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Computation of Temperature Distribution in Infiltration of Metal in Opal Using a Graphite Furnace Heating Assembly

Published online by Cambridge University Press:  15 February 2011

Hossein Golnabi ,
Mahmood Ghorannevis  and
Nahid Chaboki
Hossein Golnabi
Affiliation:
Plasma Physics Research Center, Islamic Azad University, P.O. Box 14665-678, Tehran, Iran
Mahmood Ghorannevis
Affiliation:
Plasma Physics Research Center, Islamic Azad University, P.O. Box 14665-678, Tehran, Iran
Nahid Chaboki
Affiliation:
Plasma Physics Research Center, Islamic Azad University, P.O. Box 14665-678, Tehran, Iran
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Abstract

The use of high temperature furnace assembly used in high–temperature high-pressure machine is proposed and modeled for the infiltration process of metals in opals. The goal here is to provide useful information about the temperature distribution inside the capsule cell in order to save some time and reduce synthesis cost in the real infiltration process. The heat conduction equation is solved for a cylindrical geometry and the variation of the temperature as a function of time and radius distance are reported. The 2-D finite element method for a symmetrical assembly is used and the temperature dependence of heat conductivity of multi elements is considered in the calculations. Temperature dependence of heat conductivity of different elements involved in infiltration process are modeled and also reported here. Such information concerning the temperature distribution inside the infiltration assembly is helpful for both the equilibrium studies and transient conditions. Results of such study help the users to properly select the appropriate temperature gradient for the steady state and transient situations. Such temperature and pressure adjustments are helpful for a successful melt infiltration process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 878: Symposium Y – Solvothermal Synthesis and Processing of Materials , 2005 , Y2.9
Copyright
Copyright © Materials Research Society 2005

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