Diffuse phase transition behavior of dysprosium doped barium titanate ceramic

Badapanda, T.; Senthil, V.; Panigrahi, S.; Anwar, Shahid

doi:10.1007/s10832-013-9808-x

Cited by 47 publications

(14 citation statements)

References 27 publications

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“…It has been reported that the frequency of this mode changes in a series of complex perovskites as a function of the perovskite unit cell and with changes in the ionic radii [40]. The decrease in the intensity and broadening and shifting of the peaks at 306 cm −1 and 720 cm −1 towards higher wave numbers indicate a decrease in the "c/a" ratio (tetragonality) of the BZT system [41,42].…”

Section: Resultsmentioning

confidence: 97%

Influence of samarium and iron substitution on structural and electrical properties of barium zirconate titanate solid solutions

Kaur

Singh

2019

Journal of Asian Ceramic Societies

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Solid solutions of (x)SmFeO 3 -(1-x)Ba(Zr 0.05 Ti 0.95 )O 3 : x = 0, 0.21, 0.22 and 0.23 were synthesized by the solid-state reaction route. Le-Bail analysis of the X-ray diffraction data and Raman spectra revealed the presence of the tetragonal phase (P4mm space group 99). The remnant polarization (P r ) was~4.08 µC/cm 2 and 1.04 µC/cm 2 for x= 0 and x= 0.21, respectively, while lossy loops were observed for x≥ 0.22. Canting of the antiferromagnetic spins and ferromagnetic exchange mechanism was responsible for the ferromagnetic feature in the samples. An increase in remnant magnetization (M r ) was observed with increases in x. The Nyquist plots revealed the existence of grain and grain boundaries in the overall impedance. Separation of the normalized plots of impedance (Z˝) and modulus (M˝) spectra indicated localized motion of the charge carriers in the sample. The Maxwell-Wagner model fits very well in the lowfrequency region (10 5 Hz). The ac conductivity obeyed the Universal Jonscher's Power law. The variations in the exponent n suggest that the conduction mechanism conforms to the small polaron hopping mechanism.

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Section: Resultsmentioning

confidence: 97%

Influence of samarium and iron substitution on structural and electrical properties of barium zirconate titanate solid solutions

Kaur

Singh

2019

Journal of Asian Ceramic Societies

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“…The diminished behaviour in crystallinity and grain size is due to the addition of dysprosium ions which need more energy from solutions to form point defects of compensation. [35] The ionic radius of Dy (0.912 Å) is smaller than the bismuth ions (1.03 Å) so crystallite size, lattice parameter a, b decreases c increases and unit cell volume decreases, hence the (117) peak in XRD pattern shift towards higher 2θ. The mismatch of ionic radius between the Dy and Bi causes strain hence the concentration of dopant increases the microstrain increases so the FWHM increase hence the intensity of the peak and crystallinity decrease.…”

Section: Resultsmentioning

confidence: 99%

A‐Site Doped Aurivillius Layered Perovskite Thin Film (Bi_4‐xDy_xTi₃O₁₂) Electrode for Mercury Ions Sensor

Roselin

Rajendran

Panneerdoss³

et al. 2021

ChemistrySelect

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Heavy metals are highly polluting the environment and are considered a serious concern. As a result, early detection of these heavy metals is critical. In this research work, we focus on a new electrochemical sensor based on rare earth element (Dysprosium, Dy) modified with Aruvillius layered Perovskite (Bismuth titanate, Bi 4 Ti 3 O 12 , BTO) thin film electrodes with different concentrations of (0, 2 %, 4 %, 6 %) Dysprosium (Dy)was prepared using the sol-gel spin coating method for mercury (Hg 2 + ) ions detection.The X-ray diffraction analysis reveals the prepared sample exhibits a polycrystalline orthorhombic structure. The highest emission peak at 575 nm is discerned in the more visible region corresponding to the transition of 4F 9/2 !6H 3/2 . In the X-ray photoelectron spectro-scopy analysis, the existence of Bi, Ti, O, and Dy is demonstrating the successful formation of prepared material. In the electrochemical section, various parameters such as pH, scan rate, and different concentrations of (Hg 2 + ) ions were investigated. From the Cyclic Voltammetry and Electrochemical Impedance analysis, 4 % Dy doped BTO has been identified as an active electrochemical participant and has low charge transfer resistance. The stability analysis result shows the better stability of the electrode during the cycling for sensing application with a lower detection limit of 1.27 μM. It indicated that the modified 4 % Dy doped BTO thin film electrode can be explored for real-time analysis.

