Order-disorder correlation on local structure and photo-electrical properties of La3+ ion modified BZT ceramics

Ghosh, Sarit K.; Ganguly, M.; Rout, S. K.; Sinha, T. P.

doi:10.1140/epjp/i2015-15068-6

Cited by 37 publications

(17 citation statements)

References 58 publications

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“…Similar results were previously discussed 22 . In addition, the maximum degree of poling retains upon applied field removal and it depends on the different BZT/BCT compositions discussed previously by researchers 7,18,43,55,56 …”

Section: Resultssupporting

confidence: 86%

“…The uneven distribution of both Zr 4+ and Ti 4+ generally results in strain upon the grains 42 . Due to the existence of dissimilar sizes of the grains, these quasi‐phonon modes are mixing together with a long‐range electrostatic force and thus accountable for the broadening of peaks in Raman spectra 43 . It is also believed that the strain in the system leads to the shift in mode frequency and could be the reason behind the Raman shift of A1 modes toward lower frequencies.…”

Section: Resultsmentioning

confidence: 99%

“…42 Due to the existence of dissimilar sizes of the grains, these quasi-phonon modes are mixing together with a long-range electrostatic force and thus accountable for the broadening of peaks in Raman spectra. 43 It is also believed that the strain in the system leads to the shift in mode frequency and could be the reason behind the Raman shift of A1 modes toward lower frequencies. Both Zr 4+ and Ti 4+ are ferroelectrically active and are off-centered in the octahedral site, which is responsible for the local disorder moment.…”

Section: Rietveld and Raman Analysismentioning

confidence: 99%

“…22 In addition, the maximum degree of poling retains upon applied field removal and it depends on the different BZT/BCT compositions discussed previously by researchers. 7,18,43,55,56 Figure 7A represents the direct piezoelectric constant (d 33 ) measured by using a quasi-static d 33 meter, the values of k p and Q m values as a function of BZT/BCT composition. The highest d 33 and k p values as 500 pC/N and 40%, respectively, were obtained for 5/5 BZT/BCT ceramics.…”

Section: Room Temperature Ferroelectric Propertiesmentioning

confidence: 99%

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Composition driven (Ba,Ca)(Zr,Ti)O₃ lead‐free ceramics with large quality factor and energy harvesting characteristics

et al. 2020

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Lead zirconate titanate (PZT) is the excessively used material for electromechanical device applications for decades. However, the toxic effects of absorption of metallic lead by the human body can cause lethal poisoning. 1 Consequently, European Union adopted various regulations. 2,3 As a response, in 2004 Saito et al 4 reported (K,Na)NbO 3 (KNN)-based lead-free piezoceramics with properties comparable to those found in PZT. Functional properties of BaTiO 3 (BT)-based ceramics were insufficient compared to PZT-based materials together with low

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Rietveld and Raman Analysismentioning

confidence: 99%

Section: Room Temperature Ferroelectric Propertiesmentioning

confidence: 99%

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Composition driven (Ba,Ca)(Zr,Ti)O₃ lead‐free ceramics with large quality factor and energy harvesting characteristics

et al. 2020

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“…4 shows the Raman spectra recorded at room conditions. Raman spectroscopy is considered to be a powerful tool for estimating the degree of structural order-disorder at short-range in oxide materials 35,36 .…”

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Structural, electronic, optical properties and first-principles calculations of Sr1-xCaxWO4 ceramics

Haddouch¹,

Tamraoui

Mirinioui

et al. 2019

Mediterr.J.Chem.,

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A series of strontium calcium tungstates Sr1-xCaxWO4 powders with (x = 0; 0.25; 0.5; 0.75 and 1.0) were prepared by solid-state reaction method and analyzed by X-ray diffraction (XRD). All these compositions possess a tetragonal scheelite structure with I41/a space group. Raman active vibrational modes in the range from 20 to 1000 cm-1 of the series Sr1-xCaxWO4 with tetragonal structure exhibit 13 modes in arrangement with the Group theory analysis of structural Raman-active modes. The optical properties were investigated using the diffuse reflectance UVâ€“visible absorbance spectrum. Based on Density Functional Theory (DFT) and using full Potential-linearized Augmented Plane Wave (FP-LAPW) method with the Local Density Approximation and the Generalized Gradient Approximation (GGA), implemented in the Wien2k package, we have investigated electronic and optical properties of all the compositions. The results indicate a decrease in the values of the optical direct bandgap (from 4.29 to 3.87 eV) with the increase of Ca into SrWO4 lattice, which is in good agreement with our experimental results.

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Study on the Modification of Polyvinylidene Fluoride Films with Barium Zirconate Titanate to Achieve Excellent Dielectric Property

Gao

Hou

2021

ChemistrySelect

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The barium zirconate titanate coated with dopamine is an excellent dielectric material. Herein, we prepared a type of BaLaZrTiO3 (BLZT) powder by hydrothermal method and coated BLZT with dopamine (DA). Then, casting method was applied to synthesize a composite film by adding BLZT/DA‐BLZT powders to polyvinylidene fluoride (PVDF) respectively. Results show that DA‐BLZT@PVDF films perform better than BLZT@PVDF films in term of energy storage property and dielectric property. The dielectric constant and energy storage density of DA‐BLZT@PVDF films were all higher than that of BLZT@PVDF films and the dielectric loss was lower than BLZT@PVDF films. X‐Ray Diffraction (XRD) demonstrated the typical perovskite structure was existing in BLZT powder. TEM and SEM also showed that the surface of BLZT powder was successfully coated with DA and uniformly dispersed in PVDF. This research provided an avenue to significantly improve the electrical properties of composite films.

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Order-disorder correlation on local structure and photo-electrical properties of La3+ ion modified BZT ceramics

Cited by 37 publications

References 58 publications

Composition driven (Ba,Ca)(Zr,Ti)O₃ lead‐free ceramics with large quality factor and energy harvesting characteristics

Composition driven (Ba,Ca)(Zr,Ti)O₃ lead‐free ceramics with large quality factor and energy harvesting characteristics

Structural, electronic, optical properties and first-principles calculations of Sr1-xCaxWO4 ceramics

Study on the Modification of Polyvinylidene Fluoride Films with Barium Zirconate Titanate to Achieve Excellent Dielectric Property

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Order-disorder correlation on local structure and photo-electrical properties of La3+ ion modified BZT ceramics

Cited by 37 publications

References 58 publications

Composition driven (Ba,Ca)(Zr,Ti)O3 lead‐free ceramics with large quality factor and energy harvesting characteristics

Composition driven (Ba,Ca)(Zr,Ti)O3 lead‐free ceramics with large quality factor and energy harvesting characteristics

Structural, electronic, optical properties and first-principles calculations of Sr1-xCaxWO4 ceramics

Study on the Modification of Polyvinylidene Fluoride Films with Barium Zirconate Titanate to Achieve Excellent Dielectric Property

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Product

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Composition driven (Ba,Ca)(Zr,Ti)O₃ lead‐free ceramics with large quality factor and energy harvesting characteristics

Composition driven (Ba,Ca)(Zr,Ti)O₃ lead‐free ceramics with large quality factor and energy harvesting characteristics