Dielectric Properties of Binary Mixtures of 1,2-Dichloroethane+Ethane-1,2-diol and 1,2-Dichloroethane+2-Methoxyethanol

1995 ◽  
Vol 48 (9) ◽  
pp. 1541 ◽  
Author(s):  
F Corradini ◽  
A Marchetti ◽  
C Preti ◽  
M Tagliazucchi ◽  
L Tassi
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Binary Mixtures ◽  
Composition Range ◽  
Narrow Range ◽  
Static Dielectric Constant ◽  
Dielectric Behaviour ◽  
Rich Region ◽  
Stable Adduct ◽  
Fitting Procedures

The dielectric behaviour of binary mixtures of 1,2-dichloroethane (DCE)/ethane-1,2-diol (ED) and DCE/2-methoxyethanol (ME) has been studied at 19 temperatures in the range from -10 to +80°C. The DCE/ED system is immiscible, except in a narrow range near the ED-rich region. The DCE/ME system, which is completely miscible, has been investigated over the whole composition range. Fitting procedures have been applied in order to check the suitability of empirical or semiempirical functions of the type є(T), є(XI) and є(T,XI). Furthermore, the excess static dielectric constant, єE, has been evaluated in order to investigate the possibility of the existence of complex entities. A DCE.2ME species appears to be the only stable adduct.

N,N-dimethylformamide + 1,2-dimethoxyethane binary mixtures. The static dielectric constant from 40 to 80.degree.C

1993 ◽  
Vol 38 (2) ◽  
pp. 204-206 ◽  
Author(s):  
Luigi Marcheselli ◽  
Giuseppe Pistoni ◽  
Mara Tagliazucchi ◽  
Lorenzo Tassi ◽  
Giuseppe Tosi
Keyword(s):  
Dielectric Constant ◽  
Binary Mixtures ◽  
Static Dielectric Constant

Thermodynamic and physical behaviour of some water + polyethyleneglycol mixtures. II. Dielectric properties

1979 ◽  
Vol 57 (6) ◽  
pp. 608-613 ◽  
Author(s):  
Gérard Douhéret ◽  
Maurice Morénas
Keyword(s):  
Dielectric Properties ◽  
Composition Range ◽  
Dipole Moments ◽  
Partial Molar Volumes ◽  
Correlation Factor ◽  
Dielectric Constants ◽  
Treatment Results ◽  
Rich Region ◽  
Physical Behaviour ◽  
Water Lattice

Dielectric constants of water + glycol (mono-, di-, tri-, and tetraethyleneglycol) mixtures have been measured at 298.15 K over the entire composition range. The mixtures involving monoethyleneglycol have also been studied at temperatures from 308.15 to 288.15 K. Calculated deviations from ideality are always positive and show one maximum. Related properties have been computed: polarizability volume and excess polarizability volume, correlation factor of mixtures, and dipole moments of both components using the Mecke–Reuter treatment. Results support conclusions previously deduced from excess and partial molar volumes; they suggest that the addition of glycol molecules gives rise to a slight enhancement of the water-lattice in the water-rich region, followed by a progressive destructuring; the ether functions do not seem to play a prominent role.

scholarly journals Dielectric properties of benzylamine in 1,2,6-hexanetriol mixture using time domain reflectometry technique

2016 ◽  
Vol 06 (04) ◽  
pp. 1650034
Author(s):  
M. B. Swami ◽  
P. G. Hudge ◽  
V. P. Pawar
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Binary Mixtures ◽  
Time Domain ◽  
Complex Permittivity ◽  
Intramolecular Interaction ◽  
Correlation Factor ◽  
Time Domain Reflectometry ◽  
Least Square ◽  
Kirkwood Correlation Factor

