Microwave Dielectric Measurements

Dakin, T. W.; Works, C. N.

doi:10.1063/1.1697843

Cited by 115 publications

(23 citation statements)

References 15 publications

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“…The frequency 9.98 GHz was fixed such that the intensity was maximum at the output. The technique adopted for these measurements was from Wiffin and Thompson [20] modified later by Dakin and Works [22].…”

Section: Methodsmentioning

confidence: 99%

On the visco-elastic and dielectric behaviour of two alcohols and their binary mixture

Ayachit¹,

Hosamani

Deshpande

2011

Physics and Chemistry of Liquids

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Inter-molecular and intra-molecular interactions in liquids determine the physical properties of the systems. These interactions are understood through the measurement of these physical properties. These become especially important in the case of alcohols in view of the specific type of interactions involved. Study of the variation of dielectric relaxation time with the viscosity of the medium is relevant in drawing certain quantitative conclusions regarding molecular motion and the inter-molecular forces in liquids, liquid mixtures, dilute solutions and multi-component polar solutes in dilute solution. In the absence of a perfect empirical or theoretical equation for the variation of dielectric relaxation time with viscosity, the experimental investigations on different systems can only give an insight. In the present study, the results of dielectric measurements carried out on pure samples of methyl alcohol and propyl alcohol in dilute solutions in different mixed solvents (benzene þ paraffin) and on binary mixture (1 : 1) of methyl alcohol þ propyl alcohol are reported. Different parameters determined are presented and these studies indicate that the dielectric behaviour at microwave frequencies favour the concept of dynamic viscosity and a single visco-elastic relaxation time for the systems under study.

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Section: Methodsmentioning

confidence: 99%

On the visco-elastic and dielectric behaviour of two alcohols and their binary mixture

Ayachit¹,

Hosamani

Deshpande

2011

Physics and Chemistry of Liquids

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show abstract

“…The frequency 9.98 was fixed such that the intensity is maximum at the output. The technique adopted for these measurements was due to Wiffin and Thompson [29] modified later by Dekin and Works [31]. The static permittivities and the permittivities at optical frequencies were determined by usual manner (square of the refractive index of dilute solutions for sodium D-line), respectively, using Franklin oscillator and Abbe's refractometer.…”

Section: Methodsmentioning

confidence: 99%

Dielectric studies on some mesogenic, non-mesogenic and organic molecules

Sannaninganavar¹,

Ayachit

Deshpande

2009

Physics and Chemistry of Liquids

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Two important molecular parameters, namely, the dielectric relaxation time and electric dipole moment are highly useful in having insight into the molecular structure, size, shape, apart from the inter-and intra-molecular forces, etc. With these in view dielectric measurements in benzene at room temperature on the pure samples of o-ethyl phenol, 2-n-butylphenol, 4-n-butylphenol, 2,6-dimethoxyphenol and 3,4-difluorophenol were carried out at a frequency of 9.98 GHz by employing concentration variation method. Similar measurements, on a single weight fraction of each of them at 9.98 GHz and also at 8.74 GHz are carried out. Measurements on a single weight fraction in benzene of each of the liquid crystal samples, namely, EPCP.car (Butyl-p-(p-ethoxy phenoxy corbonyl)-phenyl carbonate), PPPB (p-pentylphenyl-p-propyl benzonate), EPAP.Hp (p-(p-ethoxyphenyl azo) phenyl heptenate) and EPAP. Und (p-(p-ethoxyphenyl azo) phenyl undecylenate were also carried out at the said two frequencies. Using the obtained values of " 0 , " 00 relaxation time and dipole moment were determined using different methods. The obtained results are compared with earlier results wherever available.

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“…Maze [15] has presented an optimized-solution technique where at each frequency scattering parameters are taken for various short-circuit termination positions. Dakin and Work [16] developed a procedure for low-loss materials and Bowie and Kelleher [17] presented a rapid graphical technique for solving the scattering equations. Other authors have presented methods using measurements on two or more sample lengths [18].…”

mentioning

confidence: 99%

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Baker–Jarvis¹

1992

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Microwave Dielectric Measurements

Cited by 115 publications

References 15 publications

On the visco-elastic and dielectric behaviour of two alcohols and their binary mixture

On the visco-elastic and dielectric behaviour of two alcohols and their binary mixture

Dielectric studies on some mesogenic, non-mesogenic and organic molecules

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