Thermal properties evaluation with a transient method in powder melts and model describing diferent physico-chemical phenomena comparison

摘要

For high temperature reactors or construction materials, thermal barriers are usually fabricated with porous materials. Their thermal properties depend on complex physical or physico-chemical phenomena (solid conduction, gas conduction, thermal contact resistances, gas convection in pores, surface reaction, surface radiation...). They have to be taken into account in the different theoretical models. The normalised measurement method for thermal properties need long time stabilisation and brick materials. The evaluation with small amount of materials unsing simple setup is now possible with transient methods. They are helpful to generate a database for the use in thermal modelling.