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“…To improve the stability of silicon anodes, BaTiO3 nanopowder is used here. That is due to the development of piezoelectric potential which enhances the movement of Li-ions and stabilizes the volume expansion of neighbouring silicon particles [31,32].…”

Section: Introductionmentioning

confidence: 99%

BaTiO₃‐doped silicon nanocomposite anodes capacity enhancement for ultra‐high capacity rechargeable lithium‐ion batteries

Amli

Walwyn

Ahmed

2021

The Journal of Engineering

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Silicon anodes are vital for the next generation ultra-high capacity rechargeable lithium-ion batteries. This study investigates ultrasmall silicon nanopowder (30-40 nm) as an anode material. Its high capacity > 3700 mAh/g makes it attractive, given the current theoretical capacity of graphite is ten times lower (370 mAh/g). However, it has severe instability due to volume expansion of silicon particles during charging. Hence, BaTiO 3 nanomaterial was used to stabilise the cycling ability and improve the capacity. This study showed that silicon anode with BaTiO 3 retained 40% of its original capacity after the 100th cycle where the silicon anode without BaTiO 3 lost almost all of its capacity. The silicon anode with BaTiO 3 also managed to regain and sustain ∼800 mAh/g of its capacity at slow charging rate compared to the silicon anode without BaTiO 3 . Water was used as a solvent and the basic changes in oxidation states of the silicon anode were investigated using X-ray photoemission spectroscopy and proved the creation of CO x at different rates of repeated cycling. The work also provides detailed mapping of the different stages as the silicon nanopowder undergoes cycling. It provides a simple and effective way of synthesising and testing nearly pure silicon anodes.

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Diffuse phase transition behavior of dysprosium doped barium titanate ceramic

Cited by 47 publications

References 27 publications

Influence of samarium and iron substitution on structural and electrical properties of barium zirconate titanate solid solutions

Influence of samarium and iron substitution on structural and electrical properties of barium zirconate titanate solid solutions

A‐Site Doped Aurivillius Layered Perovskite Thin Film (Bi_4‐xDy_xTi₃O₁₂) Electrode for Mercury Ions Sensor

BaTiO₃‐doped silicon nanocomposite anodes capacity enhancement for ultra‐high capacity rechargeable lithium‐ion batteries

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Diffuse phase transition behavior of dysprosium doped barium titanate ceramic

Cited by 47 publications

References 27 publications

Influence of samarium and iron substitution on structural and electrical properties of barium zirconate titanate solid solutions

Influence of samarium and iron substitution on structural and electrical properties of barium zirconate titanate solid solutions

A‐Site Doped Aurivillius Layered Perovskite Thin Film (Bi4‐xDyxTi3O12) Electrode for Mercury Ions Sensor

BaTiO3‐doped silicon nanocomposite anodes capacity enhancement for ultra‐high capacity rechargeable lithium‐ion batteries

Contact Info

Product

Resources

About

A‐Site Doped Aurivillius Layered Perovskite Thin Film (Bi_4‐xDy_xTi₃O₁₂) Electrode for Mercury Ions Sensor

BaTiO₃‐doped silicon nanocomposite anodes capacity enhancement for ultra‐high capacity rechargeable lithium‐ion batteries