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@PHDTHESIS{Markus:58863,
author = {Markus, Torsten},
title = {{T}hermochemische {U}ntersuchungen zur
{H}ochtemperaturkorrosion von polykristallinem
{A}luminiumoxid ({PCA}) durch {M}etallhalogenide},
volume = {3955},
issn = {0944-2952},
school = {Techn. Hochsch. Aachen},
type = {Dr. (FH)},
address = {Jülich},
publisher = {Forschungszentrum Jülich Gmbh Zentralbibliothek, Verlag},
reportid = {PreJuSER-58863, Juel-3955},
series = {Berichte des Forschungszentrums Jülich},
pages = {167 p.},
year = {2002},
note = {Record converted from VDB: 12.11.2012; Aachen, Techn.
Hochsch., Diss., 2002},
abstract = {The accomplished investigations in the context of the
available work concerning the hightemperature corrosion of
polycrystalline alumina (PCA) by halides of the alkalis and
the lanthanides are from special interest in the lamp
industry. Mixtures from alkali halides and halides of the
lanthanides are an indispensable component of modem metal
halide lamps. The halides of the lanthanides produce a very
line-rich emission spectrum in the arc of the gas-discharge
lamp within the visible range which is very close to that of
the natural sunlight. Caused by the high temperatures and
temperature gradients in a burner vessel chemical reactions
between the lamp filling and the wall of the discharge
vessel as well as the electrodes take place. Chemical
transport can be observed, which can finally lead to a
reduction of the wall thickness and to a failure of the
lamp. The goal of this work is the clearingup of the so far
not understood mechanisms of the corrosion processes
observed in metal halide lamps with PCA bumers. For the
improvement of the lamp characteristics it is finally the
goal of describing these lamps in a computer-model in order
to be able to make statements concerning the corrosion
behavior. Apart from the understanding of the corrosion
mechanisms it is important for the modelling to identify the
foimed corrosion phases and to detemine their themochemical
data. The available work makes a contribution to this.},
cin = {IWV-2},
cid = {I:(DE-Juel1)VDB2},
pnm = {Brennstoffzelle},
pid = {G:(DE-Juel1)FUEK246},
typ = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
url = {https://juser.fz-juelich.de/record/58863},
}