Effect of sintering temperature on dielectric, piezoelectric and ferroelectric properties of BZT–BCT 50/50 ceramics

Mishra, Partha Narayan; Sonia, .; Kumar, P.

doi:10.1016/j.jallcom.2012.08.017

Cited by 119 publications

(41 citation statements)

References 38 publications

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“…From then on, many modified BaTiO 3 -based lead-free piezoelectric ceramics (e.g., (Ba 1-x Ca x )(Ti 0.95 Zr 0.05 )O 3 [15], Ba(Zr 0.2 Ti 0.8 )O 3 -x(Ba 0.7 Ca 0.3 )TiO 3 [16], Ba(Zr 0.15 Ti 0.85 )O 3 -x(Ba 0.8 Ca 0.2 ) TiO 3 [17], (Ba 0.93 Ca 0.07 )(Ti 0.95 Zr 0.05 )O 3 [18], Pr 2 O 3 [19], ZnO [20], MnO 2 [21], CeO 2 [22] and La [23] doped Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 , etc.) have been prepared and the effects of sintering methods [24], sintering temperature [25][26][27], dwell time during sintering [28], and poling conditions [29] on the piezoelectric properties of Ba 0.85-Ca 0.15 Ti 0.90 Zr 0.10 O 3 ceramics have been investigated. However, the correlation of grain size, phase transition and piezoelectric properties of Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 ceramics has not been systematically investigated.…”

Section: Introductionmentioning

confidence: 99%

Correlation of grain size, phase transition and piezoelectric properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

Sun

Zheng

Wan

et al. 2015

J Mater Sci: Mater Electron

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Pb-free ceramics Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 inspired by the excellent piezoelectricity of morphotropic phase boundary deriving from a tricritical point have been prepared by a solid state reaction route and the effects of grain size and room-temperature phases of the ceramics have been studied in detail. When sintering temperature rises from 1320 to 1560°C with controlling the dwell time for 2 h, the ceramic sintered at 1480°C possesses the optimum piezoelectricity. We choose 1360 and 1480°C as two distinctive sintering temperatures to further study the effect of dwell time on the electrical properties of the ceramics. The results show that the improved piezoelectric behavior (d 33 * 416 pC/N and k p * 55.8 %) is demonstrated for the Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 ceramic at an optimal sintering temperature of 1480°C and dwell time of 2 h, which is attributed to the largest grain size together with more noticeable rhombohedral-tetragonal phase transition near room-temperature.

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Section: Introductionmentioning

confidence: 99%

Correlation of grain size, phase transition and piezoelectric properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

Sun

Zheng

Wan

et al. 2015

J Mater Sci: Mater Electron

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“…This was corroborated by the findings of a relatively constant ferroelastic texture after high temperature poling treatment. 303,307 An opposite trend is expected for the T phase for all of the aforementioned features due to free energy and elasticity considerations, as well as a larger lattice distortion (Section 5.1.1). 328 This means that the applied electric field to promote switching in the T phase is the highest among all phases, as indicated by the high ( 33 ) (Figure 5.16) and ( Figure 5.24 (b)).…”

Section: 2)mentioning

confidence: 99%

“…306 Table 3.1 summarizes the different synthesis procedures found in the literature. Mishra et al 307 performed a synthesis study on BZT-0.50BCT. The weight loss during heating of the uncalcined powders ended at 1000 °C, as indicated by TGA.…”

Section: Processingmentioning

confidence: 99%

“…310 Increasing the sintering temperature from 1300 °C to 1400 °C improved the sharpness and intensity of X-ray diffraction (XRD) peaks, suggesting increased crystallinity and grain size. 307 It was revealed that a sintering temperature between 1480 °C to 1550 °C with dwell times between 2 h and 5 h is optimum for maximized piezoelectric properties. [310][311][312][313] Excessive sintering temperature resulted in secondary phases.…”

Section: Processingmentioning

confidence: 99%

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Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Acosta

2016

Springer Theses

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“…[23,24] BCZTO is largely reporteda salow-field actuator material owing to its large piezoelectric response and strain coefficients. [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.…”

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confidence: 99%

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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Effect of sintering temperature on dielectric, piezoelectric and ferroelectric properties of BZT–BCT 50/50 ceramics

Cited by 119 publications

References 38 publications

Correlation of grain size, phase transition and piezoelectric properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

Correlation of grain size, phase transition and piezoelectric properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

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

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