Ionic conductivity and dielectric relaxation studies of a low-temperature form of silver zinc phosphate

2018 ◽  
Vol 747 ◽  
pp. 543-549 ◽  
Author(s):  
Narimen Chakchouk ◽  
Bassem Louati ◽  
Kamel Guidara
Keyword(s):  
Ionic Conductivity ◽  
Low Temperature ◽  
Dielectric Relaxation ◽  
Zinc Phosphate ◽  
Temperature Form ◽  
Relaxation Studies

Ionic conductivity and dielectric relaxation studies of LiNaSO4 single crystal

2010 ◽  
Vol 181 (19-20) ◽  
pp. 877-882 ◽  
Author(s):  
R.H. Chen ◽  
Chaw-Ming Tseng ◽  
C.S. Shern ◽  
T. Fukami
Keyword(s):  
Ionic Conductivity ◽  
Single Crystal ◽  
Dielectric Relaxation ◽  
Relaxation Studies

Dielectric Relaxation Studies of Silver Nanoparticles dispersed Liquid Crystal

2015 ◽  
Vol 8 (3) ◽  
pp. 2176-2188 ◽  
Author(s):  
Keisham Nanao Singh
Keyword(s):  
Activation Energy ◽  
Silver Nanoparticles ◽  
Liquid Crystal ◽  
Dielectric Relaxation ◽  
Relaxation Process ◽  
Relaxation Times ◽  
Low Frequency ◽  
Bulk Liquid ◽  
Molecular Rearrangement ◽  
Relaxation Studies

This article reports on the Dielectric Relaxation Studies of two Liquid Crystalline compounds - 7O.4 and 7O.6 - doped with dodecanethiol capped Silver Nanoparticles. The liquid crystal molecules are aligned homeotropically using CTAB. The low frequency relaxation process occurring above 1 MHz is fitted to Cole-Cole formula using the software Dielectric Spectra fit. The effect of the Silver Nanoparticles on the molecular dipole dynamics are discussed in terms of the fitted relaxation times, Cole-Cole distribution parameter and activation energy. The study indicate a local molecular rearrangement of the liquid crystal molecules without affecting the order of the bulk liquid crystal molecules but these local molecules surrounding the Silver Nanoparticles do not contribute to the relaxation process in the studied frequency range. The observed effect on activation energy suggests a change in interaction between the nanoparticles/liquid crystal molecules.

The Application of X-Ray Diffraction at Elevated Temperatures to Study the Mechanism of Formation of Sodium Tripolyphosphate

1961 ◽  
Vol 5 ◽  
pp. 276-284
Author(s):  
E. L. Moore ◽  
J. S. Metcalf
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Amorphous Phase ◽  
Elevated Temperatures ◽  
Sodium Tripolyphosphate ◽  
X Ray Diffraction ◽  
Mechanism Of Formation ◽  
X Ray ◽  
Temperature Form ◽  
High Temperature Form

AbstractHigh-temperature X-ray diffraction techniques were employed to study the condensation reactions which occur when sodium orthophosphates are heated to 380°C. Crystalline Na4P2O7 and an amorphous phase were formed first from an equimolar mixture of Na2HPO4·NaH2PO4 and Na2HPO4 at temperatures above 150°C. Further heating resulted in the formation of Na5P3O10-I (high-temperature form) at the expense of the crystalline Na4P4O7 and amorphous phase. Crystalline Na5P3O10-II (low-temperature form) appears after Na5P3O10-I.Conditions which affect the yield of crystalline Na4P2O7 and amorphous phase as intermediates and their effect on the yield of Na5P3O10 are also presented.

Pyrrolidine conformation: A low-temperature dielectric relaxation study

1988 ◽  
Vol 121 (1) ◽  
pp. 131-136 ◽  
Author(s):  
John Gilchrist ◽  
Jean-Claude Duplan ◽  
Yves Infarnet
Keyword(s):  
Low Temperature ◽  
Dielectric Relaxation ◽  
Relaxation Study
Sign in / Sign up

Export Citation Format

Share Document