Skip to Main content Skip to Navigation
Theses

Sintering of cerium oxide based materials by microwave heating

Abstract : The main objective of this thesis is the evaluation of the heating by microwave technology and its applicability in the densification step, as a part of nuclear long life wastes recycling process and then the following up of the sintering of cerium oxide, a non-radioactive simulant of plutonium oxide. In this work, we developed a system for determining the dielectric properties of cerium oxide and made a comparative study between the sintering by microwave heating in a single-mode cavity and the conventional sintering in a dilatometer for two different powders of ceria: the first one has a micrometric particle size and the second has a nanometric one. In addition, we performed several numerical simulations on the basis of a model coupling electromagnetics and heat transfer. In these works, we have shown the effect of the size of a spherical model particle on the electric field (E) inside and around the particle. In the framework of a packing model of particles, the presence of a neck between these particles, their orientation relative to E field, and the number of these particles showed a decisive role in the intensity of the E field which has a direct impact on the heating of the particles.
Document type :
Theses
Complete list of metadatas

Cited literature [62 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01665172
Contributor : Abes Star :  Contact
Submitted on : Friday, December 15, 2017 - 3:44:52 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:41 PM

File

hussein-hammoud-diff.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01665172, version 1

Collections

Citation

Hussein Hammoud. Sintering of cerium oxide based materials by microwave heating. Other. Université de Lyon, 2016. English. ⟨NNT : 2016LYSEM004⟩. ⟨tel-01665172⟩

Share

Metrics

Record views

633

Files downloads

1043