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Thermal Depolarization in the High-Temperature Ternary Piezoelectric SystemxPbTiO3-yBiScO3-zBi(Ni1/2Ti1/2)O3

Ansell, Troy Y. and Cann, David P. and Sapper, Eva and Rödel, Jürgen (2014):
Thermal Depolarization in the High-Temperature Ternary Piezoelectric SystemxPbTiO3-yBiScO3-zBi(Ni1/2Ti1/2)O3.
98, In: Journal of the American Ceramic Society, (2), pp. 455-463, ISSN 00027820, [Online-Edition: http://dx.doi.org/10.1111/jace.13268],
[Article]

Abstract

In the high-temperature ternary perovskite piezoelectric system xPbTiO3–yBiScO3–zBi(Ni1/2,Ti1/2)O3 (PT–BS–BNiT), the addition of bismuth to the A site and nickel to the B site leads to compositions that exhibit diffuse relaxor-like behavior. For these, depolarization temperature, not Curie point, is the critical value of temperature. Depolarization temperature (Td) is defined as the temperature at which the steepest loss in polarization occurs. This temperature is observed in poled materials through two different methods: loss tangent measurements and in situ d33. Across the ternary system, multiple dielectric anomalies occurred which was observed in dielectric tests where the dielectric peak broadens and becomes frequency dependent as BNiT content increased. For different compositions, the value of Td ranged between 275°C–375°C. Values for the piezoelectric coefficient increased with temperature up to d33 = 1000 pC/N during in situ d33. High temperature (up to 190°C) and high field (up to 40 kV/cm) were also applied to test ferroelectric properties in these regimes.

Item Type: Article
Erschienen: 2014
Creators: Ansell, Troy Y. and Cann, David P. and Sapper, Eva and Rödel, Jürgen
Title: Thermal Depolarization in the High-Temperature Ternary Piezoelectric SystemxPbTiO3-yBiScO3-zBi(Ni1/2Ti1/2)O3
Language: English
Abstract:

In the high-temperature ternary perovskite piezoelectric system xPbTiO3–yBiScO3–zBi(Ni1/2,Ti1/2)O3 (PT–BS–BNiT), the addition of bismuth to the A site and nickel to the B site leads to compositions that exhibit diffuse relaxor-like behavior. For these, depolarization temperature, not Curie point, is the critical value of temperature. Depolarization temperature (Td) is defined as the temperature at which the steepest loss in polarization occurs. This temperature is observed in poled materials through two different methods: loss tangent measurements and in situ d33. Across the ternary system, multiple dielectric anomalies occurred which was observed in dielectric tests where the dielectric peak broadens and becomes frequency dependent as BNiT content increased. For different compositions, the value of Td ranged between 275°C–375°C. Values for the piezoelectric coefficient increased with temperature up to d33 = 1000 pC/N during in situ d33. High temperature (up to 190°C) and high field (up to 40 kV/cm) were also applied to test ferroelectric properties in these regimes.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 98
Number: 2
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D1: Mesoscopic and macroscopic fatigue in doped ferroelectric ceramics
11 Department of Materials and Earth Sciences > Material Science
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 05 Feb 2015 08:43
Official URL: http://dx.doi.org/10.1111/jace.13268
Additional Information:

SFB 595 D1

Identification Number: doi:10.1111/jace.13268
Funders: Deutsche Forschungsgemeinschaft (DFG). Grant Number: SFB595 project D1.
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