Electrocaloric effect and energy storage in lead free Gd 0.02 Na 0.5 Bi 0.48 TiO 3 ceramic

Zannen, Moneim; Lahmar, Abdelilah; Kutnjak, Zdravko; Belhadi, Jamal; Khemakhem, H.; Marssi, M. El

doi:10.1016/j.solidstatesciences.2017.02.007

Cited by 54 publications

(18 citation statements)

References 68 publications

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“…Moreover, the leakage current density of the samples radically increases in the low electric field region, and a stabilized leakage current density is obtained upon increasing the electric field further. This is consistent with previous results . In addition, the leakage current density of the BNKTZS‐ x L ceramics decreases gradually as the value of x increases, which demonstrates the beneficial effect of adding La and facilitates energy‐storage applications.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi_0.5Na_0.5TiO₃‐Based Lead‐Free Ceramics

et al. 2017

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A series of Bi(0.5−x)Lax(Na0.82K0.18)0.5Ti0.96Zr0.02Sn0.02O3 (BNKTZS‐xL) (x=0–0.18) lead‐free ceramics were designed and fabricated by using a conventional solid‐state sintering method. The effects of the La3+ content on the properties of the BNKTZS‐xL ceramics were systematically investigated. Temperature‐dependent dielectric constant curves displayed two depressed anomalies, which resulted in significantly improved dielectric temperature stability. The polarization–electric field hysteresis loops illustrated that the addition of La3+ markedly enhanced the breakdown strength, energy‐storage density, and energy‐storage efficiency. A maximum energy‐storage density of 1.95 J cm−3 was obtained for the material with x=0.10, and the energy‐storage efficiency significantly improved from 28 to 85 % upon increasing the value of x from 0 to 0.18. These properties indicate that the BNKTZS‐xL ceramics may be promising lead‐free materials for high energy‐storage capacitor applications.

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Section: Resultsmentioning

confidence: 99%

Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi_0.5Na_0.5TiO₃‐Based Lead‐Free Ceramics

et al. 2017

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“…The XRD patterns were refined with pattern matching different space groups such as

R 3 c, Cc, normalP 4 mm, Pbnm

, and

P 4 bm

etc. It is well known reported that RT pure NBT is as a stable rhombohedral with R3c space group . Keeping this in mind, our research group refined the structure with R3c space group initially to investigate the crystal system.…”

Section: Resultsmentioning

confidence: 99%

Nd³⁺ and Nb⁵⁺ Co‐Substitution Inducing a Large Electrocaloric Response in Na_0.5Bi_0.5TiO₃ Lead‐Free Ceramics

Kandula

Tirupathi

Asthana

2019

Physica Status Solidi (b)

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Nd3+ and Nb5+ co‐substituted (Na0.5Bi0.49Nd0.01)Ti1–xNbxO3 lead‐free ceramics are synthesized by conventional solid‐state reaction method. The X‐ray diffraction study revealed that NBNT‐Nb‐0 (x = 0.00) ceramics exhibit single phase monoclinic crystal with Cc phase while NBNT‐Nb‐1 (x = 0.00) ceramics exhibited a dual phase with Cc+P4mm coexistence of monoclinic and tetragonal systems. The temperature‐dependence dielectric study revealed the existence of ferroelectric and antiferroelectric transformations in two independent regions. Further temperature‐dependent strain vs. electric field measurements strengthen the ferroelectric to antiferroelectric transformation in the present ceramics. The induced electrocaloric effect (ECE) response showed that a significant change in temperature (ΔT) is obtained at 50 kV cm−1 fields: about 0.69 K for NBNT‐Nb‐0 and 0.81 K for NBNT‐Nb‐1 ceramics, respectively. The maximum isothermal entropy change (ΔS) is found to be 0.95 and 1.02 Jkg−1 K−1 for NBNT‐Nb‐0 and NBNT‐Nb‐1 ceramics obtained at 50 kV cm−1, respectively. The simultaneous presence of ECE response and isothermal change in entropy (ΔS) is an open window for great potential applications in the field of electronic devices.

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“…However, the giant ECE have been observed for lead-based material which is again hazardous and carcinogenic. In order to overcome this problem lead-free material like (Na 0.5 Ba 0.5 )TiO 3 18 , 19 , BaTiO 3 20 – 23 , (K 0.5 Na 0.5 )NbO 3 9 , 13 , 24 , Ba 0.65 Sr 0.35 TiO 3 25 , 26 ferroelectric-based compounds are the better candidates. There had been a various report on the mentioned materials, but achieved EC temperature change (Δ T ) is very less.…”

Section: Introductionmentioning

confidence: 99%

Giant electrocaloric and energy storage performance of [(K0.5Na0.5)NbO3](1−x)-[LiSbO3] x nanocrystalline ceramics

Kumar

Singh

2018

Sci Rep

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Electrocaloric (EC) refrigeration, an EC effect based technology has been accepted as an auspicious way in the development of next generation refrigeration due to high efficiency and compact size. Here, we report the results of our experimental investigations on electrocaloric response and electrical energy storage properties in lead-free nanocrystalline (1 − x)K0.5Na0.5NbO3-xLiSbO3 (KNN-xLS) ceramics in the range of 0.015 ≤ x ≤ 0.06 by the indirect EC measurements. Doping of LiSbO3 has lowered both the transitions (TC and TO–T) of KNN to the room temperature side effectively. A maximal value of EC temperature change, ΔT = 3.33 K was obtained for the composition with x = 0.03 at 345 K under an external electric field of 40 kV/cm. The higher value of EC responsivity, ζ = 8.32 × 10−7 K.m/V is found with COP of 8.14 and recoverable energy storage of 0.128 J/cm3 with 46% efficiency for the composition of x = 0.03. Our investigations show that this material is a very promising candidate for electrocaloric refrigeration and energy storage near room temperature.

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Electrocaloric effect and energy storage in lead free Gd 0.02 Na 0.5 Bi 0.48 TiO 3 ceramic

Cited by 54 publications

References 68 publications

Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi_0.5Na_0.5TiO₃‐Based Lead‐Free Ceramics

Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi_0.5Na_0.5TiO₃‐Based Lead‐Free Ceramics

Nd³⁺ and Nb⁵⁺ Co‐Substitution Inducing a Large Electrocaloric Response in Na_0.5Bi_0.5TiO₃ Lead‐Free Ceramics

Giant electrocaloric and energy storage performance of [(K0.5Na0.5)NbO3](1−x)-[LiSbO3] x nanocrystalline ceramics

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Electrocaloric effect and energy storage in lead free Gd 0.02 Na 0.5 Bi 0.48 TiO 3 ceramic

Cited by 54 publications

References 68 publications

Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi0.5Na0.5TiO3‐Based Lead‐Free Ceramics

Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi0.5Na0.5TiO3‐Based Lead‐Free Ceramics

Nd3+ and Nb5+ Co‐Substitution Inducing a Large Electrocaloric Response in Na0.5Bi0.5TiO3 Lead‐Free Ceramics

Giant electrocaloric and energy storage performance of [(K0.5Na0.5)NbO3](1−x)-[LiSbO3] x nanocrystalline ceramics

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Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi_0.5Na_0.5TiO₃‐Based Lead‐Free Ceramics

Enhanced Energy‐Storage Properties of Lanthanum‐Doped Bi_0.5Na_0.5TiO₃‐Based Lead‐Free Ceramics

Nd³⁺ and Nb⁵⁺ Co‐Substitution Inducing a Large Electrocaloric Response in Na_0.5Bi_0.5TiO₃ Lead‐Free Ceramics