The dielectric properties of binary mixtures of benzylamine-1,2,6-hexantriol mixtures at different volume fractions of 1,2,6-hexanetriol have been measured using Time Domain Reflectometry (TDR) technique in the frequency range of 10 MHz to 30 GHz. Complex permittivity spectra were fitted using Havriliak–Negami equation. By using least square fit method the dielectric parameters such as static dielectric constant ([Formula: see text]), dielectric constant at high frequency ([Formula: see text]), relaxation time [Formula: see text] (ps) and relaxation distribution parameter ([Formula: see text]) were extracted from complex permittivity spectra at 25[Formula: see text]C. The intramolecular interaction of different molecules has been discussed using the Kirkwood correlation factor, Bruggeman factor. The Kirkwood correlation factor ([Formula: see text]) and effective Kirkwood correlation factor ([Formula: see text]) indicate the dipole ordering of the binary mixtures.

Dielectric relaxation and orientational ordering of water molecules in hexamethylenetetramine hexahydrate

1968 ◽  
Vol 46 (6) ◽  
pp. 1024-1027 ◽  
Author(s):  
D. W. Davidson
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Hydrogen Bonds ◽  
Dielectric Relaxation ◽  
Static Dielectric Constant ◽  
Water Molecules ◽  
Hydrogen Atoms ◽  
Orientational Ordering ◽  
Water Hydrogen

To account for the dielectric properties of hexamethylenetetramine hydrate, which include a static dielectric constant half that of ice, some modification is necessary of the partial orientational ordering of the water molecules proposed by Mak. It is suggested that water hydrogen atoms occupy fixed positions only in the hydrogen bonds with nitrogen.

Dielectric Studies of Binary Mixtures of 1-Propanol and Fluorobenzene

2013 ◽  
Vol 209 ◽  
pp. 203-206 ◽  
Author(s):  
Ashvin N. Prajapati ◽  
Vipinchandra A. Rana ◽  
A.D. Vyas ◽  
S.P. Bhatanagar ◽  
D.H. Gadani
Keyword(s):  
Dielectric Constant ◽  
Binary Mixtures ◽  
Complex Permittivity ◽  
High Frequency ◽  
Low Frequency ◽  
Microwave Frequency ◽  
Static Dielectric Constant ◽  
Frequency Range ◽  
Optical Dielectric Constant ◽  
Optical Dielectric

Complex permittivity spectra of 1-Propanol (1-PrOH), Fluorobenzene (FB) and their binary mixtures are obtained in radio and microwave frequency range using Vector network analyzer (VNA) operating in the frequency range 0.3 MHz to 3.0 GHz and standard microwave benches operated at 9.1 GHz and 19.61 GHz. Static dielectric constant (ε0) and high frequency limiting dielectric constant (ε∞1) for binary mixtures of 1-PrOH and FB are obtained by extrapolating the complex permittivity data towards low frequency side and high frequency side on complex plane plots. Optical dielectric constant (ε∞ = n2) for binary mixtures are measured using Abbe's refractometer. Excess static dielectric constant (ε0)E, Kirkwood correlation parameters (g, geff and gf) and Bruggeman factor (fB) are determined from the values of static dielectric constant (ε0) and optical dielectric constant (ε∞). These parameters have been discussed to explore the molecular interaction between the molecular species.

Effect of PbO evaporation on the composition and dielectric properties of PbO-MgO-Nb2O5 based dielectrics

1990 ◽  
Vol 5 (3) ◽  
pp. 629-639 ◽  
Author(s):  
H. C. Ling ◽  
A. M. Jackson ◽  
M. F. Yan ◽  
W. W. Rhodes
Keyword(s):  
Phase Diagram ◽  
Weight Loss ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Ternary System ◽  
Stoichiometric Composition ◽  
Processing Conditions ◽  
Sintering Process ◽  
Rich Region ◽  
Optimum Processing

