Structure, spectroscopic and piezoelectric properties of BNBT nanocrystalline ceramics

Rajulu, K. Ch. Varada; Rao, K. Sambasiva; Tilak, B.; Gangadharudu, G.; Swathi, A.

doi:10.1007/s12648-012-0105-3

Cited by 6 publications

(2 citation statements)

References 31 publications

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“…In the present system also (Figure 2b) we observed the similar variation. This will affect the attenuation of sound waves [9]. It is seen from Figure 2c that the attenuation is least for water and increases with increasing EG concentration.…”

Section: Resultsmentioning

confidence: 95%

Ultrasonic Velocity and Rheological Measurement of Coolants

Patel

Parekh

Upadhyay

2013

SSP

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Rheology and ultrasonic velocity (at 2 MHz frequency) properties of Ethylene glycol (EG)-water mixed nano-coolants are studied at different temperatures. Variation in density and viscosity is found to be non-linear with increasing EG concentration. The viscosity of the mix system varies from 3.5 to 16.9 mPa.s. The results show that with increasing EG concentration in the system the ultrasonic velocity increases, reaches maximum and then decreases. The similar trend is observed for all the temperature under investigation. From these data, the adiabatic compressibility, mean free path and attenuation co-efficient have been calculated. The observed variation is explained considering the relative strength of hydrogen bond between EG and water.

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Section: Resultsmentioning

confidence: 95%

Ultrasonic Velocity and Rheological Measurement of Coolants

Patel

Parekh

Upadhyay

2013

SSP

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“…Following relations [11][12][13][14] are used to calculate the parameters by using the experimental values of density, viscosity and ultrasonic velocity.…”

Section: Theorymentioning

confidence: 99%

Molecular Interaction Study of Mixture of N,N-Dimethylformamide, Cyclohexane and Pyridine at Different Frequencies

Satapathy¹,

Mishra²,

Mishra³

2013

Chem Sci Trans

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Abstract:The ultrasonic velocity, density and viscosity have been measured for ternary mixture of N, N dimethylformamide (DMF), cyclohexane and pyridine at different frequencies 2 MHz, 4 MHz and 6 MHz but at constant temperature 318 K. These experimental data's have been used to estimate the parameters such as adiabatic compressibility (β), intermolecular free length (L f ), Gibbs' free energy (∆G), free volume (V f ), specific acoustic impedance (Z) and absorption coefficient (α/f 2 ) for the mixture. The excess values of these parameters are also evaluated and the molecular associations in the mixture are discussed.

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