Limite de solubilité et ségrégation solutale en croissance de cristaux massifs dopés ions de terre rare pour l'optique
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | VELÁZQUEZ, Matias | |
| dc.date.issued | 2013-08-20 | |
| dc.description.abstractEn | In this " Master-level " lecture, we introduce the basic thermodynamics of dissolution in the crystalline state, and of partition (segregation or depletion) of an impurity in a crystal grown by solidification from the melt or from a flux. The examples are chosen in the field of high bandgap dielectric crystals doped with RE3+ cations, of great interest for optical or photonic applications, some of which exploit scintillating or laser materials. An increasing difficulty order is adopted. Firstly, the solid state solubility of Nd3+ cations in CaWO4 is explained, starting from a point defects equation. Schottky's building units and gittermolekül are introduced to allow for the definition of correct chemical potentials, permitting in turn to express the equilibrium solubility limit condition. A strategy to displace solubility equilibria is presented from both thermodynamical and kinetic viewpoints. Secondly, the equilibrium partition coefficient of Er3+ cations in Y2SiO5 is explained in the case of a crystal grown from the melt. Thirdly, the equilibrium partition coefficient of Yb3+ cations in Gd2O3 is explained in the case of a crystal grown from a Li6Gd(BO3)3 flux, that is, a melt of completely different composition. All demonstrations start at the point defect level, by means of mass-, charge- and site-balanced dissolution equations. | |
| dc.language.iso | en | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/ | |
| dc.title | Limite de solubilité et ségrégation solutale en croissance de cristaux massifs dopés ions de terre rare pour l'optique | |
| dc.subject.hal | Chimie | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.page | 14 | |
| bordeaux.country | FR | |
| hal.identifier | cel-00934568 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//cel-00934568v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.title=Limite%20de%20solubilit%C3%A9%20et%20s%C3%A9gr%C3%A9gation%20solutale%20en%20croissance%20de%20cristaux%20massifs%20dop%C3%A9s%20ions%20de%20terre%20rare%20pour%20l'optiq&rft.atitle=Limite%20de%20solubilit%C3%A9%20et%20s%C3%A9gr%C3%A9gation%20solutale%20en%20croissance%20de%20cristaux%20massifs%20dop%C3%A9s%20ions%20de%20terre%20rare%20pour%20l'opti&rft.date=2013-08-20&rft.spage=14&rft.epage=14&rft.au=VEL%C3%81ZQUEZ,%20Matias& |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||