Structural, ferroelectric and piezoelectric properties of chemically processed, low temperature sintered piezoelectric BZT–BCT ceramics

Roy, Subir; Maharana, Rajalaxmi; Reddy, Seelam Rangaswamy; Singh, Sarabjit; Kumar, P.; Karthik, T.; Asthana, Saket; Prasad, V.V. Bhanu; Kamat, S.V.

doi:10.1088/2053-1591/3/3/035702

Cited by 13 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By combining Raman and dielectric analysis, the former anomaly is attributed to rhombohedral (ferroelectric) to tetragonal (ferroelectric) phase transformation (T R-T = 40 0 C), while the latter is assigned to tetragonal (ferroelectric) to pseudocubic (paraelectric) phases (T T-C ). The values of T R-T and T T-C are in good agreement with the ones reported in the literature [39]. Moreover, as seen in Fig.…”

Section: Dielectric Propertiessupporting

confidence: 91%

“…This could contribute to a maximum in domain wall activity and causes an enhancement in the electric permittivity [38]. Furthermore, maximum dielectric constant in x = 0.6 also correlated to the low frequency vibrational mode of Ba-O bond [39][40].…”

Section: Temperature Dependencementioning

confidence: 91%

“…8 gives the values of from which, the obtained δ values are 14 0 C, 16 0 C, 24 0 C for x = 0. [39,44]. Also, the increase in grain boundary due to a decrease in grain size as evidenced from SEM causes the internal stress and further promote the diffusiveness [20].…”

Section: Dielectric Propertiesmentioning

confidence: 98%

See 2 more Smart Citations

Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications

Jayakrishnan

Alex

Thomas

et al. 2019

Ceramics International

View full text Add to dashboard Cite

show abstract

Section: Dielectric Propertiessupporting

confidence: 91%

Section: Temperature Dependencementioning

confidence: 91%

See 1 more Smart Citation

Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications

Jayakrishnan

Alex

Thomas

et al. 2019

Ceramics International

View full text Add to dashboard Cite

show abstract

“…The characteristic tetragonal reflection (110) was observed at 2θ = 31.65°. BCZT powder has a tetragonal symmetry demonstrated by the peaks (002) and (200) splitting [37][38][39][40]. Insets of Fig.…”

Section: Morphology and Phase Characterization Of Rodlike Bczt Powdermentioning

confidence: 99%

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

Hanani¹,

Merselmiz²,

Danine³

et al. 2020

J Adv Ceram

View full text Add to dashboard Cite

Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 (BCZT) lead-free ceramics demonstrated excellent dielectric, ferroelectric, and piezoelectric properties at the morphotropic phase boundary (MPB). So far, to study the effect of morphological changes on dielectric and ferroelectric properties in lead-free BCZT ceramics, researchers have mostly focused on the influence of spherical grain shape change. In this study, BCZT ceramics with rod-like grains and aspect ratio of about 10 were synthesized by surfactant-assisted solvothermal route. X-ray diffraction (XRD) and selected area electron diffraction (SAED) performed at room temperature confirm the crystallization of pure perovskite with tetragonal symmetry. Scanning electron microscopy (SEM) image showed that BCZT ceramics have kept the 1D rod-like grains with an average aspect ratio of about 4. Rod-like BCZT ceramics exhibit enhanced dielectric ferroelectric (ε r = 11,906, tanδ = 0.014, P r = 6.01 µC/cm², and E c = 2.46 kV/cm), and electrocaloric properties (ΔT = 0.492 K and  = 0.289 (Kmm)/kV at 17 kV/cm) with respect to spherical BCZT ceramics. Therefore, rod-like BCZT lead-free ceramics have good potential to be used in solid-state refrigeration technology. Keywords: lead-free Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 (BCZT); rod-like Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 (BCZT); dielectric; ferroelectric; electrocaloric effect

show abstract

“…The measured piezoelectric coefficients for the (1 – x )BZT5–( x )BCT8 samples provide an important insight into the effect of composition variation on the piezoelectric properties. This information can be crucial for researchers and engineers seeking to tailor materials with specific piezoelectric characteristics for diverse applications in areas such as robotics, energy harvesting, and medical devices. − …”

