Krishnaswamy Hariharan

Rajiv Kaushik

SILVER COMPOUNDS - ELECTRIC CONDUCTIVITY

Superconducting materials

SILVER IODIDE

SILVER ION CONDUCTORS

SILVER VANADATE

Solid electrolytes

SUPERIONIC CONDUCTORS

Solids

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

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Transport studies on the superionic system 4AgI-Ag3VO4: conductivity comparison with the corresponding superionic glass

Journal of Materials Science Letters

Deposition of thin films of the solid electrolyte Ag7I4VO4 by an electrodeposition technique is discussed. The X-ray diffraction technique has been used for the characterization of the films. Measurement of a.c. electrical conductivity in the temperature range 300-400 K showed that films deposited at 313 K and at a current density of 8 mAcm-2 are of the best quality, having a typical conductivity of 1.5 x 10-3Ω-1cm-1 at room temperature (305K) with an activation energy of 0.2eV. Dielectric studies carried out on the best quality films showed that Ag7I4VO4 possesses a high value of dielectric constant (∼ 105). The frequency dependence of the dielectric constant is explained as due to an interfacial polarization phenomenon. The behaviour of the dielectric ion suggests a Debye-type relaxation. © 1987 Chapman and Hall Ltd.

Journal of Applied Electrochemistry

Transport studies on thin films of Ag7I4VO4 solid electrolyte

Superionic conducting glasses in the Agl-Ag2O-V2O5 system were prepared by heating the appropriate amounts of raw materials at 723 K and quenching in liquid nitrogen. The polycrystalline materials were prepared by slowly cooling the melt to room temperature. X-ray diffraction was used for material characterization. The electrical conductivity of the pulverized samples, pressed together with an electrode mixture of silver and electrolyte (1:2 by weight) under 5000 kg cm-2 pressure to form pellets 10 mm in diameter and 2 to 3 mm in thickness, was measured in the temperature range 300 to 365 K at 1 kHz. The ionic conductivities of the glasses were always higher than those of their polycrystalline counterparts, while their activation energies were also slightly higher. Conductivity measurements on annealed glassy samples indicated that the conductivity decreases with the time of annealing, and reaches a constant value which is nearly the same as that of the polycrystalline sample. Electronic conductivities of both types of sample were obtained by using Wagner's polarization cell technique, which showed that the electronic conductivity for both types was five orders of magnitude less than the total conductivity. Typical galvanic cells having the configuration Ag,electrolyte/electrolyte/C,electrolyte,I2 were constructed and the silver ion transport number was calculated by the e.m.f. method. © 1987 Chapman and Hall Ltd.

Journal of Materials Science

The superionic Agl-Ag2O-V2O5 system: Electrical conductivity studies on glass and polycrystalline forms

Conservation Biology

Recently Received Books (February 2006-April 2006)

Foundations of Physics

10.1023/a:1004164107178

Journal of The Electrochemical Society

Glassy Electrolyte Galvanic Cells

Journal of Solid State Chemistry

Thermoelectric power of superionic conductors

Physica Status Solidi (a)

Transport studies on superionic conductors

Journal	Journal of Materials Science Letters
Publisher	Kluwer Academic Publishers
ISSN	02618028
Open Access	No