Ferroelectric Lead metaniobate and its solid solutions: Solid state synthesis and characterization

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI:10.1109/ISAF.2012.6297854

M. Sahini, T. Grande, N. Setter

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引用次数: 1

Abstract

Orthorhombic Lead metaniobate (PbNb₂O₆) exhibits ferroelectric properties and has a Curie temperature, T_C of 570°C. This work reports on investigations made on ferroelectric Lead metaniobate, (PN) and its solid solutions with bismuth and titanium Pb_(1-X)Bi_X(Nb_(1-X/2)Ti_X/2)2O₆, (PBTN), bismuth and sodium Pb_(1-X)Bi_X/2Na_X/2Nb₂O₆, (PBNN), bismuth and potassium Pb_(1-X)Bi_X/2K_X/2Nb₂O₆,(PBKN), and calcium and titanium (1-x)PbNb₂O₆-xCaTiO₂, (PCTN). The ferroelectric polymorph was obtained for all the solid solutions without quenching, and the optimized sintering temperature was reduced with increasing substitution level except in the system PCTN. The lattice parameters of the solid solutions were found to systematically vary with composition. Curie temperature was reduced with increasing substitution level in all the series. Piezoelectric charge constant d33 increases with composition of the solid solutions.

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铁电型偏铌酸铅及其固溶体:固态合成与表征

偏溴酸铅(PbNb2O6)具有铁电性质，居里温度为570℃。本文报道了铁电性偏铌酸铅(PN)及其与铋和钛的固溶体Pb(1-X)BiX(Nb(1-X/2)TiX/2)2O6 (PBTN)、铋和钠Pb(1-X)BiX/2NaX/2Nb2O6 (PBNN)、铋和钾Pb(1-X)BiX/2KX/2Nb2O6 (PBKN)、钙和钛(1-X) PbNb2O6-xCaTiO2 (PCTN)的研究。除PCTN体系外，其余固溶体均可在不淬火的情况下获得铁电晶型，且随着取代水平的增加，烧结温度逐渐降低。固溶体的晶格参数随组成的变化而变化。居里温度随取代量的增加而降低。压电电荷常数d33随固溶体组成的增加而增大。

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Proceedings of ISAF-ECAPD-PFM 2012

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