Phase transformation, nanorod-like morphology, wide bandgap, and dielectric properties of 1 − x (Al0.2La0.8TiO3) +  x (BaTiO3) (x = 0.2–0.8) nanocomposites

Banerjee

et al. 2021

J Mater Sci: Mater Med

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In this review work, we highlight the origin of morphological structures such as nanofibers/nanorods in case of various materials in nano as well as bulk form. In addition, a discussion on different cations of different ionic radii and other intrinsic factors is provided. The materials (ceramic titanates, ferrites, hexaferrites, oxides, organic/inorganic composites, etc.,) exhibiting the nanofibers/nanorods like morphological structures are tabulated. Furthermore, the significance of nanofibers/nanorods obtained from distinct materials is elucidated in multiple scientific and technological fields. At the end, the device applications of these morphological species are also described in the current technology.

Section: Hydrothermal Techniquesupporting

confidence: 65%

A review on the origin of nanofibers/nanorods structures and applications

Naidu

Banerjee

et al. 2021

J Mater Sci: Mater Med

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Effect of pH on Structure, Optical, and Dielectric Properties of BaTiO₃ Nanoparticles

Kumari

Devi

2023

Cryst. Res. Technol.

Barium titanate (BTA) nanoparticles are prepared by low‐temperature hydrothermal technique with varying pH from 9 to 12. The X‐ray diffraction (XRD) patterns confirm that the BTA nanoparticles with pH ranging from 9 to 11 show the existence of few small secondary phases (*) related to tetragonal structure along with the prominent cubic phases. But for sample with pH = 12, the XRD patterns confirm the presence of cubic phases without secondary phases. The morphology evidences the existence of almost spherical‐shaped grains (field‐emission scanning electron microscopy), and nanoparticles (high‐resolution transmission electron microscopy) in case of all samples. The energy dispersive spectra confirm the presence of Ba, Ti, and O elements among all samples. Besides, the photocatalytic activity is noticed for all samples. Using the Tauc's plots, optical band gap is determined. The dielectric constant (at pH = 12) is ≈15.10 while the dielectric loss is ≈1.231 suggesting the sample is suitable for charge stored capacitor applications. The dielectric modulus and impedance spectra are recorded in order to evaluate the polarization and conduction mechanism.

Structure, morphology, dielectric, and impedance properties of (1-x) (Al0.2La0.8TiO3) + (x) (CuTiO3) (x = 0.2–0.8) nanocomposites

Reddy

J Mater Sci: Mater Electron

Babu

et al. 2021

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1-x) (Al 0.2 La 0.8 TiO 3 ) ? (x) (CuTiO 3 ) (x = 0.2-0.8) [ALTCT] nanocomposites were prepared through hydrothermal process. The diffraction study indicated the formation of tetragonal structure expressing maximum intense peak at * 25.586 o for all samples. Lattice constants a = b and c values were found to be increasing from 3.774 to 3.780 A ˚, and 9.394-9.950 A ˚, respectively as a function of 'x'. The surface morphology showed that the formation of nanospheres, and hexagonal nanorods. Further, the dielectric behavior was studied, and the results showed space charge effect, dielectric relaxation dynamics, and frequency-dependent dielectric properties. Impedance and dielectric modulus formalism was carried out to elucidate the microstructure, polarization, and electrical conduction mechanism.