Structure, dielectric, ferroelectric, and energy density properties of (1 − x)BZT–xBCT ceramic capacitors for energy storage applications

Puli, Venkata Sreenivas; Pradhan, Dhiren K.; Chrisey, Douglas B.; Tomozawa, M.; Sharma, Gyaneshwar; Scott, J. F.; Katiyar, Ram S.

doi:10.1007/s10853-012-6990-1

Cited by 189 publications

(84 citation statements)

References 31 publications

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“…Similarly, the dielectric losses (tan δ ) as a function of temperature under varying frequency for x =0, 0.05, 0.075, 0.10, and 0.15 are shown in Figure a–e, respectively. The frequency‐ and temperature‐dependent variation of ϵ and tan δ followed the general trend . Further, tan δ decreases as the frequency increases, and ϵ increases as the Sr content increases; this behavior is in complete agreement with that observed for the dielectric constant.…”

Section: Resultsmentioning

confidence: 99%

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Large‐Temperature‐Invariant and Electrocaloric Performance of Modified Barium Titanate for Solid‐State Refrigeration

2016

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Enormous advances have been made to enhance the electrocaloric responses of ferroelectric materials, and new advanced composites transcend the 50 K mark. However, such progress has ignored the need for temperature‐invariant performance, which is essential for continuous cooling. In this regard, we propose the use of Sr‐modified bulk ceramics with the nominal composition Ba0.85Ca0.15−xSrxTi0.9Zr0.1O3 (0

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Section: Resultsmentioning

confidence: 99%

“…Further, tan δ decreases as the frequency increases, and ϵ increases as the Sr content increases; this behavior is in complete agreement with that observed for the dielectric constant. However, a little frequency dispersion in the dielectric loss behavior is observed over a wide temperature interval near the Curie temperature …”

Section: Resultsmentioning

confidence: 99%

Large‐Temperature‐Invariant and Electrocaloric Performance of Modified Barium Titanate for Solid‐State Refrigeration

2016

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“…Further modification by doping BaTiO 3 ceramics into PVDF would further increase its dielectric constant to 35 while keeping the BDS of 164 MV m −1 . Ferroelectrics also attract significant attention due to their high dielectric constants (usually >1000) and stability at high temperatures …”

Section: Introductionmentioning

confidence: 99%

Enhanced Energy Storage using Ba(Zr_0.2Ti_0.8)O₃–0.15(Ba_0.7Ca_0.3)TiO₃ Ceramics with BaO–SrO–TiO₂–Al₂O₃–SiO₂–BaF₂ Glass Addition

Liu

Ping

2017

Energy Tech

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The addition of the glass BaO–SrO–TiO2–Al2O3–SiO2–BaF2 was employed to improve the microstructures and energy storage properties of Ba(Zr0.2Ti0.8)O3–0.15(Ba0.7Ca0.3)TiO3 ceramics, which exhibited a large dielectric constant of 3458 at 25 °C under 1 kHz, slim hysteresis loop with the maximum polarization of 12.53 μC cm−2, and a remnant polarization of 4.05 μC cm−2. Characterization of the microstructure indicated that the average grain size was reduced significantly with increasing glass concentration. Macroscopically the glass ceramics exhibited diffusion phase transition with reduced peak dielectric constant, but a broad peak with a relatively large dielectric constant of approximately 1000 near room temperature. Meanwhile the electrical breakdown strength (BDS) of the glass modified ceramics was nearly quadruple that of the pure ceramic. The energy storage performance of the glass‐modified ceramics (419.4 kJ m−3 calculated from the product of dielectric constant and square of BDS and 192.8 kJ m−3 from the integration of the hysteresis loop under an electric field of 9.6 kV mm−1) showed significant superiority to that of the pure ceramic material.

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“…[25][26][27] These exceptional material attributes have been credited to the existence of an orthorhombic phase.T his phase,w hich is intermediate to dominating rhombohedral and tetragonal phases,a llows for polarization rotation. [23,28] Togetherw ith extrinsic contributions peakinga round am orphotropic phase boundary (MPB) allowsabroad minimumi ns witchinge nergy barrier, resultingi na ugmented ferroelastic switching. [23,28] We have recently demonstrated that this exceptional strain response can be used to manifest al arge elastocaloric effect (eC) in BCZTO polycrystalline ceramics.…”

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confidence: 99%

“…[23,28] Togetherw ith extrinsic contributions peakinga round am orphotropic phase boundary (MPB) allowsabroad minimumi ns witchinge nergy barrier, resultingi na ugmented ferroelastic switching. [23,28] We have recently demonstrated that this exceptional strain response can be used to manifest al arge elastocaloric effect (eC) in BCZTO polycrystalline ceramics.[11] However, the present work aims to demonstrate variousc aloric effects in the BCZTO ceramics.A dditionally,t he peak DT was still obtained att emperatures significantly higher than room temperature. It was recently reported that co-doping of BCZTO with Fe 3 + and Nb 5 + disrupted the formation of this orthorhombic phase.…”

