Paper Title:
Thermal Conductivity of Porous Alumina-Zirconia Prepared by Foam Technique for Applications in Cooling Systems of Artificial Satellites
  Abstract

Porous ceramics are of great interest due to their numerous potential applications. The objective of the present investigation was to produce porous alumina with 3 mol % yttria-stabilized tetragonal zirconia (Y-TZP). This material will be used in cooling systems of satellites. To obtain the porous ceramics the direct foaming technique was used. This method is based on the preparation of a stable foam to which a slurry of alumina and zirconia is added. The mixture is then vigorously stirred for incorporation of air. The sintered ceramics were characterized by scanning electron microscopy, mercury porosimetry and thermal conductivity. The tests performed with the porous alumina-zirconia ceramic composite obtained by this method, showed low thermal conductivity values, high porosity and uniform microstructure with 20–100 µm open pores. The results show that the alumina-zirconia composites tested in this study have a potential for application in loop heat pipes of cooling systems of satellites.

  Info
Periodical
Materials Science Forum (Volumes 636-637)
Edited by
Luís Guerra ROSA and Fernanda MARGARIDO
Pages
161-167
DOI
10.4028/www.scientific.net/MSF.636-637.161
Citation
A. C. O. Hirschmann, M. do C. de A. Nono, C. R. M. Silva, "Thermal Conductivity of Porous Alumina-Zirconia Prepared by Foam Technique for Applications in Cooling Systems of Artificial Satellites", Materials Science Forum, Vols. 636-637, pp. 161-167, 2010
Online since
January 2010
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: Xiao Lei Li, Li Ying Wang, Er An Zai, Hong An Ma, Xiao Peng Jia
Abstract:Heat treatment is an effective means of structural adjustment and performance improvement of AlN ceramics. AlN ceramics prepared at high...
68
Authors: Tiago Delbrücke, Rogério A. Gouvêa, Cristiane W. Raubach, Elson Longo, Vânia Caldas Sousa, Sergio M. Tebcheranic, Evaldo T. Kubaski, Mário Lúcio Moreira, Jose R. Jurado, Sergio Cava
Chapter 5: Structural Ceramics
Abstract:The improvement on the development of porous ceramic materials has leaded to new technologies in thermal insulation, for example, composite...
268
Authors: Fabiana Ribeiro da Silva Schanuel, Wilson Acchar
Chapter 5: Bioceramics
Abstract:The aim of this study was to evaluate the dependence of sintering conditions on mechanical properties and microstructure of zirconia...
143