Preparation and dielectric properties of oxide added NaCl–KCl polycrystals

Priya, M.; Mahadevan, C.

doi:10.1016/j.physb.2007.08.009

Cited by 49 publications

(11 citation statements)

References 32 publications

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“…The increase in conductivity could be attributed to reduction in the space charge polarization at higher frequencies [23]. In the present study, dielectric constant varying proportionally with temperature is essentially due to the temperature variation of the polarizability [24]. The low dielectric loss at high frequency indicates that the as-grown crystal has good optical quality with lesser defects.…”

Section: Mechanical Studiessupporting

confidence: 48%

Growth and characterization of Hexakis(thiourea)nickel(II) nitrate crystals

Muthu

Meenakashisundaram

2012

Journal of Crystal Growth

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Section: Mechanical Studiessupporting

confidence: 48%

Growth and characterization of Hexakis(thiourea)nickel(II) nitrate crystals

Muthu

Meenakashisundaram

2012

Journal of Crystal Growth

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“…Capacitance C crys and dielectric loss factor tanδ measurements were carried out within an accuracy of ±2 % using an LCR meter (Agilent 4284A) by the parallel plate capacitor method along the direction normal to the large surface area of the crystal at various temperatures in the range of 40°C to 150°C at five different frequencies, viz. 100 Hz, 1 kHz, 10 kHz, 100 kHz and 1 MHz in a way similar to that followed by Mahadevan et al [7][8][9].…”

Section: Characterizationmentioning

confidence: 72%

Growth and physicochemical characterization of calcium cadmium thiocyanate CaCd(SCN)₄ single crystals

Latha

Mahadevan²

2018

Materials Science-Poland

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It is important to grow and characterize new bimetallic thiocyanate single crystals as they are expected to exhibit useful optical and electrical properties. In the present study, calcium cadmium thiocyanate CaCd(SCN) 4 single crystals were grown by slow evaporation of solvent and were characterized chemically, structurally, thermally, optically and electrically. X-ray diffraction analysis indicates that the grown crystal belongs to the tetragonal crystal system with lattice parameters: a = b = 12.2491(7) Å and c = 15.1012(5) Å. EDAX spectral analysis confirms the expected chemical composition. Thermogravimetric (TG/DTA) measurement implies good thermal stability. Optical (UV-Vis-NIR absorption spectral and SHG efficiency) measurements suggest good optical absorption in the UV and blue regions and the SHG efficiency of 6.13 (in urea unit). The dielectric measurements carried out in the temperature range of 40°C to 150°C at five different frequencies, viz. 100 Hz, 1 kHz, 10 kHz, 100 kHz and 1 MHz indicate a normal dielectric behavior.

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“…The air capacitance (C measured but only at 40 0 C since the temperature variation of C air was found to be negligible. As the crystal surface area touching the electrode was smaller than the plate (electrode) area of the cell, the dielectric constant of the crystal ( calculated using Mahadevans's formula [47,48] where C crys is the capacitance with crystal (including air), C is the capacitance of air and A air is the area of the electrode. The AC electrical conductivity (σ ac ) was calculated using the relation:…”

Section: Characterizations Madementioning

confidence: 99%

“…The air capacitance (C air ) was also C since the temperature variation of was found to be negligible. As the crystal surface area touching the electrode was smaller than the plate (electrode) the dielectric constant of the crystal (ε r ) was calculated using Mahadevans's formula [47,48] is the capacitance with crystal (including air), C air is the area of the electrode. alculated using the is the permittivity of free space and ω is the angular Figure 1 shows a photograph of the sample crystals grown in the present study.…”

Section: Characterizations Madementioning

confidence: 99%