Temperature dependent static dielectric constant and viscosity behaviour of glycerol–amide binary mixtures: Characterization of dominant complex structures in dielectric polarization and viscous flow processes

2010 ◽  
Vol 154 (2-3) ◽  
pp. 117-123 ◽  
Author(s):  
R.J. Sengwa ◽  
Vinita Khatri ◽  
Shobhna Choudhary ◽  
Sonu Sankhla
Keyword(s):  
Dielectric Constant ◽  
Viscous Flow ◽  
Binary Mixtures ◽  
Static Dielectric Constant ◽  
Complex Structures ◽  
Dielectric Polarization ◽  
Temperature Dependent ◽  
Dominant Complex ◽  
Flow Processes

scholarly journals Synthesis and Characterization of CaxSryBa1-x-yFe12-zLazO19 by Standard Ceramic Method

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Rohit K. Mahadule ◽  
Purushottam R. Arjunwadkar ◽  
Megha P. Mahabole
Keyword(s):  
Dielectric Constant ◽  
Ac Conductivity ◽  
Phenomenological Theory ◽  
Dielectric Polarization ◽  
Ceramic Method ◽  
Chemical Phase ◽  
Ferrite Structure ◽  
Magnetic Dilution ◽  
Chemical Phase Analysis

The polycrystalline compounds with chemical formula CaxSryBa1-x-yFe12-zLazO19 (CSBFLO) were synthesized via standard ceramic method. The chemical phase analysis was carried out by X-ray powder diffraction (XRD) method, which confirmed the formation of the magnetoplumbite phase belonging to ferrite structure. The frequency dependence of AC conductivity and dielectric constant was studied in the frequency range of 10 Hz to 2 MHz. The experimental results revealed that AC conductivity increases with increasing frequency, which is in agreement with Koop’s phenomenological theory. However, variation in dielectric constant required explanation in light of dielectric polarization. Magnetic characterization included studies of parameters such as Ms, Mr, Hc, and Tc, and results were explained via magnetic dilution and canting spin structure.

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

scholarly journals Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2766
Author(s):  
Pavel Kaspar ◽  
Dinara Sobola ◽  
Klára Částková ◽  
Alexandr Knápek ◽  
Daniel Burda ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Thermal Degradation ◽  
Polymer Material ◽  
Polyvinylidene Fluoride ◽  
Electrospun Fibers ◽  
Complex Structures ◽  
Crystalline Phases ◽  
Points Of View ◽  
The Relationship

Polyvinylidene fluoride (PVDF) is a modern polymer material used in a wide variety of ways. Thanks to its excellent resistance to chemical or thermal degradation and low reactivity, it finds use in biology, chemistry, and electronics as well. By enriching the polymer with an easily accessible and cheap variant of graphite, it is possible to affect the ratio of crystalline phases. A correlation between the ratios of crystalline phases and different properties, like dielectric constant as well as piezo- and triboelectric properties, has been found, but the relationship between them is highly complex. These changes have been observed by a number of methods from structural, chemical and electrical points of view. Results of these methods have been documented to create a basis for further research and experimentation on the usability of this combined material in more complex structures and devices.

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.

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.

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.

Prediction of Static Dielectric Constant (ε0) and Refractive Index (n) Using Various Models for Binary Mixtures (Acetophenone with N-Hexanol)

2016 ◽  
Vol 1141 ◽  
pp. 131-135
Author(s):  
A.N. Prajapati
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Binary Mixtures ◽  
Liquid Mixture ◽  
Polynomial Equation ◽  
Static Dielectric Constant ◽  
Mixing Models ◽  
Entire Concentration Range ◽  
Constituent Species ◽  
Lcr Meter

Static dielectric constant (ε0) and refractive index (n) have been experimentally determined for binary liquid mixture of n-Hexanol (HxOH) with Acetophenone (ACP) over the entire concentration range of mixture composition (0.0 →1.0) at constant temperature 303.15 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. Deviations of these parameters are discussed in terms of terms of molecular interaction between the constituent species. In the present work, comparative study of various mixing models for static dielectric constant (ε0) [Böttcher-Bordewijk (BOTT), Bruggeman (BRUG), Kraszewski (KRAZ), Looyenga (LOOY), Peon–Iglesias (P-I)] and for refractive index (n) [Oster (OST), Weiner (W), Eykman (EYK), Lorentz–Lorentz (L-L), Arago–Biot (A-G), Newton (Nw), Gladstone–Dale (G-D) and Erying–John (EJ)] have been carried out and their validity has been tested for the (n-HxOH+ACP) binary mixtures. The objective of the present work is to report the influence of nonassociative molecule on the molecular dynamics of associative molecules and validation mixing models.

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