TY - JOUR
T1 - Peculiar properties of phase transitions in Na0.5 Bi0.5 TiO3-0.06BaTiO3 lead-free relaxor ferroelectrics seen via acoustic emission
AU - Dul'kin, Evgeniy
AU - Tiagunova, Jenia
AU - Mojaev, Evgeny
AU - Roth, Michael
N1 - Publisher Copyright:
© 2017 World Scientific Publishing Company.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Na0.5Bi0.5TiO3-0.06BaTiO3 relaxor ferroelectrics (RFEs) ceramic samples were investigated by means of dielectric and acoustic emission methods in the temperature range of 70-350C and in dependence on frequency. Dielectric curve exhibits two anomalies: strongly dispersive the local maximum, within 130-180C and slightly dispersive the smeared high-temperature maximum within 300-310C. Acoustic emission exhibits the five groups of bursts: near 123C, 150-180C, near 225C, 300-310C and 327C. The first and third groups of acoustic emission bursts correspond to phase transitions of R3c-P4bm phases coexisting in this temperature, range, while the fourth and fifth groups of acoustic emission bursts correspond to P4bm-P4/mbm-Pm3 m phase transitions. The second group of acoustic emission bursts corresponds to strongly dispersive local maximum at which no phase transition has been proved in Na0.5Bi0.5TiO3-0.06BaTiO3. The existence and the location of the intermediate temperature, T∗, in Na0.5Bi0.5TiO3-0.06BaTiO3 compound are discussed.
AB - Na0.5Bi0.5TiO3-0.06BaTiO3 relaxor ferroelectrics (RFEs) ceramic samples were investigated by means of dielectric and acoustic emission methods in the temperature range of 70-350C and in dependence on frequency. Dielectric curve exhibits two anomalies: strongly dispersive the local maximum, within 130-180C and slightly dispersive the smeared high-temperature maximum within 300-310C. Acoustic emission exhibits the five groups of bursts: near 123C, 150-180C, near 225C, 300-310C and 327C. The first and third groups of acoustic emission bursts correspond to phase transitions of R3c-P4bm phases coexisting in this temperature, range, while the fourth and fifth groups of acoustic emission bursts correspond to P4bm-P4/mbm-Pm3 m phase transitions. The second group of acoustic emission bursts corresponds to strongly dispersive local maximum at which no phase transition has been proved in Na0.5Bi0.5TiO3-0.06BaTiO3. The existence and the location of the intermediate temperature, T∗, in Na0.5Bi0.5TiO3-0.06BaTiO3 compound are discussed.
KW - Burns temperature
KW - Lead-free relaxor ferroelectrics
KW - acoustic emission
KW - intermediate temperature
KW - phase transitions
UR - http://www.scopus.com/inward/record.url?scp=85023183021&partnerID=8YFLogxK
U2 - 10.1142/S1793604717500485
DO - 10.1142/S1793604717500485
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AN - SCOPUS:85023183021
SN - 1793-6047
VL - 10
JO - Functional Materials Letters
JF - Functional Materials Letters
IS - 4
M1 - 1750048
ER -