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Caloric Effects in Bulk Lead‐Free Ferroelectric Ceramics for Solid‐State Refrigeration

2015

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[a] Thec aloric behavior of bulk (Ba 0.865 Ca 0.135 Zr 0.1078 Ti 0.8722 Fe 0.01 Nb 0.01 )O 3 (BCZTO-FeNb) with respecttomultiplep hysical inputs is investigated. Predictions were made by using modified Maxwells relationsi nc onjunction with independent experimental data. BCZTO-FeNb possesses significant potential for multiple caloric effects.A peak electrocaloric effect of 0.5 K( 307 K) was predictedf or electric fields of 0-3 kV mm À1,s ignificantlyh igher than for other BCZTO-based compositions.Amaximum elastocaloric cooling of 1.17 K( 298 K) was achievedf or an applied stress of 0-200 MPa( 3kVmm À1). Finally,anew component of the electric-field-driven caloric effect is reported as the inverse piezocaloric effect, with am aximumt emperature changeo f 0.4 K( 298 K).Ferroelectric materials have recently acquiredg lobal attention owing to their emerging potential as solid-state refrigerants. [1][2][3][4][5] When ferroelectric materials are subjected to an external electricf ield in an adiabatic manner, at emperature changei si nduced. This effect is known as the electrocaloric effect (ECE) and has garneredt he attention of researchers worldwide.[2-4, 6-11] TheE CE is one of many caloric effects that are now being rigorously investigated with the aim of developingnew refrigeration technologies. [6,9,[12][13][14][15][16] These caloric effects have been proposed as ac redible solution to the growingd emand for cleaner, more efficient, ecofriendly,a nd miniaturized devices for space-cooling applications. [12,13,16] Thed evelopment of caloric-effect-based solid-state coolers will usher in an ew era of compact, mobile,a nd highly responsive refrigerators capable of onboard installation and powered by ambient or waste energy. [8,9,13,16,17] This will help mitigate the drawbacks associated with vapor-compression technology,w hich currently forms the backboneo ft he commercial refrigeration industry.ECE is amajor contender because it promises quiet operation, options for energy recovery,h igh efficiency,l ong lifespans,a nd cleaner operation. [12,13,16] However, the currenta pproach stillh as some limitations,t he major being selection of material shape or morphology. In this context, recently an umber of nanocomposite-and thin-film-based ferroelectrics have been studied for EC applications. [18][19][20][21] These are capable of aECE of ca. 30-50 K; however, the required electric field was very high (80-250kVmm À1 ;a lmost 20-80 times larger than that required for bulk ferroelectrics).[18-21] Furthermore,t hin films suffer from poor heat extractionc apacity owing to their reduced volume.[6, 10, 11] By contrast, bulk materials can provide feasible heat extraction but require high-intensity electric potentials for operation and suffer from limited (DT)v alues. [6,7,9,12,16] Theh ighest (DT)i so ften realizedn ear the ferro-para transition temperature, which limits their applicability to higher-than-room-temperature settings.[2, 6-8] Ap revious publicationp ostulated that one of the solutionst ot his problemi st od rive a...

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Structure, dielectric, ferroelectric, and energy density properties of (1 − x)BZT–xBCT ceramic capacitors for energy storage applications

Cited by 189 publications

References 31 publications

Large‐Temperature‐Invariant and Electrocaloric Performance of Modified Barium Titanate for Solid‐State Refrigeration

Large‐Temperature‐Invariant and Electrocaloric Performance of Modified Barium Titanate for Solid‐State Refrigeration

Enhanced Energy Storage using Ba(Zr_0.2Ti_0.8)O₃–0.15(Ba_0.7Ca_0.3)TiO₃ Ceramics with BaO–SrO–TiO₂–Al₂O₃–SiO₂–BaF₂ Glass Addition

Caloric Effects in Bulk Lead‐Free Ferroelectric Ceramics for Solid‐State Refrigeration

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Structure, dielectric, ferroelectric, and energy density properties of (1 − x)BZT–xBCT ceramic capacitors for energy storage applications

Cited by 189 publications

References 31 publications

Large‐Temperature‐Invariant and Electrocaloric Performance of Modified Barium Titanate for Solid‐State Refrigeration

Large‐Temperature‐Invariant and Electrocaloric Performance of Modified Barium Titanate for Solid‐State Refrigeration

Enhanced Energy Storage using Ba(Zr0.2Ti0.8)O3–0.15(Ba0.7Ca0.3)TiO3 Ceramics with BaO–SrO–TiO2–Al2O3–SiO2–BaF2 Glass Addition

Caloric Effects in Bulk Lead‐Free Ferroelectric Ceramics for Solid‐State Refrigeration

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Product

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Enhanced Energy Storage using Ba(Zr_0.2Ti_0.8)O₃–0.15(Ba_0.7Ca_0.3)TiO₃ Ceramics with BaO–SrO–TiO₂–Al₂O₃–SiO₂–BaF₂ Glass Addition