Synthesis and characterizations of BNT–BT–KNN ceramics for energy storage applications

Chandrasekhar, M.; Kumar, P.

doi:10.1080/01411594.2015.1118763

Cited by 25 publications

(5 citation statements)

References 39 publications

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“…XRD and microstructure study Fig. 1(a) shows the XRD patterns of samples, which confirmed the retention of single perovskite phase [13,14] nature except x¼ 0.04 samples. Secondary phase in x ¼0.04 sample is caused by reaction between sodium, titanium and oxygen ions (JCPDS no: 31-1329, 80-1282).…”

Section: Resultssupporting

confidence: 68%

Synthesis and characterizations of NaNbO3 modified BNT–BT–BKT ceramics for energy storage applications

Chandrasekhar

Sonia

Kumar

2016

Physica B: Condensed Matter

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Section: Resultssupporting

confidence: 68%

Synthesis and characterizations of NaNbO3 modified BNT–BT–BKT ceramics for energy storage applications

Chandrasekhar

Sonia

Kumar

2016

Physica B: Condensed Matter

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“…The composition 5KNN which has low piezoresponse value of 23 pC/N shows the highest energy density of 1.19 J/cm 3 and a discharge efficiency of 60% at a field of 70 kV/cm. Gao et al and Chandrasekhar et al had reported energy storage densities of 0.59 J/cm 3 and 0.5 J/cm 3 for the composition 5KNN at an electric field of 60 kV/cm [43,44]. The higher energy storage density obtained by us as compared to prior reported values could be due to the higher dielectric breakdown strength of our sample achieved through densification by MnO 2 doping.…”

Section: Discussionsupporting

confidence: 41%

“…The permittivity vs temperature plots of 0KNN and 5KNN have two shoulder in both unpoled and poled states. The shoulder at lower temperature observed at around 150 °C is attributed to ferroelectric to antiferroelectric phase transition and the shoulder at higher temperature of about 300 °C is assigned to antiferroelectric to paraelectric phase transition [43,44]. The shoulder at around 150 °C is frequency dependent which is a characteristic of relaxor ferroelectrics [27,59].…”

Section: Dielectric Properties and Relaxor Behaviormentioning

confidence: 94%

Microstructural, structural, dielectric, piezoelectric and energy storage properties of 0.2 wt% MnO2 doped (0.94-x)Na0.5Bi0.5TiO3–0.06BaTiO3-xK0.5Na0.5NbO3 ceramics (0 ≤ x ≤ 0.08)

et al. 2020

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Lead free (0.94-x)Na 0.5 Bi 0.5 TiO 3-0.06BaTiO 3-xK 0.5 Na 0.5 NbO 3 ceramics are under the spotlight owing to their multifunctional nature. We have systematically investigated the microstructural, structural, dielectric, piezoelectric and energy storage properties of the system in the range 0 ≤ x ≤ 0.08. There is a systematic reduction in grain size with increasing K 0.5 Na 0.5 NbO 3 (KNN) concentration. The enhancement in disorder with K 0.5 Na 0.5 NbO 3 (KNN) doping is evident from the increase in slope of the dielectric dispersion plots. The unpoled compositions have a cubic like structure in the whole range i.e. from x = 0 to x = 0.08. However, the application of electric field(poling) results in a structural transformation to lower symmetry upto x = 0.04. Beyond that the disorder dominates over the applied electric field and the structure is cubic like even in the poled state. The energy storage density increases from 0.08 J/cm 3 for x = 0 to 1.19 J/cm 3 for x = 0.05 and saturates thereafter. Discharge efficiency also follows a similar trend. The piezoresponse decreases with KNN doping from 151 pC/N for x = 0 to 4 pC/N for x = 0.08. It is observed that energy storage density and piezoresponse are complimentary properties which increase at the expense of each other.

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“…Figure 4 shows the RT frequency dependence of ε r and tan δ of the sintered BT-CCTO ceramics and RT values of ε r and tan δ at 1 kHz are given in Table 2. Dielectric constant (ε r ) decreases with an increase of frequency for all the ceramic samples attributed to the decrease in net polarization of the ceramics [22]. Dielectric loss (tan δ) is high at low frequency and generally decreases with the increase of frequency for all the ceramic samples except for the pure CCTO (x = 1), where tan δ is low at a lower frequency and increases with an increase of frequency.…”

Section: Structurementioning

confidence: 89%

Structural, microstructural, dielectric and ferroelectric properties of BaTiO3-based ceramics

Rekha

Chandrasekhar

Kumar

2019

PAC

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(1-x)BaTiO 3-xCaCu 3 Ti 4 O 12 ceramic powders (where x = 0, 0.02, 0.04, 0.06, 0.08 and 1) were synthesized by solid state reaction method and sintered at up to 1250°C. Phase formation, elemental composition and microstructure of all the samples were investigated by XRD, EDX and FESEM, respectively. The BT-CCTO ceramic samples corresponding to x = 0.04 content showed the best dielectric properties. The improvement of dielectric properties was attributed to the presence of oxygen vacancies. Ferroelectricity was retained for CCTO content up to x = 0.06.

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Synthesis and characterizations of BNT–BT–KNN ceramics for energy storage applications

Cited by 25 publications

References 39 publications

Synthesis and characterizations of NaNbO3 modified BNT–BT–BKT ceramics for energy storage applications

Synthesis and characterizations of NaNbO3 modified BNT–BT–BKT ceramics for energy storage applications

Microstructural, structural, dielectric, piezoelectric and energy storage properties of 0.2 wt% MnO2 doped (0.94-x)Na0.5Bi0.5TiO3–0.06BaTiO3-xK0.5Na0.5NbO3 ceramics (0 ≤ x ≤ 0.08)

Structural, microstructural, dielectric and ferroelectric properties of BaTiO3-based ceramics

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