Indian Journal of Engineering & Materials Sciences

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Enhanced Ferroelectric and Dielectric Properties in Bi0.5 Na0.5 TiO3 Doped with BaTiO3 (BNT-BT) Nanoparticles for High Energy Storage Device


Affiliations
1 Materials Analysis & Research Laboratory, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
 

Nanoparticles of lead-free Bi0.5Na0.5TiO3 doped with BaTiO3 (BNT-BT) have been fabricated by the auto-combustion sol-gel method. A structural and morphological analysis of the developed material has been performed by using XRD and FESEM. Also, a temperature and frequency (100Hz-1MHz) dependent dielectric study of BNT-BT nanoparticles has been conducted, resulting in a variation that occurs at 120.83 °C due to transition from ferroelectric to antiferroelectric phase, followed by a sudden increase due to paraelectric phase formation. Additionally, as frequency increased, the dielectric constant decreased exhibiting Maxwell-Wagner polarization. The ferroelectric study has been done by using PE loop at room temperature (28 °C). The maximum value obtained for remanent polarization and saturation polarization is 1.73 μC/cm2 and 3.75 μC/cm2 respectively at an applied electric field of 28 kV/cm. The value for the recoverable energy storage density (W1) is 0.0483 J/cm3, energy loss density(W2) is 0.05378 J/cm3 and its efficiency (Ƞ) is 47% at an applied field 28 kV/cm. The obtained results for the BNT-BT nanoparticles are remarkable for energy storage devices, and they further indicate their potential for energy harvesting and high piezoelectric sensors for industrial purposes.

Keywords

Dielectric, Energy Storage, Ferroelectric, Nanoparticles, Polarization.
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  • Enhanced Ferroelectric and Dielectric Properties in Bi0.5 Na0.5 TiO3 Doped with BaTiO3 (BNT-BT) Nanoparticles for High Energy Storage Device

Abstract Views: 48  |  PDF Views: 30

Authors

Manju Kumari
Materials Analysis & Research Laboratory, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
Neeraj Dhariwal
Materials Analysis & Research Laboratory, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
Preety Yadav
Materials Analysis & Research Laboratory, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
Vinod Kumar
Materials Analysis & Research Laboratory, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
O. P. Thakur
Materials Analysis & Research Laboratory, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India

Abstract


Nanoparticles of lead-free Bi0.5Na0.5TiO3 doped with BaTiO3 (BNT-BT) have been fabricated by the auto-combustion sol-gel method. A structural and morphological analysis of the developed material has been performed by using XRD and FESEM. Also, a temperature and frequency (100Hz-1MHz) dependent dielectric study of BNT-BT nanoparticles has been conducted, resulting in a variation that occurs at 120.83 °C due to transition from ferroelectric to antiferroelectric phase, followed by a sudden increase due to paraelectric phase formation. Additionally, as frequency increased, the dielectric constant decreased exhibiting Maxwell-Wagner polarization. The ferroelectric study has been done by using PE loop at room temperature (28 °C). The maximum value obtained for remanent polarization and saturation polarization is 1.73 μC/cm2 and 3.75 μC/cm2 respectively at an applied electric field of 28 kV/cm. The value for the recoverable energy storage density (W1) is 0.0483 J/cm3, energy loss density(W2) is 0.05378 J/cm3 and its efficiency (Ƞ) is 47% at an applied field 28 kV/cm. The obtained results for the BNT-BT nanoparticles are remarkable for energy storage devices, and they further indicate their potential for energy harvesting and high piezoelectric sensors for industrial purposes.

Keywords


Dielectric, Energy Storage, Ferroelectric, Nanoparticles, Polarization.

References