Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1787850 | Current Applied Physics | 2006 | 6 Pages |
Abstract
Simultaneous measurements of effective thermal conductivity (λe) and effective thermal diffusivity (Ïe) of twin pellets of ZnxSe100âx (x = 10, 20, 40 and 50) chalcogenide materials, prepared under a load of 5 tons (equivalent pressure â 433 MPa), have been made at room temperature using transient plane source (TPS) technique. From the measured values of λe and Ïe specific heat per unit volume (Cp) has been calculated. The results indicate that both the values of λe and Ïe increase linearly with increasing Zn concentration. Similar to λe and Ïe, the Cp also shows a linear increase with the increase in Zn concentration. This behaviour of λe and Ïe with increasing Zn concentration can be explained using structural information obtained from X-ray diffraction (XRD) of these materials and also using the change in the nature of bond from covalent to iono-covalent in this system. Comparative XRD studies for structural investigation of ZnxSe100âx (x = 10 and 40) have also been discussed. An effort has also been made to predict these values by an empirical relation. The values obtained through empirical relations are in good agreement with the experimental values of λe, Ïe and calculated values of Cp.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Rakesh Sharma, S.N. Dolia, T.P. Sharma, N.S. Saxena,