AC impedance and dielectric studies of biopolymer electrolytes based on I-carrageenan

2021 ◽  
pp. 1-8
Author(s):  
Thirupathi Mahalakshmi ◽  
Chandran Sankareswari ◽  
Santhana Krishnan Jayanthi
Keyword(s):  
Ac Impedance ◽  
Dielectric Studies ◽  
Biopolymer Electrolytes

Ionic Conductivity and Dielectric Properties of CMC Doped NH4SCN Solid Biopolymer Electrolytes

2015 ◽  
Vol 1107 ◽  
pp. 230-235 ◽  
Author(s):  
N.A.M. Noor ◽  
M.I.N. Isa
Keyword(s):  
Dielectric Properties ◽  
Ionic Conductivity ◽  
Electrical Impedance ◽  
Ammonium Thiocyanate ◽  
Electrical Impedance Spectroscopy ◽  
Dielectric Studies ◽  
Arrhenius Law ◽  
Casting Method ◽  
Biopolymer Electrolytes ◽  
Solution Casting Method

In this work, solid biopolymer electrolytes (SBE) containing carboxymethyl cellulose (CMC) doped with ammonium thiocyanate (NH4SCN) were prepared via solution casting method. The ionic conductivity and dielectric properties of CMC-NH4SCN system were investigated by electrical impedance spectroscopy in the temperature range of 303-353 K. The dc conductivity shows that the highest ionic conductivity of 6.48 x 10-5 Scm-1 at ambient temperature was obtained when 25 wt.% of NH4SCN was incorporated. The temperature dependence of ionic conductivity revealed that CMC-NH4SCN system was discovered to obey Arrhenius law where the regression value is almost unity (R2≈1). Activation energy of CMC-NH4SCN system was found to decrease with the increment of NH4SCN concentration. The dielectric behaviour of the CMC-NH4SCN system have been analyzed using dielectric permittivity (ε*) and electrical modulus (M*) spectra. Results from dielectric studies showed a non-Debye behaviour of CMC-NH4SCN system.

scholarly journals Room temperature ac impedance and dielectric studies of Bi and Sr doped PrCo0.6Fe0.4O3 perovskites

2017 ◽  
Vol 11 (1) ◽  
pp. 52-59 ◽  
Author(s):  
Unikoth Megha ◽  
George Varghese ◽  
Karakat Shijina
Keyword(s):  
Room Temperature ◽  
Ac Impedance ◽  
Dielectric Studies

AC impedance studies on proton conducting biopolymer electrolytes based on pectin

2018 ◽  
Vol 218 ◽  
pp. 197-200 ◽  
Author(s):  
M. Vahini ◽  
M. Muthuvinayagam
Keyword(s):  
Ac Impedance ◽  
Proton Conducting ◽  
Biopolymer Electrolytes

Impact of oxygen doping on AC impedance, complex dielectric and electrical modulus spectra of a Hg-Ba-Ca-Cu-O ceramic

2019 ◽  
Vol 61 (7) ◽  
pp. 685-689 ◽  
Author(s):  
Özden Aslan Çataltepe ◽  
Zeynep Güven Özdemir ◽  
Mehmet Kılıç ◽  
Ülker Onbaşlı
Keyword(s):  
Ac Impedance ◽  
Electrical Modulus ◽  
Oxygen Doping

Crystal structure, DSC AND Dielectric studies IN [NH3(CH2)5NH3] BiCl5

2005 ◽  
Vol 30 (1) ◽  
pp. 55-65 ◽  
Author(s):  
Anouar Gargouri ◽  
Slaheddine Chaaboui ◽  
Abdelhamid Ben Salah
Keyword(s):  
Crystal Structure ◽  
Dielectric Studies

Dielectric studies of proton migration and relaxation in wet cellulose and its derivatives

Polymer ◽  
1981 ◽  
Vol 22 (8) ◽  
pp. 1048-1053 ◽  
Author(s):  
Derek J. Crofton ◽  
Richard A. Pethrick
Keyword(s):  
Dielectric Studies ◽  
Proton Migration

scholarly journals Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar

2020 ◽  
Vol 9 (1) ◽  
pp. 1445-1455
Author(s):  
Song Gao ◽  
Jianlin Luo ◽  
Jigang Zhang ◽  
Fei Teng ◽  
Chao Liu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Cement Mortar ◽  
Aqueous Suspension ◽  
Ac Impedance ◽  
Stress Sensitivity ◽  
Multiwall Carbon Nanotube ◽  
Impedance Technique ◽  
Reinforced Cement ◽  
Coated Sand ◽  
Mechanical Strengths

Abstract Water and sand were used as the medium of multiwall carbon nanotube (MCNT) and prepared MCNT aqueous suspension and MCNT suspension-coated sand, respectively; afterwards, they were introduced into cement mortar (MNT/CM, MNTSM), respectively. Next, mechanical strengths and piezoresistive properties (DC resistivities (ρ v), AC impedances (Z r)) under cyclic loadings (σ c) of two types of MNT/CM and MNTSM nanocomposites were investigated to explore the intrinsic and self-sensing behaviors. Results reveal that MCNT can be evenly and well-coated on sand, which favors to achieve its intrinsic self-sensing property. Although the fraction changes in ρ v and Z r under the same σ c of MNTSM are both lower than those of MNT/CM, the stress sensitivity of MNTSM is only −1.16%/MPa (DC resistivity), −1.55%/MPa (AC impedance); its sensing linearity and stability (2.53, 2.45%; 2.73, 2.67%) are superior to those of MNT/CM (4.94, 2.57%; 3.78, 2.96%). Piezoresistivity using AC impedance technique is helpful to acquire balanced sensing sensitivity and stability while applied as intrinsic sensors in infrastructure.

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