Superionic conduction in the amorphous AgI-Ag2O-CrO3 electrolyte system has been studied. The glass-former-to-modifier ratio and the concentration of AgI were varied continuously to establish the glass-forming domain of the system. X-ray diffraction and differential scanning calorimetry were used as sensitive probes. Transport studies and infrared absorption spectroscopy were used to characterise xAgI-(100-x)(Ag2O-CrO3) glasses to help clarify the conduction process and the possible structural units of these electrolytes. © 1993.

A. N.Durga Rani

Krishnaswamy Hariharan

Absorption spectroscopy

Calorimetry

Characterization

Chromium compounds

Crystal Structure

Electrolytes

infrared spectroscopy

Ionic conduction

Silver compounds

Transport properties

X ray analysis

CHROMIUM OXIDE

Differential scanning calorimetry

GLASS FORMER TO MODIFIER RATIO

INFRARED ABSORPTION SPECTROSCOPY

SILVER IODIDE

SILVER OXIDE

SUPERIONIC CONDUCTION

X ray diffraction

Glass

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

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IIT Madras

Superionic conduction in the glassy AgI-Ag2O-CrO3 system: glass formation and infrared absorption studies

Materials Chemistry and Physics

Journal of Materials Science Letters

Influence of disperoids on the transport behaviour of Ag2HgI4

The compound Ag2HgI4 has been synthesised from K2HgI4 and AgNO3 solutions. Various dispersoids of sub-micron particle size like alumina (0.06 μ), silica (0.0071 μ) and polishing alumina (800 mesh) have been dispersed into the Ag2HgI4 matrix. The dispersoids were added to AgNO3 solution and precipitated with K2HgI4 solution followed by vigorous stirring. The effect of dispersion on the conduction characteristics of Ag2HgI4 is reported. © 1990.

Effect of dispersoids on the conduction characteristics of Ag2HgI4

The electronic spectra of CrO2-4 ions embedded in cesium halide lattices show two well defined bands due to dipole allowed transitions along with some weak bands due to forbidden transitions. All the above bands are interpreted in terms of transitions within molecu ar orbital levels using the Ballhausen and Liehr scheme. It is observed that superposed on the electronic transitions there is a vibrational fine structure which arises due to the coupling between the electronic transitions and the totally symmetric stretching frequency of the ion. IR absorption spectrum of Analar grade CsI :CrO2-4 shows seven lines, whereas Specpure CsI :CrO2-4 shows five lines. The above spectra are interpreted on the basis of different local symmetries of CrO2-4 ions in the lattice. © 1980.

Journal	Materials Chemistry and Physics
ISSN	02540584
Open Access	No