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2010 | 8 | 6 | 1227-1235
Article title

Composition-induced phase transition in a [Ag2HgI4:0.2AgI] mixed composite system doped with CuI

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EN
Abstracts
EN
A novel composite superionic system, [Ag2HgI4:0.2AgI]:xCuI, (x = 0.2, 0.4, 0.6 mol. wt.%), was prepared and [Ag2HgI4:0.2AgI] mixed system was used as the host. Electrical conductivity was measured to study the transition behavior at frequencies of 100 Hz, 120 Hz, 1 kHz, and 10 kHz in the temperature range 90°–170°C by a Gen Rad 1659 RLC Digibridge. Sharp increase in conductivity was observed for β-α phase transitions. As a result of increase in the dopant-to-host ratio, the conductivity of the system exhibited Arrhenius (thermally activated)-type behavior. X-ray powder diffraction, differential scanning calorimetry (DSC), differential thermal analysis (DTA) and thermo-gravimetric analysis (TGA) studies confirmed the doping effect on the transition in the host, the phase transition temperature increased with an increase in the dopant concentration. Activation energies for the system in eV both for the pretransition and post-transition phase transformations are reported. The addition of CuI to [Ag2HgI4:0.2AgI] shifted the phase transition of the host [Ag2HgI4:0.2AgI], due to an interaction between [Ag2HgI4:0.2AgI] and CuI.
Publisher

Journal
Year
Volume
8
Issue
6
Pages
1227-1235
Physical description
Dates
published
1 - 12 - 2010
online
8 - 10 - 2010
Contributors
author
  • Solid State Chemistry Lab, Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India
author
  • Solid State Chemistry Lab, Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India, afaqahmad21@gmail.com
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-010-0098-8
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