Hysteresis measurements of lead-free ferroelectric ceramics BNBK79 (Bi0.5Na0.5) TiO3-(Bi0.5K0.5) TiO3-BaTiO3
Result description
The research deals with nonlinear properties of piezoelectric, ferroelectric and mechanical response of the lead-free type ferroelectric ceramics x(Bi0.5 Na0.5) TiO3 - y(Bi0.5 K0.5) TiO3 - zBaTiO3, where x = 0.79, y = 0.14, and z = 0.07, in short form BNBK79. Small mechanical deformation and polarization measurements are realized using LVDT (Linear Variable Differential Transformer) measuring system. Velocities of ultrasound wave propagation in presence of an external DC electric field are also determined. The orientation of spontaneous polarization can be switched under the action of sufficiently strong electric fields. This causes the nonlinear behaviour of polarization-electric field(D-E), strain-electric field (S-E) and the velocity of ultrasonic waves-electric field (v-E) relationship. Butterfly shape of the responses is observed above the coercive field. The described BNBK79 ceramics is significant candidate for lead-free actuator applications.
Keywords
Lead-free piezoelectric ceramicsFerroelectric propertiesUltrasound wave propagationBNBK79
The result's identifiers
Result code in IS VaVaI
Result on the web
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5936495
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Hysteresis measurements of lead-free ferroelectric ceramics BNBK79 (Bi0.5Na0.5) TiO3-(Bi0.5K0.5) TiO3-BaTiO3
Original language description
The research deals with nonlinear properties of piezoelectric, ferroelectric and mechanical response of the lead-free type ferroelectric ceramics x(Bi0.5 Na0.5) TiO3 - y(Bi0.5 K0.5) TiO3 - zBaTiO3, where x = 0.79, y = 0.14, and z = 0.07, in short form BNBK79. Small mechanical deformation and polarization measurements are realized using LVDT (Linear Variable Differential Transformer) measuring system. Velocities of ultrasound wave propagation in presence of an external DC electric field are also determined. The orientation of spontaneous polarization can be switched under the action of sufficiently strong electric fields. This causes the nonlinear behaviour of polarization-electric field(D-E), strain-electric field (S-E) and the velocity of ultrasonic waves-electric field (v-E) relationship. Butterfly shape of the responses is observed above the coercive field. The described BNBK79 ceramics is significant candidate for lead-free actuator applications.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
GA202/07/1289: Electromechanical properties of aadvanced ferroelectrics materials
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
2011 10th International Workshop on Electronics, Control, Measurement and Signals (ECMS)
ISBN
978-1-61284-396-4
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
1-4
Publisher name
IEEE, 445 Hoest Lane, P.O.Box 1331, Piscataway, NJ 08855-1331 USA
Place of publication
Liberec
Event location
Liberec
Event date
Jan 1, 2011
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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Basic information
Result type
D - Article in proceedings
CEP
BM - Solid-state physics and magnetism
Year of implementation
2011