High Frequency Dielectric Response of the Ionic Liquid N-Methyl-N-ethylpyrrolidinium Dicyanamide

2007 ◽  
Vol 60 (1) ◽  
pp. 6 ◽  
Author(s):  
Simon Schrödle ◽  
Gary Annat ◽  
Douglas R. MacFarlane ◽  
Maria Forsyth ◽  
Richard Buchner ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Dielectric Loss ◽  
Dielectric Relaxation ◽  
High Frequency ◽  
Dielectric Response ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Dielectric Relaxation Spectroscopy ◽  
Frequency Range ◽  
Fast Rotation

A study of the room-temperature ionic liquid N-methyl-N-ethylpyrrolidinium dicyanamide by dielectric relaxation spectroscopy over the frequency range 0.2 GHz ≤ ν ≤ 89 GHz has revealed that, in addition to the already known lower frequency processes, there is a broad featureless dielectric loss at higher frequencies. The latter is probably due to the translational (oscillatory) motions of the dipolar ions of the IL relative to each other, with additional contributions from their fast rotation.

Dielectric and impedance spectroscopy of K+-doped MgAl2O4 nanoparticles

2018 ◽  
Vol 32 (15) ◽  
pp. 1850189
Author(s):  
Javed Ahmad ◽  
S. H. Bukhari ◽  
M. Qadeer Awan ◽  
M. Ehsan Mazhar ◽  
A. R. Makhdoom
Keyword(s):  
Dielectric Constant ◽  
Impedance Spectroscopy ◽  
High Frequency ◽  
Dielectric Response ◽  
Room Temperature ◽  
Parent Compound ◽  
Low Frequency ◽  
Space Charge Polarization ◽  
Relaxation Phenomena ◽  
Frequency Range

In this study, the dielectric response of Potassium (K[Formula: see text])-doped magnesium aluminates nanoparticles (Mg[Formula: see text]K[Formula: see text]Al2O4, x = 0.0, 0.25, 0.5, 0.75, 1.0) have been investigated as a function of frequency (20 Hz to 2 MHz) at room-temperature. Interestingly, the behavior of dielectric constant indicated the ionic or space charge polarization in the low-frequency range and it remains almost constant at high frequency. However, the value of conductivity increases at higher frequencies which is consistent with the previously reported results for the parent compound MgAl2O4. Moreover, the Cole–Cole plots represent various relaxation phenomena reflecting the existence of grain (boundaries) resistance effects.

scholarly journals Lattice strain driven dielectric insulation response of Sr1−xCaxBi2Nb2O9 ceramics

2016 ◽  
Vol 06 (03) ◽  
pp. 1650021
Author(s):  
Vaibhav Shrivastava
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
High Frequency ◽  
Room Temperature ◽  
Lattice Strain ◽  
Calcium Content ◽  
Wide Frequency Range ◽  
Frequency Range ◽  
Dielectric Insulation ◽  
Room Temperature Dielectric Constant

In this paper, effects of lattice strain on dielectric properties of Sr[Formula: see text]CaxBi2Nb2O9 ([Formula: see text]–0.5 in steps of 0.1) ceramics are reported. High frequency dipolar polarization is observed to increase for 10% calcium addition and suppresses thereafter on higher calcium concentrations. The dielectric loss values for all doped samples were lower compared to undoped one at frequencies beyond 1[Formula: see text]kHz. The sample with [Formula: see text] shows room temperature dielectric constant in the range (130[Formula: see text][Formula: see text][Formula: see text]12) over a wide frequency range from 50[Formula: see text]Hz to 1[Formula: see text]MHz also minimum dielectric loss among all other sample for the same frequency range. Remarkable increase in Curie temperature ([Formula: see text]) by 50[Formula: see text]C is recorded in the present work by increasing 10% calcium content in SBN compostion. All higher doped samples indicate increase in [Formula: see text] by further higher amount. In addition, dc conductivity of all samples is measured for all samples and increase in calcium content is observed to generate more insulating compositions compared to undoped SBN with higher intrinsic activation energies.

The Solvent Effect on H2O2 Generation at Room Temperature Ionic Liquid|Water Interface

ChemPhysChem ◽  
2021 ◽  
Author(s):  
Marcin Wojciech Opallo ◽  
Justyna Kalisz ◽  
Wojciech Nogala ◽  
Wojciech Adamiak ◽  
Mateusz Gocyla ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solvent Effect ◽  
Liquid Water ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Water Interface ◽  
H2o2 Generation

Electrochemical Kinetics of Ag|Ag+and TMPD|TMPD+•in the Room-Temperature Ionic Liquid [C4mpyrr][NTf2]; toward Optimizing Reference Electrodes for Voltammetry in RTILs

2007 ◽  
Vol 111 (37) ◽  
pp. 13957-13966 ◽  
Author(s):  
Emma I. Rogers ◽  
Debbie S. Silvester ◽  
Sarah E. Ward Jones ◽  
Leigh Aldous ◽  
Christopher Hardacre ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Electrochemical Kinetics ◽  
Reference Electrodes ◽  
Kinetics Of

Origin of a High Overpotential of Co Electrodeposition in a Room-Temperature Ionic Liquid

2020 ◽  
Vol 11 (20) ◽  
pp. 8697-8702
Author(s):  
Kenta Motobayashi ◽  
Yuhei Shibamura ◽  
Katsuyoshi Ikeda
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid
Sign in / Sign up

Export Citation Format

Share Document