By Topic

Effect of dispersion of nanosize silica fine powder on the thermoelectric properties of cobalt-doped beta-iron disilicide

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
H. Yamada ; Osaka Nat. Res. Inst., Japan ; T. Inoue ; K. Ueno

The reduction of thermal conductivity of beta-iron disilicide is the key to realize thermoelectric power generation based on the material. Nanosize silica powder with the average diameter of 310 nm was dispersed in beta-iron disilicide doped with 5% cobalt. Iron disilicide and fine silica powder were mixed by ball-milling, then hot-pressed at 1100/spl deg/C, followed with post-sintering heat treatment at 848/spl deg/C for 20 h. The temperature dependencies of the physical properties such as the Seebeck coefficient, electrical conductivity, thermal conductivity were evaluated in the temperature range of 40-600/spl deg/C. The thermal conductivity decreased significantly by the fine silica dispersion. Although the electric conductivity also decreased, the thermoelectric figure of merit was improved by the decreased thermal conductivity and increased thermoelectric power.

Published in:

Thermoelectrics, 1999. Eighteenth International Conference on

Date of Conference:

Aug. 29 1999-Sept. 2 1999