Effect of partial substitution of Hg on structural and electrical properties of High Temperatur Super Conductor

H. Razeg, K.

	Effect of partial substitution of Hg on structural and electrical properties of High Temperatur Super Conductor
Tikrit Journal of Pure Science
Article 1, Volume 16, Issue 3, 2011, Pages 153-163
Author
K. H. Razeg
Abstract
The high temperature Bi2Ba2Ca2Cu3O10+0 super conductor compound have been prepared by using the solid state reaction and annealing methods under different hydrostatic pressures and annealing temperatures. It has been found that the best annealing temperature and hydrostatic pressure for the compound is (850C0) and (8ton/cm2) respectively. These circumstances were the best to obtain the mentioned compound samples of super conductor. From studying the x-ray diffraction for Bi2Ba2Ca2Cu3O10+0 compound prepared with annealing temperature (850C0) and hydrostatic pressure (8ton/cm2), it has been clear that the compound has a crystalline structure of Tetragonal. At partial substitution of (Hg) in (Bi) element, the compound becomes in the following formula: Bi2-xHgxBa2Ca2Cu3O10+0 with different values of (X) equals to (X= 0.1, 0.2, 0.3, 0.4, 0.5). The study of the crystalline structure showed that the compound keeps on its tetragonal, and increasing the temperature (132-1350)k at partial substitution of the element (X= 0.1, 0.2). When the concentration rate of (Hg) increased with (X= 0.3), the critical temperature increased to (1380)K. This can be explained by that the compound took the perfection role in the crystalline structure. This substitution rate caused an increasing in the critical temperature as well as increasing the oxygen rate which caused an increasing in the critical temperature. Therefore, the crystalline structure of the samples had been studied by Scanning Electron Microscopic, and knowing the elements' rates in the compound, effect range of the annealing temperature, the imposed pressure, effect range of the partial substitution in the elements, and determination of the quantitative and qualitative concentration of elements in the compound.

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