Section: Resultsmentioning

confidence: 99%

Chemical-Composition Tuning-Enabled Optimization of Structure, Properties, and Performance of Lead-Free (1 – x)BaZr_0.05Ti_0.95O₃–(x)Ba_0.92Ca_0.08TiO₃ Electroceramics

Gaikwad,

Kharat,

Baraskar

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

Barium titanate (BaTiO 3 ) and its derivatives, which belong to the family of perovskite oxides, offer a class of lead (Pb)free ferroelectric and piezoelectric materials with numerous applications in electronic and electromagnetic devices. In this study, we report on the Pb-free materials with a variable composition (1 − x)BZT5−(x)BCT8 (x = 0.00−1.00) where BZT5 refers to BaZr 0.05 Ti 0.95 O 3 and BCT8 refers to Ba 0.92 Ca 0.08 TiO 3 . The substitution of Zr 4+ for Ti 4+ and Ca 2+ for Ba 2+ in the BaTiO 3 matrix enhances the properties and performance desirable for applications involving ferroelectric capacitors and memory storage devices. X-ray diffraction (XRD) studies coupled with Rietveld refinement analyses confirm the biphasic (major tetragonal and minor orthorhombic) crystal structure of all the samples. Raman spectroscopic studies corroborate with XRD results and validate the biphasic crystal structure. Chemically homogeneous samples exhibit the characteristic granular-dense microstructure. The density measurements using Archimedes' principle indicate that the sample density is above 5.31 g/cm 3 (90%). Ferroelectric measurements display typical polarization-electric field (P−E) hysteresis, confirming the ferroelectric nature and electric field-induced strain butterfly (S−E) loops, confirming the piezoelectric nature of all the samples. The dielectric properties of all of the compositions indicate significant prospects for future capacitor applications. Ferroelectric measurements show that BZT5 exhibits a maximum value of 0.70 squareness ratio, indicating that BZT5 can be a suitable material for permanent ferroelectric random-access memory (Fe-RAM) applications, whereas 0.75BZT5−0.25BCT8 is suitable for switching applications. The moderately higher remnant polarization (P r = 11.22 μC/cm 2 ) and the lower coercive field (E c = 2.54 kV/cm) are obtained for BCT8. The piezoelectric coefficient and strain studies show that sample with x = 0.50 exhibits a higher converse piezoelectric coefficient of 430 ± 1 pm/V and 0.179 (% strain). The Q-factor for the BZT5 composition was observed to be 4.13 × 10 −4 (cm 2 /μC) 2 , which is the maximum among the studied compositions, suggesting that BZT5 may be a suitable candidate for energy conversion transducer applications.

show abstract

Structural, ferroelectric and piezoelectric properties of chemically processed, low temperature sintered piezoelectric BZT–BCT ceramics

Cited by 13 publications

References 26 publications

Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications

Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

Chemical-Composition Tuning-Enabled Optimization of Structure, Properties, and Performance of Lead-Free (1 – x)BaZr_0.05Ti_0.95O₃–(x)Ba_0.92Ca_0.08TiO₃ Electroceramics

Contact Info

Product

Resources

About

Structural, ferroelectric and piezoelectric properties of chemically processed, low temperature sintered piezoelectric BZT–BCT ceramics

Cited by 13 publications

References 26 publications

Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications

Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

Chemical-Composition Tuning-Enabled Optimization of Structure, Properties, and Performance of Lead-Free (1 – x)BaZr0.05Ti0.95O3–(x)Ba0.92Ca0.08TiO3 Electroceramics

Contact Info

Product

Resources

About

Chemical-Composition Tuning-Enabled Optimization of Structure, Properties, and Performance of Lead-Free (1 – x)BaZr_0.05Ti_0.95O₃–(x)Ba_0.92Ca_0.08TiO₃ Electroceramics