Microwave Dielectric Relaxation in Binary Mixtures of Pyridine and 1-Propanol at Different Temperatures

Dielectric constant (ε′) and Dielectric loss (ε″) of the binary mixtures of the pyridine and 1-propanol have been measured at microwave frequencies of X-band and J-band at 303,313 and 323K temperatures. Static dielectric permittivity (ε0) of the liquid samples has been determined using precision LCR meter. Dielectric permittivity at optical frequency (ε∞) has also been measured. Determined values of Static dielectric permittivity (ε0) and complex permittivity (ε*) at 9.1 GHz frequency were used to evaluate relaxation time (τ). Determined parameters have been interpreted in terms of molecular interaction among the molecular species of the binary mixtures.

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Microwave dielectric properties of Ba4LaTi0.3Sn0.7Nb3O15 ceramic

International Journal of Modern Physics B ◽

10.1142/s0217979214500921 ◽

2014 ◽

Vol 28 (15) ◽

pp. 1450092 ◽

Cited By ~ 2

Author(s):

Abdul Manan ◽

Imtiaz Hussain

Keyword(s):

Dielectric Properties ◽

Single Phase ◽

Least Squares Method ◽

Microwave Dielectric Properties ◽

Network Analyzer ◽

X Ray Diffraction ◽

Microstructural Investigation ◽

Microwave Frequencies ◽

Microwave Dielectric ◽

Lcr Meter

Ba 4 LaTi 0.3 Sn 0.7 O 15 ceramic was prepared through conventional solid state mix oxide route followed by characterization using X-ray diffraction (XRD) and scanning electron microscope (SEM) for phase and microstructural investigation. The dielectric properties at low and microwave frequencies were measured using LCR meter and vector network analyzer. XRD results revealed single phase ceramics and the microstructure was comprised of compact grains with size ranging from 4–12 μm. The lattice parameters refined by the least squares method were a = b = 5.7680(2) Å, c = 11.7491(6) Å, V = 337.81 Å3 and Z = 1. Optimum properties i.e., εr~44.6, Qufo~15, 500 GHz and τf~2.05 ppm /° C were achieved for Ba 4 LaTi 0.3 Sn 0.7 Nb 3 O 15 ceramic sintered at 1475°C for 4 h.

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Optical Microscopy, X-Ray Diffraction, and Dielectric Permittivity Studies in Binary Mixtures of Nematogens Showing Induced Smectic Phase

Physics Research International ◽

10.1155/2011/786849 ◽

2011 ◽

Vol 2011 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Suchismita Datta Sarkar ◽

Basana Choudhury

Keyword(s):

Dielectric Permittivity ◽

Optical Microscopy ◽

Binary Mixtures ◽

Phase Region ◽

Smectic Phase ◽

Dielectric Anisotropy ◽

X Ray Diffraction ◽

Layer Spacing ◽

X Ray ◽

Static Dielectric Permittivity

The binary mixtures of nematogenic compounds 4-n-pentyl phenyl 4-n′-hexyloxy benzoate (ME6O.5) and 4-cyanophenyl 4-heptyl benzoate (CPHB) show the presence of induced smectic phase. In the present paper we report the phase diagram of the binary system (ME6O.5+CPHB) obtained by polarizing optical microscopy as well as the results of X-ray diffraction and static dielectric permittivity measurements on the system throughout the entire composition range. The observed variation of dielectric anisotropy with molar concentration in the induced smectic phase region is explained by assuming molecular associations in the mixture which is supported by our measurements of layer spacing in the induced smectic phase by X-ray diffraction studies.

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Dielectric permittivity, density, viscosity and refractive index of binary mixtures of anisole with methanol and 1-propanol at different temperatures

Journal of Molecular Liquids ◽

10.1016/j.molliq.2011.09.009 ◽

2011 ◽

Vol 164 (3) ◽

pp. 191-196 ◽

Cited By ~ 27

Author(s):

V.A. Rana ◽

Hemant Chaube ◽

D.H. Gadani

Keyword(s):

Refractive Index ◽

Dielectric Permittivity ◽

Binary Mixtures ◽

Different Temperatures

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A Study of Molecular Interaction in Binary Mixtures of 1-Propanol with N,N-Dimethylformamide at Different Temperatures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.665.317 ◽

2013 ◽

Vol 665 ◽

pp. 317-325 ◽

Cited By ~ 1

Author(s):

A.N. Prajapati ◽

Vipinchandra A. Rana ◽

A.D. Vyas ◽

Deepak H. Gadani

Keyword(s):

Dielectric Constant ◽

Binary Mixtures ◽

Molecular Species ◽

Molecular Interaction ◽

Optical Dielectric Constant ◽

Different Temperatures ◽

Optical Dielectric ◽

Correlation Parameters ◽

Lcr Meter ◽

Bruggeman Parameter

The static dielectric constant (ε0) and optical dielectric constant (ε = n2) of binary mixtures of 1-Propanol (1-PrOH) with N,N-Dimethylformamide (DMF) of different concentrations, prepared by volume fractions (0.0, 0.1, . 1.0) are measured at 2 MHz using precision LCR meter and Abbes refractometer respectively at different temperatures. The excess dielectric constant (ε0)E, Kirkwood correlation parameters (geff, gF), Bruggeman parameter (fB) are evaluated. The variations of these parameters with concentration and temperature are discussed in terms of molecular interaction between the molecular species of constituting components in these mixtures.

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