Paper Title:
Effect of Ag on the Thermoelectric Properties of Ag2Se Alloy Prepared by Mechanical Alloying Process
  Abstract

The thermoelectric properties of Ag2Se and excess Ag alloys synthesized by mechanical alloying process were studied. The absolute S value slightly decreased with the Ag content. Contrary to that, the electrical conductivity (σ) increased with the Ag content. This was due to the increased carrier concentration supplied by the excess Ag clusters. Below 280K, the σ value of the excess Ag alloys is almost constant regardless of temperature, which means that the Ag excess alloys is highly degenerated. At higher temperatures above 290 K, the intrinsic conduction behavior for all materials is observed and the band gap energy for Ag2Se calculated from the slope of curve in this higher temperature range is about 220 meV. The figure of merit value (Z) was increased by the excess Ag, from 0.28/K (Ag2Se) to 0.91/K (Ag2.05Se0.95).

  Info
Periodical
Materials Science Forum (Volumes 534-536)
Edited by
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Pages
173-176
DOI
10.4028/www.scientific.net/MSF.534-536.173
Citation
W. K. Min, H.D. Hwang, C.H. Lee, I. M. Park, Y. H. Park, "Effect of Ag on the Thermoelectric Properties of Ag2Se Alloy Prepared by Mechanical Alloying Process ", Materials Science Forum, Vols. 534-536, pp. 173-176, 2007
Online since
January 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hyeon Taek Son, J.M. Hong, Ik Hyun Oh, Jae Seol Lee, T.S. Kim, Kouichi Maruyama
Abstract:Mg97Zn1Y2 alloy powders were prepared from gas atomization process, followed by consolidation using spark plasma sintering (SPS) process....
1517
Authors: Xiao Ping Luo, Lan Ting Xia, Ming Gang Zhang
Abstract:The effect of Cd and Sb addition on the microstructural and mechanical properties of as-cast AZ31 alloys was investigated and compared. The...
197
Authors: Katarzyna Bałdys, Grzegorz Dercz, Łukasz Madej
Abstract:The ferromagnetic shape memory alloys (FSMA) are relatively the brand new smart materials group. The most interesting issue connected with...
171
Authors: Thangaraju Shanmugasundaram, Martin Heilmaier, V. Subramanya Sarma, B.S Murty
Chapter 5: Microstructure and Properties
Abstract:Bulk nanostructured Al-4Cu alloy was synthesized by high energy ball milling followed by vacuum hot pressing. Its thermal stability was...
234
Authors: Hong Wei Liu, Yon Gan Zhang, Jian Bo Zhang, Bao Hong Zhu, Feng Wang, Zhi Hui Li, Xi Wu Li, Bai Qing Xiong
Chapter 1: Materials Properties
Abstract:Microstructural characterization of Al-Cu-Mg-Ag alloy ageing at low and elevated temperature were investigated by differential scanning...
1225