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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.18 [2011] >
IJEMS Vol.18(2) [April 2011] >
| Title: | Evaluation of (Bi0.25Sb0.75)2 Te3 charge transport parameters formed by hot press sintering |
| Authors: | Kavei, G |
| Keywords: | Sintering
Hot pressing
Thermal conductivity
Scanning probe microscopy (SPM)
Transport parameters |
| Issue Date: | Apr-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | P-type (Bi0.25Sb0.75)2Te3
thermoelectric crystal has higher figure of merit Z than other
stoichiometries. The prepared crystal of this compound is pulverized in a
particle size ratio of 64% with mesh 80 (200  m2)/36% with a mesh of
60 (250 m2). The powder is sintered in a heat up to 350-500ºC under
pressing load of 500 MPa (hot pressing). The method comprehension on transport
parameters of the compound systematically investigated in nano-scale intrinsic
structures by systems of X-ray diffraction, scanning electron microscopy and
atomic force microscopy. The obtained data determined homogeneous structures
for hot pressed samples along longitudinal and transversal directions. Thermal
and electrical conductivities at optimum sintering temperature lead to a
maximum Z value of around 1.92×10-3 K-1. |
| Page(s): | 161-167 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.18(2) [April 2011]
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