Enhanced piezoelectric properties of Lu2O3 doped BCTS ceramics with orthorhombic–tetragonal coexisting phase

•xLu-BCTS ceramics have perovskite structures with O-T coexisting phases.•Pr has extremely remarkable effect on d33 of xLu-BCTS ceramics.•d33 of 0.0050Lu2O3-BCTS ceramic is 111% higher than that of pure BCTS ceramic.•d33 of 0.0050Lu2O3-BCTS ceramic has a high value in BT systems studied recently. xL...

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Bibliographic Details
Published in:Materials letters 2022-03, Vol.311, p.131543, Article 131543
Main Authors: Yin, Ming, Wang, Zhen-Jie, Li, Peng, Hao, Ji-Gong, Li, Wei, Du, Juan, Li, Guo-Rong, Wang, Chun-Ming, Fu, Peng
Format: Article
Language:English
Subjects:
Barium titanates
Ceramics
Ferroelectrics
Grain size
Lutetium oxide
Materials science
Perovskites
Piezoelectric property
Piezoelectricity
Solid phases
Structural
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Summary:•xLu-BCTS ceramics have perovskite structures with O-T coexisting phases.•Pr has extremely remarkable effect on d33 of xLu-BCTS ceramics.•d33 of 0.0050Lu2O3-BCTS ceramic is 111% higher than that of pure BCTS ceramic.•d33 of 0.0050Lu2O3-BCTS ceramic has a high value in BT systems studied recently. xLu2O3-(1-x)Ba0.98Ca0.02Ti0.96Sn0.04O3 ceramics were synthesized by a solid-phase reaction method. XRD phase analysis reveals that all samples have perovskite structures with orthorhombic-tetragonal coexisting phases. Grain sizes decrease and become more uniform with increasing Lu2O3 contents. Piezoelectric coefficient d33 increases with appropriate Lu2O3 contents and attains a peak value of 598 pC/N at molar ratio (x = 0.0050) of Lu2O3, the high value of piezoelectric coefficient for BaTiO3 based ceramics reported in recent years. d33 of xLu2O3-(1-x)Ba0.98Ca0.02Ti0.96Sn0.04O3 ceramics at x = 0.0050 is 111% higher than that of pure BCTS ceramics. The maximum value of residual polarization Pr (10.2 μC/cm2) also occurs at x = 0.0050, remarkably improving d33 with appropriate Lu2O3 contents.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.131543