TY - JOUR
T1 - Grain size effect on electrical properties of Mn-modified 0.67BiFeO3-0.33BaTiO3 lead-free piezoelectric ceramics
AU - Sudo, Yui
AU - Hagiwara, Manabu
AU - Fujihara, Shinobu
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Research Activity Start-up (No. 25889049 ) from the Japan Society for the Promotion of Science ( JSPS ).
Publisher Copyright:
© 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved
PY - 2016/5/15
Y1 - 2016/5/15
N2 - To investigate how grain size affects the dielectric, ferroelectric, and piezoelectric properties of Mn-modified 0.67BiFeO3-0.33BaTiO3 ceramics, we prepared samples with a wide variety of grain sizes from 4.1 μm to 0.59 μm via a conventional solid-state process that use the normal and the two-step sintering methods. Small-signal dielectric measurements show that all the samples exhibit a relaxor-like behavior and that grain size has little influence on the room-temperature dielectric permittivity. For grain sizes below 2 μm, the remanent polarization Pr and piezoelectric coefficient d33 decrease with the grain size, whereas they remain almost constant near Pr = 27 μC/cm2 and d33 = 70 pC/N in samples with grain sizes exceeding 2 μm. The mechanism underlying the observed grain size effect is discussed in terms of the electric-field-induced formation of macroscopic ferroelectric domains.
AB - To investigate how grain size affects the dielectric, ferroelectric, and piezoelectric properties of Mn-modified 0.67BiFeO3-0.33BaTiO3 ceramics, we prepared samples with a wide variety of grain sizes from 4.1 μm to 0.59 μm via a conventional solid-state process that use the normal and the two-step sintering methods. Small-signal dielectric measurements show that all the samples exhibit a relaxor-like behavior and that grain size has little influence on the room-temperature dielectric permittivity. For grain sizes below 2 μm, the remanent polarization Pr and piezoelectric coefficient d33 decrease with the grain size, whereas they remain almost constant near Pr = 27 μC/cm2 and d33 = 70 pC/N in samples with grain sizes exceeding 2 μm. The mechanism underlying the observed grain size effect is discussed in terms of the electric-field-induced formation of macroscopic ferroelectric domains.
KW - Grain size effect
KW - Lead free
KW - Piezoelectric ceramics
KW - Relaxor
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U2 - 10.1016/j.ceramint.2016.02.030
DO - 10.1016/j.ceramint.2016.02.030
M3 - Article
AN - SCOPUS:84968447713
VL - 42
SP - 8206
EP - 8211
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 7
ER -