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Enhanced energy storage properties of La3+ modified 0.92Bi0.5Na0.5TiO3 -0.06Ba(Zr0.2Ti0.8)O3-0.02NaNbO3 ternary ceramic system
- Source :
- Materials Research Express. 8:045506
- Publication Year :
- 2021
- Publisher :
- IOP Publishing, 2021.
-
Abstract
- The development in field of hybrid vehicles, telecommunication and energy sectors require dielectric materials having high-energy storage density with optimum thermal stability to operate in certain environment. To fulfil such requirement a new set of materials along the ternary solid solutions of 0.92Bi0.5(1-x)-La(x)Na0.5TiO3 -0.06Ba(Zr0.2Ti0.8)O3-0.02NaNbO3 (NB1-xLxT-BZT-NN) (x = 0, 0.03, 0.05, 0.07) were fabricated through solid-state mix oxide route. The XRD patterns analysis confirmed a structural phase transformation from rhombohedral to the tetragonal-P4bm phase when x content increased from 0 to 0.07. The SEM study revealed, dense microstructure for all ceramics accompanied by a decrease in the average grain from 1.66 μm to 1.05 μm leading to high densities for these materials with an increase in the x content. The dielectric breakdown field increased from ∼115 to 137 kV cm−1 resulting in an increase in recoverable energy density from ∼0.68 to 1.14 J cm−3 with the increase in x content. Furthermore, excellent temperature stability (±15%) in dielectric permittivity was observed in a wide temperature range for each ceramic. In the present study, a recoverable energy density of 1.14 J cm−3 along with an efficiency of 70.6% was obtained for the composition of x = 0.07.
Details
- ISSN :
- 20531591
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Materials Research Express
- Accession number :
- edsair.doi...........27341bea8ab3b556ce426c834f288e4a