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International Journal of Engineering, Mathematical and Physical Sciences

ISSN: 2517-9934

Total 22 content found

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An Automated High Pressure Differential Thermal Analysis System for Phase Transformation Studies

Year: 2011 Volume: 5 Issue: 10 1552 - 1556 Pages

Abstract: A piston cylinder based high pressure differential thermal analyzer system is developed to investigate phase transformations, melting, glass transitions, crystallization behavior of inorganic materials, glassy systems etc., at ambient to 4 GPa and at room temperature to 1073 K. The pressure is calibrated by the phase transition of bismuth and ytterbium and temperature is calibrated by using thermocouple data chart. The system developed is calibrated using benzoic acid, ammonium nitrate and it has a pressure and temperature control of ± 8.9 x 10 -4 GPa , ± 2 K respectively. The phase transition of Asx Te100-x chalcogenides, ferrous oxide and strontium boride are studied using the indigenously developed system.

Information Entropy of Isospectral Hydrogen Atom

Year: 2011 Volume: 5 Issue: 10 1547 - 1551 Pages

Abstract: The position and momentum space information entropies of hydrogen atom are exactly evaluated. Using isospectral Hamiltonian approach, a family of isospectral potentials is constructed having same energy eigenvalues as that of the original potential. The information entropy content is obtained in position space as well as in momentum space. It is shown that the information entropy content in each level can be re-arranged as a function of deformation parameter.