We have studied the weight loss during sintering and the resulting phase constituents and dielectric properties of a series of compositions in the lead-rich region of the PbO:MgO:Nb2O5 phase diagram near the stoichiometric composition of Pb(Mg1/3Nb2/3)O3 (PMN). While a ternary system of PbTiO3–Pb(CO1/3Nb2/3)O3–PMN was used, only the PMN component was varied in composition. The observed weight loss was ascribed to PbO evaporation from the nonstoichiometric PMN component. It was found that the sintered PMN compositions at about 1000°C correspond to the stoichiometric composition with varying amounts of excess MgO. These sintered compositions can be calculated by taking the Nb ion as the controlling cation in forming the PMN unit cell, from which the excess MgO can be determined. The excess PbO in the starting compositions, above the amount needed to form the sintered compositions of Pb(Mg1/3Nb2/3)O3 plus excess MgO, serves as a densification aid during the sintering process. Subsequently, the excess PbO is lost through evaporation. The peak dielectric constant of these compositions varies between 12000 and 18500, with the highest value attained in the sintered composition corresponding to stoichiometric PMN plus 0.229 mole of excess MgO. The optimum processing conditions for this composition are also identified.

scholarly journals Steady nature of dielectric behaviour in Sm1.5Sr0.5NiO4 – CCTO composites

2019 ◽  
Vol 5 (4) ◽  
pp. 145-150
Author(s):  
Kevin Abraham ◽  
A. K. Thomas ◽  
Jini Thomas ◽  
K. V. Saban
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Solid State ◽  
Loss Factor ◽  
Dielectric Behaviour ◽  
Dielectric Studies ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Practical Applications

The composite materials of 0.5 Sm1.5Sr0.5NiO4, 0.5 CCTO and 0.75 Sm1.5Sr0.5NiO4, 0.25 CCTO mixtures were prepared through the conventional solid state reaction in an attempt to obtain good dielectric properties for practical applications. The structural properties were determined by powder X-ray diffraction and single phases were obtained for Sm1.5Sr0.5NiO4 and CaCu3Ti4O12 compounds. The dielectric studies analysed over a range of frequencies (100 KHz–10 MHz) and temperatures (30 to 200 °C) revealed a desired dielectric constant values with a low steady nature of dielectric loss factor. Through impedance spectroscopy, the attained dielectric behaviour was due to the highly insulating grain boundaries at lower frequencies and semiconducting grains at higher frequencies.

Study of Molecular Interaction in Binary Mixtures (1-Propanol + Acetophenone)

2016 ◽  
Vol 1141 ◽  
pp. 125-130 ◽  
Author(s):  
A.N. Prajapati
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Binary Mixtures ◽  
Molecular Interaction ◽  
Structural Information ◽  
Correlation Factor ◽  
Static Dielectric Constant ◽  
Entire Concentration Range ◽  
Binary Liquid ◽  
Factor G

Studies on Physico-chemical properties of binary liquid mixtures provide information on the nature of interactions between the constituent of the binaries. Literature provides extensive data on the static dielectric constant (ε0) and refractive index (n) of liquid compounds, but the combined study of all is quite scarce. In the present work static dielectric constant (ε0) and refractive index (n) have been experimentally determined for binary liquid mixture of 1-Propanol (PrOH) with Acetophenone (ACP) over the entire concentration range of mixture composition (0.0 →1.0) at constant temperature 303 K. Static dielectric constant (ε0) and refractive index (n) for the binary mixture have been measured using high precision LCR meter (0.2 MHz) and Abbe’s refractometer respectively. Excess of static dielectric constant (ε0)E and refractive index (n)E are determined and fitted with Redlich-Kister polynomial equation to derive the binary coefficients and standard deviations. For interaction and structural information various parameters namely, Kirkwood correlation factor (g), Kirkwood effective correlation factor (geff), Kirkwood angular correlation factor (gF) and Bruggeman parameter (fB) are determined for the binary mixtures. Variations of these parameters against the concentration of constituents are discussed in terms of molecular interaction between the constituent species.

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