Lead-free piezoceramics with giant strain in the system Bi[sub 0.5]Na[sub 0.5]TiO[sub 3]–BaTiO[sub 3]–K[sub 0.5]Na[sub 0.5]NbO[sub 3]. II. Temperature dependent properties

Zhang, Shan-Tao
Kounga, Alain Brice
Aulbach, Emil
Jo, Wook
Granzow, Torsten
Ehrenberg, Helmut
Rödel, Jürgen

Publication date

February 2008

DOI

Abstract

The temperature dependence of the dielectric and ferroelectric properties of lead-free piezoceramics of the composition (1−x−y)Bi0.5Na0.5TiO3–xBaTiO3–yK0.5Na0.5NbO3 (0.05 <= x <= 0.07, 0.01 <= y <= 0.03) was investigated. Measurements of the polarization and strain hystereses indicate a transition to predominantly antiferroelectric order when heating from room temperature to 150 °C, while for 150<T<200 °C both remnant polarization and coercive field increase. Frequency-dependent susceptibility measurements show that the transition is relaxorlike. For some samples, the transition temperature Td is high enough to allow mostly ferroelectric ordering at room temperature. These samples show a drastic increase of the usable strain under an extern...

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Lead-free piezoceramics with giant strain in the system Bi[sub 0.5]Na[sub 0.5]TiO[sub 3]–BaTiO[sub 3]–K[sub 0.5]Na[sub 0.5]NbO[sub 3]. II. Temperature dependent properties

Abstract

Extracted data

Lead-free piezoceramics with giant strain in the system Bi[sub 0.5]Na[sub 0.5]TiO[sub 3]–BaTiO[sub 3]–K[sub 0.5]Na[sub 0.5]NbO[sub 3]. II. Temperature dependent properties

Abstract

Extracted data

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