Showing papers by "V. R. K. Murthy published in 2013"
TL;DR: In this article, composites of polyvinylidene fluoride (PVDF) with micron and nano sized BaTiO3 powders were developed for electromagnetic interference (EMI) shielding applications in the X band.
138 citations
TL;DR: In this article, the effects of substituting different cations (Mn, Zn, Mg and Co) at the A-site of AZrNb2O8 compounds on structural parameters such as packing fraction and B-site octahedral distortion were studied using X-ray powder diffraction in conjunction with Rietveld refinement.
117 citations
TL;DR: Li 2 Zn (1− x ) Ni x Ti 3 O 8 ( x ǫ= 0, 0.1, 0.4 and 1.0) microwave dielectric ceramics were studied with the help of powder X-ray diffraction and Raman spectroscopic measurements as discussed by the authors.
33 citations
TL;DR: The molecular interaction between the polar systems of propan-1-ol and propionaldehyde for various mole fractions at different temperatures were studied by determining the frequency dependent complex dielectric permittivity by using the open-ended coaxial probe technique method.
15 citations
TL;DR: In this article, the A 1g-like mode in Raman spectra was observed to possess Briet-Wigner-Fano line shape, which supported 1:1 B-site cation ordering and long range ordering (LRO) parameter decreased up to x ǫ = 0.5 and then increased with further increase in Sm concentration.
11 citations
TL;DR: In this article, the frequency dependent complex dielectric permittivity was determined by using the open-ended coaxial probe technique method in the microwave frequency range from 20 MHz to 20 GHz.
11 citations
TL;DR: A series of pure stoichiometric and 1-wt% lead borosilicate (PBS) glass added MgCuZn ferrite with the general formula Mg 0.5 Cu x Zn 0.4 with x ǫ = 0.
Abstract: A series of pure stoichiometric and 1 wt% lead borosilicate (PBS) glass added MgCuZn ferrite with the general formula Mg 0.5 Cu x Zn 0.5− x Fe 2 O 4 with x = 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3 were synthesized by microwave sintering technique. Single phase spinel structure is exhibited by the XRD patterns of these ferrites. DC and AC conductivity were investigated as a function of composition, temperature and frequency. DC conductivities were also estimated using the impedance spectroscopy analysis of Cole–Cole plots. The DC conductivities thus obtained are in good agreement with the experimental results. All the investigated samples exhibited two regions of conductivity one in the low temperature and the second in the high temperature region. It is observed that PBS glass added samples have lower conductivities than pure samples. Due to their lower conductivities and sintering temperatures the 1 wt% PBS glass added samples are suitable for multilayer chip inductor (MLCI) and high definition TV deflection yoke material application.
10 citations
TL;DR: In this paper, the molecular interactions between the polar systems N-methylaniline with alcohols, propan-1-ol, and isopropyl alcohol for various mole fractions at different temperatures are studied by determining the dielectric permittivity using LF impedance analyzer, microwave bench, and Abbe's refractometer in radio, microwave, and optic frequency regions, respectively.
Abstract: The molecular interactions between the polar systems N-methylaniline with alcohols, propan-1-ol, and isopropyl alcohol for various mole fractions at different temperatures are studied by determining the dielectric permittivity using LF impedance analyzer, microwave bench, and Abbe's refractometer in radio, microwave, and optic frequency regions, respectively. Dipole moment, excess dipole moment, excess Helmholtz free energy, excess permittivity, excess inverse relaxation time, and excess thermodynamical values are calculated using experimental data. Hamiltonian quantum mechanical calculations are performed using PC Spartan and ArgusLab modeling softwares for both pure and equimolar binary systems of N-methyl aniline with alcohols.
6 citations