Dielectric, strain engineering and microstructural studies of La modified (Bi0.5Na0.5)0.94 Ba0.06TiO3 relaxor ferroelectrics.
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| Title: | Dielectric, strain engineering and microstructural studies of La modified (Bi |
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| Authors: | Ibrar, Muhammad1 (AUTHOR), Ullah, Amir1 (AUTHOR) amirullah@icp.edu.pk, Ullah, Mateen1 (AUTHOR), Rehman, Muneeb ur1 (AUTHOR), Ullah, Aman2 (AUTHOR), Rahman, Atta ur3 (AUTHOR), Khan, Amir Sohail4 (AUTHOR), Ahn, Chang Won5 (AUTHOR) |
| Source: | Journal of Materials Science: Materials in Electronics. Jan2025, Vol. 36 Issue 3, p1-11. 11p. |
| Abstract: | A series of lead-free [(Bi0.5Na0.5)0.94 Ba0.06](1-x)LaxTiO3 (abbreviated as BNBTLa) with x = 0, 0.01, 0.02, 0.03 and 0.04 piezoelectric compound were synthesized using solid solution method. The structure, electromechanical and electrical properties were studied in detail. X-ray diffraction (XRD) analysis confirmed a rhombohedral symmetry for undoped, while La-doped compositions displayed a pseudocubic phase. The field-emission scanning electron microscopy (FE-SEM) of BNBTLa compound presented a decrease in grain size from 1.01 μm (x = 0), to 0.82 μm (x = 0.04). The ferroelectric-relaxor transition temperature (TF-R) shifted down to room temperature and the diffusivity (γ) values ranged between 1 and 2. The P-E hysteresis loops profile became slimmer with the doping of La contents with reduction in remnant polarization Pr and coercive field (EC). A normalized strain of 485 pm/V was found for the sample x = 0.03. These characteristics of the BNBTLa system signified a transition from the ferroelectric to the relaxor phase. Therefore, the prepared ceramics offered extendable availability for environmental friendly capacitors, sensors and actuators. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | A series of lead-free [(Bi0.5Na0.5)0.94 Ba0.06](1-x)LaxTiO3 (abbreviated as BNBTLa) with x = 0, 0.01, 0.02, 0.03 and 0.04 piezoelectric compound were synthesized using solid solution method. The structure, electromechanical and electrical properties were studied in detail. X-ray diffraction (XRD) analysis confirmed a rhombohedral symmetry for undoped, while La-doped compositions displayed a pseudocubic phase. The field-emission scanning electron microscopy (FE-SEM) of BNBTLa compound presented a decrease in grain size from 1.01 μm (x = 0), to 0.82 μm (x = 0.04). The ferroelectric-relaxor transition temperature (TF-R) shifted down to room temperature and the diffusivity (γ) values ranged between 1 and 2. The P-E hysteresis loops profile became slimmer with the doping of La contents with reduction in remnant polarization Pr and coercive field (EC). A normalized strain of 485 pm/V was found for the sample x = 0.03. These characteristics of the BNBTLa system signified a transition from the ferroelectric to the relaxor phase. Therefore, the prepared ceramics offered extendable availability for environmental friendly capacitors, sensors and actuators. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 09574522 |
| DOI: | 10.1007/s10854-025-14317-w |
