Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   JOURNAL OF THEORETICAL AND APPLIED PHYSICS (IRANIAN PHYSICAL JOURNAL)   MARCH 2013 , Volume 7 , Number 7; Page(s) 1 To 5.
 
Paper: 

ANOMALY IN THE SPECIFIC HEAT OF LEAD TELLURIDES

 
 
Author(s):  YONEDA SEIJI*, KATO MASAHIKO, OHSUGI ISAO J.
 
* KANAGAWA UNIVERSITY, 3-27-1 ROKKAKUBASHI, KANAGAWA-KU, YOKOHAMA 221-8686, JAPAN
 
Abstract: 

Specific heats of two types of lead tellurides, namely p-type Pb1-x Snx Te (x=0.0, 0.1, 0.3, 0.5, 0.7, 0.9, 1.0) and n-type PbTe doped with y mass% PbI2 (y=0.0, 0.2, 0.5, 0.8, 1.0), were observed in the temperature range of 50oC to 500oC using a differential scanning calorimeter (DSC). The specific heat of pure Te is also observed in the same temperature range to confirm the dominance of Te. At lower temperatures below 200oC, all the observed data were fairly consistent with those predicted on the basis of Dulong-Petit’s law, while above 200oC, the observed data showed curious temperature dependences. At high temperatures above 200oC, DSC analysis, with the aid of the experiment on pure Te, revealed an anomalously large specific heat that can be predicted from the Schottky defects caused by decomposition and sublimation of Te. In the n-type case, the anomaly in specific heats is rather smaller than that in the p-type case, which fact suggested that the dopant PbI2 may suppress the decomposition and sublimation of Te from lead tellurides.

 
Keyword(s): SPECIFIC HEAT, DSC ANALYSIS, PBTE, PB1-XSNXTE, THERMOELECTRIC MATERIAL
 
References: 
  • ندارد
 
  pdf-File tarjomyar Yearly Visit 92
 
Latest on Blog
Enter SID Blog