G M Phatak
Articles written in Bulletin of Materials Science
Volume 2 Issue 3 August 1980 pp 151-154
Separation of rare earths from monazite source by ion-exchange process is discussed. Optimum conditions for obtaining kilogram quantities of individual rare earths of high purity are reported.
Volume 14 Issue 2 April 1991 pp 241-246 International Conference On Superconductivity—I
This paper describes the synthesis and microwave absorption studies of single phase Tl-2223 compound, with
Volume 14 Issue 3 June 1991 pp 603-605 International Conference On Superconductivity—II
Coherent inelastic neutron scattering measurements have been carried out on the high temperature superconductors Tl2CaBa2Cu2O8 (Tl-2122,
Volume 14 Issue 3 June 1991 pp 681-686 International Conference On Superconductivity—II
Doppler-broadened annihilation radiation spectra have been measured as a function of temperature from 77 K to 300 K, for several high temperature oxide superconductors viz single-phase YBCO, single- and mixed-phase Tl-Ca-Ba-Cu-O and Bi-Ca-Sr-Cu-O compounds. The temperature-dependent parameters extracted respond to a change at the onset of superconducting transition. The observations point to involvement of oxygen valence electrons at the onset of superconducting transition. Also a possible structural change and/or increase in electron density at the oxygen vacancy/defect sites seem to accompany the transition. In addition, the parameters derived are seen to be sensitive to the presence of more than one superconducting phases in mixed phase samples.
Volume 17 Issue 2 April 1994 pp 163-169
A detailed investigation on luminescence properties of gem-grade zirconia (NFC) as a function of Ti doping is presented. The effect of various parameters such as Ti concentration, environment of heat treatment and temperature was studied in detail and the optimum conditions for producing zirconia with luminescence properties comparable to standard material determined.
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