-site and donor pentavalent Nb5+ at Zr/Ti-site enhanced the dielectric constant (ÉRT = 2384) while decreasing the Curie temperature (Tc). The substitution of 1.5 mol% Sr evidently increased ferroelectric properties (remanent (Pr = 32.66 μC/cm2) and spontaneous (Ps = 38.54 μC/cm2) polarization), respectively. Sr-modified PLZTN showed a significant influence on the piezoelectric properties which enhanced till 1.5 mol% Sr in PLZTN ceramic system, which may be applicable for possible sensor and actuator applications.
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Authors
Koduri Ramam, Marta Lopez,