Showing papers by "Maheshwar Sharon published in 1995"
TL;DR: In this article, the crystal structure and surface morphology of the mixture were determined by X-ray diffraction and scanning electron microscopy respectively, and energy dispersive Xray analysis measurements were used to establish the phases present.
6 citations
TL;DR: A single phase Sr-based Tb-123 phase has been synthesized by chemical stabilization as mentioned in this paper, which exhibits superconductivity at Tc, zero=22 K. Tb is present as a trivalent ion in the superconducting phase as derived from x-ray photoelectron spectroscopy.
Abstract: A single‐phase Sr‐based Tb‐123 phase has been synthesized by chemical stabilization. TbSr2Cu2.85Re0.15O7+δ exhibits superconductivity at Tc,zero=22 K. X‐ray diffraction results suggest a relatively small orthorhombicity and neutron diffraction studies indicate an excess oxygen content (≥7.2) in the sample. Tb is present as a trivalent ion in the superconducting phase as derived from x‐ray photoelectron spectroscopy.
5 citations
04 Jul 1995
TL;DR: In this article, the crystal structure and surface morphology of the mixture were determined by X-ray diffraction and scanning electron microscopy respectively, and energy dispersive Xray analysis measurements were used to establish the phases present.
Abstract: A new PbTiO 3 + PbO photoelectrode system for a photoelectrochemical cell has been prepared from a mixture of β-PbO 2 and TiO 2 by solid state sintering. The crystal structure and surface morphology of the mixture were determined by X-ray diffraction and scanning electron microscopy respectively, and energy dispersive X-ray analysis measurements were used to establish the phases present. These studies reveal the photoelectrode as a PbO-rich PbTiO 3 mixed-phase oxide with high tetragonality and a crystalline nature. Mott-Schottky plots and photoelectrochemical measurements, such as the action spectrum, I-V characteristics etc., of this mixed oxide were evaluated in 0.1 M Fe(CN) 3-/4- 6 (pH 9.2 buffer) redox electrolyte. These investigations suggest that the mixed-oxide electrode exhibits n-type conductivity, a decreased band-gap energy and an enhanced absorption range in the visible region.
1 citations